reversible chiller - wrl 200-400-500 - aermecaermec.us/products/watertowater/wrl/technical...

Certificate No. U8131286304002

Tested according to: UL 1995:2011

REVERSIBLE CHILLER - Technical Manual

IWRLPY. 1403. 5890710_01

EN

WRL 200-400-500WATER/WATER CHILLER

• HIGH EFFICIENCY• MAXIMUM WATER OUTLET TEMPERATURE 55°C/131°F• DESUPERHEATER• SUITABLE FOR GEOTHERMAL APPLICATIONS

AERMEC S.p.A. reserves the right at all times to make any modification for the improvement of its product and is not obliged to add these modification to machines of previous manufacture that have already been delivered or are being built.

Dear customer,Thank you for choosing AERMEC. It is the fruit of many years of experience and special design stud-ies and has been made of the highest grade materials and with cutting edge technology.The quality level is being constantly monitored, so AERMEC products are synonymous with Safety, Quality and Reliability.

The data may undergo modifications considered necessary for the improvement of the product, at any time and without the obligation for any notice thereof.

Thank you again.AERMEC S.p.A

Summary

1. General warnings ...................................................................41.1. Preservationofthedocumentation ....................................... 41.2. Installation ..............................................................................41.3. Warranty ................................................................................41.4. Warningsregardingsafetyandinstallationstandards ...........4

2. Productidentification ............................................................. 42.1. Technicalplateposition .......................................................... 4

3. Presentation ...........................................................................5

4. Ceck list ..................................................................................54.1. Descriptionandchoiceoftheunit ......................................... 6

5. Descriptionofcomponents .................................................... 75.1. Structure.................................................................................75.2. Cooling circuit .........................................................................75.3. Hydraulic circuit ......................................................................75.4. Safety and control ..................................................................75.5. Electriccontrolboardandregulation ..................................... 7

6. Accessories .............................................................................96.1. Accessoriescompatibilitytable ............................................. 9

7. Technical data ......................................................................107.1. Heat pump water side inversion [ ° ] ....................................10

8. Operatinglimits ....................................................................138.1. Operatinglimitsstandardversion ........................................ 138.2. Operatinglimitscondenserless version ..........................138.3. Design data ...........................................................................13

9. Performanceandabsorptionthatdifferfromthenominal values - standard versions .................................................... 149.1. Cooling capacity and input power ........................................ 149.2. Forδtdifferentfromtheratedvalue ................................... 149.3. Fouling factors ......................................................................149.4. Heatingcapacityandinputpower ....................................... 159.5. Forδtdifferentfromtheratedvalue ................................... 159.6. Fouling factors ......................................................................159.8. Cooling capacity and input power ........................................ 169.9. Forδtdifferentfromtheratedvalue ................................... 169.10. Fouling factors ......................................................................16

10. Pressure drops ......................................................................17

11. Minimum/maximum water content in the system...............20

12. Expansionvesselcalibration ................................................ 20

13. Ethylene glycol......................................................................21

14. Propylenic glycol ...................................................................21

15. Sound data ...........................................................................2215.1. Sound level of wrl standard version ..................................... 22

16. Safetyandceckparametersettings ...................................... 22

Standards and directives to be followed in the design and manufacture of the unit:

STANDARD1. UL 1995 Heating and cooling equipment2. ANSI/NFPA Standard 70 National Electrical code (N.E.C.)3. CSA C.22.1.- C.22.2 Safety Standard Electrical Installation

SAFETY LEVEL1. IP24

ACOUSTIC PART1. ISODIS9614/2(sound intensity

method)

REFRIGERANT GAS (R410A)This unit contains fluorinated gre-enhouse gases covered by the Kyoto Protocol. Maintenance and disposal operations must be only carried out by qualified staff, in compliance with existing laws.

example of technical plate

ATTENTION Tampering, removal, lack of the identification plate or other does not allow the safe identification of the product and will make any installation or maintenance operation to be performed difficult.

1. GENERAL WARNINGS

The WRL AERMEC units are constructed according to the recognised technical standards and safety regulations. They are designed for summer and winter conditioning and the production of domestic hot water. Any contractual or extracontractual liability of the Company is excluded for injury/damage to persons, animals or objects owing to installation, regulation and maintenance errors or improper use. All uses not expressly indicated in this manual are prohibited.

1.1. PRESERVATION OF THE DOCUMENTATION

The instructions along with all the related documentation must be given to the user of the system, who assumes the responsibility to conserve the instructions so that they are always at hand in case of need. Read this sheet carefully; the execution of all works must be performed by qualified staff, according to Standards in force on this subject in different countries. (Ministerial Decree 329/2004).

1.2. INSTALLATION

The unit must be installed in such a way that maintenance and/or repairs can be carried out.

1.3. WARRANTY

The appliance warranty does not cover the costs for ladder trucks, scaffolding, or other elevation systems that may become necessary for carrying out servicing under warranty. Do not modify or tamper with the unit as dangerous situations can be created and the manufacturer will not be liable for any damage caused. The validity of the warranty shall be void in the event of failure to comply with the above-mentioned indications.

1.4. WARNINGS REGARDING SAFETY AND INSTALLATION STANDARDS

• The unit must be installed by a qualified and suitably trained technician, in compli-ance with the national legislation in force in the country of destination (Ministerial Decree 329/2004). AERMEC will not assume any re-sponsibility for damage due to fail-ure to follow these instructions.

• Before beginning any operation, READ THESE INSTRUCTIONS CAREFULLY AND CARRY OUT THE SAFETY CHECKS TO AVOID ALL RISKS. All the staff involved must have thorough knowledge of the operations and any dangers that may arise at the moment in which the installation operations are carried out.

2. PRODUCT IDENTIFICATION

The units can be identified through:• PACKING LABEL which shows the

product identification data

• TECHNICAL PLATE

2.1. TECHNICAL PLATE POSITION

4 IWRLPY. 1403. 5890710_01

COOLING CIRCUIT WRL 200 WRL 400 WRL 500

CONFIGURATION ° D E ° D E ° D E

Compressor • • • • • • • • •

Discharge check valve • • • • • • • • •

Condenser exchanger • • n.a. • • n.a. • • n.a.

