HEAT CONTROLLER, INC. Wall Mounted Multi-Split System Air Conditioning/Heat Pump DMH18DB-1 Before servicing the unit, read the “safety precautions” in this manual. Only for authorized service personnel.
Multi type Air Conditioner Service Manual TABLE OF CONTENTS Combination table.......................................................................................................................................3 Safety Precautions......................................................................................................................................4 Dimensions.....................................................................................................................................
Combination table Combination table Cooling Operation Heating Combination of Indoor Unit(kBtu/h) Each Capacity Unit-A 1 Unit 9 2 Unit 9 Unit-B 9 Total UNIT-A(Btu/h) UNIT-B(Btu/h) Total Capacity Btu/h kW Each Capacity Total Capacity UNIT-A(Btu/h) UNIT-B(Btu/h) Btu/h kW 9 9000 - 9000 2.63 9000 - 9000 2.63 18 9000 9000 18000 5.27 9000 9000 18000 5.27 Notes : 1.Cooling Capacity is based on : indoor temp. 26.7°C(80.1°F)DB, 19.4°C(66.9°F)WB; outdoor temp. 35°C(95°F)DB, 23.
Safety Precautions Safety Precautions To prevent injury to the user or other people and property damage, the following instructions must be followed. ■ Incorrect operation due to ignoring instruction will cause harm or damage. The seriousness is classified by the following indications. WARNING This symbol indicates the possibility of death or serious injury. CAUTION This symbol indicates the possibility of injury or damage to properties only.
Safety Precautions Do not install, remove, or reinstall the unit by yourself (customer). • There is risk of fire, electric shock, explosion, or injury. Do not install the product on a defective installation stand. • It may cause injury, accident, or damage to the product. Do not allow water to run into electric parts. • It may cause There is risk of fire, failure of the product, or electric shock. Be cautious when unpacking and installing the product. • Sharp edges could cause injury.
Safety Precautions When flammable gas leaks, turn off the gas and open a window for ventilation before turn the product on. • Do not use the telephone or turn switches on or off. There is risk of explosion or fire Do not open the inlet grill of the product during operation. (Do not touch the electrostatic filter, if the unit is so equipped.) • There is risk of physical injury, electric shock, or product failure. If strange sounds, or smoke comes from product. Turn the breaker off.
Safety Precautions When the product is not to be used for a long time, disconnect the power by turning off the breaker. Take care to ensure that nobody could step on or fall onto the outdoor unit. • There is risk of product damage or failure, or unintend- • This could result in personal injury and product damed operation. age. CAUTION ■ Installation Always check for gas (refrigerant) leakage after installation or repair of product. • Low refrigerant levels may cause failure of product.
Safety Precautions ■ Operational Do not expose the skin directly to cool air for long periods of time. (Don't sit in the draft.) • This could harm to your health. Use a soft cloth to clean. Do not use harsh detergents, solvents, etc. • There is risk of fire, electric shock, or damage to the plastic parts of the product. Do not use the product for special purposes, such as preserving foods, works of art, etc. It is a consumer air conditioner, not a precision refrigeration system.
Safety Precautions Use a firm stool or ladder when cleaning or maintaining the product. • Be careful and avoid personal injury. Do not recharge or disassemble the batteries. Do not dispose of batteries in a fire. • They may burn or explode. Replace the all batteries in the remote control with new ones of the same type. Do not mix old and new batteries or different types of batteries.
Dimensions Dimensions Indoor Unit Split Type Indoor H D W Installation plate Model Split Type(S4) 9 kBtu/h Dimension W mm(in) 870(34.2) H mm(in) 270(10.
Dimensions Outdoor Unit L4 L1 H L3 L2 D W L6 L5 MODEL DIM L7 UE 18kBtu/h W mm(in) 870(34.3) H mm(in) 655(25.8) D mm(in) 320(12.6) L1 mm(in) 370(14.6) L2 mm(in) 25(1.0) L3 mm(in) 775(30.5) L4 mm(in) 25(1.0) L5 mm(in) 546(21.5) L6 mm(in) 160(6.3) L7 mm(in) 160(6.
Product Specifications Product Specifications Outdoor Unit Nominal Capacity (Min~Rating~Max) Cooling Heating Nominal Input Cooling (Min~Rating~Max) Heating Testing Combination Running Current(Rating) Cooling Heating Starting Current Cooling/Heating Power Supply Power Supply Cable(Outdoor) Power and Transmission Cable (Outdoor to Indoor or Outdoor to BD) Power and Transmission Cable(BD to Indoor) Dimensions WxHxD Net Weight Max.
