Heat Controller A-VMH27TC-1, A-VMH18DC-1, A-VMH36QC-1 User Manual

4 (1)

SERVICE MANUAL

Inverter Flex Multi-Zone

Ductless Mini Split

Outdoor Section

A-VMH18DC-1

A-VMH27TC-1

A-VMH36QC-1

Heat Controller, Inc. • 1900 Wellworth Ave. • Jackson, MI 49203 • (517)787-2100 • www.heatcontroller.com

Service Manual

VMH Series

Heat Controller, Inc.

 

 

 

 

CONTENTS

 

1.General Information of Outdoor Units...........................................................

3

2.

Features...........................................................................................................

4

3.

Dimensions......................................................................................................

5

4.

Wiring Diagram................................................................................................

6

5.

Refrigeration Cycle Diagram..........................................................................

8

6.

Indoor unit Combinations............................................................................

10

7.

Installation Details........................................................................................

11

8.

Electronic Control Function.........................................................................

20

9.

Troubleshooting............................................................................................

25

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Heat Controller, Inc. VMH Series Service Manual

1. General information of Outdoor Units

Model name

Dimension mm(in)

Compressor

 

 

 

A-VMH18DC-1

845x320x700(33.3x12.6x27.6)

DA130S1C-20FZ

 

 

 

A-VMH27TC-1

845x320x700(33.3x12.6x27.6)

DA150S1C-20FZ

 

 

 

A-VMH36QC-1

990x345x965(39x13.6x38)

TNB306FPGMC-L

 

 

 

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Service Manual

VMH Series

Heat Controller, Inc.

 

 

 

2 Features

Outdoor unit

Power relay control

Low noise air flow system

Hydrophilic aluminum fin

The hydrophilic fin is corrosion resistant and improves heating efficiency in heat mode by absorbing the water on its surface and by spreading the water instead of forming water droplets.

4 way valve control

Operates only in heating mode except during defrosting.

Anti-rust cabinet

Valve protection cover

It protects the valves and prevents water from dripping in the cabinet.

Discharge pipe temperature protection

Compressor crankcase heater

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Heat Controller, Inc.

VMH Series

Service Manual

 

 

 

3. Dimensions

 

 

 

 

 

 

mm(in)

 

 

 

 

 

 

 

Model

W

D

H

W1

A

B

 

 

 

 

 

 

 

A-VMH18DC-1

845((33.3)

320(12.6)

700(27.6)

908(35.7)

560(22)

335(13.2)

 

A-VMH24TC-1

 

 

 

 

 

 

 

 

 

 

 

 

 

A-VMH36QC-1

990(39)

345(13.6)

965(38)

1075(42.3)

624(24.6)

366(14.4)

 

 

 

 

 

 

 

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Heat Controller A-VMH27TC-1, A-VMH18DC-1, A-VMH36QC-1 User Manual

Service Manual

VMH Series

Heat Controller, Inc.

 

 

 

4. Wiring Diagram

4.1 A-VMH18DC-1

4.2 A-VMH27TC-1

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Heat Controller, Inc.

VMH Series

Service Manual

 

 

 

4.3 A-VMH36QC-1

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Service Manual

VMH Series

Heat Controller, Inc.

 

 

 

5. Refrigeration Cycle Diagram

8.1 Refrigeration circuit drawing of inverter dual zone: A-VMH18DC-1

INDOOR

 

OUTDOOR

 

 

LIQUID VALVE A

EXV A CAPILIARY A

 

 

CHECK VALVE

 

 

 

 

 

LIQUID VALVE B

EXV B CAPILIARY B

T3

 

 

 

 

 

Condenser

 

 

CAPILIARY TUBE

temp. sensor

 

 

 

HEAT

 

 

HEAT

EXCHANGE

T1 Room

T4 Ambient

(EVAPORATOR)

EXCHANGE

temp. sensor

temp. sensor

(CONDENSER)

 

 

 

T2 Evaporator

GAS VALVE A

 

 

temp. sensor

 

 

 

 

 

4-WAY VALVE

 

 

GAS VALVE B

 

 

 

 

Accumulator

 

 

