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6.4 First Time Installation
The indoor units and the pipes between indoor and outdoor units must be leak tested and evacuated in
order to remove gas and moisture from the system. If not, the air and moisture in the refrigerant system
can cause undesirable effects such as the ones shown 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.
6.4.1 Gas Leak Check (Soap Water Method)
Apply soap water or a neutral liquid detergent to the indoor unit, line set connections, and
service ports with a soft brush. If bubbles start forming, there is a leak at the connection where
the bubbles form.
6.4.2 Air Purging with a Vacuum Pump
Procedure:
1.
Tighten the flare nuts of the indoor and outdoor units. Confirm that both the 2-way and 3-way
valves are set to the closed position.
2.
Connect the charge hose with the push pin of Handle Lo (low pressure side) to the 3-way valve
’
s
gas side service port.
3.
Connect the charge hose of Handle Hi (high pressure side) connection to the vacuum pump.
4.
Fully open the Handle Lo of the manifold valve.
5.
Operate the vacuum pump to evacuate.
Summary of Contents for 12H47YIMI
Page 10: ...10 1080 mm 226 mm 335 mm 30H48ZIMI 49 57 1259 mm 11 1 282 mm 14 25 362 mm 36H46ZIMI...
Page 19: ...19 Model Voltage V Capacity BTU Type 12H47ZOMI 230 12 000 HEAT PUMP...
Page 56: ...56 P W N U...
Page 57: ...57 N V N W...
Page 82: ...82 7 Then lift the PCB assembly off the unit NOTE All wires are still connected...