Product Specifications Indoor Unit Power Supply Cooling Capacity Heating Capacity Current Fan Nominal Running Current Motor Type Fan Type Motor Output(W) x No.
Installation Installation Read carefully, and then follow step by step.
Installation Select the best location Indoor unit 1. Do not have any heat or steam near the unit. 2. Select a place where there are no obstacles in front of the unit. More than 30cm (11.8 inch) More than 20cm (7.9 inch) 3. Make sure that condensation drainage can be conveniently routed away. 4. Do not install near a doorway. 5. Ensure the spaces indicated by arrows from the wall, ceiling, fence or other obstacles. More than 30cm (11.8 inch) 6.
Installation Piping length and elevation Multi Piping Type Capacity(Btu/h) 18k Max Elevation Max total length of Max length of each Min length of each between each all pipes (A+B) pipe (A/B) pipe (A/B) indoor unit and outdoor unit (h1) 30m(100ft) 15m(50ft) 5m(16ft) 7.5m(25ft) Max elevation between indoor units (h2) 7.5m(25ft) Pipe Size Indoor Capacity (Btu/h) Gas Liquid 9k 9.52mm(3/8") 6.35mm(1/4") Standard Length 7.5m(25ft) Additional Refrigerant 20g/m(0.
Installation Fixing Installation Plate The wall you select should be strong and solid enough to prevent vibration 1. Mount the installation plate on the wall with type "A" screws. If mounting the unit on a concrete wall, use anchor bolts. • Mount the installation plate horizontally by aligning the centerline using a level. Installation Plate Chassis Hook Type "A" screw 2. Measure the wall and mark the centerline. It is also important to use caution concerning the location of the installation plate.
Flaring Work and Connection of Piping Flaring Work and Connection of Piping Flaring work Main cause for gas leakage is due to defect in flaring work. Carry out correct flaring work in the following procedure. Cut the pipes and the cable. 1. Use the piping kit accessory or the pipes purchased locally. 2. Measure the distance between the indoor and the outdoor unit. Copper pipe Slanted Uneven Rough 90° 3. Cut the pipes a little longer than measured distance. 4. Cut the cable 1.5m (5.
Flaring Work and Connection of Piping Check 1. Compare the flared work with the figure. Smooth all round Inside is shiny without scratches 2. If a flared section is defective, cut it off and do flaring work again. = Improper flaring = Even length all round Inclined Surface Cracked Uneven damaged thickness Connecting the Piping Indoor 1. Prepare the indoor unit's piping and drain hose for installation through the wall. 2.
Flaring Work and Connection of Piping 4. Indoor unit installation Hook the indoor unit onto the upper portion of the installation plate.(Engage the two hooks of the rear top of the indoor unit with the upper edge of the installation plate.) Ensure that the hooks are properly seated on the installation plate by moving it left and right. Connecting cable Drain hose Press the lower left and right sides of the unit against the installation plate until the hooks engage into their slots(clicking sound).
Flaring Work and Connection of Piping For left rear piping 1. Route the indoor tubing and the drain hose to the required piping hole position. 1 2 2. Insert the piping, drain hose, and the connecting cable into the piping hole. Connecting cable 3. Insert the connecting cable into the indoor unit. • Don't connect the cable to the indoor unit. • Make a small loop with the cable for easy connection later. Drain pipe 4. Tape the drain hose and the connecting cables. 5.
Flaring Work and Connection of Piping Wrap the insulation material around the connecting portion. 1. Overlap the connection pipe heat insulation and the indoor unit pipe heat insulation material. Bind them together with vinyl tape so that there may be no gap. 2. Wrap the area which accommodates the rear piping housing section with vinyl tape. Plastic bands Insulation material Indoor unit piping Connection pipe Vinyl tape (wide) Wrap with vinyl tape Pipe Vinyl tape(narrow) Connecting cable 3.
Flaring Work and Connection of Piping REMOTE CONTROL PREPARATION(OPTIONAL) HOW TO MOUNT ONTO A WALL HOW TO INSERT BATTERIES Remove the battery cover from the remote controller. • Slide the cover according to the arrow direction. Insert the two batteries. • Be sure that the (+) and (-) directions are correct. • Be sure that both batteries are new. Re-attach the cover. • Slide it back into position.
