Technical data

27
© Baxi Heating UK Ltd 2014
7.0 Completion & Commissioning
7.2 Commissioning the Boiler (cont.)
Checked:
That the boiler has been installed in accordance with these
instructions.
The integrity of the flue system and the flue seals, as
described in Section 6.2.
14. The Combustion Check procedure as shown by the chart
in 7.4 is mandatory from April 2014. The method of setting
the boiler to operate at maximum and minimum rates to
comply with the procedure is described below.
15. Ensure that all external controls are calling for heat. The
actual current boiler temperature is shown on the display.
16. Turn both control knobs fully anticlockwise, then quickly turn
the right hand knob 1/4 clockwise twice and back fully
anticlockwise.
17. The display will now alternate between ‘SF’ and the current
boiler temperature and both green LEDs will flash.
18. To set to maximum rate.
Turn the left hand knob fully clockwise. As the knob is turned
the display will change, indicating the fan speed.
19. The display will show ‘00’, indicating maximum rate, then
revert to ‘P ‘ alternating with the current boiler temperature.
20. To set to minimum rate.
Turn the left hand knob fully anti-clockwise. As the knob is
turned the display will change, indicating the fan speed. When
the display reads ‘ 0’ the boiler runs at minimum rate.
21. This function is maintained for 20 minutes unless the
maximum CH temperature is exceeded. The function can be
disabled at any time by turning the right hand knob.
7.3 Check the Operational Gas Inlet Pressure
1. Set the boiler to operate at maximum rate as described in
Section 7.2.18 to 7.2.19.
2. With the boiler operating in the maximum rate condition
check that the operational gas pressure at the inlet gas pressure
test point is 20mb (Fig. 47).
3. Ensure that this inlet pressure can be obtained with all other
gas appliances in the property working.
Measure the Gas Rate
4. With any other appliances & pilot lights turned OFF the gas
rate can be measured. It should be between 1.55 and 1.71m
3
/h.
5. Carefully read and complete all sections of the Benchmark
Commissioning Checklist at the rear of this publication that are
relevant to the boiler and installation. These details will be
required in the event of any warranty work. The publication
must be handed to the user for safe keeping and each
subsequent regular service visit recorded.
For IE, it is necessary to complete a “Declaration of
Conformity” to indicate compliance with I.S. 813. An example of
this is given in I.S. 813 “Domestic Gas Installations”. This is in
addition to the Benchmark Commissioning Checklist.
6. Disconnect the Boiler Control and fit the firefront in
accordance with the instructions supplied with it.
Inlet Gas Pressure
Test Point
Fig. 47
IMPORTANT: The combustion for this appliance has been
checked, adjusted and preset at the factory for operation
on the gas type specified on the appliance data plate. It is
still necessary to check combustion as part of
commissioning. Do not adjust the air/gas ratio valve.
IMPORTANT: The loose boiler serial number label
supplied in the boiler kit must be applied to an area of
the spacer frame that is visible to the end user e.g. lower
right hand side.
Fig. 47a