Mirage IVEH121A, Owner'S Manual

Page: 57 / 62

57
Air Evacuation
Preparations and Precautions Evacuation Instructions
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 man-
ifold 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 unit is relocated.
Before using the manifold gauge and vacuum
pump, read their operation manuals to familiarize
yourself with how to use them properly.
1. Connect the charge hose of the manifold
gauge to service port on the outdoor unit’s low
pressure valve.
2. Connect another charge hose from the mani-
fold gauge to the vacuum pump.
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.
BEFORE PERFORMING EVACUATION