Flaring Work and Connection of Piping Outdoor Align the center of the pipings and sufficiently tighten the flare nut by hand. Finally, tighten the flare nut with torque wrench until the wrench clicks. Outdoor unit • When tightening the flare nut with torque wrench, ensure the direction for tightening follows the arrow on the wrench. Outside diameter mm inch Ø6.35 1/4 Ø9.52 3/8 Torque kgf.m(lbf-ft) 1.8~2.5(13) 3.4~4.
Flaring Work and Connection of Piping Connecting the Cable between Indoor Unit and Outdoor Unit Connect the cable to the Indoor unit. Connect the cable to the indoor unit by connecting the wires to the terminals on the control board individually according to the outdoor unit connection. (Ensure that the color of the wires of the outdoor unit and the terminal No. are the same as those of the indoor unit.) The earth wire should be longer than the common wires.
Connecting the Cable between Indoor Unit and Outdoor Unit Connect the cable to the Outdoor unit. 1. Remove the cover control from the unit by loosening the screw. Connect the wires to the terminals on the control board individually as the following. 2. Secure the cable into the control board with the strain relief clamp. 3. Refix the cover control to the original position with the screw.
Connecting the Cable between Indoor Unit and Outdoor Unit Connection method of the connecting cable(Example) (1) Remove two-caps on the conduit panel. (for low voltage line) (2) Pull out connection cable through conduit.
Connecting the Cable between Indoor Unit and Outdoor Unit CAUTION! Provide a circuit breaker between the power source and the outdoor unit as shown below. Size breaker per the Maximum Fuse or Circuit Breaker (MOC) rating on the unit rating plate. Main power source Air Conditioner Circuit Breaker Use a circuit breaker or time delay fuse. Model Power source Fuse or breaker Capacity 18k 1ø,230/208V 20A Connect the cable to the indoor unit 1.
Checking the Drainage, Forming the Pipings and Long Pipe Setting Checking the Drainage, Forming the Pipings and Long Pipe Setting Checking the drainage To check the drainage. 1. Pour a glass of water on the evaporator. 2. Ensure the water flows through the drain hose of the indoor unit without any leakage and goes out the drain exit. Drain piping 1. The drain hose should point downward for easy drain flow. Downward slope 2. Examples of incorrect drain piping.
Checking the Drainage, Forming the Pipings and Long Pipe Setting Forming the piping Form the piping by wrapping the connecting portion of the indoor unit with insulation material and secure it with two kinds of vinyl tape. Seal a small opening around the pipings with gum type sealer. Taping • If you want to connect an additional drain hose, the end of the drain outlet should be routed above the ground. Secure the drain hose appropriately.
Air Purging and Evacuation Air Purging and Evacuation Air and moisture remaining in the refrigerant system have undesirable effects as indicated below. 1. Pressure in the system rises. 2. Operating current rises. 3. Cooling(or heating) efficiency drops. 4. Moisture in the refrigerant circuit may freeze and block capillary tubing. 5. Water may lead to corrosion of parts in the refrigeration system.
Checking the Drainage, Forming the Pipings and Long Pipe Setting Evacuation 1. Connect the charge hose end described in the preceding steps to the vacuum pump to evacuate the tubing and indoor unit. Confirm the "Lo" knob of the manifold valve is open. Then, run the vacuum pump. The operation time for evacuation varies with tubing length and capacity of the pump. [Each Room] The vacuum pump must be operated less than 0.8torr of the gage pressure. Indoor unit Outdoor unit 2.
Charging Charging ■ Each outdoor unit is factory charged (nameplate charge) for the evaporator as well as a 7.5m(25ft) line set for each indoor line. Any time total line set is used either shorter or longer then the nominal 15m(50ft) line set length the refrigerant charge has to be adjusted. ■ Whether the line set is made shorter or longer you must adjust the charge based on how many ft of tubing are either added or removed based on 20g/m(0.22oz/ft) of R-410A per meter(foot).
Test Running Test Running 1. Check that all tubing and wiring have been properly connected. 2. Check that the gas and liquid side service valves are fully open. Prepare remote control Remove the battery cover by pulling it according to the arrow direction. Insert new batteries making sure that the (+) and (–) of battery are installed correctly. Reattach the cover by pushing it back into position. : • Use 2 AAA(1.5volt) batteries. Do not use rechargeable batteries.
Operation Operation Function of control 1. MAIN UNIT FUNCTION • DISPLAY Operation Indicator • On while in appliance operation, off while in appliance pause • Flashing while in disconnection or short in Thermistor (3 sec off / 0.
