Baxi Potterton 33 HE Service Manual download pdf (Page 34)

11.0 Commissioning

11.1 Commissioning the Boiler

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. Open the mains water supply to the boiler.

4. Open all hot water taps to purge the DHW system.

5. Ensure that the filling loop is connected and open, then open

the heating flow and return valves on the boiler.

6. Open the screw on the automatic air vent on the pump body

(Fig. 59).

IMPORTANT: If the boiler is installed at a high point in the

system it is strongly recommended that Automatic Air Vent

Kit 720004701 is fitted.

7. The system must be flushed in accordance with BS 7593 (see

Section 6.2) and the flushing agent manufacturers instructions.

8. Pressurise the system to 1.5 bar (Fig. 60) then close and

disconnect the filling loop.

9. Turn the gas supply on and purge according to in GB BS 6891

and in IE I.S. 813 “Domestic Gas Installations”.

10. Test for gas tightness.

11. Hinge the facia panel upwards and refit the case front panel.

Tighten the securing screws.

12. 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:

13. The Combustion Check procedure as shown by the chart

in 11.2 is mandatory. The method of setting the boiler to

operate at maximum and minimum rates to comply with the

procedure is described below.

14. Ensure that all external controls are calling for heat. The

actual current boiler temperature is shown on the display.

15. Turn both control knobs fully anticlockwise, then quickly turn

the right hand knob 1/4 clockwise twice and back fully

anticlockwise.

16. The display will now alternate between ‘SF’ and the current

boiler temperature and both green LEDs will flash.

17. 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.

18. The display will show ‘00’, indicating maximum rate, then

revert to ‘P ‘ alternating with the current boiler temperature.

19. 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.

20. 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.

Pump

Automatic Air

Vent

Pressure Gauge

Screw

bar

Fig. 59

Selector Switch

Central Heating

Temperature Control

Domestic Hot Water

Temperature Control

Reset

bar

Pump

Fig. 61

Fig. 60

Display

1 2 ... 29 30 31 32 33 34 35 36 37 38 39 ... 59 60

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Baxi Potterton 33 HE Service Manual Page 34

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