Evaporator exchanger • • • • • • • • •

Desuperheatherexchanger(Option) n.a. • n.a. n.a. • n.a. n.a. • n.a.

Hot gas by-pass valve n.a. • n.a. n.a. • n.a. n.a. • n.a.

Dehydratorfilter • • • • • • • • •

Liquid sight glass • • • • • • • • •

Mechanicalthermostaticvalve • • • • • • • • •

Electronicthermostaticvalve(Option) • • • • • • • • •

Low pressure transducers • • • • • • • • •

High pressure transducers • • • • • • • • •

High pressure switch • • • • • • • • •

HYDRAULIC CIRCUIT External andsystem sidepump

WRL 200 WRL 400 WRL 500

CONFIGURATION ° D E ° D E ° D E

Waterfilter(evaporator)

no pump • • • • • • • • •

pump • • • • • • • • •

Flow switch (Evaporator)

no pump • • • • • • • • •

pump • • • • • • • • •

Safety valve (evaporator and condenser)

no pump • • • • • • • • •

pump • • • • • • • • •

Expansion vassel (evaporator and condenser)

no pump n.a. n.a. n.a. n.a. n.a. n.a. n.a. n.a. n.a.

pump • • • • • • • • •

Drain valve (evaporator and condenser)

no pump • • • • • • • • •

pump • • • • • • • • •

Key:

• available n.a. not available

PRESENTATIONAERMEC presents the new WRL units, HYDRAU-LIC CIRCUIT REVERSIBLE CHILLER, optimised for geothermic systems that are water-cooled and operate with R410A refrigerant.

TYPE UNITThey are indoor units with hermetic scroll com-pressors that perfectly meet the requirements of the residential market:

HIGH PERFORMANCEThese units have been designed optimising functioning in heat pump mode, allowing to reach high efficiencies.

EASY INSTALLATIONThe electric and hydraulic connections are all positioned in the upper part of the unit facilitating the installation and maintenance operations. This also allows to reduce the tech-nical spaces and their positioning in as smaller space possible.

SILENTThe units are distinguished for their silent operation. Careful soundproofing of the unit with suitable sound-absorbent material confer all units with noise limits that allow them to be used in homes and not necessarily in dedicated techni-cal premises.

THE UNITS ARE OPTIMISED FORGeothermic systems Production of water for heating systems with fan coils, radiant PANELS or LOW TEMPERATURE RADIATORS, up to 55°C/131°F.

3. PRESENTATION

4. CECK LIST

5IWRLPY. 1403. 5890710_01

4.1. DESCRIPTION AND CHOICE OF THE UNIT

1 2 3 4 5 6 7 8 9 10 11 12 13 14 15

WRL 200 X ° ° ° U ° ° S °

Field:

1 2 3 Code WRL

4 5 6 Size 200, 400, 500

7 Field of use° standard mechanical thermostatic valve (min. water out temp +4°C)Y mechanical thermostatic valve (water outlet temp range -8 ÷ 4°C)X electronic thermostatic valve (min. water out temp +4°C, contact the factory for lower temperatures)

8 Model:° heat pump water side inversionE condenserless, ONLY for water side inversion (DATA ON DEMAND)

9 Version:° standard

10 Heat recovery° without heat recoveryD with desuperheater

11 External side pump° without hydronic kitU high head pumpV modulating 2 way valve

12 System side pumps° without hydronic kitN high head pump

13 Reserved blank°

14 Soft start° without soft startS soft start

15 Power supply6 230V 3 60Hz with magnetic circuit breaker7 460V 3 60Hz with magnetic circuit breaker8 575V 3 60Hz with magnetic circuit breaker

6 IWRLPY. 1403. 5890710_01

5. DESCRIPTION OF COMPONENTS

5.1. STRUCTURE

BASEAND SUPPORT STRUCTUREMade up from hot galvanised sheet steel elements with suitable thickness. All parts painted with polyester powder paints (RAL 9002), resistant to atmospheric agents.Realised in a way to allow total accessibility to the components internal components. All panels are covered with sound-absorbent material with suitable thickness.

5.2. COOLING CIRCUIT

COMPRESSORHigh efficiency scroll hermetic compressors (mounted on anti-vibration supports), activated by a 2-pole electric motor with internal heat protection.

DISCHARGE CHECK VALVE

CONDENSER EXCHANGEPlate type (AISI 316). It is insulated externally with closed cell material to reduce thermal dispersions.

EVAPORATOR EXCHANGEPlate type (AISI 316). It is insulated externally with closed cell material to reduce thermal dispersions.

DESUPEREHEATER EXCHANGE (OPTION)Unit with (AISI 316) heat plate, insulated externally with closed cell material to reduce heat loss.

HOT GAS BY-PASS VALVE Hot gas By-pass valve injection, hot gas device injection upstream of the evaporator.

DEHYDRATOR FILTERMechanical dehydrator filter realised in ceramics and hygroscopic material, able to withhold impurities and any traces of humidity present in the cooling circuit.

LIQUID SIGHT GLASS

MECHANICAL THERMOSTATIC VALVEThe mechanical valve, with external equaliser positioned at the evaporator inlet, modulates the flow of gas to the evaporator, according to the heat load, in order to ensure a correct heating level of the intake gas.

ELECTRONIC THERMOSTATIC VALVE (OPTION)The valve modulates the flow of gas to the evaporator, according to the heat load, in order to ensure a correct heating level of the intake gas.

5.3. HYDRAULIC CIRCUIT

WRL STANDARD VERSION (SUPPLIED AS STANDARD)

WATER FILTEREquipped with steel filtering mesh; prevents the heat exchangers from clogging.

FLOW SWITCHIt checks that here is water circulation. Adversary, it blocks the unit.

