ahu instalation manual york

GENERALThe complete assembled indoor units include a well insulated cabinet, copper tube/aluminum fin coil, a centrifugal blower, a blower motor, an adjustable V-belt drive, an expansion valve and distributor. These cooling only ducted split system should come with vertical air discharge as standard and can be convertible to horizontal air discharge at site by reposition the air duct flange and the small cover at front side. Installer should pay particular attention to the words:NOTE, CAUTION and WARNING. Notes are intended to clarify or make installation easier.Cautions are given to prevent equipment damage. Warnings are given to alert installer that personal injury and/or equipment damage may result if installation procedure is not handled properly.

INSPECTIONAs soon as a unit is received, it should be inspected for possible damage during transit.If damage is evident, the extent of the damage should be noted on the carrier’s freight bill.A separate request for inspection by the carrier’s agent should be made in writing.

INSTALLATION INSTRUCTION

EVAPORATOR BLOWERSMAC 200-600

CAUTIONTHIS PRODUCT MUST BE INSTALLED IN STRICT COMPLIANCE WITH THE ENCLOSED INSTALLATION AND ANY APPLICABLE LOCAL, STATE AND NATIONAL CODES INCLUDING, BUT NOT LIMITED TO BUILDING, ELECTRICAL AND MECHANICAL CODES.

WARNINGINCORRECT INSTALLATION MAY CREATE A CONDITION WHERE THE OPERATION OF THE PRODUCT COULD CAUSE PERSONAL INJURY OR PROPERTY DAMAGE.

Installer should pay particular attention to the words: NOTE, CAUTION and WARNING. Note are intended to clarify or make the installation easier. Cautions are given to prevent equipment damage. Warnings are given to alert installer that personal injury and/or equipment damage may result if installation procedure is not handled properly.

035T83503-000

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2

TABLE OF CONTENTS

GENERAL ............................................................................................................................................................................................1INSPECTION ........................................................................................................................................................................................1PRODUCT NOMENCLATURE .............................................................................................................................................................2SPECIFICATIONS ................................................................................................................................................................................3PERFORMANCE TABLE ..................................................................................................................................................................4-7CAPACITY CORRECTION FACTOR ...................................................................................................................................................8OPERATING RANGE ...........................................................................................................................................................................8DRIVE PACKAGE SELECTION EXAMPLE .........................................................................................................................................9BLOWER PERFORMANCE CURVE ............................................................................................................................................10-13OUTLINE AND DIMENSION .........................................................................................................................................................14-16WIRING DIAGRAMS .....................................................................................................................................................................17-18REFRIGERANT CIRCUIT DIAGRAM ................................................................................................................................................19INSTALLATION AND SERVICE ....................................................................................................................................................19-22MAINTENANCE ............................................................................................................................................................................22-23OPERATION ..................................................................................................................................................................................24-34TROUBLESHOOTING ..................................................................................................................................................................34-35

PRODUCT NOMENCLATUREA C 0 02 5 0SM B

SYSTEM IN WHICH THE UNIT OPERATE

M = Split Duct System

TYPE OF UNIT

A = Air Blower / Ductable

OPERATION MODE

C = Cooling only R-22

CAPACITY

200 = 200,000 BTU250 = 250,000 BTU300 = 300,000 BTU350 = 350,000 BTU400 = 400,000 BTU450 = 450,000 BTU500 = 500,000 BTU600 = 600,000 BTU

GENERATION INDICATOR

S = Saturn Controls Sequencial

POWER PHASE

50 = 380/415V-3-50Hz

COIL TYPE

B = DX COIL 2 CIRCUITSC = DX COIL 3 CIRCUITSD = DX COIL 4 CIRCUITS

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3

TECHNICAL SPECIFICATION: MAC200-600/YVC100-150

Models

IndoorUnit

MAC200 250 300 350 400 450 500 600

OutdoorUnit

YVC100 x 2 125 x 2 150 x 2 125 x 2 + 100 100 x 4 150 x 3 125 x 4 150 x 4

Nominal Capacities CoolingBtu/h 200,000 250,000 300,000 350,000 400,000 450,000 500,000 600,000kW 58.62 73.27 87.93 102.58 117.23 131.89 146.54 175.85

kcal/h 50,400 63,000 75,600 88,200 100,800 113,400 126,000 151,200

Power Supply V/Ph/Hz 380-415/3/50Ph 3 3 3 3 3 3 3 3

Power Consumption kW 21.89 25.13 31.97 35.95 42.94 49.45 53.23 66.91 Running Current A 44.92 50.26 56.40 74.50 87.90 86.91 109.30 117.58 Refrigerant Type R-22

Indo

or U

nit


Capacity step % 100-50-0 100-50-0 100-50-0 100-71-64-36-29-0 100-75-50-25-0 100-67-33-0 100-75-50-25-0 100-75-50-25-0

Cas

ing Meterial Electro Galvanized steel

Finishing Epoxy Polyester Power CoatingInsulation PE

Fan

Blower material Zinc coated steelType/Drive Centrifugal/Belt drivenBlower size (Diameter x Length) mm (inch) 381x381(15-15) 457x457(18-18) 457x457(18-18) 457x457(18-18) 502x410(20-16) 502x410(20-16) 502x410(20-16) 562x490(22-19)Blower pulley and bush mm 2SPZ/132/1610/25 2SPZ/170/2012/35 2SPZ/170/2012/35 2SPZ/224/2012/35 2SPA/236/2517/35 2SPA/236/2517/35 2SPA/280/2517/35 3SPA/280/2517/40Motor pulley and bush mm 2SPZ/80/1210/28 2SPZ/90/1610/28 2SPZ/95/1610/28 2SPZ/125/1610/38 2SPA/106/1610/38 2SPA/112/1610/38 2SPA/150/2012/42 3SPA/132/2012/42Air flow CFM 6,400 8,000 9,000 10,500 12,000 13,500 15,000 18,000ESP Pa 150 200 200 200 200 200 250 300 Motor type Squirrel cage inductionRated Running Current A 6.52 8.06 8.06 11.10 11.10 14.40 20.90 20.90Rated Output W 3,000 4,000 4,000 5,500 5,500 7,500 11,000 11,000Rated Input W 3,628 4,728 4,728 6,418 6,418 8,591 12,429 12,429Motor poles 4 4 4 4 4 4 4 4

Belt

Verticalair discharge

Motor-blower center mm 312 658 658 848 362 362 331 345V-belt size SPZ987 SPZ1687 SPZ1687 SPZ2240 SPA1207 SPA1207 SPA1250 SPA1357

Horizontalair discharge

Motor-blower center mm 296 626 626 817 314 314 291 -V-belt size SPZ950 SPZ1687 SPZ1687 SPZ2187 SPA1120 SPA1120 SPA1250 -

Coi

l

Tube Material Inner Groove Copper Tube

Diameter mm 9.5

Fin

Material AluminumThickness mm 0.105Circuit 2 2 2 3 4 3 4 4Row 4 4 5 4 4 4 5 6Fin per inch 12 14 12 12 14 14 12 12

Face Area ft2 12.06 16.04 17.76 24.65 27.88 27.88 27.88 36.49 Face velocity m/s 2.69 2.54 2.58 2.17 2.19 2.46 2.73 2.51

Dimension

Height mm 883 1,280 1,280 1,485 1,536 1,536 1,536 1,926Width mm 1,894 1,866 1,866 2,122 2,274 2,274 2,274 2,274Depth mm 936 1,130 1,130 1,130 1,448 1,448 1,448 1,873wooden casing mm 1025x2050x1080 1445x2016x1355 1445x2016x1355 1650x2277x1355 1715x2404x1630 1715x2404x1630 1715x2404x1630 2115x2450x2030

Control Thermostat expansion valveGross weight kg 244 368 378 438 556 570 610 920Noise level dBA 68.5 69.0 71.0 68.0 68.5 74.0 76.5 69.0Air Filter Not availableAir Filter size L×H×D mm 542×738×25.4 533×532×25.4 533×532×25.4 617×661×25.4 668×661×25.4 668×661×25.4 668×661×25.4 668×579×25.4

Pipe SizeLiquid inch 5/8” 5/8” 5/8” 5/8” 5/8” 5/8” 5/8” 5/8”Suction inch 1-3/8” 1-3/8” 1-5/8” 1-3/8” 1-3/8” 1-5/8” 1-3/8” 1-5/8”Drain inch 1-3/8”

Air Discharge Arrangement Factory setting Vertical Field setting Vertical/Horizontal Vertical

