Installation Manual MINISPLIT HIGH WALL AIR CONDITIONER MODELS MHC-MHH/BOC-BOH 07 MHC-MHH/BOC-BOH 09 MHC-MHH/BOC-BOH 12 MHC-MHH/BOC-BOH 18 MHC-MHH/BOC-BOH 25 Installation Manual 035T80000-000 01_MHC/BOH 07-25.
CONTENTS Safety Precautions ...................................... 4 Part List ......................................................... 5 Preparation Before Installation .................. 6 Installation Diagram .................................... 8 Installation Procedure ................................. 9 Test Operation ............................................ 13 Trouble Shooting Guide ............................ 14 Please read this installation manual carefully before starting the installation.
REQUIRED TOOLS EXTENDED PARTS 1. Refrigerant Pipe 1. Screw driver 2. Hexagonal wrench MHC-MHH/BOC-BOH Models 3. Torque wrench 07-09 12 18-25 4. Spanner Liquid size 1/4 inch 1/4 inch 3/8 inch 5. Reamer Gas size 3/8 inch 1/2 inch 5/8 inch 2. Pipe Insulation Material (Polyethylene foam 9 mm thick) 6. Hole core drill 7. Tape measure 3. Vinyl tape 8. Thermometer 4. Putty 9. Manifold Guage 10. Gas leak detector 11. Vaccum pump 12. Pipe clamp 13. Pipe Cutter 14. Flare Tool Set 15.
SAFETY PRECAUTIONS • Please read this installation manual carefully before starting installation of the unit. • This air conditioning system contains refrigerant under pressure, rotating parts and electrical connection which may be dangerous and can cause injury. Installation and maintenance of this air conditioning system should only be carried out by trained and qualified personnel. • After unpacking, please check the unit carefully for possible damage.
PART LIST Name of part Part No.
PREPARATION BEFORE INSTALLATION • Before doing any work, check the interior power supply cord and the main breaker capacity are sufficient and the installation area is sufficient and complies with the requirements. • Check that the power supply available agrees with nameplate voltage. • Electrical work, wiring and cables must be performed in compliance with national and local wiring codes and standard. • Do not use the extension cables. In the case extended cables are needed, use the terminal block.
INSTALLATION IN THE FOLLOWING PLACES MAY RESULT IN TROUBLE Installation of the indoor unit in direct sun light. Installation in the unit in wrong direction. Installation of the indoor unit in a place where there is an obstacle near the air inlet or outlet. 10 cm Installation of outdoor units too close or, blowing discharged air into each other. Installation of the outdoor unit in a place exposed regularly to a strong wind.
INSTALLATION DIAGRAM 10 cm or more Installation plate Remove the cover plate screw 60 cm or more to have access to the terminal board. 60 cm or more 70 cm or more Auto louver (vertical) Manual louver (horizontal) Vinyl tape Apply after carrying out a drainage test. * To carry out the drainage test, remove the air filters and pour water into the heat exchanger.
■ Wiring INSTALLATION PROCEDURE • This indoor unit is ready for connection to the outdoor unit. Cautions INDOOR UNIT ■ Fixing • Place the installation guide pattern on the designated installation place and mark the hole position. • Drill a hole and mount installation plate. • Never modify the unit by removing any of the safety guards or by bypassing any of the safety interlock swithces.
■ Drain hose ■ Indoor Unit Fixing • Drain hose is flexible and can be routed to suit various piping arrangements. The drain line must include elbow trap (U bend). Connect a plastic condensate pipe with an internal diameter of 12 mm. • Thread the indoor unit piping and cable through the hole. • Hang the top of the unit onto the upper ridge of them in mounting plate. • Make sure that the unit is correctly hung in place by sliding it to the left, then to the right.
OUTDOOR UNIT ■ Fixing and Piping • Piping must be performed by qualified personnel according to good refrigeration systems practices. • Piping materials and insulation materials must be of refrigerant quality. • Select the pipe diameters according to the size of unit and cut the pipe to design length by using pipe cutter. • Install the flare nuts and flare the end of the pipes. • Check that no foreign bodies are inside the piping. • Align the central of the connecting pipes and tighten the flare nut.
■ Vertical Discharge Condensing Unit (H*DA, H*DB, H*RA) The indoor unit and interconnecting wiring voltage is 220 volts. Where the outdoor unit requires a different operating voltage such as 24 volts one of the following solutions can be applied. 1. The coil of the relay switching the compressor and reversing valves should be changed to a 220V coil. 2. A transformer should be installed to supply 24 volts and a relay installed with a 220 volt coil to switch the 24 volts required by the outdoor units.
TEST OPERATION CHECK THIS ITEM BEFORE START OPERATION Outdoor • Check the flare nut connections, valve stem cap connections and service cap connections for gas leak with a leak detector or soap water. Indoor • • • • • Check the unit is firmly fixed. Check the connecting pipes are tighten securely. Check the pipe insulation. Check the drainage. Check the connection of the grounding wire.
TROUBLE SHOOTING GUIDE Probable cause Problem A. The air conditioner does not run. 1. Power Failure. 2. Fuse blown or circuit breaker open. 3. Voltage is too low. 4. Faulty contactor or relay. 5. Electrical connections loose. 6. Thermostat adjustment too low (in heating mode) or too high (in cooling mode) 7. Faulty Capacitor 8. Incorrect wiring, terminal loose 9. Pressure switch tripped B. The outdoor fan runs but the compressor will not start. 1. Motor winding cut or grounded. 2. Faulty Capacitor. C.
TECHNICAL SPECIFICATION INDOOR UNIT MHC-MHH Indoor Unit 07 Models Outdoor Unit 09 12 18 25 18 25 BOC-BOH 07 09 Ph 1 1 1 1 1 kW 0.7 0.85 1.2 2 2.8 Running Current A 3.5 4.5 5.6 9.1 11.
■ R407C Models Power Supply Power Consumption Running Current Outdoor MOL-MOM 07 Unit 09 12 18 25 1 220/240/1/50 V/Ph/Hz Ph 1 1 1 1 kW 0.77 0.93 1.34 1.77 2.65 A 3.52 4.32 6.12 8.12 12.
■ MMC-MMH Models Power Supply Power Consumption Outdoor Unit MMC-MMH 018 021 025 1 1 1 1 1 kW 2x0.85 0.85x1.20 2x1.20 2x1.73 2x2.26 A 2x4.5 4.5x5.7 2x5.7 16.9 Rotary Compressor 26.5 Recip R-22 Refrigerant Type Power Consumption 050 Ph Running Current Power Supply 036 220-240/1/50 or 380-415/3/50 V/Ph/Hz 208-230/1/60 V/Ph/Hz Ph 1 1 1 1 1 kW 2x0.85 0.85x1.20 2x1.20 2x1.73 2x2.26 A 2x4.5 4.5x5.7 2x5.7 16.9 Running Current Rotary Compressor 26.
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DE - COMMISSIONING DISMANTLING & DISPOSAL This product contains refrigerant under pressure, rotating parts, and electrical connections which may be a danger and cause injury! All work must only be carried out by competent persons using suitable protective clothing and safety precautions. Read the Manual Risk of electric shock Unit is remotely controlled and may start without warning 1. Isolate all sources of electrical supply to the unit including any control system supplies switched by the unit.
