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
12
B
A
4
18
19
E
H
17
C
IMD-0487 R2
MENU
»OFF
^ ON
È WEEK PROGRAM
Summary of Contents for GWV - 120
Page 2: ...www aosmithinternational com your installer ...
Page 4: ...4 Instruction manual GWV gis ...
Page 8: ...Table of contents 8 Instruction manual GWV ...
Page 12: ...Introduction 12 Instruction manual GWV 1 gis ...
Page 40: ...Installation 40 Instruction manual GWV 3 is ...
Page 42: ...Conversion to a different gas category 42 Instruction manual GWV 4 is ...
Page 46: ...Filling 46 Instruction manual GWV 5 gis ...
Page 58: ...Starting and running 58 Instruction manual GWV 9 gis ...
Page 60: ...Shutting down 60 Instruction manual GWV 10 gis ...
Page 72: ...Service program 72 Instruction manual GWV 12 is ...
Page 86: ...Troubleshooting 86 Instruction manual GWV 13 gis ...
Page 88: ...Maintenance frequency 88 Instruction manual GWV 14 is ...
Page 98: ...Appendices 98 Instruction manual GWV 17 is ...
Page 100: ...Instruction manual GWV 100 ...
Page 102: ...0307 971 4 0 UK Index Instruction manual GWV ...