Out

door

Uni

t


Com

pres

sor

Qty 1 1 1 1 1 1 1 1 Compressor Type Scroll Capacitor µF - - - - - - - - Max. Starting Current A 125 x 2 125 x 2 175 x 2 125 x 2 + 125 125 x 4 175 x 3 125 x 4 175 x 4 Nominal Current A 19.2 x 2 22.1 x 2 24.17 x 2 22.1 x 2 + 19.2 19.2 x 4 24.17 x 3 22.1 x 4 24.17 x 4 Input Power W 9130 x 2 10200 x 2 13620 x 2 10200 x 2 + 9130 9130 x 4 13620 x 3 10200 x 4 13620 x 4 Vibration Isolator Rubber Protection Device Internal Over Load Protector + Phase protector

Fan

Qty / unit 1 1 1 1 1 1 1 1 Fan Type / Drive Propeller / Direct Drive Fan Speed rpm 930 920 920 930 / 920 930 920 920 920 Blade Material Aluminium Diameter mm 610 660 710 660 610 710 660 710 Rated Running Current A 1.5 x 2 2.8 x 2 3 x 2 2.8 x 2 + 1.5 1.5 x 4 3 x 3 2.8 x 4 3 x 4 Rated Output W 450 x 2 750 x 2 950 x 2 750 x 2 + 450 450 x 4 950 x 3 750 x 4 950 x 4 Rated Input W 710 x 2 1000 x 2 1250 x 2 1000 x 2 + 710 710 x 4 1250 x 3 1000 x 4 1250 x 4

Coi

l

Tube Material Inner Groove Copper Tube

Diameter mm 9.5

Fin

Material Aluminium Row 2 2 2 2 2 2 2 2 Fin per inch 14 14 14 14 14 14 14 14

Surface Area ft2 18.95 18.95 27 18.95 18.95 27 18.95 27

Casing Material Electro Galvanized SteelFinishing Epoxy Polyester Powder Paint

DimensionHeight mm 944 944 1,098 944 944 1,098 944 1,098Width mm 900 900 1,065 900 900 1,065 900 1,065Depth mm 972 972 1,107 972 972 1,107 972 1,107

Gross weight kg 158 166 220 166 / 158 158 220 166 220No. of circuit 1 1 1 1 1 1 1 1

Pipi

ng Pipe Size Liquid inch 5/8” 5/8” 5/8” 5/8” 5/8” 5/8” 5/8” 5/8”Suction inch 1-3/8” 1-3/8” 1-5/8” 1-3/8” 1-3/8” 1-5/8” 1-3/8” 1-5/8”

Connection Type Brazed

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PERFORMANCE TABLECOOLING CAPACITIES AND POWER REQUIREMENTS-SI

31 28 25 22 31 28 25 22 31 28 25 22

23 65.1 18.1 46 35 25 - 61.1 20.0 45 35 23 - 55.6 22.7 43 32 22 -

20 61.5 17.8 55 46 36 25 58.6 19.6 54 45 35 23 53.6 22.3 49 43 32 22

17 61.7 17.8 56 54 46 36 58.3 19.6 54 52 45 35 53.6 22.3 49 47 41 33

14 61.7 17.8 56 53 49 46 57.7 19.6 54 52 47 45 53.6 22.3 49 47 43 40

23 63.8 18.0 43 33 24 - 59.9 19.8 41 32 23 - 54.2 22.5 39 31 21 -

20 57.7 17.6 52 43 33 25 56.0 19.2 51 41 32 24 51.1 22.0 48 39 31 21

17 58.7 17.4 55 51 44 33 55.7 19.2 52 49 41 32 51.2 21.8 48 45 39 31

14 58.7 17.4 55 52 49 44 55.7 19.2 52 49 47 43 51.1 21.8 48 45 43 37

23 61.9 17.8 41 33 24 - 58.1 19.6 39 32 23 - 52.7 22.1 38 30 22 -

20 57.1 17.2 48 41 33 26 53.6 18.9 47 39 32 24 48.7 21.4 46 38 30 22

17 54.6 17.1 56 51 41 33 52.0 18.7 53 48 38 32 47.7 21.2 48 46 38 30

14 54.6 17.1 56 52 48 41 52.0 18.7 53 51 47 39 47.7 21.2 48 46 39 38

23 81.4 20.9 52 40 29 - 76.3 23.0 51 40 27 - 69.5 26.2 50 36 25 -

20 76.9 20.5 64 52 41 29 73.2 22.6 62 51 40 27 67.0 25.7 57 50 36 25

17 77.2 20.5 65 62 52 41 72.8 22.6 62 59 51 40 57.0 25.7 57 54 48 39

14 77.2 20.5 65 60 57 52 72.2 22.6 62 59 54 51 67.0 25.7 57 54 50 46

23 79.7 20.7 57 45 31 - 74.9 22.8 54 43 30 - 67.8 25.9 53 41 28 -

20 72.2 20.3 70 57 45 34 70.1 22.2 68 54 43 31 63.9 25.3 64 53 41 28

17 73.4 20.1 74 68 58 45 69.7 22.1 70 65 54 43 64.0 25.1 64 60 53 41

14 73.4 20.1 74 70 65 58 69.1 21.9 70 65 62 57 63.9 25.1 64 60 57 48

23 77.3 20.5 52 42 30 - 72.6 22.6 50 40 29 - 65.9 25.5 48 39 27 -

20 71.4 19.9 62 52 42 33 67.0 21.8 59 50 40 30 60.9 24.7 57 48 39 27

17 68.4 19.7 70 63 52 42 65.0 21.6 66 62 48 40 59.7 24.5 62 57 48 39

14 68.4 19.7 70 65 62 52 65.0 21.6 66 63 59 50 59.7 24.5 62 57 50 48

23 97.8 26.2 70 53 38 - 91.6 28.8 67 53 37 - 83.4 32.8 65 49 34 -

20 92.3 25.7 85 70 55 38 87.9 28.3 82 67 53 37 80.4 32.2 77 65 49 34

17 92.5 25.7 87 82 70 55 87.4 28.3 82 79 67 53 80.4 32.2 77 72 64 51

14 92.5 25.7 87 80 77 70 86.8 28.3 82 79 72 67 80.4 32.2 77 72 65 62

23 95.7 25.9 64 51 37 - 89.9 28.6 62 49 34 - 81.3 32.5 59 47 32 -

20 86.7 25.4 79 64 51 38 84.1 27.8 77 62 49 37 76.7 31.7 72 59 47 32

17 88.1 25.2 82 77 65 51 83.6 27.8 79 74 62 49 76.9 31.4 72 67 59 47

14 88.1 25.2 82 79 74 65 83.6 27.8 79 74 70 64 76.7 31.4 72 67 64 55

23 92.8 25.7 62 50 37 - 87.2 28.3 59 48 34 - 79.1 32.0 57 46 32 -

20 85.6 24.9 73 62 50 39 82.1 27.3 71 59 48 37 73.0 30.9 69 57 46 32

17 82.0 24.6 85 75 62 50 80.5 27.0 80 73 57 48 71.6 30.7 73 69 57 46

14 82.0 24.6 85 78 73 62 79.2 27.0 80 75 71 59 71.6 30.7 73 69 59 57

23 114.1 29.0 79 60 43 - 107.0 31.9 76 60 41 - 97.3 36.2 74 55 39 -

20 107.8 28.4 96 79 62 43 102.6 31.3 94 76 60 41 93.9 35.6 86 74 55 39

17 108.1 28.4 99 94 79 62 102.3 31.3 94 88 76 60 93.9 35.6 86 81 72 58

14 108.1 28.4 99 90 86 79 102.1 31.3 94 88 81 76 93.9 35.6 86 81 74 69

23 111.7 28.7 74 59 42 - 104.9 31.6 72 56 40 - 94.9 35.9 69 54 36 -

20 101.3 28.1 92 74 59 45 98.7 30.7 89 72 56 42 89.4 35.1 83 69 54 36

17 102.8 27.8 96 89 76 59 98.0 30.7 92 86 72 56 89.8 34.8 83 79 69 54

14 102.8 27.8 96 92 86 76 97.6 30.7 92 86 81 74 89.4 34.8 83 79 74 65

23 108.3 28.4 70 58 42 - 101.7 31.3 68 55 39 - 92.3 35.4 66 53 36 -

20 100.0 27.5 83 70 58 45 96.2 30.1 81 68 55 42 85.3 34.2 79 66 53 36

17 95.7 27.2 98 87 70 58 93.4 29.9 92 83 66 55 83.6 33.9 83 79 66 53

14 95.7 27.2 98 89 83 70 91.9 29.9 92 87 81 68 83.6 33.9 83 79 68 66

4.00

4.20

3.80

3.40

5.00

4.50

27 35 46

Entering Dry Bulb, °CTotal Cap., KW

Power Input

KW

Sensible Capacity, KWTotal Cap., KW

Power Input, KW

Entering Dry Bulb, °C Entering Dry Bulb, °C

Power Input,

KW

Sensible Capacity, KW

Air On Cooling Coil

Sensible Capacity, KW Total Cap., KW

Temperature of Air on Condenser

MAC250/2*YVC125

MAC300/2*YVC150

MAC350/2*YVC125+YVC100

MAC200/2*YVC100

3.00

2.70

2.40

3.80

3.40

3.00

M3/S WB˚C

NOTE: These capacities are gross ratings. For net capacity, determine the KW requirement of the supply air blower motor per the published BLOWER PERFORMANCE data. Convert KW to MBH per the following equation and deduct this equivalent heat from the gross cooling rating.