SAFETY VALVE (6bar/87PSI).Equipped with a piped discharger and intervenes by discharges the over pressure in case of anomalous pressures.

DRAIN VALVE

WRL PUMP/PUMPS VERSION (SUPPLIED AS STANDARD)

WATER FILTEREquipped with steel filtering mesh; prevents the heat exchangers from clogging.

FLOW SWITCHIt checks that here is water circulation. Adversary, it blocks the unit.

SAFETY VALVE (6bar/87PSI).Equipped with a piped discharger and intervenes by discharges the over pressure in case of anomalous pressures.

EXPANSION VASSELWith nitrogen pre-load membrane.

DRAIN VALVE

5.4. SAFETY AND CONTROL

LOW PRESSURE TRANSDUCERSPlaced on the low pressure side of the cooling circuit, it signals the work pressure to the control board, generating a pre-warning in case of anomalous pressures.

HIGH PRESSURE TRANSDUCERPlaced on high pressure side of cooling circuit, signals the work pressure to control board, generating a pre-warning in case abnormal pressure occurs.

HIGH PRESSURE PRESSURE SWITCHWith fixed calibration, placed on high pressure side of cooling circuit, inhibits functioning of compressor if abnormal work pressure occurs.

5.5. ELECTRIC CONTROL BOARD AND REGULATION

Electric power and control board, manufactured in compliance with the EN 60204-1/IEC 204-1 Standards, complete with:• door lock main isolating switch,• magnet circuit breaker switches and

contactors for compressors,• phase sequence control,• connection clamps to the remote

keyboard (OPTIONAL),• clamps for signalling the remote alarm,• clamps for signalling compressor switch-

on status,• clamps for boiler/resistance alarm signal,• clamps for differential pressure switch

alarm signal,• clamps for external air temperature

probe (ACCESSORY),• electronic control µPC,• soft-start (OPTIONAL),• control circuit numbered cables,• clamps for 3-way valve,• 0-10V clamps for modulating valve

control.

Electronic controller µPCThe device is the new controller for management of the water-cooled reversible units; the new PGD1 8-digit display is clearly legible, while the icons provide immediate visibility of machine operation.Some accesses are protected by password and only available to the after-sales technical service.The electronics also integrates a series of protection algorithms with the purpose of preventing any damage to the main components of the system.

FUNCTIONALITY LIST:1. Parameterisation of the compressor

switch-on/off times prevent switch on/off activation at short intervals.

2. In order to prevent breakage of the plate heat exchanger due to freezing water, 3 antifreezes, “geothermic, system and zones” are envisioned which are contained within. The microprocessor also envisions compressor block, whenever the temperature detected by the heat exchanger output probe is lower than the anti-freeze set.

3. Water flow rate alarm activated by the differential pressure switches installed in series.

4. Condensation control is managed via speed modulation of the pumps with phase cut systems or inverters, a 2-way modulating valve and ON/OFF pumps.

5. Production of DHW through a 3-way diverter valve or the total recovery version.

7IWRLPY. 1403. 5890710_01

Additional functions:• Control of an external integration

resource dedicated to DHW.• System control with heat pump and boiler.• Anti-Legionella cycle.• Time periods for the daily /

weekly programming.

Heat regulation Temperature regulation is based on the

return water from the system. The configured set points refer to the temperature of the return water. If, for example, the set point is set at +30°C/86°F, a flow temperature of 35°C/95°F results.

System side circulation pumpThe circuit board envisions an output for the management of the circulation pump, always on in COOLING and HEATING mode, switched off with a delay of 1 minute from unit switch off (stand-by).

Source side pumpThe circuit board envisions an output for the source side pump control (see pumps available at configurator). The source side pump is switched on before start up of the compressor and switched off about 30 seconds after the compressor is switched off.

Anti-freeze alarm The anti-freeze function is only active if

the unit is ON or in stand-by.In order to prevent breakage of the plate heat exchanger due to freezing of the water it contains, the micro processor envisions the compressor blocking if the temperature detected by the heat exchanger output probe results less than +4°C/39,2°F.THIS ANTI-FREEZE SET TEMPERATURE CAN ONLY BE VARIED BY AN AUTHORISED AFTER-SALES CENTRE AND ONLY AFTER HAVING CHECKED THAT THERE IS ANTI-FREEZE SOLUTION IN THE WATER SYSTEM.The intervention of this alarm determines compressor and block but not of the pump, which remains active.

Domestic hot water anti-freezeThe DHW anti-freeze function is only active if it has an integration resource dedicated to the storage of domestic hot water.The integration resource is activated if the temperature of the water detected by the sanitary probe is less than +4°C/39,2°F and is switched off at +7°C/44,6°F.

WizardTo facilitate commissioning the unit, a start-up procedure has been created. This procedure is used upon the first start-up.

Supervision system − MODBUS

For other requirements, contact the head office.

PGD1 GRAPHIC TERMINAL• backlit• LCD• Icons to identify the type of operation.

PGD1

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6. ACCESSORIES

• AER485P1: RS-485 interface for supervis-ing systems with MODBUS protocol.

• VT: Anti-vibration mounts to be assem-bled under the unit's sheet steel base.

• PGD1: Simplified remote panel. Allows to perform the basic controls of the unit with alarm signals. Can be con-trolled from a max of 500 m with 2 PAIRS of TWISTED cable + SHIELD with shielded pairs and TCONN6J000.