 

T5 Discharge

 

 

 

temp. sensor

COOLING

 

 

Compressor

 

 

 

HEATING

5.2Refrigeration circuit drawing of inverter tri-zone: A-VMH27TC-1

INDOOR

 

 

OUTDOOR

 

 

LIQUID VALVE A

EXV A CAPILIARY A

 

 

 

 

 

 

 

LIQUID VALVE B

EXV B CAPILIARY B

CHECK VALVE

 

 

 

 

 

 

 

EXV C CAPILIARY C

 

T3

 

LIQUID VALVE C

 

Condenser

 

 

 

 

 

 

CAPILIARY TUBE

temp. sensor

 

 

 

 

HEAT

 

 

 

HEAT

EXCHANGE

T1 Room

 

T4 Ambient

 

EXCHANGE

(EVAPORATOR)

temp. sensor

 

temp. sensor

 

(CONDENSER)

 

 

 

 

T2 Evaporator

GAS VALVE A

 

 

 

 

 

 

 

temp. sensor

 

 

 

 

 

GAS VALVE B

 

4-WAY VALVE

 

 

 

 

 

 

GAS VALVE C

 

 

 

 

 

Accumulator

T5 Discharge

COOLING

 

 

 

temp. sensor

 

 

 

HEATING

 

 

Compressor

 

 

 

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Heat Controller, Inc.

 

 

 

 

 

 

 

 

 

VMH Series

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Service Manual

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

8.3 Refrigeration circuit drawing of inverter Quad-zone: A-VMH36QC-1

 

 

 

 

 

 

INDOOR

 

 

 

OUTDOOR

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

EXV A CAPILIARY A

LIQUID VALVE A

 

 

 

 

 

 

 

 

 

 

 

 

 

LIQUID VALVE B

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

LIQUID VALVE C

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

HEAT

 

 

 

 

 

 

 

 

 

 

 

 

LIQUID VALVE D

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

EXCHANGE

 

 

 

 

 

 

 

 

 

 

 

 

 

T1 Room

(EVAPORATOR)

 

 

 

 

 

 

 

 

 

 

 

 

temp. sensor

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

GAS VALVE A

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

T2 Evaporator

 

 

 

 

 

 

 

 

 

temp. sensor

 

 

 

 

 

 

 

GAS VALVE B

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

GAS VALVE C

GAS VALVE D

EXV B CAPILIARY B

 

 

 

CHECK VALVE

 

EXV C CAPILIARY C

 

 

 

 

T3

 

 

Condenser

EXV D CAPILIARY D

CAPILIARY TUBE

temp. sensor

 

 

 

T4 Ambient

HEAT

 

EXCHANGE

 

temp. sensor

 

(CONDENSER)

 

 

 

4-WAY VALVE

 

Accumulator

 

 

 

High pressure

COOLING

 

switch

Low pressure

T5 Discharge

HEATING

temp. sensor

 

switch

Compressor

 

 

 

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Service Manual

VMH Series

Heat Controller, Inc.

 

 

 

6. Indoor units combination

NOTE: The total capacity of indoor air handlers can not exceed the nominal capacity of the outdoor unit. The minimum quantity of indoor air handlers is one on any outdoor unit, whether it is a dual, tri, or quad zone.

6.1 Indoor unit combinations for A-VMH18DC-1

Comb.

Combinations

Unit A

Unit B

 

Dual(1x1)

9k

12k

 

18k

Dual (1x2)

9k

9k

9k

12k

 

6.2Indoor unit combinations A-VMH27TC-1

Comb.

Combinations

Unit A

Unit B

Unit C

 

TRI (1x1)

9k

12k

 

18k

 

9k

9k

TRI (1x2)

9k

12k

9k

18k

 

 

12k

12k

TRI (1x3)

9k

9k

9k

6.3Indoor unit combinations A-VMH36QC-1

Comb.