The KW input ratings listed above include the compressor and condenser fan motor (s).

Blower Motor KW × = Blower Motor Heat (M B H)3.415 MBH

KW

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COOLING CAPACITIES AND POWER REQUIREMENTS-SI

23 130.4 35.6 90 68 48 - 122.2 39.1 86 68 46 - 111.2 44.4 84 62 44 -

20 123.1 34.8 108 90 70 48 117.2 38.4 106 86 68 46 107.3 43.7 98 84 62 44

17 123.5 34.8 110 106 90 70 116.8 38.4 106 100 86 68 107.3 43.7 98 92 81 64

14 123.5 34.8 110 102 98 90 116.4 38.4 106 100 92 86 107.3 43.7 98 92 84 78

23 130.3 35.2 84 68 48 - 121.3 38.8 81 64 45 - 110.6 44.1 79 62 42 -

20 118.0 34.5 104 84 68 50 113.4 37.7 101 81 64 48 104.2 43.0 95 79 62 42

17 119.8 34.1 109 101 87 68 112.8 37.7 104 99 81 64 104.5 42.7 95 90 79 62

14 119.5 34.1 109 104 99 87 112.5 37.7 104 99 93 84 104.2 42.7 95 90 84 73

23 129.0 34.8 80 65 47 - 121.2 38.4 77 62 45 - 109.9 43.4 75 60 41 -

20 119.0 33.8 95 80 65 50 111.8 37.0 92 77 62 47 101.4 42.0 90 75 60 41

17 114.0 33.4 110 98 80 65 108.3 36.6 103 95 75 62 99.6 41.6 95 90 75 60

14 114.0 33.4 110 101 95 80 108.3 36.6 103 98 92 77 99.6 41.6 95 90 77 75

23 146.7 39.6 97 74 54 - 137.5 43.6 95 74 50 - 125.1 49.5 93 68 47 -

20 138.5 38.8 118 97 77 54 131.8 42.8 116 95 74 50 120.7 48.7 107 93 68 47

17 138.9 38.8 122 116 97 77 131.3 42.8 116 110 95 74 120.7 48.7 107 101 89 71

14 138.9 38.8 122 113 107 97 130.5 42.8 116 110 101 95 120.7 48.7 107 101 93 86

23 146.3 39.2 93 74 52 - 137.4 43.2 89 71 49 - 124.4 49.1 86 68 46 -

20 132.5 38.4 113 93 74 55 128.5 42.1 111 89 71 52 117.1 48.0 105 86 68 46

17 134.6 38.0 119 111 95 74 127.8 42.0 113 107 89 71 117.5 47.6 105 99 86 68

14 134.6 38.0 119 113 107 95 126.9 42.0 113 107 101 93 117.1 47.6 105 99 93 80

23 144.8 38.8 90 73 54 - 136.1 42.8 86 69 50 - 123.4 48.3 83 67 46 -

20 133.6 37.6 106 90 73 56 125.5 41.2 103 86 69 54 113.9 46.8 100 83 67 46

17 127.9 37.3 123 110 90 73 121.7 40.8 117 106 83 69 111.9 46.4 106 100 83 67

14 127.9 37.3 123 113 106 90 121.7 36.6 117 110 103 86 111.9 46.4 106 100 86 83

23 163.1 40.9 110 83 60 - 152.9 45.0 107 83 57 - 139.2 51.2 103 77 53 -

20 154.0 40.1 134 110 87 60 146.6 44.2 130 107 83 57 134.2 50.3 120 103 77 53

17 154.4 40.1 137 130 110 87 145.7 44.2 130 123 107 83 134.2 50.3 120 113 101 81

14 154.4 40.1 137 127 120 110 145.4 44.2 130 123 113 107 134.2 50.3 120 113 103 97

23 159.8 40.5 106 84 60 - 150.0 44.6 102 81 56 - 135.7 50.7 98 77 53 -

20 144.7 39.7 130 106 84 63 140.3 43.4 127 102 81 60 127.9 49.5 119 98 77 53

17 147.0 39.3 138 127 109 84 139.5 43.4 130 123 102 81 128.2 49.1 119 113 98 77

14 147.0 39.3 138 130 123 109 139.5 43.4 130 123 117 106 127.9 49.1 119 113 106 92

23 159.5 40.1 99 81 58 - 149.8 44.2 96 77 55 - 135.9 49.9 92 73 51 -

20 147.1 38.9 118 99 81 62 138.3 42.6 114 96 77 58 125.5 48.3 110 92 73 51

17 141.0 38.5 135 122 99 81 134.1 42.2 128 118 92 77 123.1 47.9 118 110 92 73

14 141.0 38.5 135 125 118 99 134.1 42.2 128 122 114 96 123.1 47.9 118 110 96 92

23 195.5 52.9 141 107 77 - 183.5 58.2 136 107 72 - 166.8 66.1 133 98 69 -

20 184.8 51.8 170 141 111 77 175.8 57.1 167 136 107 72 161.0 65.0 154 133 98 69

17 185.2 51.8 175 167 141 111 175.3 57.1 167 157 136 107 161.0 65.0 154 146 128 103

14 185.2 51.8 175 162 154 141 174.6 57.1 167 157 146 136 161.0 65.0 154 146 133 124

23 194.9 52.3 133 107 75 - 182.5 57.6 128 102 71 - 165.1 65.6 124 97 66 -

20 176.6 51.3 163 133 107 79 170.7 56.0 159 128 102 75 155.6 64.0 150 124 97 66

17 179.4 50.8 173 159 137 107 169.7 56.0 163 155 128 102 156.0 63.4 150 141 124 97

14 179.4 50.8 173 163 155 137 169.7 56.0 163 155 146 133 155.6 63.4 150 141 133 115

23 193.0 51.8 129 105 77 - 181.4 57.1 124 101 72 - 164.5 64.5 120 96 67 -

20 178.1 50.2 153 129 105 82 167.4 55.0 148 124 101 77 152.0 62.4 143 120 96 67

17 170.7 49.7 178 157 129 105 162.3 54.5 167 153 120 101 149.1 61.9 153 143 120 96

14 170.7 49.7 178 162 153 129 162.3 54.5 167 157 148 124 149.1 61.9 153 143 124 120

