A.O. Smith SGS - 100, Installation, User And Service Manual

Page: 58 / 121

Instruction manual SGS 55
gis
5 Filling
Installation diagram
5.1 Filling unvented
installations
To fill the water heater, proceed as follows:
1. Open the stop valve (11) in the hot water pipe and, if present, the stop valves
(4) for the circulation pump (6).
2. Close the drain valve (9).
3. Open the nearest hot water draw-off point (14).
4. Open the stop valve (4) on the cold water side (A) so that cold water flows
into the water heater.
5. Completely fill the water heater. When a full water jet flows from the nearest
draw-off point, the water heater is full.
6. Bleed the entire installation of air, for example by opening all draw-off points.
Legend Vented and unvented
Unused numbers are not applicable
1.
pressure relief valve
(mandatory if the mains water
pressure is too high)
3. T&P 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 (optional)
13. condensation drain
14. draw-off points
15. expansion valve (mandatory)
16. expansion vessel
(mandatory)
17. 3-way aeration valve
(recommended)
18. cold water head tank
19. float switch
A. cold water supply
B. hot water supply
C. circulation pipe
D. gas supply
E. overflow pipe
H. overflow protection
IMD-0787 R0
VENTED
UNVENTED
A
4
19
18
E
H
17
C
S
1
37
11
11
12
12
T
T
26
42
14
14
14
Q
T
6
8
5
5
4
4
4
4
S
4
9
9
9
G
3
3
F
B
S
2
S
3
D
10
2
13
16
C
S
1
37
11
12
12
T
T
26
42
14
14
14
Q
T
6
8
5
5
4
4
4
4
S
4
9
G
3
3
F
B
B
S
2
S
3
D
10
13
4
16
16
38
38
A
4 5 1
15