ductless installation training

1

UTC Building & Industrial Systems Confidential and Proprietary InformationNot for Further Distribution

Ductless Installation Training

Gregg Wells

Paul Nicastro

UTC Building & Industrial Systems Confidential and Proprietary Information – Not for Further Distribution

COURSE OBJECTIVES• Understand Ductless technology

and principles• Explore the Ductless product line

features and specifications• Examine Ductless product

functions and operations• Review installation procedures,

best practices, and testing• Identify and review start up

procedures• Discuss troubleshooting codes and

best practices

ABOUT THIS PROGRAM

2


TABLE OF CONTENTS

Section 1DUCTLESS TECHNOLOGY &

PRINCIPLES

Section 2PRODUCT OVERVIEW

Section 3FUNCTION AND

CONTROLS

Section 4INSTALLATION

Section 5START UP

Section 6TROUBLESHOOTING

UTC Building & Industrial Systems Confidential and Proprietary Information – Not for Further DistributionUTC Building & Industrial Systems Confidential and Proprietary Information – Not for Further Distribution

DUCTLESS TECHNOLOGY & PRINCIPLES

WHAT IS DUCTLESS?

1

3


• Provides more complete control, targeting areas with uneven temperatures

• Fan modulates continuously for better comfort control and cost savings

• Inverter technology with less temperature fluctuation and greater control

• Ductless means less labor, materials, and potentially less time

DUCTLESS TECHNOLOGY & PRINCIPLESWHAT IS DUCTLESS?


DUCTLESS TECHNOLOGY & PRINCIPLESWHAT IS DUCTLESS?

• Single Zone– One indoor unit corresponds to one

outdoor compressor

– Small pipe, small opening, little impact

• Multi-zone– One outdoor compressor can power up

to five indoor units

– Each indoor unit is controlled by a wireless remote

– Outdoor units rated down to -22F

TWO PRIMARY SYSTEM TYPES

4


DUCTLESS TECHNOLOGY & PRINCIPLESTHE DUCTLESS SYSTEM

Indoor Unit Controller Outdoor Unit


DUCTLESS TECHNOLOGY & PRINCIPLESAPPLICATION EXAMPLES

Sunroom Bonus Room Basement

From Key Zones To Whole Home – Comfort For Every Space!

5



INVERTER TECHNOLOGY

1

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DUCTLESS TECHNOLOGY & PRINCIPLES• Operation principle

6

UTC Building & Industrial Systems Confidential and Proprietary Information – Not for Further DistributionUTC Building & Industrial Systems Confidential and Proprietary Information – Not For Further Distribution.UTC Building & Industrial Systems Confidential and Proprietary Information – Not For Further Distribution.


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A fixed speed compressor is susceptible to electrical damage

An inverter-driven compressor is less likely to fail at start-up because it sees a soft-start, making it more MORE RELIABLE

INVERTER TECHNOLOGY

8

UTC Building & Industrial Systems Confidential and Proprietary Information – Not for Further DistributionUTC Climate, Controls & Security Confidential and Proprietary Information– Not for Further Distribution

L1

L2

Rectifier Output from bridge rectifier

System ComponentsIPM (Intelligent Power Module)

P

N


DUCTLESS TECHNOLOGY & PRINCIPLESINVERTER TECHNOLOGY

9

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DUCTLESS TECHNOLOGY & PRINCIPLESDC INVERTER PRINCIPLES

Transforms alternating current to direct current through the rectifying circuit and then, by controlling IPM module, transforms direct current to alternating current whose frequency is controllable.



STRUCTURE AND OPERATION

1

10


• In heating mode, the temperature setting range is 61 F ~ 86 F

• The unit will adjust the running frequency of the compressor automatically according to the change of ambient temperature

• When the unit is turned off in HEAT mode, or switched to another mode, the four-way valve will be de-energized after the compressor is stopped

THE CONDITION AND PROCESS OF HEATING

DUCTLESS TECHNOLOGY & PRINCIPLESSTRUCTURE AND OPERATION


According to certain indoor/outdoor amb. temperature and the pipe temperature of outdoor condenser, defrosting will occur. There is no set time for defrost it is based on the algorithm of the board and the outdoor temperature of the system.