6.80

6.40

5.70

8.50

7.70

MAC600/4*YVC150

6.40

5.80

5.10

7.10

MAC500/4*YVC125

MAC400/4*YVC100

5.70

5.20

4.60

Entering Dry Bulb, °C Entering Dry Bulb, °C

Total Cap., KW

Power Input,

KW

Sensible Capacity, KW

Air On Cooling Coil

Temperature of Air on Condenser27 35 46

Total Cap., KW

Power Input, KW

Power Input

KW

Sensible Capacity, KWEntering Dry Bulb, °C

Sensible Capacity, KW Total Cap., KW31 28 25 22 31 28 25 22 31 28 25 22

M3/S WB˚C

450/3*YVC150




KW

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6

86 80 74 68 86 80 74 68 86 80 74 68

222 18.1 156 118 85 - 208 20.0 152 118 81 - 190 22.7 146 109 76 -

211 17.8 189 156 123 85 200 19.6 184 152 118 81 183 22.3 170 146 109 76

211 17.8 194 184 156 123 199 19.6 184 175 152 118 183 22.3 170 161 141 114

211 17.8 194 179 170 156 197 19.6 184 175 161 152 183 22.3 170 161 146 137

72

67

62

57

72

67

62

57

72

67

62

57

72

67

62

57

72

67

62

57

72

67

62

57

72

67

62

57

72

67

62

57

72

67

62

57

72

67

62

57

72

67

62

57

72

67

62

57

217 18.0 145 116 82 - 205 19.8 140 110 77 - 185 22.5 135 106 72 -

198 17.6 178 145 116 86 191 19.2 174 140 110 82 175 22.0 165 135 106 72

200 17.4 188 174 150 116 190 19.2 178 169 140 110 175 21.8 165 154 135 106

200 17.4 188 178 169 150 190 19.2 178 169 159 145 175 21.8 165 154 145 125

211 17.8 140 114 83 - 198 19.6 136 109 78 - 179 22.1 130 104 72 -

194 17.2 167 140 114 89 183 18.9 161 136 109 83 166 21.4 156 130 104 72

186 17.1 192 171 140 114 177 18.7 182 167 130 109 163 21.2 167 156 130 104

186 17.1 192 177 167 140 177 18.7 182 171 161 136 163 21.2 167 156 136 130

278 20.9 179 135 98 - 261 23.0 174 135 92 - 237 26.2 168 124 87 -

262 20.5 217 179 141 98 250 22.6 211 174 135 92 228 25.7 196 168 124 87

263 20.5 222 211 179 141 249 22.6 211 201 174 135 194 25.7 196 185 163 130

263 20.5 222 207 196 179 246 22.6 211 201 185 174 228 25.7 196 185 168 157

272 20.7 192 153 109 - 256 22.8 186 147 103 - 231 25.9 180 141 97 -

246 20.3 237 192 153 116 239 22.2 231 186 147 109 217 25.3 217 180 141 97

250 20.1 250 231 198 153 238 22.1 237 225 186 147 219 25.1 217 205 180 141

250 20.1 250 237 225 198 236 21.9 237 225 211 192 217 25.1 217 205 192 167

263 20.5 176 144 104 - 248 22.6 169 136 98 - 225 25.5 163 130 92 -

244 19.9 209 176 144 111 228 21.8 202 169 136 104 208 24.7 196 163 130 92

233 19.7 242 215 176 144 222 21.6 228 209 163 136 204 24.5 209 196 163 130

233 19.7 242 221 209 176 222 21.6 228 215 202 169 204 24.5 209 196 169 163

334 26.2 239 181 130 - 313 28.8 232 181 123 - 284 32.8 224 167 115 -

315 25.7 289 239 189 130 299 28.3 282 232 181 123 274 32.2 260 224 167 115

316 25.7 297 282 239 189 298 28.3 282 267 232 181 274 32.2 260 246 217 174

316 25.7 297 275 260 239 296 28.3 282 267 246 232 274 32.2 260 246 224 210

327 25.9 217 174 123 - 307 28.6 210 167 115 - 278 32.5 202 159 109 -

296 25.4 267 217 174 130 287 27.8 260 210 167 123 262 31.7 246 202 159 109

300 25.2 282 260 224 174 286 27.8 267 254 210 167 263 31.4 246 232 202 159

300 25.2 282 267 254 224 286 27.8 267 254 239 217 262 31.4 246 232 217 189

316 25.7 210 171 125 - 297 28.3 202 163 117 - 270 32.0 194 155 109 -

292 24.9 249 210 171 133 280 27.3 241 202 163 125 249 30.9 233 194 155 109

280 24.6 288 256 210 171 275 27.0 272 249 194 163 244 30.7 249 233 194 155

280 24.6 288 264 249 210 271 27.0 272 256 241 202 244 30.7 249 233 202 194

389 98.9 270 204 147 - 365 31.9 262 204 139 - 332 36.2 254 188 130 -

368 96.9 327 270 213 147 350 31.3 318 262 204 139 321 35.6 294 254 188 130

369 96.9 335 318 270 213 349 31.3 318 302 262 204 321 35.6 294 278 246 196

369 96.9 335 310 294 270 349 31.3 318 302 278 262 321 35.6 294 278 254 237

382 97.9 253 202 143 - 358 31.6 244 194 135 - 324 35.9 236 186 126 -

345 95.9 311 253 202 152 337 30.7 303 244 194 143 305 35.1 287 236 186 126

351 95.0 328 303 261 202 335 30.7 311 295 244 194 307 34.8 287 269 236 186

351 95.0 328 311 295 261 332 30.7 311 295 277 253 305 34.8 287 269 253 219

370 96.9 242 196 143 - 348 31.3 233 188 134 - 315 35.4 223 179 126 -

341 94.0 287 242 196 152 329 30.1 277 233 188 143 291 34.2 268 223 179 126

327 93.0 331 295 242 196 318 29.9 313 287 223 188 285 33.9 287 268 223 179

327 93.0 331 304 287 242 314 29.9 313 295 277 233 285 33.9 287 268 233 223

8000

7200

6400

MAC350/YVC100+2*YVC125

MAC300/2*YVC150

MAC250/2*YVC125

MAC200/2*YVC100

6400

5800

5200

CFM WB oFEntering Dry Bulb, oF Entering Dry Bulb, oF

Sensible Capacity, MBH Total Cap., MBH

Power Input,

KW

Sensible Capacity, MBH

Entering Dry Bulb, oF

Air On Cooling Coil


95oF 105oF 115oF

Total Cap., MBH

Power Input,

KW


Power Input,

KW

9450

8400

9000

8100

7200

10500

COOLING CAPACITIES AND POWER REQUIREMENTS-ENG




KW

J396_EN.indd 6 4/4/07 2:25:59 PM

7

86 80 74 68 86 80 74 68 86 80 74 68

445 35.6 304 231 165 - 418 39.1 295 231 156 - 380 44.4 286 211 147 -

420 34.8 368 304 240 165 399 38.4 359 295 231 156 366 43.7 332 286 211 147

421 34.8 378 359 304 240 398 38.4 359 341 295 231 366 43.7 332 313 277 221

421 34.8 378 350 332 304 397 38.4 359 341 313 295 366 43.7 332 313 286 267

444 35.2 287 230 163 - 414 38.8 278 220 154 - 378 44.1 269 211 143 -

403 34.5 355 287 230 172 387 37.7 345 278 220 163 356 43.0 326 269 211 143

409 34.1 374 345 297 230 386 37.7 355 335 278 220 357 42.7 326 306 269 211

407 34.1 374 355 335 297 383 37.7 355 335 317 287 356 42.7 326 306 287 249

441 34.8 273 223 162 - 413 38.4 263 212 151 - 375 43.4 254 202 142 -

406 33.8 324 273 223 172 381 37.0 314 263 212 162 347 42.0 304 254 202 142

389 33.4 374 334 273 223 370 36.6 355 324 254 212 340 41.6 324 304 254 202

389 33.4 374 344 324 273 370 36.6 355 334 314 263 340 41.6 324 304 263 254

500 39.6 335 253 183 - 470 43.6 324 253 172 - 427 49.5 314 232 162 -

473 38.8 405 335 263 183 450 42.8 394 324 253 172 411 48.7 364 314 232 162

473 38.8 415 394 335 263 448 42.8 394 375 324 253 411 48.7 364 344 304 243

473 38.8 415 385 364 335 445 42.8 394 375 344 324 411 48.7 364 344 314 293

499 39.2 314 252 178 - 469 43.2 304 241 168 - 425 49.1 293 230 157 -

453 38.4 388 314 252 189 438 42.1 377 304 241 178 399 48.0 357 293 230 157

460 38.0 409 377 325 252 436 42.0 388 366 304 241 400 47.6 357 336 293 230

460 38.0 409 388 366 325 433 42.0 388 366 346 314 399 47.6 357 336 314 273

494 38.8 307 250 181 - 464 42.8 295 239 170 - 421 48.3 284 226 158 -

456 37.6 363 307 250 192 428 41.2 352 295 239 181 389 46.8 341 284 226 158

437 37.3 420 374 307 250 415 40.8 397 363 284 239 382 46.4 363 341 284 226

437 37.3 420 386 363 307 415 36.6 397 374 352 295 382 46.4 363 341 295 284

556 40.9 376 284 205 - 523 45.0 365 284 194 - 474 51.2 353 262 182 -

526 40.1 456 376 297 205 500 44.2 444 365 284 194 458 50.3 410 353 262 182

528 40.1 467 444 376 297 498 44.2 444 421 365 284 458 50.3 410 387 341 273

528 40.1 467 433 410 376 497 44.2 444 421 387 365 458 50.3 410 387 353 330

545 40.5 360 288 205 - 511 44.6 349 277 192 - 463 50.7 336 264 180 -

494 39.7 444 360 288 216 479 43.4 432 349 277 205 437 49.5 408 336 264 180

501 39.3 468 432 372 288 475 43.4 444 421 349 277 438 49.1 408 385 336 264

501 39.3 468 444 421 372 475 43.4 444 421 396 360 437 49.1 408 385 360 313

545 40.1 338 276 200 - 511 44.2 325 263 187 - 464 49.9 313 251 175 -

503 38.9 401 338 276 214 472 42.6 389 325 263 200 428 48.3 376 313 251 175

482 38.5 463 413 338 276 457 42.2 438 401 313 263 421 47.9 401 376 313 251

482 38.5 463 426 401 338 457 42.2 438 413 389 325 421 47.9 401 376 325 313

668 52.9 481 365 263 - 626 58.2 466 365 247 - 569 66.1 452 335 233 -

631 51.8 584 481 379 263 600 57.1 568 466 365 247 549 65.0 524 452 335 233

632 51.8 598 568 481 379 598 57.1 568 540 466 365 549 65.0 524 496 437 350

632 51.8 598 554 524 481 595 57.1 568 540 496 466 549 65.0 524 496 452 423

665 52.3 452 362 257 - 623 57.6 438 347 241 - 563 65.6 423 331 226 -

602 51.3 559 452 362 271 582 56.0 543 438 347 257 531 64.0 512 423 331 226

612 50.8 588 543 468 362 579 56.0 559 528 438 347 533 63.4 512 483 423 331

612 50.8 588 559 528 468 579 56.0 559 528 498 452 531 63.4 512 483 452 392

659 51.8 440 359 262 - 619 57.1 425 343 245 - 562 64.5 408 327 228 -

608 50.2 522 440 359 277 572 55.0 507 425 343 262 518 62.4 490 408 327 228

582 49.7 604 539 440 359 554 54.5 572 522 408 343 509 61.9 522 490 408 327

582 49.7 604 555 522 440 554 54.5 572 539 507 425 509 61.9 522 490 425 408

Air On Cooling Coil


95oF 105oF 115oF

Total Cap., MBH

Power Input,

KW


Power Input,

KW


Power Input,

KW

Sensible Capacity, MBH

Entering Dry Bulb, oFCFM WB oF

