COMFORT-AIRE A-DVC09SF-0, Руководство по обслуживанию

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Service Manual - DVC 09/12/18/24 SF Series
19
Procedure:
1). Confirm that both the 2-way and 3-way
valves are set to the opened position.
2). Connect the vacuum pump to 3- way valve’s
service port.
3). Evacuation for approximately one hour.
Confirm that the compound meter
indicates
500 microns .
4). Close the valve (Low side) on the charge set,
turn off the vacuum pump, and confirm that the
gauge needle does not move (approximately 5
minutes after turning off the vacuum pump).
5). Disconnect the charge hose from the vacuum
pump.
2. Refrigerant charging
Procedure:
1). Connect the charge hose to the charging
cylinder, open the 2-way valve and the 3-way
valve
Connect the charge hose which you
disconnected from the vacuum pump to the
valve at the bottom of the cylinder. If the
refrigerant is R410A, make the cylinder bottom
up to ensure liquid charge.
2). Purge the air from the charge hose
Open the valve at the bottom of the cylinder
and press the check valve on the charge set to
purge the air (be careful of the liquid
refrigerant).
3) Put the charging cylinder onto the electronic
scale and record the weight.
4). Open the valves (Low side) on the charge set
and charge the system with liquid refrigerant
If the system cannot be charge
d with the
specified amount of refrigerant, or can be
charged with a little at a time (approximately 5
oz. each time) , operating the air conditioner in
the cooling cycle . If one time is not
sufficient, wait approximately 1 minute and
then repeat the procedure.
5).When the electronic scale displays the proper
weight, disconnect the charge hose from the
3-
way valve’s service port immediately .
If the system has been charged with liquid
refrigerant while operating the air conditioner,
turn off the air conditioner before disconnecting
the hose.
6).
Reinstall the valve stem caps and the service
port cap . Use torque wrench to tighten the
service port cap to a torque of 18N.m.
Be sure to check for gas leakage.