10.12 Removing the stop valve
D A N G E R
•
Turn OFF all the power source switches.
N O T E
•
For servicing use the following tools:
- Pliers.
- Burner.
- Phillips screw driver.
- Wet cloth.
1
Before starting with the task, collect the refrigerant from the refrigerant circuit into a cylinder and turn OFF the unit power
supply line.
2
Remove the front service cover as described in the procedure
Removing the front service cover
, see on page 292
.
3
Remove the following covers fixed with the screws -J-:
a
Heat pump system: Remove the stop valve cover 1 -D-.
b
Heat recovery system: Remove the stop valve cover 1 -D- and stop valve cover 2 -E-.
*1
*2
*1
*2
A
B
C
D
E
J
H
H
H
G
F
I
G
F
4
When removing the high pressure gas stop valve -A- and the low pressure gas stop valve -B-, cover the stop valves
with a wet cloth to avoid the heat and remove the welding material.
When removing the liquid stop valve -C-, remove the welding from the piping of the stop valves (low pressure stop valve
-F- and high pressure stop valve -G-) .
N O T E
•
In the case of the heat pump system, connect the charge hose to the low pressure gas stop valve check
joint before removing the welding.
•
To remove the welding of the high pressure stop valve -A- and the low pressure stop valve -B-, the RC cover
should be removed to protected with a sheet of metal.
5
Remove the screws -H- that attach the plate -I- and pull out the stop valves at the same time as the plate -I- (if the stop
valves are fitted only for liquid, the stop valve can be removed without removing the plate).
6
To fit the stop valve, carry out this procedure in reverse order.
N O T E
•
Cover the stop valve with a wet cloth to avoid the heat when mounting or removing the brazing.
•
The maximum temperature allowed in the stop valves is 120 °C.
10 Servicing
317
SMGB0065 rev. 1 - 12/2010
10