Entering Dry Bulb, oF Entering Dry Bulb, oF

MAC400/4*YVC100

12000

10800

9600

13500

12100

10800

MAC450/3*YVC150

15000

13500

12000

MAC500/4*YVC125

18000

16200

14000

MAC600/4*YVC150

72

67

62

57

72

67

62

57

72

67

62

57

72

67

62

57

72

67

62

57

72

67

62

57

72

67

62

57

72

67

62

57

72

67

62

57

72

67

62

57

72

67

62

57

72

67

62

57

COOLING CAPACITIES AND POWER REQUIREMENTS-ENG




KW

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8

CAPACITY CORRECTION FACTORAt the different pipe length from design, the capacity of system will drop according to pipe length.

75

80

85

90

95

100

7 10 15 20 25 30 35 40Pipe Length (m)

Coo

ling

Cap

acity

Cor

rect

ion

Fact

or (%

)

MAC 200, 400

MAC 350

MAC 250, 500

MAC 300, 450, 600

5046

40

35

30

20

10

0

0 5 10 15 20 25 30

19

19 24

STD

OPERATING RANGE

Out

door

Tem

p. (°

C D

B)

Indoor Temp. (°C WB)

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9

MAC 300, 450, 600

DRIVE PACKAGE SELECTION EXAMPLE

For MAC 250, given conditions:Supply Air Quantity = 8000 CFMExternal Static Pressure = 200 Pa

Step 1:From blower performance curve find the velocity pressure (Hd).MAC250; blower 18-18, the velocity pressure at 8000 CFM supply air = 121 Pa

Step 2:Estimate coil pressure drop and unit pressure drop = 140Pa

Step 3:Find total external static pressure (Ht).Total external static pressure = External Static Pressure + velocity pressure + pressure drop = 200 Pa+121+140 Pa = 461 Pa

Step 4:Find fan operating speed and brake KW from blower performance curve of 18-18 a) Fan speed = 721 RPM b) Brake kW = 2.78 KW c) Motor kW = Brake KW × Safety factor (1.2) = 2.78 x 1.2 = 3.336 ≈ 4 KW

Step 5:Assuming change motor pulley only. Calculate motor pulley diameter (X)X= [Blower speed (RPM) × Blower pulley diameter (mm)] / Motor speed (RPM)Fix blower pulley diameter = 170 mm, Read from Motor and Blower Specifications table, a) Motor speed = 1438 RPM b) X = 721×170/1438 = 85.3 mmChoose 90 mm (the next pulley size which is bigger than 85.3 mm)

Step 6:Calculate V-Belt size; read from Motor and Blower Specifications table,V-belt length = 1.57(Ø blower pulley + Ø motor pulley) x 2 (length from center of two pulley) = 1.57(170+90) + 658 x 2 = 1724.2Select belt length 1737 (standard at vendor) and center point length can be adjusted.

Summary:Motor = 4 KWPulley = Ø90 * 2SPZV-belt size = 1737 mm

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10

BLOWER PERFORMANCE CURVE

15-15

Applicable area Gas Density 1.2 kg/m3

INNE

R PO

WER (K

W)Ni

no

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11

Gas Density 1.2 kg/m3

18-18


INNE

R PO

WER (K

W)Ni

no

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12

20-16


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13

Gas Density 1.2 kg/m3

22-19


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14

OUTLINE AND DIMENSION

MAC 200

MAC 250-300

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MAC 350

MAC 400-500

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16

MAC 600

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17

WIRING DIAGRAM

MAC 200/250/300

MAC 350/450

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18

MAC 400/500/600

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19

REFRIGERANT CIRCUIT DIAGRAMThe figure below show 2 refrigerant circuits, for 3-4 refrigerant circuits are similar.

SP.LCHRV CHRV

ID Coil Temp. 1

TXV BULB

TXV BULB

ID Coil Temp. 2

Return Air Temp.

SP.LF

SP.LCHRV CHRV

SP.L

TXVTXV

F

INSTALLATION AND SERVICEInstallation Procedure • Lift the outdoor unit (s) into position. • Fix the refrigerant pipe between indoor and outdoor units. • Fix the TXV bulb and insulate it. • Fix the indoor unit condensation drainage pipe • Test the refrigerant pipe on pressure and check leakage. • Insulate refrigerant pipe. • Draw a vacuum on the refrigerant system. Open all valves between the indoor and outdoor units. And add refrigerant oil and refrigerant. • Install the unit electrical system. • Check the electrical wiring.

Moving and LiftingBe very carefully while moving the units. Do not unpack until the units approach the installation location.The outdoor unit has four holes on its frame for lifting. Hook nylon ropes to the holes to lift the unit. The inclination angle should not exceed 150. Never lift other parts of the unit instead of its frame.The indoor unit has four installation brackets. Not hook ropes to the holes to lift the unit. You’d better use other plate to support the unit for hoisting, or use nylon ropes to across the unit body for hoisting.

Indoor

Outdoor

Blower Motor

Condenser Condenser

Compressor Compressor

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20

Installation Indoor and Outdoor UnitIndoor Units Installation

The distance between the side and the sidewall cannot be less than 1 meter. In horizontal installation, ceiling hooks should be prepared for lifting the unit; in vertical installation, fix the unit on the floor with bolts. Apply rubber cushions between the frame and its support to reduce vibration. The unit should be installed level, and the drain pan should be kept clean. The indoor unit causes noise while operating, so it should be installed in a place where noise does not bother people very much, in a room close to stairway, elevator or toilet, for example. A good way to abate noise is to build a wall to isolate the machine from air-conditioned rooms, and close all doors and windows of the unit room.Therefore, the unit room should apply a return air system. To fix the return air piping, angle pipes should be prepared on site. Besides, you ought to prevent noise from entering air-conditioned rooms through the return air entrance.

Outdoor Units InstallationThe units can be installed on a proper ground or roof. The unit should be installed level with enough air volume. In order to let airflow enter the condensation coil freely and without hot return air, you should have sufficient space reserved when install the outdoor unit, as below table and figure shows. Otherwise, airflow to the coil will get restrained, or discharge air will return. Consequently there will be a capacity loss, power consumption will increase, and malfunction may occur. Tall buildings around the unit may create downdraft affecting air discharge. Outdoor fan is an axial flow fan, which does not fit an air pipe. Avoid installing the outdoor unit right below a window or between constructions, otherwise, noise caused by unit operation will go indoors. If the unit can be easily approached by persons without permission, measures should be taken to protect it, for example, setting up a fence. This will prevent the unit from sabotage or accidental damage, and protect the control box from being opened and electrical components being exposed. Always leave enough space between several outdoor units to benefit their normal operation and your maintenance.

Adjust the fin heat exchanger of the outdoor unit away from direct sunshine. Do not install the unit in places full of dead leaves, insects or contaminations in case the heat exchanger is clogged up. Ensure that the unit is set up level; the fan and compressor can operate normally. Never install the unit in places easy to catch fire and explode; be sure that no poisonous and dangerous substance, such as oil steam or sulfur, exists in surrounding atmosphere; keep the unit away from boiler flue or any environment that can cause fin coil and other copper components to corrode. If install the unit in places easy to be contaminated, you have to do more maintenance work.

The unit can be fixed on any flat surface that can hold 400 kg/m2 pressure, no special pedestal needed. Whether on roof or ground, rubber cushions should be applied between the unit frame and its support to reduce vibration.

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21

Installation clearance for YVC

A - Space for air flowB - Space for serviceC - Space for air discharge

Maximum pipe length and maximum number of bends When the pipe is too long, the required refrigerant quantity increases. Both the capacity and reliability drops as a result. As the number of bends increases, system-piping resistance to the refrigerant flow increases, thus lowering the cooling capacity and the compressor may become defective. If the height difference between the evaporator and the condenser is excessive, the cooling capacity drops, the lubricating oil return is retarded, affecting the compressor efficiency adversely.