DEFROSTING

DUCTLESS TECHNOLOGY & PRINCIPLESDEFROSTING MODE

11

UTC Building & Industrial Systems Confidential and Proprietary Information – Not for Further DistributionUTC Building & Industrial Systems Confidential and Proprietary Information – Not For Further Distribution.UTC Building & Industrial Systems Confidential and Proprietary Information – Not For Further Distribution.11/9/2020 21

DUCTLESS TECHNOLOGY & PRINCIPLES1:1 HIGH WALL

80%

97%100%

0%

20%

40%

60%

80%

100%

120%

-30 -20 -10 0 10 20 30 40 50 60

Hea

tin

g C

apac

ity

(%

)

Outdoor Air Temperature FDB

DUCTLESS HIGH HEATING CAPACITY AT EXTREMELY LOW TEMPERATURES


PRODUCT OVERVIEW

2

SINGLE AND MULTI-ZONE

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NOMENCLATURE(PERFORMANCE)


38MA*R (1:1)

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SINGLE ZONE - RESIDENTIALPRODUCT OVERVIEW

14


SINGLE ZONE – LIGHT COMMERCIALPRODUCT OVERVIEW


SINGLE ZONEPRODUCT OVERVIEW

15


MULTI-ZONEPRODUCT OVERVIEW


MULTI-ZONEPRODUCT OVERVIEW

16



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RECENT UNITSPRODUCT OVERVIEW

RECENTLY RELEASED UNITS

40MHHQ Comfort High Wall Indoor Unit

Heat Pump

40MHHC Comfort High Wall Indoor Unit

Cooling Only


40MHHPRODUCT OVERVIEW

New design for better serviceability

18



Two screws holding cover down so no chance of breaking front panel



• Better wire sleeve to attach power wire

• Larger condensate sleeve to hold pipes

• Easier serviceability for fan• No covers need to be

removed for filter cleaning

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PRODUCT OVERVIEW

2

CONTROLS


CONTROLS

• Available on High Wall, Cassette, Ducted and Floor Console

• New display

• Same functionality as previous generation

• Plug and play

• Service tool imbedded– Heating temperature compensation

– Cooling temperature compensation

– Disable Auto-start function

PRODUCT OVERVIEW

NEW WIRELESS REMOTE CONTROLLER

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7 DAY PROGRAMMABLE THERMOSTATPRODUCT OVERVIEW


CONTROLS

Integration to Côr Wi-Fi Thermostat or any standard 5 wire thermostat

Côr Wi-Fi Thermostat.

PRODUCT OVERVIEW

MID-TIER 24V INTERFACE

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FUNCTION AND CONTROLS

3


FUNCTION AND CONTROLGENERAL CONTROLS

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FUNCTION AND CONTROLSELF CLEAN MODE

The Self Clean function enables the drying of the indoor coil after COOL or DRY mode to help prevent organic growth.

Under this function, the air conditioner automatically cleans and dries the evaporator.

This function can be activated only on COOL or Dry mode


SLEEP MODE

1. Available in cooling, heating and auto mode.

2. In cooling mode, the setpoint will increase 2 F, every hour for 2 hours (not to exceed 85 F). Indoor fan is fixed at low speed.

3. In heating mode, the setpoint will decrease 2 F, every hour for 2 hours (not to exceed 62 F). Indoor fan is fixed at low speed, and anti-cold-air function has priority.

4. In auto mode: the first hour the system remains in auto mode, the second hour heating set point will decrease by 2 F and cooling set point will increase by 2 F or If the system is in between those 2 temperatures the system remains in fan mode.

5. After 7 hours in sleep mode, the system will return to original set point and fan speed.

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SILENT MODE & DRY MODE

• Silent Mode1. Press FAN button for 2 seconds or longer on RC to activate

this function.2. Indoor fan will run at the minimum fan speed. Compressor

running frequency will be limited.3. If Silent mode is initiated, Turbo mode, 46 F heating or

Sleep mode will be cancelled.4. Pressing any button will stop Silent Mode.