Operation 27°C(80.6°F), it operates with Super-Low(while in sleep mode, with the medium airflow speed). • While compressor off, the indoor fan is off when the indoor pipe temp is below 33°C(91.4°F), when above 35°C(95°F) , it operates with the low airflow speed. • While in defrost control, the indoor is outdoor fans are turned off. ■ Defrost Control(Heating) • Defrost operation is controlled by timer and sensing temperature of outdoor pipe.
Operation 2) Fuzzy Operation for Dehumidification • According to the setting temperature selected by Fuzzy rule, when the intake air temp is 0.5°C(0.9°F) or more below the setting temp, the compressor is turned off. When 0.5°C(0.9°F) or more above the setting temp, the compressor is turned on. Compressor ON Temp ➲ Setting Temp + 0.5°C(0.9°F) Compressor OFF Temp ➲ Setting Temp+0.5°C(0.
Operation • If the appliance is on pause at the time set by the timer, the pause continues. ■ Off-Timer <=> On-Timer Operation • When the set time is reached after the on/off time is input by the remote control, the on/off-timer operation is carried out according to the set time. ■ Sleep Timer Operation • When the sleep time is reached after <1,2,3,4,5,6,7,0(cancel) hr> is input by the remote control while in appliance operation, the operation of the appliance stops.
Operation ■ Forced Operation • To operate the appliance by force in case that the remote control is lost, the forced operation selection switch is on the main unit of the appliance to operate the appliance in the standard conditions.
Operation Function of Indoor Unit Split Type Indoor Unit Operation ON/OFF by Remote controller Sensing the Room Temperature • Room temperature sensor. (THERMISTOR) Room temperature control • Maintains the room temperature in accordance with the Setting Temp. Starting Current Control • Indoor fan is delayed for 5 seconds at the starting. Time Delay Safety Control • Restarting is delayed for approx. 3 minutes.
Operation Function of Outdoor Unit Outdoor Unit Operating Step • Compressor step varies considering condition such as room temp,outdoor temp, operating room number,Temp gap between room temp and set temp and so on. LEV Control • LEV pulse is modulated to keep constant superheat or subcooling. Out door Fan Control • Outdoor fan operates at High or Off to respond to the load condition. R/Valve Control(Heating Model Only) • Convert R/Valve to change cooling to heating, heating to cooling.
Operation Remote Control Operation The Remote Controller transmits the signals to the system. Signal transmitter 1 START/STOP BUTTON Operation starts when this button is pressed and stops when the button is pressed again. 2 OPERATION MODE SELECTION BUTTON Used to select the operation mode. 3 5 6 4 2 7 11 8 13 INDOOR FAN SPEED SELECTOR Used to select fan speed in four steps low, medium, high and CHAOS. 5 JET COOL Used to start or stop the speed cooling/heating.
Disassembly Disassembly Indoor Unit Split Type Indoor Unit Disconnect the unit from power supply before making any checks. Be sure the power switch is set to “OFF”. To remove the Grille from the Chassis. • Set the up-and-down air discharge louver to open position (horizontally) by finger pressure. • Remove the securing screws. • To remove the Grille, pull the lower left and right side of the grille toward you (slightly tilted) and lift it straight upward. 1.
Disassembly 2. To remove the Control Box. • Remove securing screws. • Pull the control box out from the chassis carefully. Screw 3. To remove the Discharge Grille. • Unhook the discharge grille and pull the discharge grille out from the chassis carefully. 4. To remove the Evaporator. • Remove 3 screws securing the evaporator(at the left 2EA in the Eva Holder, at the right 1EA). • When repair, do not damage the Caution label.
Disassembly • Unhook the tab on the right inside of the chassis at the same time, slightly pull the evaporator toward you until the tab is clear of the slot. 5. To remove the Motor Cover • Remove 2 securing screw. • Pull the motor cover out from the chassis carefully. Motor cover 6. To remove the Cross-Flow Fan • Loosen the screw securing the cross-flow fan to the fan motor (do not remove). • Lift up the right side of the cross-flow fan and the fan motor, separate the fan motor from the cross-flow fan.
Schematic Diagram Schematic Diagram Electronic Control Device 1.