WRL 200 400 500AER485P1 ● ● ●

VT 9 9 15

PGD1 ● ● ●

6.1. ACCESSORIES COMPATIBILITY TABLE

9IWRLPY. 1403. 5890710_01

7. TECHNICAL DATA

7.1. HEAT PUMP WATER SIDE INVERSION [ ° ]

Mod. WRL U.M. 200 400 500Cooling capacity [1] ton 15,26 20,64 26,86Input power kW 11,38 15,08 19,02Evaporator water flow gpm 36,56 49,43 64,33Evaporator pressure drop PSI 3,1 5,5 3,0Condenser water flow gpm 45,99 61,97 80,25Condenser pressure drop PSI 4,2 8,2 3,9Heating capacity [2] BTU/h 198652 267625 344456Input power kW 14,11 19,1 23,4Condenser water flow gpm 44,09 59,40 76,45Condenser pressure drop PSI 3,9 7,5 3,6Evaporator water flow gpm 33,94 45,66 59,61Evaporator pressure drop PSI 2,7 4,7 2,6ENERGY INDEXESEER BTU/W 16,12 16,44 16,96COP W/W 4,13 4,11 4,31AHRI PART LOAD RATINGSIPLV W/W 21,06 21,47 22,16EER (100% load) W/W 4,72 4,81 4,97EER (75% load) W/W 5,60 5,71 5,89EER (50% load) W/W 6,63 6,76 6,97EER (25% load) W/W 6,54 6,67 6,88ELECTRICAL DATA (230V-3-60Hz power supply “6”)Input current (cooling) A 42 53 71Input current (heating) A 47 62 83No pump versionLRA A 222 276 357MCA A 69 84 129MOP A 100 121 186Recommended fuse A 90 110 175Only evaporator pump LRA A 230 284 365MCA A 77 91 136MOP A 108 129 194Recommended fuse A 100 125 175Only condenser pump LRA A 230 284 365MCA A 77 91 136MOP A 108 129 194Recommended fuse A 100 125 175Evap + cond pumpsLRA A 237 292 373MCA A 85 99 144MOP A 115 136 201Recommended fuse A 110 125 200

In cooling operation [1]:Evaporator:Water outlet temperature ............................6,7°C - 44°FWater flow ....................................................0,043l/s per kW - 2,4gpm/ton∆t ..................................................................5,56K

Condenser:Water inlet temperature ..............................29,4°C - 85°FWater flow ....................................................0,054l/s per kW - 3gmp/ton∆t ..................................................................5,31K

Reference data (AHRI standard):

In heating operation [2]:Evaporator:Water inlet temperature ..............................10°C - 50°FWater outlet temperature ............................5°C - 41°F∆t ..................................................................5K

Condenser:Water inlet temperature ..............................40°C - 104°FWater outlet temperature ............................45°C - 113°F∆t ..................................................................5K

10 IWRLPY. 1403. 5890710_01

Mod. WRL U.M. 200 400 500ELECTRICAL DATA (460V-3-60Hz power supply “7”)Input current (cooling) A 21 26 32Input current (heating) A 23 31 38No pump versionLRA A 116 147 177MCA A 34 47 58MOP A 49 67 83Recommended fuse A 45 60 80Only evaporator pump LRA A 121 152 182MCA A 39 52 63MOP A 53 72 88Recommended fuse A 50 70 80Only condenser pump LRA A 121 152 182MCA A 39 52 63MOP A 53 72 88Recommended fuse A 50 70 80Evap + cond pumpsLRA A 125 156 186MCA A 43 56 67MOP A 58 76 92Recommended fuse A 50 75 90ELECTRICAL DATA (575V-3-60Hz power supply “8”)Input current (cooling) A 16 20 25Input current (heating) A 18 24 29No pump versionLRA A 90 96 133MCA A 26 34 52MOP A 37 48 74Recommended fuse A 35 45 70Only evaporator pump LRA A 92 99 136MCA A 28 37 55MOP A 38 52 77Recommended fuse A 35 50 70Only condenser pump LRA A 92 99 136MCA A 28 37 55MOP A 38 52 77Recommended fuse A 35 50 70Evap + cond pumpsLRA A 94 103 140MCA A 29 41 59MOP A 40 55 81Recommended fuse A 40 50 80

In cooling operation [1]:Evaporator:Water outlet temperature ............................6,7°C - 44°FWater flow ....................................................0,043l/s per kW - 2,4gpm/ton∆t ..................................................................5,56K

Condenser:Water inlet temperature ..............................29,4°C - 85°FWater flow ....................................................0,054l/s per kW - 3gmp/ton∆t ..................................................................5,31K

Reference data (AHRI standard):

In heating operation [2]:Evaporator:Water inlet temperature ..............................10°C - 50°FWater outlet temperature ............................5°C - 41°F∆t ..................................................................5K

Condenser:Water inlet temperature ..............................40°C - 104°FWater outlet temperature ............................45°C - 113°F∆t ..................................................................5K

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Mod. WRL U.M. 200 400 500CHARGE Refrigerant R410A lb 3,9 3,9 5,7Oil gal 1,0 1,8 1,8COMPRESSORSQuantity / Circuits - 2 / 1 2 / 1 2 / 1Capacity control % 0/50/100 0/50/100 0/50/100EVAPORATORQuantity n° 1 1 1Water content l 11,7 11,7 15,1Water connections (Victaulic) inch 2" 2" 2" 1/2CONDENSERQuantity - 1 1 1Water content gal 3,4 3,4 4,4Water connections (Victaulic) inch 2" 2" 2" 1/2DESUPERHEATER (WRL IN COOLING MODE)Recovered heating capacity (40/45°C) BTU/h 32514 52254 64515Quantity - 1 1 1Desuperheater water flow gpm 7,21 11,59 14,31Desuperheater pressure drop PSI 0,1 0,2 0,2DESUPERHEATER (WRL IN HEATING MODE)Recovered heating capacity (40/45°C) BTU/h 44740 71311 87773Condenser heating capacity BTU/h 154141 196618 257077Quantity - 1 1 1Desuperheater water flow gpm 9,92 15,81 19,46Desuperheater pressure drop PSI 0,2 0,4 0,4DESUPERHEATER DATADesuperheater MIN water flow gpm 3,08 3,08 3,74Desuperheater MAX water flow gpm 74,85 74,85 74,85Water connections (Victaulic) inch 1" 1/2 1" 1/2 1" 1/2EVAPORATOR PUMP (OPTION N)Input power @230/460V kW 2,2 2,2 2,2Input power @575V kW 1,28 2,5 2,5Input current @230V A 7,8 7,8 7,8Input current @460V A 4,5 4,5 4,5Input current @575V A 1,84 3,5 3,5Available head @230/460V PSI 30,0 26,8 28,2Available head @575V PSI 29,5 26,7 27,4CONDENSER PUMP (OPTION U)Input power @230/460V kW 2,2 2,2 2,2Input power @575V kW 1,28 2,5 2,5Input current @230V A 7,8 7,8 7,8Input current @460V A 4,5 4,5 4,5Input current @575V A 1,84 3,5 3,5Available head @230/460V PSI 28,5 22,9 24,9Available head @575V PSI 26,2 22,2 23,5EXPANSION VESSELExpansion vessel n°/gal 1/2,1 1/2,1 1/3,2Expansion vessel calibration PSI 21,8 21,8 21,8SOUND DATA (NO PUMPS VERSION)Sound power dB(A) 78 82 83Sound pressure dB(A) 46 50 51DIMENSIONS

