5

Filling

gis

Legend

11. service stop valve (recommended) 38. solar heating system pump station

Only applicable numbers are

12. temperature gauge

(modulating - mandatory)

mentioned.

(recommended)

A. cold water supply

1.

pressure-reducing valve

13. condensation drainage

B. hot water supply

 

(mandatory if the mains water

(mandatory)

C. circulation pipe

 

pressure exceeds 8 bar)

14. hot water draw-off points

D. gas supply

3.

T&P valve (mandatory)

15. expansion valve (mandatory)

E. overflow pipe

4.

stop valve (recommended in pipe C 16. expansion vessel (mandatory)

F. heat exchanger supply

5.

and mandatory in pipe A)

17. 3-way aeration valve

G. heat exchanger return

non-return valve (mandatory)

(recommended)

H. overflow safety

6.

circulation pump (optional)

18. water tank

S1.collector sensor (mandatory)

9.

drain valve (mandatory)

19. float valve

S2.tank sensor (mandatory)

10. manual gas valve (mandatory)

23. pressure valve (mandatory)

S4.heat exchanger discharge sensor

20. pressure valve (mandatory)

37. combined Q/T sensor (optional)

(optional)

26. air bleed (mandatory)

5.1Filling the appliance

5.1.1Filling unvented installations

To fill the appliance, 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 appliance.

5.Completely fill the appliance. When a full water jet flows from the nearest draw-off point, the appliance is full.

6.Bleed the entire installation of air, for example by opening all draw-off points.

7.The appliance is now under water supply pressure. There should be no water coming out of the expansion valve (15), nor the T&P valve (3). If this does happen, the cause might be:

- The water supply pressure is greater than the specified 8 bar. Rectify this by fitting a pressure reducing valve (1).

- The expansion valve in the protected cold supply setup is defective or incorrectly fitted.

5.1.2Filling vented installations

To fill the appliance, 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 appliance.

5.Completely fill the appliance. When a full water jet flows from the nearest draw-off point, the appliance is full.

6.Bleed the entire installation of air, for example by opening all draw-off points.

7.The appliance is now under water supply pressure. There should be no water coming out of the T&P valve (3). If this does happen, the T&P valve might be defective or incorrectly fitted.

50

Instruction manual SGE

Page 50
Image 50
A.O. Smith SGE service manual Filling the appliance Filling unvented installations, Filling vented installations