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Summary of Contents for ACPro AUHD18ND3F1O
- Page 1 AC Pro H-Series 18-48K Manual Models AUHD18ND3F1O AFH18D3F3I AUHD24ND3F1O AFH24D3F3I AUHD30ND3F1O AFH30D3F3I AUHD36ND3F1O AFH36D3F3I AUHD42ND3F1O AFH42D3F3I AUHD48ND3F1O AFH48D3F3I (Refrigerant R410A)
- Page 2 We reserve the right to correct any clerical errors. Copyright 2018 AC pro.
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Page 3: Installation Site
Installation 1. Indoor Unit Installation 1.1 Installation of Duct Type 1.1.1 Before Installation After receiving the machine, please check for any transport damage. If finding any surface or internal damage, please immediately report to the transport company or equipment company in writing. After receiving the machine, please check the unit and accessories in reference to the packing list. - Page 4 Air-conditioning Unit Ceiling-mount Screw Hanger Figure 3-1-1 Figure 3-1-2 Screw Hook Figure 3-1-3 Install the hanger onto the indoor unit as Figure 3-1-2 and Figure 3-1-3 shows. Install the indoor unit at the ceiling as Figure 3-1-4 shows. Screw Hanger Air Supply Air Intake I Detail...
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Page 5: Dimension Data
Level Instrument Condensate Air Intake Air Supply Drainpipes As the inside of the unit is in the negative Enlarged View pressure status, it is required to set up a Condensate Drainpipe backwater elbow. The requirements is: P is the absolute pressure inside the unit. The unit of the pressure is psig. - Page 6 • For the units: 36~48K Unit: mm (inches) Model 1280 1100 1160 1000 AFH18D3F3I (50- (43-3/8) (20-3/8) (32-1/4) (45-5/8) (22) (39-1/2) (6-1/4) (9-1/4) (10-1/2) 3/8) AFH24D3F3I 1010 1115 1225 (39-3/4) (29-1/2) (32-1/4) (43-7/8) (48-1/4) (30-1/2) (38-5/8) (6-1/4) (11-3/8) AFH30D3F3I AFH36D3F3I 1175 1150 1340...
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Page 7: Installation Clearance Data
Table 3-1-2 Installation Accessories List for Duct-type Indoor Unit Name & Shape Notes Installation and Operating Instructions Insulation materials for gas pipe Used for gas pipe connector on indoor unit Insulation materials for liquid pipe Used for liquid pipe connector on indoor unit Insulation materials for drainage pipe Used for wrapping the condensate pipe and rubber plug Nut M8 with gasket... -
Page 8: Drain Piping Work
1.1.6 Drain Piping Work Installation of Drainage Pipeline: CAUTION Install the drain hose in accordance with the instructions in this installation manual and keep the a rea warm enough to prevent condensation. Problems with the piping may lead to water leaks. (1) (Install the drain hose with downward gradient (1/50 to 1/100) and no risers or traps are used for the hose (Figure 3-1-8). - Page 9 Condensate Drainpipe As the inside of the unit is in the negative pressure status, it is required to set up a backwater elbow. The Enlarged View requirements is: Condensate Drainpipe P is the absolute pressure inside the unit. The unit of the pressure is psig. Figure 3-1-11 (5) Use a suitable drain hose, and see Table 3-3-3 for its size.
- Page 10 (11) There is adhesive on one side of the insulation so that after removing the protective paper over it the insulation can be directly attached to the drain hose. (12) Considerations for the unit with the condensate pump: For the unit with the condensate pump, only one drain port at the side close to the electric box is prepared and only through it the drain hose can be connected.
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Page 11: Installation Of Air Duct
T-joint converging drain pipes T-joint converging drain pipes Figure 3-1-17 1.1.7 Installation of air duct Dimensions of the Supply Air Outlet/Return Air Inlet 21mm(7/8inch) Figure 3-1-18 Supply Air Outlet Figure 3-1-19 Return Air Inlet Table 3-1-3 Supply Air Outlet Return Air Inlet Model AFH18D3F3I 158(6-1/4) - Page 12 1. 8 1. Installation of the Supply Air D (1) Installation of the Rectangular Duct. Table 3-1-4 Installation of the rectangular duct Name Name Hanger Filter Main Air Air Intake Pipe Supply Pipe Air Supply Canvas Air Pipe Outlet Air Intake Figure 3-1-20 CAUTION 1.
