HAMWORTHY HEATING LTD
21
SPETISBURY
500001118/C
11.0 COMMISSIONING AND TESTING
11.1 Electrical Installation
Wiring
MUST
be checked by a suitably competent
person. An isolator correctly fused should be sited close
to the boiler. Refer to section 9 and 10 of this manual.
11.2 Gas Installation
For design see
Section 5: GAS SUPPLY.
The whole of the gas installation including the meter
must be inspected and tested for soundness and
purged in accordance with the recommendations of
IGE/UP/1
or
IGE/UP/1A
as appropriate.
11.3 Water Circulation System
For design see
Section 8: WATER SYSTEM.
The system should be thoroughly flushed out with cold
water without the pump in position. Ensure all the
valves are open.
With the pump fitted the system should be filled and air
locks cleared. Vent the radiators and check for leaks.
If the system is unvented the pressurization unit should
not be utilized for the initial filling. This should be carried
out using a WRC approved double check valve and
temporary filling loop. In order to comply with local
Water Authority Regulations, this loop must be
disconnected when filling is complete. Water treatments
should not be fed through the pressurization unit unless
permitted by the manufacturer. Check the expansion
vessel cushion pressure as detailed by the
manufacturer's Installer's Guide.
11.4 Commissioning The Boiler
Only competent persons registered for working on
non domestic gas appliances should attempt the
following: Before attempting to commission any
boiler, 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 as per
Section 7: AIR SUPPLY
exists in the boilerhouse.
3)
The system is fully charged with water, ready to
receive heat. All necessary valves are open and the
pump is circulating water.
4)
The pipework and valve arrangement is installed to
Hamworthy Heating recommendations in such a way
that water flow rates will be in accordance with Figure
3.1.
5)
The gas supply pipework is clear of any loose matter,
tested for soundness and purged to
IGE/UP/1
or
IGE/
UP/1A
as appropriate.
11.4.1 Boiler Checks Prior To Lighting
BEFORE
starting the boiler, check the following:
a.
Check that fuel supply is turned off.
b.
Check that electrical supply is isolated.
c.
Check that electrical installation conforms to the
requirements of these Instructions, the IEE Wiring
Regulations for electrical installations, and any other
local Regulations which apply.
d.
Check boiler castings are undamaged. Remove
access plates to check flue plates are correctly
located in sections, then replace and reseal.
e.
Check all thermostat bulbs are correctly inserted
in the appropriate pockets on the upper and lower
faces of the front casing.
f.
Check for water leaks and ensure that both boiler
and heating system is full of water and properly
vented. On SP 280 and 340 models check
distribution tube is fitted.
g.
Check that all drain cocks are closed, and that all
isolating valves in flow and return pipework are
open.
h.
Check soundness of gas installation and that
pipework is purged of air, as detailed in I. Gas. E.
Publications IGE/UP/1 or IGE/UP/1A respectively.
Check that gas meter is operational and has been
checked by the local region of British Gas.
j.
Check that gas meter and supply pipework is of
sufficient size to meet the input rating of the burner/
boiler. Refer to Figure 15.2.
k.
Check that burner output is correct for size of
boiler in question, referring to Figure 15.7
Note: -
Refer to the firing procedure of the burner in
Section 10.6 of this manual before firing the
boiler.
Always adjust the fuel supply upwards from a
low position to ensure that a fuel rich mixture is
not achieved.
11.4.2 Gas fired Boilers
a.
Check that ignition electrode and rectification
probe are correctly positioned. See Fig. 11.2 below;
Figure 11.2 - Spark Gap and Electrode Positions
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