12.0 Commissioning the Boiler
38
© Baxi Heating UK Ltd 2014
Low
High
Reset
ON
IN
OUT
Gas Service
Cock
Flow Temperature
Adjustment Screw
Fig. 34
Fig. 35
Fig. 36
Open
Inlet Gas Pressure Test Point
DO NOT
check gas pressure here
12.1
Commissioning the Boiler
WARNING: The PCB Control and Fan
Assembly are 325 Vdc. Isolate at supply
before access.
1. Reference should be made to BS:EN 12828 & 14336
when commissioning the boiler.
2. At the time of commissioning, complete all relevant
sections of the Benchmark Checklist at the rear of this
publications.
3. Flush the whole system using a suitable flushing agent
(see Section 6.2) and vent the radiators. Check for water
leaks.
4. Refill the system with inhibitor following the inhibitor
manufacturer’s instructions and BS 7593 Code of Practice
for Treatment of Water in Domestic Hot Water Central
Heating Systems (see Section 6.2).
5. Complete the label supplied with the inhibitor and
attach to the inside of the boiler case. Detail of system
treatment should be added for future reference.
6. Turn the gas supply on and purge according to in GB
BS 6891 and in IE I.S. 813 “Domestic Gas Installations”.
7. Remove the top RH securing screw and hinge down
the PCB housing to gain access to the gas service cock
(see Fig. 32). Turn the gas service cock anticlockwise to
the ON position and check for gas tightness up to the gas
valve (Fig. 34).
NOTE: The 12,15,18 & 24 are self-regulating
dependent upon the system load. The 30 will
modulate between inputs of 33.76kW and 10.3kW.
The 30 input is factory set at 24.5kW and can be
altered to 33.76kW - see section 10.8.
No
adjustment of the gas valve is permissible.
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.
8. 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.