CN-JIG OUT_TH OUT_PIPE CN-TH2 SUCTION DISCHARGE CN-TH1 4 3 2 1 1 2 3 4 1 2 3 4 4 3 2 1 1 2 3 4 1 2 3 4 56K R04T 10K R01T DC 5V 1K R03T 1K R02T C01H-C04H : 103 R05H-R20H (R05H,R06H,R07H:6.2K 1%) (ETC: 12.1K 1%) DC 5V JIG_RX JIG_TX DC 5V IC01A 2 7036P 1 3 C02A 10 50V R03A,100 R02A,4.7K + R01B,1M JIG_TX JIG_RX PWM(C) PWM(B) PWM(A) OSC01B CST-8.00MGW C01A 0.
PWM(C) 4.7K PWM(B) 4.7K PWM(A) C24M 100uf C13M 100uf C01M 100uf R02M 9.1k 1% R15M 9.1k 1% + R27M 9.1k 1% R26M 10.2K 1% Q07M KRA101M + R14M 10.2K 1% Q04M KRA101M + R01M 10.2K 1% 6 7 6 7 6 DC DC 21.5K 4.3K 21.5K 4.3K 5 4 2 3 2 C25M 102 100V 6.04K 1 2 3 2 C14M 102 100V 5V 5 4 6.04K 1 2 3 2 C02M 102 100V 5V 5 4 6.04K 1 21.5K 4.3K R03M 13K 1% 39.2K R16M 13K 1% 39.2K 1 51.1K 22 R28M 13K 1% 35.7K 20 1 51.1K 22 35.7K 20 1 51.1K 22 35.7K 20 39.
Schematic Diagram Wiring Diagram 1. Room Type Indoor Unit 2.
Schematic Diagram Components Locations 1. Indoor Unit MAIN P.C.
Schematic Diagram 2.
Schematic Diagram 3.
Schematic Diagram 2) Solder side Service Manual 53
Troubleshooting Guide Troubleshooting Guide Refrigeration Cycle Diagram Indoor Outdoor Ø 9.52 Th1 Th2 Th9 Th3 High Pressure S/W Ø 9.52 Th4 C/V2 Th5 C/V1 Th7 Th6 Ø 6.35 Th8 EEV EEV A c c B Comp A Comp Ø 6.35 Refrigerent Flow Cooling Heating LOC.
Troubleshooting Guide Self-diagnosis Function ■ Error Indicator • The function is to self-diagnoisis airconditioner and express the troubles identifically if there is any trouble. • Error mark is ON/OFF for the operation LED of evaporator body in the same manner as the following table. • If more than two troubles occur simultaneously, primarily the highest trouble fo error code is expressed. • After error occurrence, if error is released, error LED is also released simultaneously.
Troubleshooting Guide Cycle Troubleshooting Guide Trouble analysis 1. Check temperature difference between intake and discharge air, and operating current. Temp. difference Current : approx. 0°C(0°F) : less than 80% of rated current All amount of refrigerant leaked out. Check refrigeration cycle. Temp. difference Current : approx. 8°C(14.4°F) : less than 80% of rated current Refrigerant leakage Clog of refrigeration cycle Defective compressor Temp. difference Current : less than 8°C(14.
Troubleshooting Guide Electronic Parts Troubleshooting Guide ❇ Refer to electronic contorol device drawing & schematic diagram. Trouble 1 The Product doesn’t operate at all. Turn off the main power and wait until LED on outdoor PCB is off. Turn on the main power again. Does "Beeping" sound is made from the indoor unit? NO YES Check the voltage of power(AC208V/AC230V, 60Hz). • The voltage of main power. • The voltage applied to the unit.
Troubleshooting Guide Trouble 2 Product doesn't operate with the remote controller. Turn on main power. While the compressor has been stopped, the compressor does not operate owing to the delaying function for 3 minutes after stopped. When the compressor stopped Indoor Fan is driven by a low speed. At this point the wind speed is not controlled by the remote controller. (When operated in the Sleeping Mode, the wind speed is set to the low speed as force.) Caused by the remote controller.
Troubleshooting Guide Trouble 3 The Compressor/Outdoor Fan are don't operate Turn on the main power. Operate Cooling Mode by setting the disired temperature of the remote controller is less than one of the Indoor temperature by 1°C at least. When in air circulation mode, compressor/outdoor fan is stopped. Check the sensor for Indoor temperature is attatched as close as to be effected by the themperature of Heat Exchange (EVA.
Troubleshooting Guide Trouble 4 When indoor Fan does not operate. When indoor Fan does not operate.