Hight mm 1380 1380 1380inch 54,3 54,3 54,3

Width mm 845 845 845inch 33,3 33,3 33,3

Lenght mm 1320 1320 2059inch 52,0 52,0 81,1

Weight kg 349 411 560lb 770,1 906,8 1234,5

SOUND POWERAermec determines sound power values on the basis of measurements made in accordance with UNI EN ISO 9614-2, as required for Eurovent certification.

SOUND PRESSURESound pressure in free field, at 10m / 32,8ft distance from the external surface of the unit (in accordance with UNI EN ISO 3744)

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8. OPERATING LIMITS

8.1. OPERATING LIMITS STANDARD VERSION

The operatinglimitsdiagramisrelativetoa∆ton the evaporator and the condenser of 5K.

Condenser outlet inlet difference (Δtc):min: 5°C / 41°Fmax: 22°C / 71,6°F

Evaporator outletinlet difference (Δte):min: 3°C / 37,4°Fmax: 10°C / 50°F

2068

75

85

95

105

115

125

135

145

149

25

30

35

40

45

50

55

60

65

°F °C

-10 -8 -6 -4 -2 0 2 4 6 8 10 12 14 16 18 20 22

14 15 20 25 30 35 40 45 50 55 60 65 70 71,6 °F

°C

Standard functioning / X

(for different temperature contact the head office)

Operating with glycol Y

EVAPORATOR WATER OUTLET TEMPERATURE

CON

DEN

SER

WAT

ER O

UTL

ET T

EMPE

RATU

RE

STANDARD VERSION

-10 -8 -6 -4 -2 0 2 4 6 8 10 12 14 16 18 20 22

14 15 20 25 30 35 40 45 50 55 60 65 70 71,6 °F

°C

2068

75

85

95

105

115

125

135

145

149

25

30

35

40

45

50

55

60

65

°F °C

Standard functioning / X

(for different temperature contact the head office)Operating

with glycol Y

EVAPORATOR WATER OUTLET TEMPERATURE

CON

DEN

SIN

G T

EMPE

RATU

RE

CONDENSERLESS VERSION8.2. OPERATING LIMITS CONDENS-ERLESS VERSION

The operating limits diagram is relative to a ∆t on the evaporator and the condenser of 5K.

Evaporator outlet inlet difference (Δte):min: 3°C / 37,4°Fmax: 10°C / 50°F

REFRIGERANT SIDE FOR WRL U.M. High pressure side

Low pressure side

Acceptable maximum pressure bar / PSI 45 / 653 29,5 / 428

Acceptable maximum temperature °C / °F 120 / 248 50 / 122

Acceptable minimum temperature °C / °F -30 / -22 -35 / -31

8.3. DESIGN DATA

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9. PERFORMANCE AND ABSORPTION THAT DIFFER FROM THE NOMINAL VALUES - STANDARD VERSIONS

9.1. COOLING CAPACITY AND INPUT POWER

The refrigerating capacity yielded and the input electrical capacity in conditions other thanrated conditions are obtained by multiplying the rated values (Pc, Pa) by the respective correction coefficients (Cf, Ca).The diagram allows you to obtain the correc-tion coefficients; corresponding to each curve,the temperature of the hot processed water referred to is reported, assuming a differencein water temperature between the input and output of the condenser equal to 5°C/10°F.

KEY:Pc: Cooling capacity Pa: Input powerCf: Cooling capacity correction coefficientCa: Input power correction coefficient

KEY:Pc: Cooling capacity Pa: Input powerCf: Cooling capacity correction coefficientCa: Input power correction coefficient

9.2. FOR ΔT DIFFERENT FROM THE RATED VALUE

ForΔtdifferentfrom5Ktotheevaporator,refer to Tab. “∆t DIFFERENT FROM NOMI-NAL (∆t 5)” for the cooling capacity and input power correction factors.

9.3. FOULING FACTORS

The performance levels indicated in table: ”FOULING FACTOR [K*M2]/[W]” refer to con-ditions with clean tubes, with a fouling factor = 1. For values different from the fouling factor,multiply the values in the performance table by the reported coefficients.

Condenser output water temperature Δt 5K

Pc: C

orre

ction

Coe

ffici

ents

(Coo

ling

Capa

city

)

86

30

0,4

0,5

0,6

0,7

0,8

0,9

1,0

1,1

1,2

1,3

1,4

32 34 36 38 40 42 44 46 48 50 52 54 56

F

E

D

C

B

A

°C

°F88 90 92 94 96 98 100 102 104 106 108 110 112 114 116 118 120 122 124 126 128 130 132 132,8

34,7

94,5

A B C D E F

Condenser output water temperature

°C -6 0 6,7 10 13 18°F 21,2 32 44,1 50 55,4 64,4

COOLING CAPACITY

94,5

30

0,85

0,90

0,95

1,00

1,05

1,10

1,15

1,20

1,25

1,30

1,35

1,40

1,45

1,50

32 34 36 38 40 42 44 46 48 50 52 54 56

132,8 °F

°C

8686 88 90 92 94 96 98 100 102 104 106 108 110 112 114 116 118 120 122 124 126 128 130