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Page 13: Outdoor Installation
Supply air Supply air Return air Return air Install the return air duct(a) Install the return air duct(b) Figure 3-1-22 Table 3-1-4 Installation of the return air duct Name Name Return Air Inlet (with filter) Indoor unit Canvas Duct Supply Air Duct Return Air Duct Grille . - Page 14 Install the outdoor unit where the condensate water can be drained out freely during heating operation. Do not place animals and plants in the path of the warm air. Take the air conditioner weight into account and select a place where noise and vibration are small. Install the outdoor unit where is capable of withstanding the weight of the unit and generates as less noise and vibration as possible.
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Page 15: Refrigeration Piping Work
Unit: mm (inch) Model AUHD18ND3F1O (37-5/8) (15-5/8) (27-1/2) (22) (14-1/8) AUHD24ND3F1O (16-3/4) (31-1/8) (24) (15-1/2) (38-5/8) AUHD30ND3F1O 1107 1100 AUHD36ND3F1O (43-5/8) (17-3/8) (43-1/4) (24-7/8) (15-3/4) AUHD42ND3F1O 1349 (37-3/4) (16-1/4) (53-1/8) (22-1/2) (14-3/4) AUHD48ND3F1O . Refrigeration Piping Work .1 Refrigeration Piping Work Procedures and Caution in Connecting .1.1 Flare Processing... - Page 16 Pipe Heat insulating pipe Cutter Cutt line Figure 3-2-5 CAUTION! 1. To prevent breaking of the pipe, avoid sharp bends. Bend the pipe with a radius of curvature of 150mm (5-7/8inch) or over. 2. If the pipe is bent repeatedly at the same place, it will break. .1.3 Connecting the Pipe at the Indoor Unit Side Detach the caps and plugs from the pipes.
- Page 17 Sponge Threaded fastener(×4) Heat insulation sheath (for the liquid tube) Heat insulation sheath (for the gas tube) Gas inlet pipe Liquid pipe Figure 3-2-6 Table 3-2-2 Flare nut tightening torque Pipe Diameter Tightening Torque 6mm (1/4inch) 15~30N·m (11~22ft.-1b.) 9.5mm (3/8inch) 35~40N·m (26~29ft.-1b.) 12.7mm (1/2inch) 45~50N·m (33~37ft.-1b.)
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Page 18: Vacuum And Gas Leakage Inspection
.1.5 Checking the Pipe Connections for Gas Leaking For both indoor and outdoor unit side, check the joints for gas leaking by the use of a gas leakage detector without fail when the pipes are connected. .1.6 Heat Insulation on the Pipe Joints (Indoor Side Only) Stick coupler heat insulation (large and small) to the place where connecting pipes. -
Page 19: Additional Charge
Pressure gauge (Low-pressure) gauge manifold Pressure gauge (Hi-pressure) Switch (Low-pressure) Switch (Hi-pressure) Connection pipe Connection pipe (to indoor unit) Liquid valve Gas valve Service pipe Hose Service port Hose with the valve pin Vacuum pump Figure 3-3-7 Note: For the large-sized unit, it has the service port for both the gas valve and the liquid valve. During evacuation, it is available to connect two hoses of the manifold valve assembly to two service ports to quicken the evacuating speed. -
Page 20: Specification Of Connection Pipe
Inch Max. Pipe (Outer between Indoor MODEL Length Diameter × wall Unit and m (feet) thickness) Outdoor Unit Liquid mm (inch) m (feet) AFH18D3F3I AUHD18ND3F1O 50(164) 15(49) 30×1.5 AFH24D3F3I AUHD24ND3F1O 50(164) 15(49) 20×1.2 AFH30D3F3I AUHD30ND3F1O 50(164) 15(49) 20×1.2 AFH36D3F3I AUHD36ND3F1O... -
Page 21: Electrical Wiring
ectrical Wiring For solid core wiring (Figure 3-4-1) Cut the wire end with a wire cutter or wire-cutting pliers, then strip the insulation about 25mm (1 inch). Using a screwdriver, remove the terminal screw(s) on the terminal board. Using pliers, bend the solid wire to form a loop suitable for the terminal screw. Shape the loop wire properly, place it on the terminal board and tighten securely with the terminal screw using a screwdriver. - Page 22 WARNING! Before starting work, check that power is not being supplied to the indoor unit and outdoor unit. Match the terminal block numbers and connection cord colors with those of the indoor unit side. Erroneous wiring may cause burning of the electric parts. .
