Additional Charge; Overall Checking; Auto Random Re-Start Function - McQuay CE 10C Installationshandbuch

Charging Procedure For 2 X 3 Way Valve (See Figure V)
1) Connect the service hose from the manifold gauge to
the charging cylinder.
• Connect the service hose, which you have
disconnected from the vacuum pump, to the valve at
the bottom of the cylinder.
• If you are using a gas cylinder, then use a scale and
reverse the cylinder so that the system can be charged
with liquid.
2) Purge the air from the service hose.
• Open the valve at the bottom of the cylinder and press
the check valve suction on the manifold gauge to
purge the air (be careful with the liquid refrigerant).
The procedure is the same if you are using a gas
cylinder.
3) Open the valve (high side) on the manifold gauge
and charge the refrigerant to the system (unit).
• Be sure to open only the valve (high side) on the
manifold gauge to charge the system from the
discharge pipe (liquid side).
4) Immediately disconnect the service hoses from the
3-way valve service port.
• The refrigerant gas has already been charged into the
outdoor unit. If the piping length is not more than 5m,
then additional charge of the refrigerant after
vacuuming is not necessary.
• When the piping length is more than 5m, please use the
charge as tabulated in the table.
• Ensure that:
1) The unit has been mounted solidly and rigid in
position.
2) The piping and connections are leak-proof after the
charging.
3) Proper wiring has been installed.
• Drainage check
– pour some water into the left side of the drain pan
(the drainage is at the right side of the unit).
• Test run:
1) Conduct a test run on the unit after having perform
the water drainage test and the gas leakage test.
2) Check the following items:
a) Is the electrical plug inserted firmly into the socket?
• Disconnect from the main power supply before servicing the air conditioner unit.
• DO NOT pull out the power cord when the power is ON. This may cause serious electrical shocks which may
result in fire hazards.
If there is a power cut when the unit is operating, it will automatically resume the same operating mode when the power
is restored. (Applicable only to units with this feature)
Before turning off the power supply, set the remote controller's ON/OFF switch to the "OFF" position to prevent the
nuisance tripping of the unit.
If this is not done, the unit's fans will start turning automatically when power resumes, posing a hazard to service
personnel or the user.

ADDITIONAL CHARGE

OVERALL CHECKING

! Warning

AUTO RANDOM RE-START FUNCTION

! Caution
1-11
Figure V
For 2 x 3 way valve
Indoor Unit
Liquid Side
Gas Side
Close
Check
Charging
Valve Open
Cylinder
5) Mount the valve nuts and the service port nut onto
the 3-way valve.
• Be sure check for any gas leakage.
Model R22 Charge (g/m)
7m
20C / 20CR 30/50 75/125
25C / 25CR 76/100 190/250
30C / 30CR 100/100 250/250
40C / 40CR 100/100 250/250
50C / 50CR 100/100 250/250
61C / 61CR 100/100 250/250
62C / 62CR 100/100 250/250
b) Is there any abnormal sounds from the unit?
c) Is there any abnormal vibrations on the unit or the
piping?
d) Is the drainage of water smooth?
• Confirm that:
1) The condenser fan is running. Check the warm air
blowing from the condensing unit.
2) The evaporator blower is running and discharge cool
air.
3) The suction (low side) pressure is as recommended.
4) The remote controller incorporates a 3-minute delay
protection in the circuit, whereby the outdoor
condensing unit requires about 3 minutes delay
before it can start operating.
Outdoor Unit
Discharge
Valve
Open
Suction
Valve
Open
10m 15m 20m
150/250 225/375
380/500 570/750
500/500 750/750
500/500 750/750
500/500 750/750
500/500 750/750
500/500 750/750