 

Combinations

 

Unit A

Unit B

Unit C

Unit D

 

QUA (1x1)

9k

12k

 

18k

 

9k

9k

 

9k

12k

QUA (1x2)

9k

18k

12k

12k

 

 

12k

18k

 

18k

18k

 

9k

9k

9k

QUA (1x3)

9k

9k

12k

9k

9k

18k

 

9k

12k

12k

 

12k

12k

12k

QUA(1x4)

9k

9k

9k

9k

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Heat Controller, Inc. VMH Series Service Manual

7. Installation Details

7.1 Wrench torque sheet for installation

Outside diameter

Torque

Additional tightening torque

mm

inch

N.m

N.m

Ф6.35

1/4

15(153kgf.cm)

16(163kgf.cm)

Ф9.52

3/8

25(255kgf.cm)

26(265kgf.cm)

Ф12.7

1/2

35(357kgf.cm)

36(367kgf.cm)

7.2 Connecting the cables

The power wiring should always follow NEC and local codes, with respect to the unit’s, rating plate. See installation manual for additional information. Main power connection is 208/230V/1PH~60HZ.

The communicating cable, which connects between the indoor and outdoor units must meet all NEC and local codes, with respect to the unit’s rating plate. We recommend using 14 AWG/4 conductor Stranded THHN 6 Ф Ф V cable.

Pipe length and elevation

 

Pipe size

Standard

 

 

Max.

 

Max.

 

Additional

Unit

 

 

 

 

length

 

Elevation

 

Length

 

refrigerant

Gas inch

Liquid inch

 

(mm)

(mm)

 

 

(m)

 

B (m)

 

A (m)

 

(g/m)

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

9K

3/8’’ (Ф9.52)

1/4’’ (Ф6.35)

(5)

 

(10)

 

 

 

(15)

 

 

(20)

 

 

 

 

 

16.5ft

 

 

33ft

 

50ft

 

0.2 oz/ft

12K/18K

1/2’’ (Ф12.7)

1/4’’ (Ф6.35)

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Max. Total length for all rooms

 

Dual-zone(m)

 

 

Tri-zone(m)

 

Quad-zone(m)

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

(30)100ft

 

 

(45)150ft

 

 

(60)200ft

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

2XWGRRU XQLW

 

 

 

 

 

 

 

 

 

 

 

 

 

 

$

 

 

 

 

 

 

 

 

 

 

 

 

 

2LO WUDS

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

,QGRRU XQLW

%

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

NOTES:

Capacity test is based on standard length and maximum allowance length is based on reliability.

Oil trap should be installed per (3-5 meters)10-15ft.

Outdoor connections are ¼” (Ф6.35 mm) liquid and 3/8” (Ф9.52 mm) gas, therefore a reducer is provided with all 12/18k indoor sections.

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7.4 Installation for the first time

Air and moisture in the refrigerant system have undesirable effects as indicated below:

Pressure in the system rises.

Operating current rises.

Cooling or heating efficiency drops.

Moisture in the refrigerant circuit may freeze and block capillary tubing.

Water may lead to corrosion of parts in the refrigerant system.

Therefore, the indoor units and the pipes between indoor and outdoor units must be leak tested and evacuated to remove gas and moisture from the system.

Gas leak check (Soap water method):

Apply soap water or a liquid neutral detergent on the indoor unit connections and outdoor unit connections with a soft brush to check for leakage on the connecting points of the piping. If air bubbles come out, the connections have leaks and those connection points must be tightened. Recheck to ensure all leakage points are tightened properly and not leaking.

1. Air purging with vacuum pump

(Indoor unit)

(Liquid side)

(Outdoor unit)

 

 

Two-way valve

 

 

Close

 

(Gas side)

 

 

 

Three-way valve

Manifold valve

Close

Compound meter

 

 

 

Pressure

 

-0.1MPa

gauge

 

 

 

Lo

Hi

 

Handle Lo

Handle Hi

 

Charge hose

Charge hose

 

Vacuum

 

 

pump

 

 

Vacuum

 

 

pump

 

 

1)Completely tighten the flare nuts of the indoor and outdoor units, confirm that both the 2-way and 3-way valves are set to the closed position.

2)Connect the charge hose with the push pin of handle lo to the 3-way valves gas service port..

3)Connect the charge hose of handle hi connection to the vacuum pump.

4)Fully open the handle Lo of the manifold valve.

