McQuay CE 10C Installationshandbuch Seite 14

SL 10B
SL 15B
SL 18B
SL 20B
SL 25B
SL 30C
SL 35C
SL 40C
SL 50C
SL 60C
SL 61C
• Within the value
• Lower than the value
• Too low (Ω zero)
Vacuuming Procedure For 2 x 3 Way Valve
(See Figure T)
1) Open the suction and discharge service port cap.
2) Manifold gauge connection:
• Low side hose from manifold gauge to the suction
service port.
• High side hose from manifold gauge to the discharge
service port.
• Service (center) hose from manifold gauge to the
vacuum pump.
3) Turn "ON" the power switch of the vacuum pump and
make sure that needle in the manifold gauge moved
towards -30 inHg (-76 cmHg).
4) Close the valve of both the low and high sides on the
manifold gauge, turn "OFF" the vacuum pump and
confirm that the gauge needle does not move
(approximately 3 minutes after turning "OFF" the
vacuum pump).
5) Disconnect the service hose from the vacuum pump.
Charging Procedure For 2, 3 Way Valve
(See Figure U)
1) Connect the service hose from manifold gauge to
the charging cylinder.
• Connect the service hose, which you have
disconnected from the vacuum pump, to the valve at
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 (low side) on the manifold gauge
and charge the system with liquid refrigerant.
• If the system cannot be charged with the specified
amount of refrigerant, then it should be charged little
by little (approximately 150g at each time) while
operating the air conditioner under cooling cycle.
However, one time is not sufficient, wait
approximately 1 minute and then repeat the
procedure.
4) Immediately disconnect the service hose from the
suction valve's service port.
This is different from the previous procedures. As you are charging with liquid refrigerant from the gas side (suction
line), absolutely do not attempt to charge with large amount of liquid refrigerant while operating the air conditioner.
Indoor 27°C/Outdoor 35°C
Kg/cm 2
4.5 – 5.6
4.5 – 5.6
4.5 – 5.8
4.5 – 5.6
4.0 – 4.8
4.9 – 5.3
4.9 – 5.4
4.9 – 5.5
4.9 – 5.6
4.9 – 5.5
4.9 – 5.5
- refrigerant cycle normal.
- refrigerant cycle has leaks. Checking, repairing and top-up is necessary.
- needs evacuation and charge.
! Caution
Psig Kg/cm
65.4 – 79.6 5.2 – 6.3
65.4 – 79.6 5.2 – 6.3
65.4 – 82.5 5.2 – 6.8
65.4 – 79.6 5.2 – 6.3
56.9 – 68.3 4.5 – 5.0
70.0 – 75.0 19.3 – 19.6
70.0 – 75.1 19.3 – 19.7
70.0 – 75.2 19.3 – 19.8
70.0 – 75.3 19.3 – 19.9
70.0 – 75.3 19.3 – 19.9
70.0 – 75.3 19.3 – 19.9
Figure T
For 2 x 3 way valve
Indoor Unit
Open
Vacuum Pump
6) After that, open the valve stem of the discharge and
suction valve counter-clockwise for the gas to run into
the indoor unit.
7) Check the low side pressure after turning "ON" the
compressor for 10 to 15 minutes.
Figure U
For 2, 3 way valve
Indoor Unit
Check Valve
Low
Charging
Open
Cylinder
• Stopping half-way will cause the gas to be
discharged.
• If the system has been charged with liquid
refrigerant while operating the air conditioner, then
turn off the air conditioner before disconnecting the
hose.
5) Mount the valve stem nuts and service port nut.
• Be sure to check for any gas leakage.
1-10
Indoor 32°C/Outdoor 43°C
2
74.0 – 89.6
74.0 – 89.6
74.0 – 93.9
74.0 – 89.6
64.0 – 71.1
275 – 280
276 – 280
277 – 280
278 – 280
278 – 280
278 – 280
Outdoor Unit
Liquid Side
Discharge
Valve
Close
Gas Side
Suction Valve
Close
Open
Outdoor Unit
Liquid Side
Discharge
Valve
Open
Gas Side
Suction
Valve
Open
Hi
Close
Psig