- Page 23 CAUTION! The power cord and the wire of the fresh air valve are high-voltage, while the communication cord and connection wire of the wired controller are low-voltage. They should run separately against electromagnetic interference. The high-voltage and low-voltage lines should pass through the rubber rings at different electric box covers. Do not bundle the connection wire of the wired controller and the communication cord together, or arrange them in parallel, otherwise improper operation would occur.
- Page 24 Single Phase: Seperate Power Supply for indoor unit and outdoor unit. Single Phase: The power supply for indoor units from outdoor unit Power lines should go along the right sideplate. Communication lines between indoor and outdoor units also should go along the right side plate and keep away from power lines.
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Page 25: Main Control Malfunction
Maintanence . Trouble Table .1 Main Control Malfunction Table 1 Fault Display on Indoor Wired Controller Error Origin of Malfunction Name Control Description Code malfunction signal When outdoor unit detects the high pressure switch is cut off for 3s successively, high pressure protection will occur. All the loads (except the 4-way valve in heating mode) will be High pressure High pressure switch... - Page 26 Error Origin of Malfunction Name Control Description Code malfunction signal If cut-off of water level switch is detected for 8s successively Full water once energized, the system will enter full water protection. In Water level switch protection this case, switch off the unit and then switch it on to eliminate this malfunction.
- Page 27 Error Origin of Malfunction Name Control Description Code malfunction signal If outdoor unit detects that the tube temperature is higher than protective temp. value, the unit will report overload pro- Evaporator tection. The unit will not restart operation until tube tempera- temperature, ture is lower than the protective temp.
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Page 28: Description Of Drive Malfunction
.2 Description of Drive Malfunction Main board dual 8 numeral tube Display Codes for Outdoor Unit of 18k~48k Outdoor unit display of dual 8 numeral Malfunction Indoor Unit Display tube DC busbar over-voltage protection IPM or PFC over-temperature protection Current sense circuit error IPM or PFC temperature sensor error Compressor current protection DC busbar under-voltage protection... -
Page 29: Flow Chart Of Troubleshooting
. Flow Chart of Troubleshooting .1 Troubleshooting Flow Chart of Main Control Malfunction • E1 High Pressure Protection... - Page 30 • E2 Freeze Protection Freeze protection is normal protection but not abnormal malfunction. If freeze protection occurs fre- quently during operation, please check if the indoor filter is with filth blockage or if the indoor air outlet is abnor- mal. The user is required to clean the filter, check the air outlet and air return pipe periodically to ensure smooth air return and air outlet.
- Page 31 • E4 Discharge Protection Communication Malfunction Communication malfunction Check if the Reconnect the communication wire between communication indoor unit and outdoor unit is wire connected well Check if there is Replace the open circuit in the communication communication wire between indoor unit and wire outdoor unit Check if the...
- Page 32 • E9 Full Water Protection E9 protection Short circuit the full water If the unit is protection interface on indoor installed with mainboard according to the circuit water pump diagram Check if the water pump Replace the water pump works normally Replace the full water switch or make sure the float of full water switch works normally...
- Page 33 • F1 Malfunction of Evaporator Temperature Sensor Malfunction of evaporator temperature sensor Check if the evaporator Correctly insert the temperature sensor on temperature mainboard is inserted on the sensor on the needle stand correctly needle stand Disconnect Replace the the temperature sensor and temperature measure if its resistance is sensor...
