D-EIMHP01601-22_01EN 12/26
9.3
Leak test and vacuum drying
The units were checked for leaks by the manufacturer.
After connection of the piping, a leak test must be performed and the air in the refrigerant piping must be evacuated to a value of
4 mbars
absolute by means of a vacuum pump.
9.4
Open the discharge- and liquid stop valves.
1 t o o pe n
- Remove the cap (1) and turn the shaft (2) counterclockwise with hexagon socket screw keys (3) (
JIS B 4648
nominal
size
4 mm
).
- Turn it all the way until the shaft stops.
- Tighten the cap firmly.
2 t o c lo s e
- Remove the cap and turn the shaft clockwise.
- Tighten the shaft firmly until it reaches the sealed area (4) of the body.
- Tighten the cap firmly.
Figure 7- Charging the unit
NOTES
•
Use a charging hose with push rod when using the service port (5).
•
Make sure to keep stop valve open during operation.
•
Check for refrigerant gas leakage after tightening the cap.
Do not purge the air with refrigerants. Use a vacuum pump to vacuum the installation.
Table 4-Charging the unit
Refrigerant charge (kg)
EWLQ014
0.9+(0.06xLLP) +(VRCx0.38)
EWLQ025
1.5+(0.12xLLP) +(VRCx0.38)
EWLQ033
2.0+(0.12xLLP) +(VRCx0.38)
EWLQ049
2x[2.0+(0.12xLLP) +(VRCx0.38)]
EWLQ064
2x[2.0+(0.12xLLP) +(VRCx0.38)]
VRC= volume of remote condenser (l)
LLP= length of liquid pipe (m)
9.5
Next perform a fine-tuning
For fine-tuning of the refrigerant charge, the compressor must operate.
•
If the liquid-line sight glass is showing seal after the rough charging (due to possible different conditions), add
Summary of Contents for EWLQ025KCW1N
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