Draining
48 Instruction manual GWV
6
gis
6.2 Draining unvented
installations
Some service activities require the appliance to be drained. The procedure is as
follows:
1. Activate the
MENU
with .
2. Position the cursor in front of
OFF
.
3. Confirm
OFF
with .
4. Wait until the fan has stopped. The symbol is then dimmed.
Caution
Failure to wait until the fan stops purging can cause damage to the
appliance.
Vented
Legend
Only applicable numbers are mentioned.
1. pressure-reducing valve (mandatory if the mains
water pressure exceeds 8 bar)
2. inlet combination (mandatory)
3. expansion valve
4. stop valve (recommended)
5. non-return valve (mandatory)
6. circulation pump (optional)
9. drain valve
10. manual gas valve (mandatory)
11. service stop valve
12. temperature gauge (recommended)
14. hot water draw-off points
15. expansion valve (mandatory)
16. expansion vessel (mandatory)
18. water tank
19. float valve
23. P-valve
A. cold water supply
B. hot water supply
C. circulation pipe
D. gas supply
E. overflow pipe
H. overflow safety
4
4
14 14 14
6
5
4
23
3
11
11
11
D
10
9
9
B
A
4
18
19
E
H
17
C
IMD-
4
7 R2
MENU
»OFF
^ ON
È WEEK PROGRAM
