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20
COMMISSIONING
Manual No. 405/0101
4. COMMISSIONING - PAGE 20
4.1
BOILER CONTROLS
Refer to Fig. 28.
(Case and inner case front panel shown removed, expansion vessel and frame omitted for clarity).
Note:
Pilot position varies slightly between boiler models.
Fig. 28
4.2
PREPARE THE BOILER FOR COMMISSIONING
Refer to Fig. 28 for boiler controls.
1.
For a new boiler it will be necessary to fit the boiler thermostat control knob (supplied in the case pack). Place the
control knob in position on the spindle on the front of the control box.
2.
A test switch is provided on the top of the control box which will allow the boiler to operate during commissioning without
the programmer connected.
Before the case is fitted this switch must be set to the O (off) position if a programmer is used.
3.
Ensure the control box front is secured in position.
4.3
COMMISSION THE BOILER
1.
Test for gas soundness and purge the supply
a.
With the boiler service cock closed (the cock is closed when the operating spindle is turned fully clockwise [
]),
pressure test the gas supply and inlet pipework connection to the boiler service cock for soundness in accordance with
BS6891.
b.
Remove the gas inlet pressure test point screw. Ensure the gas supply is on and open the boiler service cock to purge
in accordance with BS6891. Replace the test point screw and test for gas soundness.