34,7

132

ABCDEF

Condenser output water temperature Δt 5K

Pa: C

orre

ction

Coe

ffici

ents

(Inp

ut p

ower

)

A B C D E F


°C -6 0 6,7 10 13 18°F 21,2 32 44,1 50 55,4 64,4

INPUT POWER - COOLING MODE

∆t DIFFERENT FROM NOMINAL (∆t 5)AT THE EVAPORATOR 3 5 8 10Cooling capacity 0,99 1 1,02 1,03Input power 0,99 1 1,01 1,02Heating capacity 0,99 1 1,02 1,03AL CONDENSER - 5 10 15Cooling capacity - 1 1,01 1,02Input power - 1 0,99 0,98Heating capacity the variations can be ignored

FOULING FACTOR [K*M2]/[W]0,00001 0,00002 0,00005

Cooling capacity 1 0,99 0,98Input power 1 1 1Heating capacity 1 1 0,99Input power 1 1 1,02

14 IWRLPY. 1403. 5890710_01

15IWRLPY. 1403. 5890710_01

9.4. HEATING CAPACITY AND INPUT POWER

The heating capacity yielded and the input electrical capacity in conditions other thanrated conditions are obtained by multiplying the rated values (Ph, Pa) by the respective correction coefficients (Ch, Ca).The diagram allows you to obtain the correc-tion coefficients; corresponding to each curve,the temperature of the hot processed water referred to is reported, assuming a differencein water temperature between the input and output of the condenser equal to 5°C/10°F.

KEY:Ph: Heating capacity Pa: Input powerCh: Heat capacity correction coefficientCa: Input power correction coefficient


ForΔtdifferentfrom5K,refertoTab.“∆t DIFFERENT FROM NOMINAL (∆t 5)” for the cooling capacity and input power correc-tion factors.



INPUT POWER - HEATING MODE




A B C D E F


°C -8 0 5 10 15 18°F 17,6 32 41 50 59 64,4

A B C D E F


°C -8 0 5 10 15 18°F 17,6 32 41 50 59 64,4

25

0,6

0,7

0,8

0,9

1,0

1,1

1,2

1,3

1,4

1,5

30 35 40 45 50 55

77 80 85 90 95 100 105 110 115 20 125 131

°C

°F130

Temperature of water produced at condenser Δt 5K

Ph: C

orre

ction

Coe

ffici

ents

(Hea

ting

Capa

city

)

F

E

D

C

B

A

25

0,60

0,65

0,70

0,75

0,80

0,85

0,90

0,95

1,00

1,05

1,10

1,15

1,20

27 29 31 33 35 37 39 41 43 45 47 49 51 53 55

77 80 85 90 95 100 105 110 115 120 125 130 131

ABCDEF

Temperature of water produced at condenser Δt 5K

Pa: C

orre

ction

Coe

ffici

ents

(Inp

ut p

ower

)

9.8. COOLING CAPACITY AND INPUT POWER

The heating capacity yielded in conditions other than rated conditions are obtained by multiplying the rated values (Ph, Pa) by therespective correction coefficients (Cd). Diagram (Tab. 8.10.1) allows you to obtain the correc-tion coefficients; corresponding to each curve, the temperature of the hot processed water re-ferred to is reported, assuming a difference inwater temperature between the input and output of the condenser equal to 5°C/10°F.

KEY:Ph: Heating capacity Pa: Input powerCd: Desuperheater heating capacity correction coefficient


ForΔtdifferentfrom5Ktotheevaporator,refer to Tab. “∆t DIFFERENT FROM NOMI-NAL (∆t 5)” for the cooling capacity and input power correction factors.



5040 41 43 45

122

°C

°F104 105 106 107 108 109 110 111 112 113 114 115 116 117 118 119 120 121

0,7

0,8

0,9

1,0

1,1

1,2

1,3

1,4

42 44 46 47 48 49

ABCD

E

F

Temperature of water produced at Desuperheater Δt 5K

Cd: W

ater

tem

pera

ture

at C

onde

nser

out

let

A B C D E F


°C -6 0 6,7 10 13 18°F 21,2 32 44,1 50 55,4 64,4

HEATING CAPACITY - DESUPERHEATER




16 IWRLPY. 1403. 5890710_01

10. PRESSURE DROPS

Thecurvesrepresentthepressuredrops(Min.∆10),(Max∆3).WARNING: verify the calibration of the flow switch according to the system operating conditions.The hydraulic circuit is protected by a safety valve calibrated at 6 bar.

EVAPORATORAverage water temperature (°C / °F) 5/41 10/50 15/59 20/68 25/77 30/86 35/95Multiplicative coefficient 1,02 1,00 0,98 0,97 0,96 0,95 0,94

EVAPORATOR PRESSURE DROP COOLING MODE FUNCTIONINGThe diagram pressure drops are related to an average water temperature of 10 °C/50°F.

WATER FLOW RATE

PRES

SURE

DRO

PS

0

0

10

20

30

40

50

60

70

80

90

100

110

0

1

2

3

4

5

6

7

8

9

10

11

12

13

14

15

16

kPa

WRL 200-400

WRL 500

psi

5000 10000 15000 20000 25000 30000 35000

0 20 30 40 50 60 70 80 90 100 110 120 130 140 150 154 gpm10

l/h

CONDENSERAverage water temperature (°C / °F) 23/73,4 28/82,4 33/91,4 38/100,4 43/109,4 48/118,4 53/127,4 58/136,4Multiplicative coefficient 1,02 1,01 1,00 0,99 0,98 0,97 0,96 0,95

CONDENSER PRESSURE DROP COOLING MODE FUNCTIONINGThe diagram pressure drops are related to an average water temperature of 10 °C/50°F.