• Dry Mode1. Indoor fan is fixed at low speed in dry mode2. Temperature setting is available.


SILENT MODE

• Silence mode allows fan to run at low fan speed which keeps indoor noise low.

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Press the LED button to turn the display light on and off

FUNCTION AND CONTROLLED LIGHT

INITIATING THIS FUNCTION

The LED Light allows for the display on the indoor unit to be turned on or off.


FUNCTION AND CONTROLTURBO MODE

The Turbo Mode function sets the fan at a high speed in order to meet a requested temperature as quickly as possible. The function will run until it meets the set temperature, or after 30 minutes.

This function is only available in COOLING/HEATING/AUTO mode

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TURBO MODE

• Available in cooling/Heating/Auto mode

• Turbo mode is activated by the Turbo button on RC

• Indoor fan is fixed at Turbo fan speed(anti-cold-air function is still valid in heating mode)

• The unit will quit turbo mode: – After running time reaches 30 minutes– Pressing turbo button again– Turn the unit off – Change modes


FUNCTION AND CONTROLFOLLOW ME

The Follow Me function communicates with the unit so that the temperature that appears at the remote control is where the reading occurs.

This function is available for DRY and FAN modes

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Press FOLLOW ME to activate or deactivate this function

• The remote controller will then send a signal to the PCB board every three minutes

• If the PCB board does not receive a signal from the remote for 7 minutes the unit will exit the Follow Me function

• To exit press the follow me button again

FUNCTION AND CONTROLFOLLOW ME

INITIATING THESE FUNCTIONS


EMERGENCY OPERATION

• Emergency auto mode:– Forced auto mode is the same as normal auto mode with a fixed setpoint of 75 F.– When system receives signals, such as On, Off, Timer on, Timer off, Mode, Fan

speed, Sleep mode or Follow me, Forced operation will cancel.

• Emergency cooling mode:– For the first 30 minutes after entering Emergency Cooling mode, the compressor

and outdoor fan run fixed at F2, and the indoor fan will run at SL speed. After running for 30 minutes, the system will switch to auto mode with a fixed 75 F setpoint. Indoor will display FC.

Forced auto →Forced cooling →Off

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46° F HEATING SETBACK (FP)

• In heating operation, the preset temperature of the air conditioner can be 46 F, which keeps the room temperature steady at 46 F and prevents household things freezing when the house is unoccupied for a long time in cold weather.

• Indoor fan fixed at medium speed.

• Anti-cold-air function is void.

• The unit will exit 46F mode when any button on remote control is pressed


AUTO RESTART

• If power loss occurs, the unit will restart, when power returns with same mode, setpoint, fan speed, swing, on/off or forced operation and settings after 3 minutes.

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AUTO RESTART - OFF SWITCH

• Ducted, Cassette and Floor Console

Auto restart function ： Todisable auto restart function,turn SW4 switch on.


IU A

IU B

OU

MULTI-ZONE SYSTEM CHANGEOVER

• Heating Priority is the standard

• If any unit is set into heating mode the system switches to heat

• (---) indicates standby when a heating command is being performed. It is not an error code it is simply standby until heating command can be met.

• All units must be set in cooling or fan mode for the system to cool

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REFRIGERANT LEAK DETECTION FUNCTION

• The indoor unit will show error code “EC” and stop automatically when refrigerant loss is detected. This function can better protect compressor from being damaged by high temperature due to refrigerant loss.


REFRIGERANT LEAK DETECTION FUNCTION

1. Only available in cooling mode for 1 to 1 systems.2. T2: indoor coil temp. Tcool: sample temp. of T2 when compressor starts

• During the first 5 minutes after compressor start, if the situation that indoor coil temp ＜ sampling temp -3.6 F does not last for 4 seconds continuously, the system will record suspected refrigerant loss once, and the compressor will stop.

• If the above case happens three times consecutively, the system will judge refrigerant loss. Indoor unit will indicate error code “EC” and the unit will be turned off.

