A.O. Smith BFC-120, Installation, User And Service Manual

Page: 56 / 126

7.3 Installation diagram
Fig. Installation diagram
IM D -0 7 8 7 R 0
V E N T E D
U N V E N T E D
A
4
1 9
1 8
E
H
1 7
C
S
1
3 7
11
11
1 2
1 2
T
T
2 6
4 2
1 4
1 4
1 4
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
1 0
2
1 3
1 6
C
S
1
3 7
11
1 2
1 2
T
T
2 6
4 2
1 4
1 4
1 4
Q
T
6
8
5
5
4
4
4
4
S
4
9
G
3
3
F
B
B
S
2
S
3
D
1 0
1 3
4
1 6
1 6
3 8
3 8
A
4 5 1
1 5
1. Pressure reducing valve
(mandatory) 10. Manual gas valve
(mandatory)
19. Float switch C. Circulation pipe
23. Pressure valve
(mandatory)
D. Gas supply
2. Inlet combination
(mandatory) 11. Service stop valve
(recommended)
E. Overflow pipe
26. Air bleed (mandatory) F. Supply heat exchanger
3. T&P valve 12. Temperature gauge
(recommended)
37. Combined Q/T sensor
(optional)
G. Heat exchanger return
4. Stop valve (recommended) H. Overflow protection
5. Non-return valve
(mandatory) 13. Condensation drain
(mandatory)
38. Solar heating system
pump station
(modulating–mandatory)
S
1
Collector sensor
(mandatory)
6. Circulation pump (optional),
pump flow 1500 l/h, e.g.
Grundfos ST 15/11-2 14. Draw-off points
16. Expansion vessel
(mandatory)
42. Solar heating system
controller
S
2
Tank sensor
(mandatory)
S
3
Top of tank sensor
(mandatory)
8. Program-controlled pump
(mandatory) 17. 3-way aeration valve
(recommended)
A. Cold water supply S
4.
Solar heating system
return sensor (optional)
9. Drain valve 18. Cold water head tank B. Hot water supply
56 Installation, Maintenance and Service part