5)Operate the vacuum pump to evacuate.

6)Conduct evacuation for 30 minutes and check whether the compound meter indicates -0.1Mpa. If

the meter does not indicate -0.1Mpa after pumping 30 minutes, it should be pumped 20 minutes more. If

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the pressure can’t achieve -0.1Mpa after pumping 50 minutes, please check if there are some leakage points. Once the meter indicates -0.1mpa, fully close the handle Lo valve of the manifold valve and stop the operation of the vacuum pump. Confirm that the gauge needle does not move (approximately 5 minutes after turning off the vacuum pump).

7) Turn the flare nut of the 3-way valves about 45° counterclockwise for 6 or 7seconds after the gas

comes out, then tighten the flare nut again. Make sure the pressure display in the pressure indicator is a little higher than the atmospheric pressure. Then remove the charge hose from the 3 way valve.

8) Fully open the 2 way valve and 3 way valve and securely tighten the cap of the 3 way valve.

2. Air purging by refrigerant

Procedure:

1). Confirm that both the 2-way and 3-way valves are set to the closed position.

2). Connect the charge set and a charging cylinder to the service port of the 3-way valve.

3). Air purge by open the valves on the charging cylinder and the charge set. Purge the air by loosening

the flare nut on the 2-way valve approximately 45° for 3 seconds then closing it for 1 minute; repeat 3

times. After purging the air, use a torque wrench to tighten the flare nut on the 2-way valve.

4). Check for gas leakage by checking the flare connections using the soap water method.

5). Discharge the refrigerant by closing the valve on the charging cylinder and discharging the refrigerant

by loosening the flare nut on the 2-way valve approximately 45° until the gauge indicates 0.3 to 0.5 Mpa.

6). Disconnect the charge set and the charging cylinder, and set the 2-way and 3-way valves to the open

position.

Be sure to use a hexagonal wrench to operate the valve stems.

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7). Replace the valve stems nuts and the service port cap that were previously removed.

Be sure to use a torque wrench to tighten the service port cap to a torque of 18N·m.

Be sure to check for gas leakage using soap water.

3. Adding the refrigerant if the pipe length >(5m)16.5ft

Electronic scale

Procedure:

1). Connect the charge hose to the charging cylinder, open the 2-way valve and the 3-way valve. Connect the charge hose which you disconnected from the vacuum pump to the valve at the bottom of the cylinder. Because refrigerant is R410A, turn the cylinder upside down, ensuring the bottom is upward, to create a liquid charge.

2). Purge the air from the charge hose.

Open the valve at the bottom of the cylinder and press the check valve on the charge set to purge the air (be careful of the liquid refrigerant).

3)Put the charging cylinder onto the electronic scale and record the weight.

4)Operate the air conditioner in the cooling mode.

5)Open the valves (Low side) on the charge set and charge the system with the proper amount (refer to table) liquid refrigerant.

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VMH Series

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6).When the electronic scale displays the proper weight (refer to the table), disconnect the charge hose

from the 3-way valve’s service port immediately and turn off the air conditioner before disconnecting the

hose.

7). Replace the valve stem caps and the service port that were previously removed. Use torque wrench to tighten the service port cap to a torque of 18N.m.

Be sure to check for gas leakage using soap water.

7.5 Adding the refrigerant due to loss of charge

Electronic scale

Procedure:

1). Connect the charge hose to the 3-way service port, open the 2-way valve and the 3-way valve. Connect the charge hose to the valve at the bottom of the cylinder. Because the refrigerant is R-410A, turn the cylinder upside down, such that the bottom is upward, to ensure a liquid charge.

2). Purge the air from the charge hose.

Open the valve at the bottom of the cylinder and press the check valve on the charge set to purge the air (Do not vent refrigerant into the atmosphere).

3)Put the charging cylinder onto the electronic scale and record the weight.

4)Operate the air conditioner in the cooling mode.

5)Open the valves (Low side) on the charge set and charge the system with liquid refrigerant, (refer to the gauge and the pressure of the low side).

6).When the electronic scale displays the proper weight (refer to the gauge and the pressure of the low

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