• Refrigerant loss count will reset under the following condition:1. During the first 5 minutes after compressor’s starts, the condition that

indoor coil temp ＜ sampling temp -3.6 F for 4 seconds continuously.2. Evaporator anti-freeze protection in cooling mode.3. Non-cooling mode.

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FORCED DEFROST

• Press AUTO/COOL button continuously for 5 seconds under forced cooling mode to enter this mode.

• The indoor fan will stop and the defrosting lamp will turn on.

• To exit Forced Defrost mode: – Normal defrosting stops– Turn off by remote control – Press AUTO/COOL button continuously for 5 seconds again


ANTI COLD AIR FUNCTION

• Conventional anti-cold function works only by evaporator temperature.

• Anti-cold air function works by both evaporator and ambient temperature, more accurate control ensure comfortable feeling

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ADJUSTABLE ANTI COLD AIR FUNCTION

• Cold Blow Prevention

TE1 82 86

TE2 86 90

TE3 75 82

TE4 59 75

TE5 90 95

TE6 86 90


ADJUSTABLE TEMPERATURE COMPENSATION

A dip switch is available for selection of temperaturecompensation in heating mode. This helps to reduce the realtemperature difference between ceiling and floor so that theunit could run properly. If the height of installation is lower, ansmaller value could be chosen.

Ranges: Listed in Celsius

Cassette

Ducted

Floor Console

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CRANKCASE AND BASEPAN HEATER

A. 20W Crankcase Heater energizes when T4 ＜ 37 F (3 C), de-energizes when T4 ＞ 46 F ( 8 C).

B. 85W Basepan Heater cable energizes when compressor is off and T4 ＜ 37 F (3 C), de-energizes when T4 ＞ 46 F (8 C) to help prevent with ice build up in base pan.


BUILT IN CONDENSATE LIFT PUMP

• 27” Condensate Lift

30”

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DEFINITION OF TEMPERATURE SENSORS

• T1(RAT): Indoor room temperature• T2(ICT): Indoor heat exchanger temperature• T2B(ICTB): Indoor heat exchanger out temp. (Multi Only)• T3(OCT): Condenser(outdoor heat exchanger) temperature• T4(OAT): Outdoor ambient temperature• T5(CTT): Compressor discharge temperature• Ts: Setting temperature by RC• Td: Target temperature control by microprocessor

• Td=Ts+Δt1+Δt2+Δt3• Δt1: correction by turbo mode• Δt2: correction by follow me function• Δt3: correction by temperature compensation in heating mode


PROTECTION

• Compressor discharge temperature protection.– 215F<Td<239F, the system will start to limit

frequency, then decrease frequency one step every 2 minutes, running at F1 continuously if frequency reaches F1. F1= Minimum frequency

– Td<194F, system will release the frequency limit and run at target frequency.

– Td>239F for 10s, the compressor stops. When Td<194 F, compressor will restart.

• This is to protect the inverter compressor.

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PROTECTION

• Pressure Protection:– When the discharge pressure is higher than

638PSI, the outdoor unit will stop. When the discharge pressure is lower than 464 PSI, the outdoor will restart.

– When the suction pressure is lower than 20 PSI, the outdoor unit will stop. When the suction pressure is higher than 44 PSI, the outdoor will restart.


PROTECTION

• Evaporator Freeze protection in cooling & dry mode: – If T2<39F, frequency decreases every

1 min., frequency will not rise when 39≤T2≤43,

– Normal operation occurs when T2>44.6F, if T2<32F, compressor will stop and not resume until T2 ≥41

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4

INSTALLATION


INSTALLATIONINSTALLATION MANUALS

Installation of Ductless units are outlined in the install manuals that comes with each indoor unit

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INSTALLATIONWALL MOUNT UNIT - PREPARATION

THINGS TO NOTE:• Cannot be installed hanging from ceiling or stacked

• If there is a potential for accumulated snow to block the outdoor unit, install the unit on a wall bracket if applicable

• R-410A refrigerant is a safe, nontoxic and nonflammable refrigerant. However, if there is a concern about a dangerous level of refrigerant concentration in the case of refrigerant leakage, add extra ventilation

