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13.0
COMMISSIONING AND TESTING
13.1
ELECTRICAL INSTALLATION
Notes on the requirements for electrical installation are provided in
Section 11:
ELECTRICAL SUPPLY
. A schematic
drawing of the control circuit is shown in
Figure 11.5
13.2
GAS INSTALLATION
For design see
Section 7: GAS SUPPLY.
See
Section 2.0: PRINCIPAL PARTS
for details on the position of the
gas connection.
13.3
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 building return 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.
13.4
COMMISSIONING THE EQUIPMENT
13.4.1
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 are clear.
2.
Adequate ventilation exists in the plant room (if necessary)
3.
The system is fully charged with water, ready to receive heat. All necessary valves are open and the
building return pump (if fitted) is circulating water.
4.
The gas supply pipework is clear of any loose matter, tested for soundness and purged.
5.
The condensate drain is installed correctly and the condensate trap is filled with water.
NOTE: If the condensate trap is not filled before use, products of combustion may escape and can lead to
severe personal injury or death
13.4.2
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 14: 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 sense electrode lead is connected correctly. Ensure the ceramic sheath
around the flame sense electrode is not cracked or broken.
2.
Ensure electricity supply is connected.
3.
Check that the circulating pump is fully bled.
