HAMWORTHY HEATING LTD
21
UPTON FLOOR STANDING SERIES
500001340/C
7.2 Checks prior to lighting the boiler
Note:
Refer to Appendix A, Gas Data Tables, for maximum inlet pressure for normal operation.
7.2.1 The Following checks must be made prior to lighting the boiler;
1. Open the front cover to gain access to the boiler components. The cover is secured with four socket head
screws, requiring an Allen Key. Carefully lift off the cover to expose the boiler components and installer wiring
connections.
Note:
Before starting the boiler commissioning procedure verify the following;
2. Ensure that all external controls are not demanding that the boiler commences operation.
3. Ensure that the gas supply is connected, but the boiler module gas service valve(s) are
closed
, any unions or
fittings are correctly tightened and test points are
closed
.
4. Check that the heating system has been flushed and refilled and that air has been purged from all high points.
5. Ensure that the system isolating valves are in the open position and that the water pressure within the heating
system is correct. Minimum pressure 0.5barg.
6. Ensure that the flue ducts are correctly fitted and that they are free from obstruction. Check that the outlet
terminal is located correctly and in accordance with regulations.
7. Ensure that the gas supply has been properly purged and verified for gas soundness. A purge and soundness
certificate should be available from the gas pipe work installation contractor.
8. Turn on the mains gas supply. Check that sufficient gas pressure is available at the boiler, nominal 20mbar
(minimum 17.5mbar) Natural Gas or nominal 37mbar (minimum 25mbar) LPG.
10.Ensure that all electrical connections made to the boiler are correctly sized and installed. Refer to wiring
diagram in Figure 9.3.1
11 Check that the boiler controls wiring has not been modified. Any modification could lead to boiler failure.
7.2.2 Gas inlet pressure test
The gas pressure must be checked at the inlet to the boiler. This is to ensure that the gas pressure is both
constant and sufficient to provide full burner output. To verify this the pressure has to be taken as a static and a
dynamic reading. The dynamic reading cannot be taken until the boiler has been started
-
refer to 8.4
The gas inlet pressure test point is at the rear of the appliance adjacent to the inlet gas connection.
7.3 Commissioning the Boiler
Once the preliminary checks have been completed and the gas inlet pressure has been verified as correct,
commissioning of the boiler modules may begin.
Fig 7.2.1
-
On/Off switch
Gas Isolation Valve
On/Off Switch