• Avoid installing the outdoor unit where corrosive gases, such as sulfur oxides, ammonia, and sulfurous gas, are not produced. If unavoidable, consult with an installation specialist about using a corrosion-proof or anti-rust additive to protect the unit coils



SELECTING A LOCATION• Choose a place solid enough to bear the weight and vibration of the unit and

where the operation noise will not be amplified

• Choose a location where the hot air discharged from the unit or the operation noise and will not cause a nuisance to the neighbors of the user

• There must be sufficient space for carrying the unit into and out of the site

• There must be sufficient space for air passage and no obstructions around the air inlet and air outlet

• The site must be free from the possibility of flammable gas leakage in a nearby place

• Install units, power cords and inter-unit cables at least 10ft away from television and radio sets. This is to prevent interference to images and sounds

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INSTALLATIONPRE-PLANNING

• Unit Placement

• Electrical Power

• Sizing and Connection

• Refrigerant Piping

• Condensate Handling

• Service and Maintenance


INSTALLATIONGENERAL CONSIDERATIONS

ELECTRICAL POWER

SERVICE AND MAINTENANCE CLEARANCES

Follow all local codes and regulations when installing electrical wiring and refer to all requirements specified in the installation instructions.

Make sure there are adequate clearances for future maintenance and service. Allow enough room to access the condensate pump, electrical control box, and any other clearances specified in the installation instructions.

38



INSTALLATIONPREPARATION

ELECTRICAL POWERMaintain at least a 10 foot separation between TV and Radio wiring and the power to the indoor unit. • 14 Gauge AWG stranded wire should be used to make the electrical connection

between indoor and outdoor units. This wiring will serve to power the indoor unit and establish a communication link between indoor and outdoor units. The wiring is connected at the indoor unit electrical terminal blocks screws L1, L2, S and ground.

• There should be no splices in the wires connected to terminals L2 or S as these serve as communication signal wires and electrical power connections.

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40




TOOLS FOR INSTALLATION:

• Drill

• Hole Saw 3”

• Vacuum pump

• Soap-and-water solution or leak tester

• Torque wrench (17mm, 22mm, 26mm)

• Tubing cutter

• Flaring tool

• Razor knife

• Measuring tape

• Level

• Micron gauge

• Nitrogen

• Mini-Split AD-87 Adapter (1/4” to 5/16”)

• Electrical wiring

• Drain hose (Included)

41


INSTALLATIONWALL MOUNT UNIT

ATTACHING MOUNTING PLATE TO THE WALL

STEP 1 Using a stud sensor, locate and mark the stud position where the unit will be mounted

Place the mounting plate on the wall in the desired location. Using a level, verify the mounting plate is horizontal and mark the screw locations

STEP 2

STEP 3 Screw the mounting plate to the wall

Knockouts are provided on the case for Left, Right, and Right Below piping routingSTEP 4




STEP 5 Measure and mark the location where the piping hole will be drilled

Drill the piping hole using a saw of the correct diameter. Angle the drill with a downward pitch to the outside wall so that the hole will be ¼” lower than the inside hole, giving the hole the proper angle for drainage

STEP 6

STEP 7 Install the piping hole cover flange at the hole opening on the inside wallNOTE: The cover flange may require modification to fit properly

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STEP 8a Bundle the refrigerant piping, drain piping, and wiring with tape

Pass the bundle through the piping holeNOTE: When bundling the power cable, leave sufficient length available in the indoor unit to make the connections to the terminal block

STEP 8b



ATTACHING INDOOR UNIT TO THE WALL PLATE

STEP 1

• Hang the indoor unit on the upper hooks of the mounting plate

• Rotate the lower portion of the indoor unit to the mounting plate and lower the unit onto the lower hooks of the plate

• Verify it is secure

• Slightly raise the unit vertically• Pull the lower portion of the unit off the lower

hooks of the mounting plate and away from the wall

• Lift the upper portion of the unit off the upper hooks of the wall plate

STEP 2

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ELECTRICAL CONNECTIONS FOR THE INDOOR UNIT

85

STEP 1 Raise the front cover of the indoor unit to access the screws needed to remove two cover plates

Access the three conductor cables through the cover plate opening and make the wiring connections noting the wire color used on each terminal

STEP 2

Failure to wire the system correctly may lead to improper operation or component damage


44


INSTALLATIONCASSETTE - PREPARATION

THREADED ROD MOUNTING

The Cassette unit should be mounted to the building structure using threaded rods. The threaded rods should have washers and nuts.