- Page 34 • F3 Malfunction of Outdoor Ambient Temperature Sensor Malfunction of outdoor ambient temperature sensor Check Correctly insert the if the outdoor ambient temperature sensor on temperature sensor on mainboard the needle stand is inserted on the needle stand correctly Disconnect Replace the the temperature sensor and temperature sensor...
- Page 35 • F5 Malfunction of Wired Controller Temperature Sensor Malfunction of wired controller temperature sensor Replace the wired controller • H6 Malfunction of Outdoor Fan Motor...
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Page 36: Troubleshooting Flow Chart Of Drive Malfunction
• E8 Malfunction of Indoor Fan Motor Malfunction of indoor fan motor Check if the Correctly connect the control wire of indoor fan motor is control wire of fan motor connected on the outdoor on the mainboard mainboard correctly Replace the indoor fan motor and then Operate the unit with restart the unit to see if there still... - Page 37 • P8 IPM or PFC over-temperature protection P8 is displayed on the wired controller P8 is displayed in the mainboard 88 Indicating lamp Is the IPM or PFC module of mainboard tightened Replace the Tighten the IPM mainboard or PFC module Work normally •...
- Page 38 • P6 Drive-to-main-control communication error • Lc Compressor Startup Failure Lc is displayed on the wired controller Lc is displayed in the mainboard 88 indicating lamp Replace the mainboard. Does it work normally? Replace the compressor Work normally • P5 Compressor current protection •...
- Page 39 • PU Charging circuit error PU is displayed on the wired controller PU is displayed in the mainboard 88 indicating lamp Is the PFC wire tightened or is the sequence right? Tighten the PFC Replace the wire or adjust the mainboard sequence Work normally...
- Page 40 • H6 DC fan error...
- Page 41 .3 Interface AUHD18ND3F1O / AUHD24ND3F1O / AUHD30ND3F1O / AUHD36ND3F1O / AUHD42ND3F1O / AUHD- 48ND3F1O Main Control Board Silk-Screen Interface Interface Instruction AC-L Live wire input Live wire input AC-N Neutral wire input Neutral wire input Power supply interface to the drive...
- Page 42 Silk-Screen Interface Interface Instruction Communication needle stand of main control drive 1-pin: +3.3V Communication line [1-3.3V,2-TX,3- COMM1 2-pin: TXD RX,4-GND] 3-pin: RXD 4-pin: GND Communication needle stand with indoor unit Communication line with1-pin GND, 1-pin: GND 2-pin B and 3-pinA) 2-pin: B 3-pin: A Communication interface (reserved):...
- Page 43 Silk-Screen Interface Silk-Screen Interface L2_2 PFC induction wire (blue) L1_1 PFC induction wire (brown) Neutral wire input (white) AC-L Live wire input (red) COMM/COMM1 Communication interface JTAG1 (Reserved) Bus electric discharging Control power input DC-BUS1 interface (for testing) L2-1 PFC induction wire (yellow) L1-2 PFC induction wire (white) P-OUT...
