Commissioning The Boiler - Baxi Combi 133 HE Plus Installation & Servicing Instructions Manual

Manual Air Vent
Fig. 32
Gas Valve
DO NOT check gas
pressure here
Inlet Gas Pressure Test
Point
© Baxi Heating UK Limited 2005
Automatic Air Vent
Fig. 34
10.0
10.1
NOTE: The information shown on the display is
explained on the label on the inside of the lower
door panel (see Fig. 38).
1. Open the cold feed to the boiler.
2. Open all hot water taps to purge the Domestic Hot
Water Circuit.
3. Ensure that the filling loop is connected and open, then
open the heating flow and return valves on the boiler
(see Section 10.4 Filling the System).
4. Open the manual and automatic air vents (Fig. 32)
(ensure all external controls are turned on and calling for
heat).
5. The system must be flushed in accordance with BS
7593 (see Section 6.1) and the flushing agent
manufacturers instructions, further guidance can be
obtained from BS 5449 Section 5.
6. Refill the system and add inhibitor following the
inhibitor manufacturer's instructions. Vent air as described
in Step 4.
7. 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.
8. Pressurise the system to 1.5 bar then close and
disconnect the filling loop.
9. Turn the gas supply on and purge according to in GB
BS 6891 and in IE IS 813 "Domestic Gas Installations".
10. Turn the gas service cock anticlockwise to the ON
position and check for gas soundness up to the gas valve.
11. Run the system and check the boiler for correct
operation.
NOTE: These boilers are self-regulating and the gas
rate will vary continously between maximum and
minimum modulation depending on the system or
DHW load. The maximum CH input is factory set
to 26.95kW. This can be increased to 33.7kW on
the 133 and 100 models - see section 10.2.
No adjustment of the gas valve is possible.
12. After a period of 3 minutes and with all the system
controls calling for heat, check the gas pressure at the
inlet tapping of the gas valve (Fig. 34) is greater than
14mbar and the gas rate is no greater than 4.2m
model) 3.1m
WARNING: The PCB Control and Fan
Assembly is 325 Vdc. Isolate at supply before
Expansion Vessel
access.
removed for clarity

Commissioning the Boiler

Commissioning the Boiler
3 /h (100 model) 2.5m 3 /h (80 model).
3 /h (133
31