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12.0
COMMISSIONING AND TESTING
12.1
ELECTRICAL INSTALLATION
Notes on the requirements for electrical installation are provided in Section 11: ELECTRICAL SUPPLY.
Schematic drawings of the control circuit are shown in Figure 11.2 and 11.3.
12.2
GAS INSTALLATION
For design see Section 7: GAS SUPPLY. See Figure 3.1 for details on the position of the gas connection.
12.3
WATER CONNECTIONS
For design see Section 10: WATER CONNECTIONS
The system should be thoroughly flushed out with cold water without any circulating pump in position.
Ensure all the valves are open.
If a secondary pump is to be fitted, it should be fitted before the system is filled and air locks cleared. Check the
system for leaks and repair as necessary. If the system is configured in an unvented arrangement, check the
expansion vessel cushion pressure.
12.4
COMMISSIONING THE EQUIPMENT
12.4.1
GENERAL CHECKS PRIOR TO LIGHTING
A person deemed competent MUST be responsible for the commissioning of this equipment. Before
attempting to commission any equipment, ensure that personnel involved are aware of what action is
about to be taken and begin by making the following checks:
1.
Flueway passages to chimney are clear.
2.
Adequate ventilation exists in the plant room.
3.
The system is fully charged with water, ready to receive heat. All necessary valves are open and the
secondary pump (if fitted) is circulating water.
4.
The gas supply pipework is clear of any loose matter, tested for soundness and purged.
5.
Any condensate drain fitted to the flue system is installed correctly and the condensate trap is filled with
water.
NOTE:
If a condensate trap is not filled before use, products of combustion may escape and can lead to
severe personal injury or death
12.4.2
EQUIPMENT CHECKS PRIOR TO LIGHTING
This unit has been designed for a nominal gas inlet pressure of 20 mbar when used on natural gas.
Information relating to propane firing can be found in Section 13: LPG FUEL.
1.
Gas supply is connected but turned to the "off" position. Any unions or fittings are correctly tightened,
test points are closed and the flame rectification probe lead is connected correctly. Ensure the ceramic
sheath around the flame rectification probe is not cracked or broken.
2.
Ensure electricity supply is connected.
3.
Check that the circulating pumps are fully bled.
4.
Remove the temperature overheat limit switch bulb from the pocket and by carefully applying a heat
source to the bulb the reset pin should operate. If satisfactory cool the bulb, reset the thermostat and
refit the bulb in its pocket.
5.
Check that the combustion products discharge safety device (TTB) is correctly fitted to the appliance
draught diverter.
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