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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
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Service Manual VMH Serie S Heat Controller, Inc. CONTENTS 1.General Information of Outdoor Units ........................................................... 3 2. Features...........................................................................................................4 3. Dimensions .....................................................................................................5 4. Wiring Diagram ......................................................................................
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Heat Controller, Inc. VMH Serie S 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 3 2
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Service Manual VMH Serie S 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 v
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Heat Controller, Inc. VMH Serie S 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) 5 4
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Service Manual VMH Serie S Heat Controller, Inc. 4. Wiring Diagram 4.1 A-VMH18DC-1 4.2 A-VMH27TC-1 6 5
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Heat Controller, Inc. VMH Serie S Service Manual 4.3 A-VMH36QC-1 7 6
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Service Manual VMH Serie S Heat Controller, Inc. 5. Refrigeration Cycle Diagram 8.1 Refrigeration circuit drawing of inverter dual zone: A-VMH18DC-1 INDOOR OUTDOOR EXV A CAPILIARY A LIQUID VALVE A CHECK VALVE EXV B CAPILIARY B LIQUID VALVE B T3 Condenser temp. sensor CAPILIARY TUBE HEAT HEAT EXCHANGE T4 Ambient T1 Room EXCHANGE (EVAPORATOR) temp. sensor temp. sensor (CONDENSER) T2 Evaporator GAS VALVE A temp. sensor 4-WAY VALVE GAS VALVE B Accumulator T5 Discharge temp. sensor COOLING Comp
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Heat Controller, Inc. VMH Serie S Service Manual 8.3 Refrigeration circuit drawing of inverter Quad-zone: A-VMH36QC-1 INDOOR OUTDOOR EXV A CAPILIARY A LIQUID VALVE A EXV B CAPILIARY B LIQUID VALVE B CHECK VALVE EXV C CAPILIARY C LIQUID VALVE C T3 Condenser EXV D CAPILIARY D temp. sensor CAPILIARY TUBE LIQUID VALVE D HEAT HEAT EXCHANGE T4 Ambient T1 Room EXCHANGE (EVAPORATOR) temp. sensor temp. sensor (CONDENSER) GAS VALVE A T2 Evaporator temp. sensor GAS VALVE B 4-WAY VALVE Accumulator G
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Service Manual VMH Serie S 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 Combinations Comb. Unit A Unit B 9k — Dual(1x1) 12k — 18k — 9k 9k Dual (1x2) 9k 12k 6.2 Indoor unit combinations A-VMH27TC-1 Combinations C
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Heat Controller, Inc. VMH Serie S 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. Mai
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Service Manual VMH Serie S Heat Controller, Inc. 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 m
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Heat Controller, Inc. VMH Serie S Service Manual 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
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Service Manual VMH Serie S Heat Controller, Inc. 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
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Heat Controller, Inc. VMH Serie S Service Manual 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 refri
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Service Manual VMH Serie S Heat Controller, Inc. side), 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. 7.6 Replacing the indoor unit 1. Collecting the refrigerant into the outdoor unit Proc
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Heat Controller, Inc. VMH Serie S Service Manual Do this quickly so that the gauge ends up indicating 0.3 to 0.5Mpa. Disconnect the charge set, and tighten the 2-way and 3-way valve’s stem nuts. Use a torque wrench to tighten the 3-way valves service port cap to a torque of 1.8 N.m. Be sure to check for gas leakage using soap water. 7). Remove the defective indoor unit and install the new indoor unit. Follow the next set of procedures to charge. 2. Air purging by the refrigerant Proc
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Service Manual VMH Serie S Heat Controller, Inc. 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. 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 18N.m. Be sure to check the gas l
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Heat Controller, Inc. VMH Serie S Service Manual 2. Refrigerant charging 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 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 th
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Service Manual VMH Serie S Heat Controller, Inc. 8. Electronic control function 8.1 Abbreviations T1: Indoor ambient temperature T2: Coil temperature of indoor heat exchanger middle. T2B: Coil temperature of indoor heat exchanger outlet. T3: Coil temperature of outdoor heat exchanger T4: Outdoor ambient temperature T5: Compressor discharge temperature Ts: Set point temperature. 8.2 Electric control working environment. 8.2.1 Input voltage: 230V. 8.2.2 Input power frequency:6