The threaded rods and attachment brackets are field supplied items. The materials required for mounting to the brackets on the cassette assembly include:

• 4- 3/8 Threaded Rods

• 4- Mounting Brackets

• 8- 3/8 Washers

• 8- 3/8 Nuts (Double nut the assembly)



CONDENSATE HANDLING

The Cassette unit has a built in condensate lift pump and water level safety switch. There is no option for gravity drain. The condensate lift pump is rated to lift water up to 12” from the point of discharge on the cassette assembly.

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CONDENSATE PUMP

• Integrated Lift Pump• Maximum 30” Lift



AIR DELIVERY CLEARANCES

Standard clearances for cassette air handlers require 5 feet of clearance in each direction. There should be 8 feet of clearance from the face of the cassette louver to the floor. Inadequate clearances can cause system freezing and temperature control problems.

H=10”

46


INSTALLATIONCASSETTE

STEP 1

• Use cardboard template to locate center point of cassette for mounting

• Use a plumb bob and string to position cassette by referencing center hole of template

• Mark the mounting positions of the threaded rods using the guides on the cardboard template

Install the threaded rods to the structure using appropriate fastenersSTEP 2



STEP 3Lift the cassette and position the threaded rods into the 4 mounting clips on each corner of the cassette unit

Using a level, adjust the nuts on the threaded rods to obtain a level reading across the bottom of the cassette unitSTEP 4

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STEP 5

• Prior to routing the refrigerant lines to the unit, install the supplied flare nuts onto the refrigerant lines

• Using a flaring tool, flare the refrigerant lines• Remove the caps attached to the ends of the

refrigerant line connections at the cassette. Holding gas should leak out.

• Tighten refrigerant line flare nuts to cassette unit

• Connect the grey flexible drain hose supplied with the cassette unit to the condensate pump discharge pipe of the cassette

• Tighten the clamp securely. Using ¾” PVC, connect the flexible hose to the building’s condensate drain system

STEP 6



DRAIN PIPE SETUP1. Ceiling slab

2. Hanger bracket

3. Adjustable range

4. Drain raising pipe

5. Drain hose

6. Metal clamp

• Connect the drain hose to the drain raising pipes, and insulate them.

• Connect the drain hose to the drain outlet on the indoor unit, and tighten it with the clamp.

Note: Drain setup pipe:

• The install height of the drain raising pipe should be less than 21 in. (530 mm)

• The drain raising pipe should form a right angle with the unit. The distance to the unit should not exceed 11.81 in. (300mm)

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INSTALLATIONCASETTE - GRILL CONNECTION


INSTALLATIONCASETTE – MBQB*C GRILL

49


4

INSTALLATIONOUTDOOR UNIT


INSTALLATIONOUTDOOR UNIT PREPARATION

GENERAL CONSIDERATIONS

• Always make sure to follow recommended clearances for proper maintenance and to ensure discharge and intake of outdoor unit are clear

• Do not use in spaces with corrosive, hazardous, or flammable chemicals

• Install the unit vertically and horizontally level on a pad or raised off the ground

• In high snow areas, it is recommended that units be installed off of a sidewall to prevent snow build-up around the unit

• The preferred installation location is well ventilated

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INSTALLATIONOUTDOOR UNIT PREPARATION

CLEARANCES


51


INSTALLATION

38MGR Multi-zone Size 18K 24K 30K 36K 48K

Min. Piping Length per each indoor unit ft. (m) 10 (3) 10 (3) 10 (3) 10 (3) 10 (3)

Standard Piping Length per each indoor unit ft. (m) 25 (7.5) 25 (7.5) 25 (7.5) 25 (7.5) 25 (7.5)

Max. outdoor-indoor height difference(OU higher than IU)

ft. (m) 49(15) 49(15) 49(15) 65(20) 65(20)