- Page 44 AUHD36ND3F1O / AUHD42ND3F1O / AUHD48ND3F1O / 1) Drive Board: Silk-Screen Interface Silk-Screen Interface AC-L Live wire input (red) L1-1 PFC induction wire (brown) Neutral wire input (white) L2-2 PFC induction wire (blue) L2-1 PFC induction wire (yellow) L1-2 PFC induction wire (white) Control power input JTAG1 (Reserved)
- Page 45 (2) Filtering Board: Silk-Screen Interface Silk-Screen Interface N-OUT Neutral wire output (white) L-OUT Live wire output (red) DC bus interface (connect to DC-BUS AC-L Live wire input (red) drive board) Neutral wire input (white) (Reserved) Grounding wire (screw hole)
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Page 46: Ipm, Pfc Testing Method
If the measured voltages between L1-2P ,L2-1 P, N L1-2 , NL2-1 are all among 0.3V-0.7V, then it indicates the PFC module is normal; If any measured valve is 0, it indicates the PFC is damaged. • AUHD18ND3F1O / AUHD24ND3F1O / AUHD30ND3F1O... -
Page 47: Wiring Diagram
• AUHD36ND3F1O / AUHD42ND3F1O / AUHD48ND3F1O / . Wiring Diagram .1 Outdoor Unit The actual wiring should always refer to the wiring diagram of the unit. • Model: AUHD36ND3F1O... -
Page 48: Indoor Unit
Model: AUHD42ND3F1O .2 Indoor Unit The actual wiring should always refer to the wiring diagram of the unit. .2.1 Duct Type AFH18D3F3I, AFH24D3F3I, AFH30D3F3I, AFH36D3F3I, AFH42D3F3I, AFH48D3F3I,... -
Page 49: Disassembly And Assembly Procedure Of Main Parts
. Disassembly and Assembly Procedure of Main Parts .1 Outdoor Unit Disassembly and Assembly of external casing Remark: Step Illustration Handling Instruction 1. Remove the top cover and handle; 1. Remove external casing 2. Remove the grille, outer case and right side plate. - Page 50 24/30K Disassembly and Assembly of external casing Remark: Step Illustration Handling Instruction 1. Remove the top cover and handle; 1. Remove external 2. Remove the grille, outer case, front side plate casing and right side plate. 1. Remove the blade nut and then remove the 2.
- Page 51 Disassembly and Assembly of external casing Remark: Step Illustration Handling Instruction 1. Remove the top cover and handle; 1. Remove external 2. Remove the grille, outer case and right side casing plate. 1. Remove the blade nut and then remove the 2.
- Page 52 42K/48K Disassembly and Assembly of external casing Remark: Step Illustration Handling Instruction 1. Remove the top cover and handle; 1. Remove external 2. Remove the grille, outer case and right side casing plate. 1. Remove the blade nut and then remove the 2.
- Page 53 .2 Indoor Unit .2.1 Duct Type Removal and Assembly of Fan Motor Remarks: Before removing the fan, make sure to cut off the power firstly. Step Illustration Handling Instruction Cut off the power supply of indoor unit. Use 1. Unplug the motor screwdriver to remove the electric box cover cables and unplug the motor cables in electric box.
- Page 54 Removal and Assembly of Fan Motor Remarks: Before removing the fan, make sure to cut off the power firstly. Step Illustration Handling Instruction Firstly, disengage the motor from motor support. Then, sequentially disengage the fan sub-assem- bly form the motor shaft. Remove the motor from 6.
- Page 55 Disassembly of electrical parts box cover panel and electrical parts box Remark: Make sure that the power supply is cut off before disassembling and protect all the parts during disassembly, especially the electrical components. Do not dampen or hit them. Step Illustration Handling Instruction...
- Page 56 Disassembly of fan and motor Remark: Make sure that the power supply is cut off before disassembling and protect all the parts during disassembly. Step Illustration Handling Instruction Disassemble the fixing screws on the fan compo- nents. (As is shown in graph, circle represents 6 screws.) Disassembly of fan motor Disassemble the fastening screws on the fan and...
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Page 57: Exploded Views And Spare Part List
. Exploded Views and Spare Part List .1 Outdoor Unit AUHD18ND3F1O Exploded View and Spare Parts List:... - Page 58 AUHD18ND3F1O Name of Part AC Pro # 63700 Part Code Quantity Front Grill 01473049 Front Panel 01535013P Axial Flow Fan 10335008 Chassis Sub-assy 01195200028P Electrical Heater 7651300403 Drainage hole Cap 06813401 Drainage Connecter 06123401 Compressor Overload Protector(External) 00180030/00183051/00183032/00183031 Compressor Gasket...
- Page 59 Model: AUHD24ND3F1O Exploded Views and spare parts list:...
- Page 60 AUHD24ND3F1O Name of Part AC Pro # 63698 Part Code Quantity Front Grill 01473050 Cabinet 01435004P Left Handle 26235401 Front Side Plate 01305086P Axial Flow Fan 10335014 Fan Motor 15702802 Electrical Heater(Compressor) 7651873209 Chassis Sub-assy 0119520001301P Drainage hole Cap 06813401 Drainage Connecter 06123401 Compressor Overload Protector(External)
- Page 61 Model: AUHD30ND3F1O Exploded Views and Spare Parts List:...