Model YVC 100/125/150 2xYVC 100/125/150 3xYVC 100/125/150 4xYVC 100/125/150A (mm) 500 600 600 600B (mm) 400 1000 1000 1000C (mm) 1,200 1,500 2,000 2,000

Model Max. Elevation Max. Total Length Max. of Bends

m (ft.) m (ft.)YVC100 20 (65.6) 35 (115) 8YVC125 20 (65.6) 35 (115) 8YVC150 20 (65.6) 35 (115) 8

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22

Adding Lubricant Oil and Refrigerant

If the connection pipe is longer than 10 meters, the extra filling amount will be calculated according to the table below based on the pipe’s extra length.

Extra suction pipe length (inch) g/m Extra liquid pipe length

(inch) g/m

1-1/8” 13 5/8” 1681-3/8” 19.5 −− −−

Lubricant oil filling amount in each refrigeration circuit is based on the following table.

YVC 100/125 YVC 150Vertical pipe for every 10 meters 200 ml 150 mlHorizontal pipe for every 10 meters 100 ml 80 ml

MAINTENANCE • Air Filter According to specific environment conditions, the air filter is often fixed at a return air entrance, to effectively screen soot, dust, dirt, farina and other matters. The air filter is usually made of nylon or leno fiber, and can be washed with water. When cleaning it, lay it on a solid place and knock it lightly to remove dusts from its surface. If necessary, wash it with neutral detergent in warm water, and dry it before fix it back. The air filter can be fixed and removed conveniently, for it can be taken out from all sides of a unit. • Belt The indoor unit is driven by belt(s). After the unit works for some time, adjust the belt tension. • Heat exchanger Use a vacuum cleaner and a nylon brush to clean up the heat exchanger. If there is a compressed air source available, blow off the dust from the exchanger surface with compressed air. You should note that with a proper air filtering net and sufficient maintenance, there is no need to wash the indoor exchanger’s surface. However, the outside heat exchanger should be washed and cleaned regularly.

Maximum Allowable Piping Length & Elevation Difference

MAX

. ELE

VATI

ON

HEI

GH

T

INDOORUNIT

MAX

IMU

M P

IPIN

G

MAX

. ELE

VATI

ON

HEI

GH

T

INDOOR UNIT

MAX

IMU

M P

IPIN

G

20m

20m

INDOOR UNIT

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23

• Drainage Pipe Before start the units, check if the drainage pipes are clogged, and ensure that the condensate water can smoothly flow out. • Components Replacement You can get parts and accessories from the nearest YORK representative office or an authorized YORK dealer. The following items should be noted when you want some new components. 1) Unit model; 2) Unit series number; 3) Accessory name and required amount.

• Fan Installation and Adjustment The fan rotating rate is subject to the air volume required by the units, the unit components and the resistance in return air pipe. Based on the demanded air volume and the total static pressure, according to the performance curve, you can make out the fan-rotating rate. With the rotating rates of fans and motors, you will know to use what kind of belt pulleys. The fan-rotating rate can be adjusted by changing belts or pulleys. This will change the indoor unit’s air volume and residual pressure. To replace belts and pulleys on site, please see the following picture and find their correct positions.

• Belt Adjustment If the belt is not tight enough, the friction between belt and pulleys may become weak and can hardly drive the fan to rotate. As a result, the air volume and residual pressure will become insufficient, and unit performance will be affected seriously. However, if the belt is too tight, the fan or the motor bearings will be worn out more quickly, and the fan or the motor will have lower performance and shorter operating life. Too loose or too tight belts are harmful to the units and will make the noise louder. Readjust the belt tension after a week of trial operation. And then, check the belt every 1 or 2 months to ensure that the tension is suitable. Otherwise, make some adjustment or replace the belt. When use a new belt, in the first 24 hours of operation, check its tension at least twice.

• Safety The installation and maintenance of the air conditioning system should be performed by well-trained professionals. Regular maintenance, such as coil and air filter cleaning, is necessary for a normal operation of the units.

Four key ways

Use ruler on site

A B C D

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24

OPERATION

1. Cooling System DescriptionMAC, a cooling only ducted split system has 200, 250, 300, 350, 400, 450, 500, 600 MBTU series. Series 200, 250, 300 are dual refrigerant circuits system comprise of one indoor unit and two outdoor units. Series 350, 450 are three refrigerant circuits system comprise of one indoor unit and 3 outdoor units. Series 400, 500, 600 are four refrigerant circuits system comprise of one indoor unit and 4 outdoor units. Second phase of YIT design is merely for indoor unit only. Outdoor unit is the different combination of existing YCV100, YCV125 and YCV150. The current development is for cooling only model.The outdoor unit for each model consists of one compressor and one axial fan.

● Indoor and outdoor unit matching as follow:

Indoor unit Outdoor unit No of outdoor unit Remarks

1 MAC200B2 YCV100 2 2 cooling circuits2 MAC250B2 YCV125 2 2 cooling circuits3 MAC300B2 YCV150 2 2 cooling circuits

4 MAC350B3 YCV100 1 3 cooling circuitsYCV125 25 MAC400B4 YCV100 4 4 cooling circuits6 MAC450B3 YCV150 3 3 cooling circuits7 MAC500B4 YCV125 4 4 cooling circuits8 MAC600B4 YCV150 4 4 cooling circuits

2. System Operation

Cooling model ducted units required Cool and Fan mode operation only. System enters into standby mode upon power on. During standby mode, the operation mode can be changed via Mode button and it will be indicated accordingly.Cool model: Cool—FanDefault setting: Cool mode, high fan, 24°C

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25

3. Analogue Input

No Analogue input Measuring rangeand description Fault Management

1 AI1: Return air temperature

-40~80°C Consider as fault if

exceeding the range

Use for capacity regulation. Should there be fault occurred, treat it as default 26° and system operates with fault tolerance. Indicates the fault in Fan mode but no effect on the operation.

2 AI2: Indoor coil 1-40~80°C

Consider as fault if exceeding the range

Use for indoor coil anti freeze. Checking is done in cool mode [bypassed for the first 3 minutes upon compressor cut in]. Should there be fault occurred, the compressor will stop for 10 minutes after running 30 minutes continuously. Indicates the fault in Fan mode but no effect on the operation.



Same as above.



Same as above. Can be bypassed by DIP switch setting.



Same as above. Can be bypassed by DIP switch setting.

Remarks: The on board DIP switch is used to select the number of outdoor unit.

4. Digital Input

No Description Type Function Remarks

DI01Indoor fan, power failure, external interlock failure protection

Contact: Close OK System protection 1 sec confirmation time

DI02Compressor 1 fault, highpressure 1 fault, low pressure 1 fault, outdoor fan 1 fault

Contact: Close OK For system 1# protection 1 sec confirmation time







DI06 Remote On/Off

Contact:Close:Allowedsystem tooperate.

For system On/Off control.

Open: Standby

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26

5. Digital Output

No Description Type Function RemarksDO01 Indoor fan Contact: Close output Control indoor fan operation 400V-3Ph-50Hz

DO02 Compressor 1 and outdoorfan 1 Contact: Close output Control compressor 1 and

outdoor fan 1 operation


outdoor fan 2 operation


outdoor fan 3 operationCan be selected by DIP switch setting


outdoor fan 4 operationCan be selected by DIPswitch setting

DO06 Tio2 Contact: Close output Control Tio2 operation

6. Functional6.1 System on sequence

NO Cool mode on sequence Remarks1 Wallpad on

2 External interlock (remote on/off) contact close Should the contact is opened, system enter into standby mode.

3 Turn on indoor fan, delay 15 sec Should there be indoor fan failure, indoor fan cannot be turned on and system enters into standby mode.

4 Check return air temperature, delay 15 sec. If loading is not required, continue checking.

5 Turn on compressor Use equal loading logic to turn on the compressor with the shortest cumulative run time.

6 Check for loading requirement If further loading is required, proceed with loading control.7 On cycle completed

NO Fan mode on sequence Remarks1 Wallpad on

2 External interlock (remote on/off) contact close Should the contact is opened, system enters into standby mode.

3 Turn on indoor fan, delay 15 sec Should there be indoor fan failure, indoor fan cannot be turned on and system enters into standby mode.

4 On cycle completed

6.2 System off sequenceNO Cool mode on sequence Remarks1 Wallpad off or remote on/off contact open2 Off compressor 1 If compressor 1 is not running, jump to step 43 Delay 3 sec4 Off compressor 2 If compressor 2 is not running, jump to step 65 Delay 3 sec6 Off compressor 3 If compressor 3 is not running, jump to step 87 Delay 3 sec8 Off compressor 49 Delay 30 sec

10 Off indoor fan11 Off cycle completed

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27

NO Fan mode off sequence Remarks1 Wallpad off or remote on/off contact open2 Off indoor fan3 Off cycle completed

6.3 Capacity RegulationIn normal operation (no system fault and antifreeze protection), system operates as follow:

6.3.1 Cool mode operation: Compressor operation is according to fuzzy logic control.Outdoor fan is running in tandem with compressor. Any compressor is running, its correspondence outdoor fan will cut it and vice versa.Temperature set range is 16-30°C, default at 24°C.Regulation fuzzy control is divided into cut in, loading, status quo, unloading, cut out and emergency stop section.

