McQuay CE 10C Installation Manual Download Page 15

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1-11

English

OVERALL CHECKING

•

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?

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.

ADDITIONAL CHARGE

•

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.

Figure V
For 2 x 3 way valve

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.

Charging Procedure For 2 X 3 Way Valve (See Figure V)

Open

Charging
Cylinder

Indoor Unit

Outdoor Unit

Liquid Side

Discharge

Valve

Open

Gas Side

Suction
Valve

Check
Valve

5) Mount the valve nuts and the service port nut onto

the 3-way valve.
•

Be sure check for any gas leakage.

AUTO RANDOM RE-START FUNCTION

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)

Caution

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.

Warning

•

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.

Model

R22 Charge (g/m)

10m

15m

20m

20C / 20CR

30/50