- Page 62 AUHD30ND3F1O Name of Part AC Pro # 63697 Part Code Quantity Front Grill 01473050 Cabinet 01435004P Left Handle 26235401 Front Side Plate 01305086P Axial Flow Fan 10335014 Chassis Sub-assy 01195200013P Drainage hole Cap 06813401 Electrical Heater(Compressor) 7651873209 Drainage Connecter 06123401 Compressor Overload Protector(External) 00180030/00183051/00183032/00183031 Compressor Gasket...
- Page 63 Model: AUHD36ND3F1O Exploded Views and Spare Parts List:...
- Page 64 AUHD36ND3F1O Name of Part AC Pro # 63696 Part Code Quantity Front Grill 01574106 Cabinet 01435007P Handle 26235253 Front Side Plate Sub-Assy 01305508 Axial Flow Fan 10335010 Chassis Sub-assy 01195244P Electrical Heater(Compressor) 7651873209 Drainage Joint 26113009 Compressor Overload Protector(External) 00180030/00183051 / 00183032/00183031 Gas-liquid Separator Sub-Assy 07255201 Compressor Gasket...
- Page 65 Model: AUHD42ND3F1O / AUHD48ND3F1O Exploded Views and Spare Parts List:...
- Page 66 AUHD42ND3F1O/ AUHD48ND3F1O Name of Part AC Pro # 63704/63699 Part Code Quantity Front Grill 1574100009 Diversion Circle 10474100001 Cabinet Assy 1514100006 Handle 26235253 Front Side Plate 01314100021P Axial Flow Fan 10434100003 Chassis Sub-assy 01195200020P electrical heater 765152123 Drainage hole Cap 06813401 Drainage Connecter 06123401...
- Page 67 .2 Indoor Unit Model: AFH18D3F3I (with water pump) Exploded view and spare parts list.
- Page 68 AFH18D3F3I Name of Part AC Pro # 63692 Part Code Quantity Filter Sub-assy 11125303 Choke Plug of Drain Pipe 76712455 Lower Cover Plate Sub-Assy 01265304 Water Tray Assy 01285317 Evaporator Assy 01025200050 Water Level Switch 450127011 Water Pump 43138220 Pump Drainpipe 05235301 Terminal Board 42010194...
- Page 69 Model: AFH24D3F3I / AFH30D3F3I Exploded view and spare parts list.
- Page 70 AFH24D3F3I / AFH30D3F3I Name of Part AC Pro # 63693 / 63694 Part Code Quantity Filter Sub-assy 111253031 Choke Plug of Drain Pipe 76712455 Water Tray Assy 01285323 Liquid Level Switch 4501801203 Pump Darinpipe 05235301 Water Pump 43138220 Lower Cover Plate Sub-Assy 15265301 Strainer 07415210...
- Page 71 Model: AFH36D3F3I Exploded view and spare parts list.
- Page 72 AFH36D3F3I Name of Part AC Pro # 63690 Part Code Quantity Display Board 30294000007 Ambient Temperature Sensor 3900012123 Tube Sensor 3900012128 Hook 02205209 Left Side Plate Sub-Assy 013152500064 Propeller Housing (Upper) 26905200010 Centrifugal Fan 10425200002 Front Side Plate Sub-Assy 01315200091 Blower Mounting Plate Sub-Assy 01325200057 Brushless DC Motor...
- Page 73 Model: AFH42D3F3I / AFH48D3F3I Exploded view and spare parts list.
- Page 74 AFH42D3F3I / AFH48D3F3I Name of Part AC Pro # 63691 / 63695 Part Code Quantity Main Board 30224000039 Main Board 30221000011 Terminal Board 4201025301 Terminal Board 42010194 Electric Box Assy 01395200471 Right Side Plate Sub-Assy 01315200078 Water Pump Assy 15405200081 Water Pump 4313822001 Pump Drainpipe...