Max. outdoor-indoor height difference(IU higher than OU)

ft. (m) 49(15) 49(15) 49(15) 65(20) 65(20)

Max. height different between indoor units ft. (m) 32 (10) 32 (10) 32 (10) 32 (10) 32 (10)

Max. Length per each indoor unit ft. (m) 82 (25) 98 (30) 115(35) 115(35) 115 (35)

Max. Piping Length with no additionalrefrigerant charge per System(Standard Piping length x No. of Zones)

ft. (m) 49 (15) 74 (22) 98 (30) 123 (37.5) 123 (37.5)

Total Maximum Piping Length per system ft. (m) 131(40) 197(60) 263(80) 328(100) 328(100)


PIPING INSTALLATION

• Maximum Lengths (1 to 1 systems)Capacity Total Length (ft) Height (ft)

9,000 82 32

12,000 82 32

18,000 98 65

24,000 98 65

30,000 164 82

36,000 164 82

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SET THE OUTDOOR UNIT

STEP 1 Set the unit on a wall mount

If the unit is located in an area where freezing can occur, do not install the rubber drain fitting onto the bottom of the unit.

If the area stays above freezing: Insert the drain fitting and make sure the outdoor unit is installed level and is stable.



CONDENSING UNITS

Should be installed above the local Snow Line and with the proper clearances

53



DO NOT INSTALL THE FOLLOWING

Unless you have been instructed by the factory:

• Install Driers

• Sight Glasses

• Solenoid Valves

• Other components in the piping network

**Ball Valves are the only exception



PIPING CONNECTION

STEP 1Follow standard practices for creating pipe flares. When cutting and reaming the tubing, use caution to prevent dirt or debris from entering the tubing.

To join the line set piping together, directly align the piping flare to the fitting on the other pipe, then slide the nut onto the fitting and tighten. Misalignment may result in a leaking connection

STEP 2

Two wrenches are required to join the flare connections, one standard wrench, and one torque wrench

STEP 3

Refrigerant piping connections for the mini-split system are made utilizing flare connections:

54



PIPING INSTALLATION

• Ensure that the pipe cutter is perpendicular to pipe toavoid piping deformation through use of excessive force

Correct Incorrect

55


PIPING INSTALLATION

• Always deburr a pipe facing downwards

CrackDouble Surface


Flare is standard 45 degree flare used for R-410a

Factory flare nuts/unions have metric threads

INSTALLATIONIndoor Unit Piping

CONNECTION AND CENTERING

56



Standard Flare

Dedicated R-410A flares are deeper so as to withstand the higher pressure of R-410A

Both are 45

410-A Flare

WHY A DEDICATED R410A FLARING TOOL?



R-410a Flaring Tool

R410A systems operate at high pressures

• The clutched handle prevents the crushing of the copper tube at the point of the flare. This helps maintain the strength and integrity of the copper tubing so it will withstand the higher operating pressures.

• The concentric cone helps make a uniform flare and reduces the thinning of the tube wall, this also eliminates the need of oil on the inside of the flare which can result in contamination and acid formation within the operating system.

WHY A DEDICATED R410A FLARING TOOL?

57



Connecting Pipe

Outer Dia. (in)Ft-lbs

Ø1/4” 10 to 13

Ø3/8” 24 to 31

Ø1/2” 37 to 46

Ø5/8” 50 to 60


WHAT IS WRONG WITH THIS PICTURE?Installation

58



LEAK TESTPressure test piping to 500 psig for 1 hour

TRIPLE EVACUATION:

Evacuate to 1500 microns

Pressure back to 0 psig

with dry nitrogen


Pressure back to 0 psig

withdry nitrogen


minimum

Perform hold test for 30 minutes

Triple Evacuation


CHARGING AND EVACUATION MULTI-ZONE

All Multi-zone units (except the 18,000 BTU model) have a Master Suction and Liquid Line Service Valve.

59




CHARGING• Charge the system using the weight method.

• If the system must have additional refrigerant added, add the recommended charge as stated in the installation manual by the weight method.

