Technical information

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7 - Visual check of the primary heat exchanger:
- check for overheating of the exchangers fins;
- clean the exhaust side of the exchanger and fan if necessary.
8 -
Regulate the gas pressure, ignition pressure, partial flame, maximum
flame.
9 - Check proper operation of the heating safety system:
- maximum safety temperature;
- maximum safety pressure.
10 - Check the proper operation of the gas safety system:
- gas or flame safety device;
- gas valve safety device.
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Check that the electrical connections have been made in compliance
w
it h the instructions shown in the Installation Instructions.
12 - Check the efficiency of the hot water supply (flow and temperature).
13 - Check pressure in the Domestic Expansion Vessel and top up as
necessary.
14 - Check manually by turning the test knob the Temperature & Pressure
Relief Valve.
15 - Check manually by turning the test knob the Expansion Relief Valve.
16 - Check discharge pipes from both the central heating and domestic hot
water for obstructions.
17 - Check general operation of the appliance.
18 - Check the exhaust system for the combustion products.
19 - Check all unvented domestic hot water controls and systems
NOTE: These checks are not exhaustive
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K
1. - Steel chassis
2. - Expansion vessel (primary)
3. - Fan
4. - Main heat exchanger made of copper
5. - Sealed chamber
6. - Stainless steel multi-gas burner
assembly comprising :
• removable burner manifold
• two ignition electrodes
• one flame detection electrode
7. - Gas section comprising :
• two safety valves
• one modulating valve
8. - Automatic air vent
9. - Stainless steel domestic hot water tank
10. - Pump
11. - Electrical box
12. - Igniter
13. - Overheating safety device
14. - Air pressure switch
15. - Tank thermistor
16. - Heating flow thermistor
17. - Heating return thermistor
18. -Three way valve
19. - Indirect coil
20. - DHW activator
21. - Hot water control thermistor
22. - DHW expansion vessel
23. - Programmer
24. - Safety valve T&P
K. - Flue kit fixing point (refer to Section 11)
9.1 OVERALL VIEW
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