Troubleshooting Guide Trouble 5 When the louver does not operate. When Vertical Louver does not operate. • Confirm that the Vertical Louver is normally geared with the shaft of Stepping Motor.
Troubleshooting Guide Error Code ■ Trouble Shooting Error code Title 01 Indoor air sensor 02 Indoor inlet pipe sensor 06 Indoor outlet pipe sensor Cause of error • Open / Short • Soldered poorly • Internal circuit error • Open / Short • Soldered poorly • Internal circuit error • Open / Short • Soldered poorly • Internal circuit error Check point & Normal condition Normal resistor : 10KΩ / at 25°C(77°F) (Unplugged) Normal voltage : 2.
Troubleshooting Guide Error code 05 / 53 Title Communication (Indoor ➔ Outdoor) Cause of error Check point & Normal condition • Power input AC 230V.(Outdoor, Indoor) • The connector for transmission is disconnected. • The connecting wires are misconnected. • Communication poorly • The GND 1,2 is not connected at main GND. • The communication line is shorted at GND. • Transmission circuit of outdoor PCB is abnormal. • Transmission circuit of indoor PCB is abnormal. ❑ Check Point 1.
Troubleshooting Guide Error code 33 Title D-Pipe Temp. High Cause of error Check point & Normal condition • Discharge sensor temp. high • Check the discharge pipe sensor. • Check the install condition for over load. • Check the leakage of refrigerent. • Check the SVC V/V open. COMP OFF 115°C(239°F) LEV OPEN(16PULSE/MIN) 100°C(212°F) 95°C(203°F) LEV OPEN(10PULSE/MIN) NORMAL ❑ Check Point 1. Check the install condition for over load. 2. Check the SVC V/V open. 3. Check the leakage of refrigerent.
Troubleshooting Guide Error code Title 44 Outdoor air sensor 45 Condensor pipe sensor 47 D-Pipe sensor Cause of error • Open / Short • Soldered poorly • Internal circuit error • Open / Short • Soldered poorly • Internal circuit error • Open / Short • Soldered poorly • Internal circuit error Check point & Normal condition Normal resistor : 10KΩ / at 25°C(77°F) (Unplugged) Normal voltage : 2.5Vdc / at 25°C(77°F) (plugged) Normal resistor : 5KΩ/ at 25°C(77°F) (Unplugged) Normal voltage : 2.
2-way, 3-way Valve 2-way, 3-way Valve 2-way Valve (Liguid Side) 3-way Valve (Gas Side) Valve cap Flare nut Hexagonal wrench (4mm) Open position Closed position To piping connection Flare nut Open position Closed position Pin To piping connection To outdoor unit Service Service port cap port To outdoor unit Works Shaft position Shaft position Service port Shipping Closed (with valve cap) Closed (with valve cap) Closed (with cap) Air purging (Installation) Open (counter-clockwise) Closed
2-way, 3-way Valve (1) Pumping down Indoor unit Liquid side 2-Way valve Close Outdoor unit Gas side 3-Way valve Indoor unit Open Liquid side 2-Way valve Close Gas side 3-Way valve Open manifold gauge Lowhandle (CLOSE) Hi- handle (CLOSE) • Procedure 1. Confirm that both the gas side and liquid side valves are set to the open position. - Remove the valve stem caps and confirm that the valve stems are in the raised position. - Be sure to use a hexagonal wrench to operate the valve stems. 2.
2-way, 3-way Valve (2) Evacuation (All amount of refrigerant leaked) Indoor unit Liquid side 2-Way valve Open Outdoor unit Gas side 3-Way valve Indoor unit Open Liquid side 2-Way valve Open Gas side 3-Way valve Open manifold gauge Vacuum pump Lowhandle (OPEN) Hi- handle (OPEN) • Procedure 1. Confirm that both the liguid side valve and gas side valve are set to the opened position. 2. Connect the vaccum pump to the center hose of the manifold gauge. 3.
2-way, 3-way Valve (3) Gas Charging (After Evacuation) Indoor unit Liquid side 2-Way valve Open Outdoor unit Gas side 3-Way valve Indoor unit Open Liquid side 2-Way valve Open Gas side 3-Way valve Charging cylinder Open manifold gauge Low-handle Check valve (OPEN) Hi- handle (OPEN) • Procedure 1. Connect the gauge to the charging cylinder. - Connect the charge hose which you disconnected from the vacuum pump to the valve at the bottom of the cylinder.
Specifications and performance data subject to change without notice. HEAT CONTROLLER, INC.
