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6
Draining
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. | 13. condensation drainage | B. hot water supply | ||
| (mandatory if the mains water | (mandatory) | C. circulation pipe | |
| pressure exceeds 8 bar) | 14. hot water | 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. | G. heat exchanger return | |
(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)
6.1Draining unvented
installations | 1. Activate the MENU with . |
MENU »OFF ^ ON
È WEEK PROGRAM
2. | Position the cursor in front of OFF. | |
3. | Confirm OFF with | . |
4. | Wait until the fan has stopped. The symbol is then dimmed. | |
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| Caution |
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| Failure to wait until the fan stops purging can cause damage to the |
appliance.
5.Switch the appliance OFF (position 0) using the ON/OFF switch on the control panel.
6.Isolate the water heater from the power supply by putting the isolator between the appliance and the mains power supply to position 0.
7.Shut off the gas supply (10).
8.Close the stop valve (11) in the hot water pipe.
9.Close the supply valve (4) in the cold water supply (A).
10.Open the drain valve (9).
11.Bleed the appliance (or installation) so that it drains completely.
54 | Instruction manual SGE |