Vacuuming And Charging; Accessory Parts - McQuay CK20AR Installation Manual

CK40AR / CK50AR <> SL40CR / SL50CR
A
4WV
OF
Indoor Unit
COMP
Terminal
L
Block
N
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.
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.
Possible Direction For Air Discharge And Air Intake
CK20A(1-16)ENG
Outdoor Coil Sensor
Interconnection
Cable

VACUUMING AND CHARGING

ACCESSORY PART
Air Discharge
Air Discharge
13
A
4WV
OF
Outdoor
COMP
Unit
L
Terminal
N
R
S
T
Power
N
Supply
Cable
There must be a double pole switch with minimum
!
3mm contact gap and fuse/circuit breaker as
recommended in the fixed installation circuit.
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.
Air Discharge
Air Intake
Air Discharge
1-13
2/1/01, 10:15 AM