Always charge the system with a liquid, not a gas.

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MULTI-ZONE CHARGE CHART


DO NOT INSTALL unless you are specifically asked to do so by factory support staff.

INSTALLATIONOutdoor Unit Piping

FILTER DRIERS:

61



SYSTEM TEST

No gas leak from line sets?

Are the line sets insulated properly?

Are the connecting wirings of indoor and outdoor firmly inserted to the terminal block?

Is the wiring of indoor and outdoor firmly fixed?

Is condensate draining correctly?

Is the ground wire secure? Is the indoor unit secured?

Is power source voltage correct according to local code?

Is there any noise?

Are cooling and heating performing normally?

Is the operation of room temperature sensor normal?


4

INSTALLATIONWIRING

62


INSTALLATIONWIRING

ALL WIRING MUST BE SIZED PER NEC OR CEC AND LOCAL CODES

Recommended connection method:

• Main power is supplied to outdoor unit

• Field supplied 14/3 stranded wire should be used. It consists of four wires and provides power for the indoor unit.

• Wiring between indoor and outdoor unit is polarity sensitive


INSTALLATIONWIRING

• Verify solid ground connection (only connect if dedicated circuit)

• Always use color coded or labeled wire

• All wiring sizes, breaker sizes, disconnect requirements should be done in accordance with NEC, CEC or Local Code

63



INSTALLATION

• Multi-zone wiring example

Using color coded and labeled wire is critical to a correct multi-zone installation

A BDC

E

64


INSTALLATION

• Multi-zone wiring 5 zone example


INSTALLATIONWIRING

POWER WIRING

Inverter systems typically use 14/4

CONTROL WIRING

Stranded and shielded wire only

65


INSTALLATIONWIRING

• Please see installation manual for wiring method and control wire specification


4.5

INSTALLATIONWHAT IS WRONG WITH THESE PHOTOS?

66


INSTALLATIONWHAT IS WRONG WITH THIS PICTURE?



67





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CONDENSING UNITS

Should be installed above the local Snow Line and with the proper clearances


START UP

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START UPMINI-SPLIT INSTALLATION

STEP 1 Apply power to the outdoor disconnect from the house electrical breaker panel

Insert the disconnect at the outdoor unitSTEP 2

NOTE: When power is applied you should hear a series of clicking from the outdoor unit. These noises are the board and the electronic valves being energized.



EXAMPLE: 208/230 volt unit needs a supply power of 187-256 AC volts

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STEP 3 Check power supply at the outdoor unit Terminals L1 and L2. Power will read between 210-240 Volts AC

Check the power at the indoor unit. There should be the same supply voltage to L1 and L2 as power supply to the outdoor unit.

STEP 4

NOTE: Be sure to check between Terminals L1 and L2 and not each leg to the ground



STEP 5 Turn the unit on with the remote by pressing the power button. It will be a large orange button

• The unit will beep to let you know it received the signal from the remote

• The display will come on and the air louvers will open

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STEP 6 Set up the unit to one of the following modes:

• Cool (snowflake)• Heat (sun)

After the indoor unit is turned on there will be a 30 second time delay for the outdoor unit to come on

Wait 5 minutes for the compressor to reach full speed



STEP 7 Check the TD in “COOL”. If the TD is between 20-30 degrees, your charge is correct (TD= Temp in – Temp out) Temperature Differential

Check the TD in “HEAT” mode. If the TD is between 30-40 degrees, your charge is correct. You will see this when temperature is above 30° F.

STEP 8

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STEP 9 Test the unit in both heating and cooling, if weather permits

• After selecting the mode, select the desired room temperature

• For testing purposes: lower the temperature all the way in cooling or raise it all the way for heating

• Set the fan to “High” by pressing the “Fan” Button


Troubleshooting

Troubleshooting is a form of problem solving, often applied to

repair failed products or processes….Determining the

most likely cause, is a process of elimination.

WHAT IS TROUBLESHOOTING?

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Error Diagnosis

VS

Flow Charts

REAL WORLD

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• P=Outdoor

• E=Com. Error

• F=Temp Sensor Related

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THANK YOU!

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