WATER FLOW RATE

PRES

SURE

DRO

PS

0

0

10

20

30

40

50

60

70

80

90

100

110

0

1

2

3

4

5

6

7

8

9

10

11

12

13

14

15

16

kPa

WRL 200-400

WRL 500

psi

5000 10000 15000 20000 25000 30000 35000

0 20 30 40 50 60 70 80 90 100 110 120 130 140 150 154 gpm10

l/h

Water flow rate MIN e MAXWRL

Model u.m. MIN MAXWRL 200 gpm 9,03 95,10WRL 400 gpm 11,67 95,10WRL 500 gpm 11,67 95,10

Water flow rate MIN e MAXWRL


ATTENTION• Lower water flow speed might get some substance deposited in the heat exchanger• Higher water flow speed might cause mechanical damages


17IWRLPY. 1403. 5890710_01

Thecurvesrepresentthepressuredrops(Min.∆10),(Max∆3).WARNING: verify the calibration of the flow switch according to the system operating conditions.The hydraulic circuit is protected by a safety valve calibrated at 6 bar.

DESUPERHEATER PRESSURE DROP COOLING MODE FUNCTIONINGThe diagram pressure drops are related to an average water temperature of 10 °C/50°F.

WATER FLOW RATE

PRES

SURE

DRO

PS

00

5

1,0

0,5

10

152,2

kPaPSI

2,0

1,5

0

1000 2000 3000 4000 5000 6000 7000 8000

0 5 10 15 20 25 30 35

l/h

gpm

WRL 200-400

WRL 500

DESUPERHEATERAverage water temperature (°C/°F) 23/73,4 28/82,4 33/91,4 38/100,4 43/109,4 48/118,4 53/127,4 58/136,4Multiplicative coefficient 1,02 1,01 1,00 0,99 0,98 0,97 0,96 0,95

Water flow rate MIN e MAX “heating mode”WRL


The pressure drops in the charts refer to an average water temperature of 50°C/122°F. Shows the corrections on the table to apply to the pressure drops with a variation in average water temperature.


18 IWRLPY. 1403. 5890710_01

1

2

3

45

0

0

20

40

60

80

100

120

140

160

180

200

220

240

kPa

34,8

30

32

34

0

2

4

6

8

10

12

14

16

18

20

22

24

26

28

psi

5000 10000 15000 20000 25000 30000

0 10 20 30 40 50 60 70 80 90 100 110 120 130 132 gpm

l/h

EVAPORATOR USEFUL HEAD COOLING MODE FUNCTIONING

1 WRL 200WRL 400

230/460V

2 WRL 500 230/460V

3 WRL 200 575V

4 WRL 400 575V

5 WRL 500 575V

1

2

3

4

5

0

kPa

50005000 10000 15000 20000 25000 30000

0 10 20 30 40 50 60 70 80 90 100 110 120 130 132 gpm

l/h

0

20

40

60

80

100

120

140

160

180

200

220

24034,8

30

32

34

0

2

4

6

8

10

12

14

16

18

20

22

24

26

28

psi

CONDENSER USEFUL HEAD COOLING MODE FUNCTIONING

1 WRL 200WRL 400

230/460V

2 WRL 500 230/460V

3 WRL 200 575V

4 WRL 400 575V

5 WRL 500 575V

19IWRLPY. 1403. 5890710_01

11. MINIMUM/MAXIMUM WATER CONTENT IN THE SYSTEM

12. EXPANSION VESSEL CALIBRATION

The standard pressure pre-load value of the expansion vessel is 1,5bar/21,8PSI, maximum value is 6bar/87PSI.

The calibration of the vessel must be regulated in accordance with the maximum level difference (H) of the user (see diagram) using the following formula:p (calibration) [bar] = H [m] / 10.2 + 0.3.

For example: if level difference H is equal to 20m/65,6ft, the calibration value of the vessel will be 2,3bar/33,4PSI. If the calibration value obtained from the formula is less than 1,5bar/21,8PSI (i.e. for H < 12.25), use the standard calibration.

Reference operational conditions:(1) Cooling: Max water temp. = 40°C/104°F, min water temp. = 4°C/39,2°F.(2) Heating (heat pump): Max water temp. = 60°C/140°F, Min water temp. = 4°C/39,2°F.

KEY(1) Check that highest installation is not higher than 55m/180,3ft.(2) Ensure that lowest installation can withstand global pressure in that position.

WRL versions U.M. 200 400 500

Minimum water content in the system (standard). all gal/ton 6,50 6,50 6,50

Minimum water content in the system for process applications or operation with low load. all gal/ton 13,01 13,01 13,01

ΔtProjectdatalessthan5K.

WRL PUMPVERSION U.M. 200 400 500

GEOTHERMAL SIDE EXPANSION VESSEL (standard in versions with pump)

Quantity

B

n°

1 1 1

U 1 1 1

F 1 1 1

I 1 1 1

Capacity - l/gal 8/2,1 8/2,1 12/3,2

SYSTEM SIDE EXPANSION VESSEL (standard in versions with pump)

QuantityP

n°1 1 1

N 1 1 1

Capacity - l/gal 8/2,1 8/2,1 12/3,2

20 IWRLPY. 1403. 5890710_01

Qw: Corrective factor of flow rates (middle water temperatur 9,5°C/49,1°F)Pc: Corrective factor of cooling capacityPh: Corrective factor of heating capacityPa: Corrective factor of imput powerDp: Corrective factor of pressure drop

13. ETHYLENE GLYCOL

14. PROPYLENIC GLYCOL

COOLING MODE - CORRECTION FACTOR WITH PROPYLENIC GLYCOL

Freezing Point °C/°F 0/32 -5/23 -7/19,4 -10/14 -13/8,6 -15/5 -20/-4 -25/-13 -30/-22 -37/-34,6 -44/-47,2Percent propylenic glycol % 0 10 15 20 25 30 35 40 45 50 55Qw - 1,000 1,019 1,028 1,038 1,048 1,058 1,068 1,078 1,089 1,099 1,110Pc - 1,000 0,985 0,978 0,970 0,963 0,955 0,947 0,939 0,932 0,924 0,916Pa - 1,000 0,996 0,994 0,992 0,990 0,988 0,986 0,984 0,982 0,980 0,978Dp - - 1,039 1,065 1,126 1,218 1,339 1,485 1,655 1,846 2,055 2,279

