MINISPLIT Single Circuit Cooling only and Heat Pump Systems Models MOC / MOH 07 to 55 G Series TECHNICAL GUIDE Outdoor air cooled condensing units n e i b m a w Lo “ ” e n i l t MOC /MOH 45 to 55 MOC /MOH 25 & 35 R407c MOC / MOH 07 to 18 YORK ®
List of contents Page 1 -Safety .....................................................................................................................................................................................3 2 -Outdoor units ......................................................................................................................................................................3 3 -Technical Specifications ...................................................................................
1 - Safety 2 - Outdoor units Installation and maintenance of this air conditioning system should only be carried out by trained and qualified personnel. Regular maintenance operations such as cleaning the coils and air filters must be performed to keep the units in proper operating condition. The units are shipped complete with a charge of R407c refrigerant sufficient for a piping length of 7,5 metres.
- Dimensions Overall dimensions MOC/MOH 07 to 18 MOC/MOH 25 to 35 W L L MOC/MOH 45 to 55 W L W Distances between mounting hole centres MOC/MOH L (cm) W (cm) 07-09-12 18 25 35 - 55 49.7 51.7 55 74 24,8 29.6 31.5 37.5 Outdoor unit clearances A minimum of clearance is necessary around the units to ensure proper air circulation and easy access for maintenance.
- Installation Unit installation entails: - unit mounting - refrigerant piping connections - condensate water drainage connections - unit wiring connections. OK Whatever type of installation is chosen for the unit, the following installation rules must be observed: - The location selected for unit installation must be capable of withstanding the weight of the unit in its full operating configuration.
- Refrigerant circuit connections Make piping runs as short as possible and avoid all unnecessary changes in direction or elevation. Insulation To prevent heat loss, the two lines must be insulated separately Use an appropriate bending tool to form curves and avoid flattening the refrigerant tubes. Fix piping with pipe clamps and make sure that any eventual pipe vibrations cannot be transmitted to the building structure.
- Electrical connections MOC 07 - 25 - Cooling only E E A MOH 07 - 25 - Heat pump Indoor unit N 1 2 N 1 2 E E A N 1 2 N 1 2 Indoor unit 3 3 Outdoor unit Power supply 220V/1Ph/50Hz Outdoor unit Power supply 220V/1Ph/50Hz MOC 35 - 55 - Cooling only E N E R 1 S T 2 N 1 MOH 35 - 55 - Heat pump Indoor unit 2 E N 1 2 3 Indoor unit E R S T N 1 2 3 Outdoor unit outdoor unit Power supply 380V/3Ph/50Hz Power supply 380V/3Ph/50Hz Wire sizes MOC / MOH Power supply 07 0
- Defrost Defrost is handled via a defrost management electronic control board (model with two potentiometers and 6 dip switches, see diagram n°2). This enables defrost cycles to be initiated when the temperature reaches -5°C at the condenser coil bend. The end of defrost cycle set point is +10°C. The duration of the defrost cycle varies depending on operating conditions but it is limited to a maximum of 10 minutes. Time delay between successive defrost cycles is 30 minutes.
- Regulator 9.1 - Low temperature kit Installation of the low temperature kit should be envisaged whenever a unit must operate in cooling mode (in heating mode the kit is bypassed), at temperatures below the standard operating limits. If the kit is not installed and the unit is operated under such conditions, condensing pressure will be so low that the indoor unit coil will become frosted.
- Trouble-shooting guide Note : Open the main unit power switch before proceeding with any repair operations.
10 - Trouble-shooting guide (Cont’d) Frosted indoor coil Ice build-up on indoor coil Low refrigerant charge, refrigerant leak Repair the leak and recharge Insufficient airflow Check the condition of the air filters Check the cleanliness of the indoor coil Check fan motor operation Check that the air damper opens correctly (on units equipped with a damper) Low operating temperature limit exceeded Install a low temperature kit Unit noisy Faulty installation Compressor noisy Make sure vibration isolat
11 - Accessories Floor supports and wall supports Type of support Floor Wall MOC-MOH Ref. A B C 07 to 18 25 to 55 07 to 12 18 25 to 55 AMF44B AMF50A AMW42A AMW50A AMW65A 350 500 420 495 650 100 100 500 600 750 100 100 44 44 44 A B Model AMW65A only C B A C Wall mounting support Floor support 12 - Technical appendix Unit Capacity Capacity correction factor for piping length (C2) Total cooling capacity can be determined by using correction factors C1, C2 and C3.
12 - Technical appendix (cont’d) Cooling circuit diagrams Outdoor unit Indoor unit Outdoor unit Cooling only - MOC 07-09-12-18-25 Indoor unit Heat pump - MOH 07-09-12-18-25 Legend: 1. Compressor 2. Outdoor unit coil 3. Capillary tube 4. Indoor unit coil 5. Refrigerant circuit piping 6. Isolating valve with pressure tap Outdoor unit 7. 8. 9. 10. 11.
YORK ® Contractor Location : Order/invoice number : Installation start-up date : Minisplit unit start-up check-list Equipment reference numbers Indoor unit Outdoor unit Type Type Serial Number Serial Number Power supply and unit Single phase 3 Ph1-2 = V A Neutral interconnection cables Ph/N = V Ph2-3 = V A yes with corresponding currents Ph = A V A no Ph3-1 = 2 Power supply cable Guage = mm Length = Interconnection cable Guage = mm2 Length = Type of line protection Type Current = Check that all electri
CONFORMITY DECLARATION FOR MACHINES WE: C.R. YORK, S.L. PASEO ESPRONCEDA, 278, 08.
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 1. 2. 3. 4.
