HTW IX39B5 Serie Manuel D'installation page 79

SPLIT 1X1 IX39B5
PREPARATIONS AND PRECAUTIONS
Air and foreign matter in the refrigerant circuit can cause abnormal rises in pressure, which can damage
the air conditioner, reduce its efficiency, and cause injury. Use a vacuum pump and manifold gauge to
evacuate the refrigerant circuit, removing any non-condensable gas and moisture from the system.
Evacuation should be performed upon initial installation and when the unit is relocated.
BEFORE PERFORMING THE EVACUATION
• Check to make sure that both high-pressure and low-pressure pipes between the indoor and
outdoor units are connected properly in accordance with the Refrigerant Piping Connection section
of this manual.
• Check to make sure all wiring is connected properly.
EVACUATION INSTRUCTIONS
Before using the manifold gauge and vacuum pump, read their operation manuals to familiarize yourself
with how to use them properly.
Manifold Gauge
Compound gauge
-76cmHg
Low pressure
valve
Pressure hose /
Charge hose
Low pressure valve
Fig. 6.1
Pressure gauge
1. Connect the charge hose of the manifold gauge to
High pressure
2. Connect another charge hose from the manifold
valve
Charge hose
Vacuum pump 3. Open the Low Pressure side of the manifold gauge.
4. Turn on the vacuum pump to evacuate the system.
5. Run the vacuum for at least 15 minutes, or until the
service port on the outdoor unit's low pressure valve.
gauge to the vacuum pump.
Keep the High Pressure side closed.
Compound Meter reads -76cmHG (-105Pa).
INSTALLATION MANUAL
7. AIR EVACUATION
77
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