28
11.0 Commissioning
© Baxi Heating UK Ltd 2012
10.0 Commissioning
Automatic Air
Vent
Cap
Fig. 37
Pump
bar
0
1
2
3
4
Control Box
removed for clarity
Fig. 38
Fig. 39
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. No
measurement of the combustion is necessary. Do not
adjust the air/gas ratio valve.
During the Gas Type Check Function the combustion
ratio will increase for a short time while the gas type is
established.
10.1
Commissioning the Boiler
1. Reference should be made to BS:EN 12828, 12831 & 14336
when commissioning the boiler. Ensure that the trap has been
primed - see Section 9.5 paragraph 3.
2. At the time of commissioning, complete all relevant sections of
the Benchmark Checklist at the rear of this publication.
3. Open the mains water supply to the boiler and all hot water
taps to purge the DHW system.
4. Ensure that the filling loop is connected and open, then open the
heating flow and return valves on the boiler. Ensure that the cap on
the automatic air vent on the pump body is opened (Fig. 37).
5. The system must be flushed in accordance with BS 7593 (see
Section 6.2) and the flushing agent manufacturers instructions.
6. Pressurise the system to 1.5 bar (Fig. 38) then close and
disconnect the filling loop.
7. Test for gas tightness, turn the gas supply on and purge
according to in GB BS 6891 and in IE I.S. 813 "Domestic Gas
Installations".
De-Aeration Function
8. When power is supplied to the boiler for the first time the
software pressure will be displayed. followed by . However
if is shown, press for 2 to 4 seconds . will now
be displayed.
9. Press & together and hold for at least 6 seconds.
The ‘De-Aeration’ Function will be activated and
‘On’
displayed.
10. The boiler pump will run for up to 10 minutes during which
time the diverter valve will switch between heating & hot water.
This will purge air from the system. The display will show .
Gas Type Check
11. Once de-aeration is complete the boiler will go automatically
to first fire-up and run at the Ignition Phase fan speed for 3 or 4
minutes to check the gas type (N.G. or Propane L.P.G.). The boiler
software checks the combustion value against the set value.
will be displayed, alternating with a figure representing the
Ignition Phase speed, e.g.
‘33’
or
‘43’
(
Note:
Each boiler model
will display a different figure).
12. The boiler is factory set for Natural Gas. On a Natural Gas
Supply will be displayed and the boiler is ready for the Inlet
Pressure & Gas Rate to be checked (Section 10.2).
13. IMPORTANT: In cases where the supplied gas is Propane
gas will be displayed. Press for at least 6 seconds to
confirm that this is the intended gas type for the installation.
14. IF THE BOILER IS TO BE OPERATED ON PROPANE A
SUITABLE PERMANENT MARKER PEN MUST BE USED TO
ALTER THE ‘GAS SETTING INFORMATION’ LABEL ADJACENT
TO THE DATA LABEL !
15. Having checked:
• That the boiler has been installed in accordance with
these instructions.
• The integrity of the flue system and the flue seals.
• The integrity of the boiler combustion circuit and the
relevant seals.
Proceed to put the boiler into operation as follows:
Display showing Gas
Type Recognition
R
Heating
Pressure Gauge
FUNCTION INTERRUPTION
If either De-aeration or Gas Check is interrupted by a fault
e.g. low water pressure (E118) or air in the gas supply
(E128 or E133) the fault must be rectified and the function
reactivated. During De-aeration, if water pressure is lost,
repressurising to 1.0 bar will allow the function to
continue. Whilst the Gas Type Check is being performed if
water pressure is lost the function can be reactivated by
repressurising then pressing & together and
holding for at least 6 seconds. If a gas supply fault occurs
must be pressed before & .
R
