McQuay MCK025A Installation Manual download pdf (Page 14)

1-13

English

There must be a double pole switch with minimum

3mm contact gap and fuse/circuit breaker as

recommended in the fixed installation circuit.

4WV

COMP

4WV

COMP

CK40AR / CK50AR <> SL40CR / SL50CR

Outdoor Coil Sensor

Indoor Unit

Terminal

Block

Interconnection

Cable

Outdoor

Unit

Terminal

VACUUMING AND CHARGING

Vacuuming is necessary to eliminate all moisture and air from the system. The series II Outdoor Unit is provided with flare

valve fittings.

Vacuuming

Before vacuuming, perform leak check for refrigeration

circuit. After the system piping are properly connected,

connect the flexible hoses to the correct charging nipples

as shown in the diagram. Ensure that flexible hose from

charging nipples are connected to the vacuum pump via

standard servicing valves and pressure gauges (gauge

manifold). Vacuum the air conditioner system to at least

500 microns Hg. Do not start the unit when the system is

engaged in vacuuming.

Charging

Before charging, the vacuum must be held at 500 microns

Hg for at least 15 minutes, then break vacuum by charging

R-22 refrigerant. Operate the unit for 15 minutes and ensure

the refrigerant charges is of correct by monitoring running

current, gas and liquid line pressures. Suction and discharge

pipe pressure should be in the region of 75 psig and 275

psig generally.

After ensuring the system is correctly charged, remove

flexible hose from charging nipples and replace caps.

Short Duct Specification

• The indoor unit is provided with air discharge and air intake “knock-out” hole for duct connection. However the connec-

tion of the short duct for air discharge is possible on only one side.

• The use of short duct for air discharge will improve airflow distribution if there is an obstruction (such as a lighting fixture)

or in a long, narrow room or an L-shaped room. It also use for air conditioning of two rooms simultaneously.

ACCESSORY PART

Possible Direction For Air Discharge And Air Intake

Air Intake

Air Discharge

Power

Supply

Cable

CK20A(1-16)ENG 2/1/01, 10:15 AM13

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McQuay MCK025A Installation Manual Page 14

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