- Page 75 Refrigeration Piping Work 1 .1 Refrigeration Piping Work Procedures and Caution in Connecting Flare Processing Cut the connection pipe with the pipe cutter and remove the burrs. Hold the pipe downward to prevent cuttings from entering the pipe. Remove the flare nuts at the stop valve of the outdoor unit and inside the accessory bag of the indoor unit, then insert them to the connection pipe, after that, flare the connection pipe with a flaring tool.
- Page 76 Pipe Heat insulating pipe Cutter Cutt line Figure 3-2-5 CAUTION! 1. To prevent breaking of the pipe, avoid sharp bends. Bend the pipe with a radius of curvature of 150mm (5-7/8inch) or over. 2. If the pipe is bent repeatedly at the same place, it will break. 1 .1.3 Connecting the Pipe at the Indoor Unit Side Detach the caps and plugs from the pipes.
- Page 77 Sponge Threaded fastener(×4) Heat insulation sheath (for the liquid tube) Heat insulation sheath (for the gas tube) Gas inlet pipe Liquid pipe Figure 3-2-6 Table 3-2-2 Flare nut tightening torque Pipe Diameter Tightening Torque 6mm (1/4inch) 15~30N·m (11~22ft.-1b.) 9.5mm (3/8inch) 35~40N·m (26~29ft.-1b.) 12.7mm (1/2inch) 45~50N·m (33~37ft.-1b.)
- Page 78 1 .1.5 Checking the Pipe Connections for Gas Leaking For both indoor and outdoor unit side, check the joints for gas leaking by the use of a gas leakage detector without fail when the pipes are connected. 1 .1.6 Heat Insulation on the Pipe Joints (Indoor Side Only) Stick coupler heat insulation (large and small) to the place where connecting pipes.
- Page 79 Pressure gauge (Low-pressure) gauge manifold Pressure gauge (Hi-pressure) Switch (Low-pressure) Switch (Hi-pressure) Connection pipe Connection pipe (to indoor unit) Liquid valve Gas valve Service pipe Hose Service port Hose with the valve pin Vacuum pump Figure 3-3-7 Note: For the large-sized unit, it has the service port for both the gas valve and the liquid valve. During evacuation, it is available to connect two hoses of the manifold valve assembly to two service ports to quicken the evacuating speed.
- Page 80 Inch Max. Pipe (Outer between Indoor MODEL Length Diameter × wall Unit and m (feet) thickness) Outdoor Unit Liquid mm (inch) m (feet) AFH18D3F3I AUHD18ND3F1O 50(164) 15(49) 30×1.5 AFH24D3F3I AUHD24ND3F1O 50(164) 15(49) 20×1.2 AFH30D3F3I AUHD30ND3F1O 50(164) 15(49) 20×1.2 AFH36D3F3I AUHD36ND3F1O...
- Page 81 1 .2 ectrical Wiring For solid core wiring (Figure 3-4-1) Cut the wire end with a wire cutter or wire-cutting pliers, then strip the insulation about 25mm (1 inch). Using a screwdriver, remove the terminal screw(s) on the terminal board. Using pliers, bend the solid wire to form a loop suitable for the terminal screw.
- Page 82 WARNING! Before starting work, check that power is not being supplied to the indoor unit and outdoor unit. Match the terminal block numbers and connection cord colors with those of the indoor unit side. Erroneous wiring may cause burning of the electric parts. .
- Page 83 CAUTION! The power cord and the wire of the fresh air valve are high-voltage, while the communication cord and connection wire of the wired controller are low-voltage. They should run separately against electromagnetic interference. The high-voltage and low-voltage lines should pass through the rubber rings at different electric box covers. Do not bundle the connection wire of the wired controller and the communication cord together, or arrange them in parallel, otherwise improper operation would occur.
- Page 84 Single Phase: Seperate Power Supply for indoor unit and outdoor unit. Single Phase: The power supply for indoor units from outdoor unit Power lines should go along the right sideplate. Communication lines between indoor and outdoor units also should go along the right side plate and keep away from power lines.
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