Qw: Corrective factor of flow rates (middle water temperatur 9,5°C/49,1°F)Pc: Corrective factor of cooling capacityPh: Corrective factor of heating capacityPa: Corrective factor of imput powerDp: Corrective factor of pressure drop

COOLING MODE - CORRECTION FACTOR WITH ETHYLENE GLYCOL

Freezing Point °C/°F 0/32 -5/23 -7/19,4 -10/14 -13/8,6 -15/5 -20/-4 -25/-13 -30/-22 -37/-34,6 -44/-47,2Percent ethylene glycol % 0 12 15 20 25 30 35 40 45 50 55Qw - 1,00 1,052 1,066 1,088 1,111 1,133 1,155 1,177 1,199 1,220 1,242Pc - 1,000 0,988 0,985 0,980 0,975 0,970 0,965 0,960 0,955 0,950 0,945Pa - 1,000 0,995 0,994 0,992 0,990 0,988 0,986 0,984 0,982 0,980 0,978Dp - - 1,103 1,159 1,222 1,292 1,368 1,452 1,541 1,637 1,740 1,849

HEATING MODE - CORRECTION FACTOR WITH ETHYLENE GLYCOL

Freezing Point °C/°F 0/32 -5/23 -7/19,4 -10/14 -13/8,6 -15/5 -20/-4 -25/-13 -30/-22 -37/-34,6 -44/-47,2Percent ethylene glycol % 0 10 15 20 25 30 35 40 45 50 55Qw - 1,000 1,029 1,045 1,064 1,085 1,107 1,131 1,156 1,184 1,213 1,244Ph - - - - - - - - - - - -Pa - 1,000 1,002 1,003 1,004 1,005 1,007 1,008 1,010 1,012 1,015 1,018Dp - - 1,047 1,078 1,114 1,158 1,209 1,268 1,336 1,413 1,501 1,599

HEATING MODE - CORRECTION FACTOR WITH PROPYLENIC GLYCOL

Freezing Point °C/°F 0/32 -5/23 -7/19,4 -10/14 -13/8,6 -15/5 -20/-4 -25/-13 -30/-22 -37/-34,6 -44/-47,2Percent propylenic glycol % 0 10 15 20 25 30 35 40 45 50 55Qw - 1,000 1,011 1,020 1,030 1,043 1,057 1,073 1,092 1,113 1,136 1,162Ph - - - - - - - - - - - -Pa - 1,000 1,003 1,004 1,005 1,007 1,009 1,011 1,014 1,018 1,023 1,029Dp - - 1,047 1,078 1,114 1,158 1,209 1,268 1,336 1,413 1,501 1,599

21IWRLPY. 1403. 5890710_01

15. SOUND DATA

15.1. SOUND LEVEL OF WRL STANDARD VERSION

SOUND POWER:Aermec determines sound power values on the basis of measurements made in accordance with UNI EN ISO 9614-2, as required for Euro-vent certification.

SOUND PRESSURE:Sound pressure in free field, at 10 m/ 393,7in distance from the external surface of the unit (in accordance with UNI EN ISO 3744)

16. SAFETY AND CECK PARAMETER SETTINGS

Reference data (AHRI standard) in cooling operation:

EVAPORATORWater outlet temperature ..... 6,7°C - 44°FWater flow ............................. 0,043l/s per kW - 2,4gpm/ton

CONDENSERWater inlet temperature ....... 29,4°C - 85°FWater flow ............................. 0,054l/s per kW - 3gpm/ton

WRLSound power

dB(A)

Sound pressure dB(A) Sound power by central band freq. dB(A)

32,8ft 3,3ft 125 250 500 1000 2000 4000 8000

WRL 200 78 46 61 64,2 60,7 63,9 69,1 75,3 71,6 51,6

WRL 400 82 50 65 77,6 73,5 68,9 65,1 75,3 74,8 62,5

WRL 500 83 51 66 65,9 74,4 73,2 72,5 74,2 80,1 60,5

Compressor thermomagnetic u.m. WRL 200 WRL 400 WRL 500Power supply: 230/3/60MTC1 A 34 41 63MTC2 A 34 41 63Power supply: 460/3/60MTC1 A 16 22 28MTC2 A 16 22 28Power supply: 575/3/60MTC1 A 12 16 24MTC2 A 12 16 24

Transducers and pressure switches u.m. WRL 200 WRL 400 WRL 500High pressure switch (HP) bar/PSI 40/580,2 40/580,2 40/580,2High pressure transducer (THP) bar/PSI 39/565,6 39/565,6 39/565,6Low pressure transducer (TLP) bar/PSI 1,6/23,2 1,6/23,2 1,6/23,2

Refrigerant circuit safety u.m. WRL 200 WRL 400 WRL 500High pressure relief valve bar/PSI 40,5/587,4 40,5/587,4 40,5/587,4

CHECK PARAMETERS

Cold Setting Water inlet temperature in cooling mode.MIN. 5°C/41°FMAX. 20°C/68°F

DEFAULT 12°C/53,6°F

Heating Setting Water inlet temperature in heat mode.MIN. 20°C/68°FMAX. 55°C/131°F


Anti-freezeintervention

Intervention temperature for the anti-freeze alarm, on EV side (water outlet temperature).

MIN. -MAX. -


Total differentialProportional temperature band within which the compressors are activated and deactiva-ted.

MIN. 0°C/32°FMAX. 15°C/59°F


22 IWRLPY. 1403. 5890710_01

The technical data in the following documentation are not binding. Aermec reserves the right to make all the modifications considered necessary for improving the product at any time.

37040 Bevilacqua (VR) - ItalyVia Roma, 996 - Tel. (+39) 0442 633111Telefax (+39) 0442 93730 – (+39) 0442 93566www.aermec.com

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