Draining Unvented Installations - A.O. Smith GWV - 120 Installation And Service Manual

6
Vented
17
H
A
19
E
4
18
4
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)
6.2 Draining unvented
installations
48
Draining
12
14 14
11
B
C
3
4
6
5
4
11
11
9
14.
15.
16.
18.
19.
23.
A.
B.
C.
D.
E.
H.
Some service activities require the appliance to be drained. The procedure is as
follows:
1. Activate the MENU with
MENU
»OFF
^ ON
È WEEK PROGRAM
2. Position the cursor in front of OFF.
3. Confirm OFF with
4. Wait until the fan has stopped. The symbol
Caution
Failure to wait until the fan stops purging can cause damage to the
appliance.
14
D
10
23
hot water draw-off points
expansion valve (mandatory)
expansion vessel (mandatory)
water tank
float valve
P-valve
cold water supply
hot water supply
circulation pipe
gas supply
overflow pipe
overflow safety
.
.
is then dimmed.
Instruction manual GWV
gis
9
IMD-0487 R2