A.O. Smith SGS - 100, Installation & Service Manual

Page: 26 / 110

Installation
26 Instruction manual SGS
3
is
Note
In the above diagram, there is a non-return valve in the station. This may
only be used in closed (pressure) systems. In systems with drain back, it is
prohibited to fit a non-return valve in the solar heating system.
3.6 Water connections,
Vented
Warning
The installation should be carried out by an authorised installation engineer,
in compliance with general and local regulations (1.3 "Regulations") .
3.6.1 Cold water side
See (A) in the installation diagram (3.5 "Installation diagram") .
1. Fit an approved stop valve (4) on the cold water side between the cold water
head tank (18) and the appliance, as required by
regulations
(1.3 "Regulations") .
3.6.2 Hot water side
See (B) in the installation diagram (3.5 "Installation diagram") .
Note
Insulating long hot water pipes prevents unnecessary energy loss.
1. Fit the T&P valve (3).
2. Optional: fit a temperature gauge (12) so you can check the temperature of
the tap water.
3. Fit a stop valve (11) in the hot water outlet pipe for servicing.
4. If a circulation pipe is required, continue by installing the circulation
pipe (3.6.3 "Circulation pipe") .
Legend
Only applicable numbers are mentioned.
1. pressure-reducing valve (mandatory if the mains
water pressure exceeds 8 bar)
3. T&P valve (mandatory)
4. stop valve (recommended in pipe C and mandatory in
pipe A)
5. non-return valve (mandatory)
6. circulation pump (optional)
9. drain valve
10. manual gas valve (mandatory)
11. service stop valve (recommended)
12. temperature gauge (recommended)
13. condensation drainage (mandatory)
14. hot water draw-off points
16. expansion vessel (mandatory)
17. 3-way aeration valve (recommended)
18. water tank
19. float valve
23. pressure valve (mandatory)
26. air bleed (mandatory)
37. combined Q/T sensor (optional)
38. solar heating system pump station (modulating -
mandatory)
A. cold water supply
B. hot water supply
C. circulation pipe
D. gas supply
E. overflow pipe
F. heat exchanger supply
G. heat exchanger return
H. overflow safety
S1.collector sensor (mandatory)
S2.tank sensor (mandatory)
S3.top tank sensor (mandatory)
S4.heat exchanger discharge sensor (optional)