Regulation section Cool mode DescriptionCut in Tr≥Ts+1.5°C Turn on the first compressor at no load condition is considered

as Cut in.Loading Tr≥Ts+1°C Turn on more than one compressor is considered as LoadingStatus quo Ts+0.5°C≥Tr≥Ts-0.5°C No regulation is done. No compressor start/stop operationUnloading Tr ≤Ts-1°C Off load more than one compressor according to the thermostat

control cycleCut out Tr ≤Ts-1.5°C Off load the last compressor according to the thermostat control

cycleEmergency stop Tr ≤Ts-2°C Off load all active compressors within a short interval

Note:1) Each thermostat regulation cycle is 90 sec. It will reduce to 6 sec in emergency stop control section.2) Tr—— actual return air temperature, Ts——set return air temperature3) Fan mode: Stop compressor and outdoor fan, only indoor fan running.

6.3.2 Indoor fan controlShould there be no indoor fan fault, indoor fan will run when system is turned on. Outdoor fan is allowed to cut in 15sec after indoor fan running. Indoor fan is allowed to stop after all outdoor fans have stopped. Indoor fan continuenormal running after compressor is stopped due to unloading control.

6.3.3 Equal loadingCompressor that has the shortest cumulative run time will turn on first during loading control.Compressor that has the longest cumulative run time will turn off first during unloading control.

6.3.4 Compressor frequent cut in preventiona. Compressor consecutive cut in interval, default 5 min (Programmable 3-8 min)b. Compressor anti short cycle timer, 3 minc. Compressor minimum run time during thermostatic control, 1 min.

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28

6.4 TiO2 controlUse TiO2 button to control TiO2 on/off.When unit is in standby mode, activation of TiO2 will activate the indoor fan as well.

7. Fault ManagementThe control system satisfied the following control requirements: 1.) Indoor fan protection: Check the indoor fan protection input when system is on. Should the contact be opened, indicates the indoor fan fault and unit is not allowed to operate. If the failure occurre when indoor fan is running, indicates error and stop indoor fan and outdoor unit operation. It needs manually restart the unit. 2.) Compressor, outdoor fan, high pressure, low pressure protection: Should the contact be opened for 1 sec when the system is running, indicates error and stop the faulty circuit. S Note: ● The first high or low pressure failure happened after every system on cycle, is allowed to auto reset provided the pressure contact has returned to healthy position. The subsequent failure will cause the alarm symbol flashing even though the contact has recovered. It can be cleared by pressing reset button. Faulty compressor is allowed to recover after reset. If high or low pressure failure happens 5 times consecutively on the same compressor for every system on cycle, pressing of “RESET” button is not allowed to recover the faulty circuit. It needs to cut off the power supply and on again to restart. ● The faulty circuit will not affect the operation of the remaining circuits. 3.) Anti freeze: In cool mode, if indoor coil temperature < 0°C (Programmable -10~2°C) for 300 sec continuously, stop the faulty circuit and indicates error. Indoor fan continue to operate as normal. When indoor coil temperature } 12 °C for 30 sec, it will auto recover and cut in should the loading conditions be met. 4.) Cooling failure protection: In cool mode, if any of the compressor has run more than 30 min continuously and its indoor coil temperature > 24°C for 5 min, stop the faulty circuit and indicates error. It needs to cut off the power supply and on again to restart. 5.) Sensor failure protection: ◆ If sensor open or short circuit, indicates error and operates with fault tolerance conditions. ◆ Indoor coil sensor fault: In cool mode, system will bypass the antifreeze and cooling failure protection of the affected circuit. It will stop for 10 min after running continuously for 30 min. The next cut in will be determined by the capacity regulation fuzzy control logic. ◆ If return air sensor failure, it will take the return air as default 26°C. ◆ Bypass sensor and system fault checking in fan mode.

8. Local/Remote On/OffUse DIP switch to select Remote On/Off control option. All the protections are still valid in this control option. Contact close: System on, contact open: System off. When this DIP switch is set, system will operate according to the wallpad last settings. Wallpad can then be removed or remain connected but no key press response as it is used for system operation status indication only. If remote off, unit will stop and no operation is allowed on wallpad.

9. System PID Drawing (Example: Dual circuit)18 21

09

10

17

34

05

0922

01 0203

31 32

04 06

33

16

08

07

20

15

SP.HCHRV CHRV

ID Coil Temp. 1

ID Coil Temp. 2

Return Air Temp.

SP.LCOMF

SP.HCHRV CHRV

SP.LCOM

TXVTXV

F

Indoor

Outdoor

Indoor

Outdoor

CondenserCondenser

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29

10. Wallpad10.1 Wallpad Dimension, Figure 1

120mm

88m

Figure 1

10.2 Button/key Description (Details refer to operation guide) Figure 2

DAY: Set day of weekTIME+/-: Adjust clockCLOCK: Set clockCANCEL: Cancel timerTIMER: Set on/off timer

Figure 2MODEL: Set operation modeSET: Set parameterDISPLAY: Browse temperatureSELECT+/-: Menu selection

RESET: Reset faultTiO2: TiO2 on/off

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10.3 LCD Display Description Figure 3

Figure 3

A. Return air or set temperature display section. This section has no indication if system in standby mode and backlight is off. B. Wallpad key lock symbol. Symbol appears if wallpad keypad is locked and vice versa. C. Compressor status indication. Symbol will light up if its corresponding compressor is running. D. Day display from Monday to Sunday E. On/Off timer setting symbol. During on/off timer setting mode, this symbol and F or G symbol flashing. In none timer setting mode, this symbol will light up should there be any on/off timer being set. F. Off symbol. During off timer setting mode, this symbol and D symbol flashing. In none off timer setting mode, this symbol will light up should be unexecuted off timer for the current day. G. On symbol. During on timer setting mode, this symbol and D symbol flashing. In none on timer setting mode, this symbol will light up should be unexecuted on timer for the current day. H. Clock display. In temperature browsing mode, it shows the temperature being searched. In parameter setting mode, it shows the set parameter. I. It shows the error code if there is system failure. It shows the menu number in temperature browsing or parameter setting mode. J. Error symbol flashes if there is system failure and vice versa. K. Indoor fan status indication. This symbol lights up if indoor fan is running and vice versa. L. TiO2 status indication. This symbol lights up if TiO2 is on and vice versa. M. Symbol lights up in Fan mode and vice versa. N. Symbol lights up in Cool mode and vice versa. O. Symbol flashes in temperature setting mode.

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10.4 Wallpad Operation Guide

10.4.1 On/Off ControlPress button to control the system on/off. If the unit is off, press will turn on the system with two beeping sounds. If the unit is on, press to turn off the unit with one beeping sound.

10.4.2 Temperature SettingPress or button to adjust the temperature setting from 16ºC to 30ºC.

10.4.3 Mode SettingPress <MODE> button to select Cool or Fan mode.

10.4.4 Clock SettingSystem has an inbuilt real time clock for time indication and on/off timer control. Press <CLOCK> button to enter into clock setting mode and second indication stop flashing. Press: TIME+/- button to adjust the system clock. Press <CLOCK> button once more to exit the clock setting mode. Second indication resumes flashing.

10.4.5 Day SettingThis wallpad supports the day indication. Day indication can be used for normal day display and on/off timer setting. Day display section shows the current day. Use the <DAY> button to adjust the day setting accordingly.

10.4.6 On/Off Timer SettingThe system supports 7 groups of on/off timer setting, ie 7 days weekly timer. a) Press <TIMER> button once, timer symbol flashes. Press <TIMER> button again, timer and On symbols flashing, system is now in on timer setting mode. The day display section shows the day of the corresponding on timer setting. If clock display section shows --:--, it means the current timer is null. Pressing <TIME+/-> button will activate this timer. If there is time being displayed, it means the current timer is already activated. Press < TIME+/-> button to adjust the timer setting. Press <CANCEL> button will cancel this setting and the display will be shown as --: --. b) Press: <TIMER> button again, On symbol is off while timer and Off symbols flashing, system is now in on timer setting mode. The day display section shows the day of the corresponding off timer setting. If clock display section shows --:--, it means the current timer is null. Pressing <TIME+/-> button will activate this timer. If there is time being displayed, it means the current timer is already activated. Press <TIME+/-> button to adjust the timer setting. Press <CANCEL> button will cancel this setting and the display will be shown as --:--. c) Press <TIMER> button again, Off symbol off and timer symbol flashing. Pressing <CANCEL> button will exit on/off timer setting. d) Press <TIMER> button again to repeat steps a) to b). e) Press <DAY> button to adjust different day of on/off timer setting. f) In normal operation, timer symbol will light up should there be any on/off timer being set. Should there be unexecuted on or off timer for the current day, its corresponding On or Off symbol will light up. g) In on/off timer setting mode, pressing <CANCEL> button for 5 sec will cancel all on/off timer settings.

