Baxi Bahama 100 Installation And Servicing Instructions page 27

10.0 Commissioning the Boiler – page 27
10.3 Adjusting C.H. Setting Pressure
The appliance is preset to supply an output of 80,000 Btu/h
(23.45 kW) for central heating. If the system design requires
an output other than this, proceed as described below.
1. Fit a pressure test gauge to the burner pressure test
point (Fig. 39a).
2. Remove the rubber bung in the facia cover panel, and
identify the central heating pressure control
potentiometer (Fig. 39c & 39d).
3. Set the selector switch to the hot water and heating
position (Fig. 39b) and ensure that all external controls
are calling for heat. Set the heating temperature
adjustment knob to maximum.
4. Using a suitable screwdriver adjust the potentiometer
through the facia cover panel, to give the desired
pressure (Fig. 39d). See table below
Heating
100,000 output = 13.6mb
80,000 " = 8.7mb - units pre-set at this
70,000 " = 6.6mb
60,000 " = 4.9mb
50,000 " = 3.4mb
CAUTION: Care must be taken not to inadvertantly
touch any other components on the Control board.
5. Turn the appliance off, remove the pressure gauge and
refit the facia cover panel.
IMPORTANT: If the central heating system requirement
is 100,000 Btu/h (30kW) a second pump must be fitted on
the system return. This second pump MUST be wired to
the control board as shown in section 9.1