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10.4.7 TiO2 ControlPress <TiO2> button to start or stop TiO2 control. If TiO2 is off, press <TiO2> button to activate TiO2. If TiO2 is activated, press <TiO2> button to off TiO2.

10.4.8 Temperature BrowsingIn normal operation, press <DISPLAY> button to enter into temperature browsing menu. Press <SELECT5/∞> button to select the menu as follow:

Menu Shown in errorcode display section

Value Shown clock display section Unit Remarks

C0 Main board DIP switch setting Unit Shows number of outdoor unitconnected

C1 Indoor coil 1 temperature ºCC2 Indoor coil 2 temperature ºC

C3 Indoor coil 3 temperature ºC If main board is configured as dual circuits, C3 and C4 cannot be selected.

C4 Indoor coil 4 temperature ºC If main board is configured as three circuits, C4 cannot be selected.

Press <DISPLAY> button again to exit.

10.4.9 KeylockSystem is equipped with keylock function to prevent mischief. Press and buttons for 5 sec to activate keylock mode. Keylock symbol will light up, likewise to exit keylock mode.Only button will be responded in keylock mode.

10.4.10 Key ValidityThere are some buttons that will be acknowledged in certain function only. The valid key press will be responded with the beeping sound.

10.4.11 Parameter SettingIn normal mode, press <SET> button for 5 sec to enter into parameter setting menu. Press <SELECT5/∞> button the select the menu. Press or button to edit the parameter as follow:

Menu Shown in errorcode display section

Parameter Shown clock display section Unit Remarks

d0 Recover to the state before power failure.

Display as En: Recover Display as Dn: Not recover

d1 Service password 1 0~99, default 0d2 Service password 2 0~99, default 0d3 Indoor coil antifreeze -10~2°C, default 0°C

d4 Compressor consecutivecut in interval 3~8 min, default 5 min

d5 Thermostatic control cycle 30~240 sec, default 90 sec 30 sec / step

d6 Recover to default setting Display as En: Recover Display as Dn: Not recover

Note: 1. Upon enter to parameter setting menu, “READ” wording will be shown, indicates retrieving the data from the main board. 2. At menu d1, a password of “16” is required to proceed to menu d2. If the password is incorrect, system will exit parameter edit mode. 3. At menu d2, a password of “32” is required to proceed to menu d3. If the password is incorrect, system will exit parameter edit mode. 4. Upon completion of parameter editing, press <SET> button to exit in order for the new settings to take effect.

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10.4.12 Error DisplayShould there be error occurred, backlight will turn to red color. Error display section shows the corresponding error code as follow:

Error Code Description Remarks

1 Indoor fan failure (power off to reset) Display error, stop the system for protection. Power off and on to restart.

2 Indoor return air sensor failure (auto reset) Display error, resume upon recovered, default at 26°C.

3 Indoor coil 1 sensor failure (auto reset) Display error, system continue to operate, bypassed antifreeze.




7Outdoor unit 1 power protection, outdoor fan protection, external interlock, compressor 1 high/low pressure failure (manual reset)

Display error, stop the outdoor unit, manual reset required, should the failure be occurred 5 times consecutively, pressing of “RESET” will not be able to reset the unit. Needs power off and on to restart the unit.

8 Indoor coil 1 anti freeze (auto reset) Display error, stop the unit.9 Circuit 1 no cooling (power off to reset) Display error, stop the unit.



11 Indoor coil 2 antifreeze (auto reset) Display error, stop the unit.12 Circuit 2 no cooling (power off to reset) Display error, stop the unit.







Note:1. Failure of any circuit will not affect the operation of other circuits.2. During system failure, press <RESET> button for 3 sec to reset the fault.

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10.4.13 Hardware Manual Test Mode (valid with first 60 sec upon power on)This function is used to check if the main board inputs and relay outputs are healthy. It is also used to check if there is any fault on the wallpad buttons and display. Wallpad testing: Hold down and buttons and power up the unit to enter into test mode. All LCD symbols will light up. System will respond with one beeping sound for any key press and the backlight will change to next color (Red, Yellow, Blue). Main board testing: Upon wallpad enter into test mode, pressing of any button will trigger the wallpad to send a test command to the main board. Should there be no communication failure, main board will enter into test mode operation as table below. System will exit from test mode automatically 1 min later.

Main board hardware testing:Step Operation Main board status description

1 Wallpad enter into hardware test mode Off all relays2

Send test command upon pressing of any button.Note: Wallpad send test command once to main board upon pressing of any button.Upon received the test command, main board blinks the communication LED once.

Relay 1 (DO01) on3 Relay 1 off, relay 3 on (DO03)4 Relay 3 off, relay 3 on (DO05)5 Relay 5 off, relay 3 on (DO07)6 Relay 7 off, relay 3 on (DO09)7 Relay 9 off, relay 11 on (DO11)8 Off all relays

9

Test op to couple. Note: Relay off if op to coupler is conducted and vice versa.DIO2 versus OPT9, indicated by relay 1DIO4 versus OPT11, indicated by relay 3DIO6 versus OPT1, indicated by relay 5DIO8 versus OPT3, indicated by relay 7DI10 versus OPT5, indicated by relay 9DI12 versus OPT7, indicated by relay 11

10 Off all relays and return to step 2

TROUBLESHOOTINGSymptoms Causes Solutions

High pressure protection

• Air sneaks in the refrigerant system• Too much refrigerant• Condensation coil too dirty• Insufficient condensation air volume• Liquid pipe clogged.• High-pressure switch malfunction

• Draw a vacuum once more, and recharge the refrigerant.• Let out the redundant refrigerant.• Clean up the condensation coil.• Check the outdoor unit for air flowing problems when the system in cooling mode• Check the drying filter and the expansion valve for liquid flowing performance.• Replace it.

Discharge temperature protection.

• Condensation pressure too high• Suction temperature is too high• Motor too hot

• Check the cause and settle the problem.• Evaporator liquid supply is insufficient: refrigerant leaking or tube clogged.• Lubricating problem

Exhaust air temperature too low • Air suctioned with liquid • Find the cause and settle the problem.

Low pressure protection

• Refrigerant insufficient or leaking• Evaporating coil too dirty• Evaporating coil seriously frosting• Insufficient evaporating air volume• Suction pipe clogged• Liquid pipe clogged• Low-pressure switch malfunction

• Search for holes, and refill the refrigerant.• Clean the coil.• Check if the defrosting function is normal.• Check the indoor unit for air flowing performance when the systems in cooling mode• Find the cause and settle the problem.• Check the drying filter and expansion valve for liquid flowing performance.• Replace it.

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Compressor abnormal noise • Lubricating problem • Check the cause and settle the problem.

Air switch trip • Short Circuit • Check if the wires have short-circuited and the motor coil has burnt.

Compressor overheat-ing protection

• Discharge pressure too high• Insufficient suction volume• Lubricating problem• Axis or cylinder seized and blocked

• Find the cause and settle the problem.• Find the cause and settle the problem.• Replace the compressor.

Temperature sensormalfunction protection • Temperature sensor malfunction • Replace the temperature sensor.

Insufficient cooling

• Refrigerant insufficient or leaking• Air filter too dirty• Heat exchanger too dirty• Belt slipping• Compressor malfunction• Insufficient liquid supply of the thermo expansion valve• Fan reverse rotation• Temperature sensor error

• Search for holes, and recharge the refrigerant.• Clean it.• Clean it• Adjust belt tension; if fail, replace it.• Find the cause of insufficient discharge volume and settle the problem.• Adjust or replace it.• Adjust it to the right direction.• Replace it.

Units refuse to work

• Power off or fuse burnt• Incorrect wiring• Low voltage• Wrong phase order• Forget to reset after a failure

• Check the power circuit, or replace the fuse.• Check and correct the wiring according to the electrical diagrams.• Check and wait until the power returns to normal.• Change the phase.• Press the reset button.

Fan works, but com-pressor doesn’t work

• Thermostat setting too high• Dual pressure control trip• Compressor faulty• Compressor contactor faulty

• Reset thermostat• Reset Pressure Control• Contact local dealer• Contact local dealer

Indoor unit water leakage

• Heat insulation broken, or dew generated.• Units not installed level• Drain pipe clogged• Drain pipe joints not tight• Wrong drain pipe route

• Repair the heat insulation cotton• Adjust the indoor unit.• Clean the drain pan and drain pipe.• Fasten and seal the joints• Redesign the drain pipe.

Abnormal operation noise

• Some foreign impurity in units or fan• Unstable installation or loose bolt

• Remove it.• Adjust the units and fasten the bolts.

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