ICI Caldaie RIO 140, Installation And Servicing Manual

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5 COMMISSIONING
19
Fig. 15
5 Maximum burner pressure in central heating mode
Note
: The maximum burner pressure in the central heating mode is adjusted by means of the
potentiometer (see Fig. 15) on the main driver board, the pressures given in section 1.2 can only be
achieved if the burner minimum and maximum pressures have been correctly set first on the gas valve.
To gain access to the main driver board - Remove the four screws securing the control box top cover.
Slide the cover back and up to remove it from the control box.
Press in the summer/winter switch (the green light indicates the switch is set to winter, i.e. heating and
hot water), the hot water temperature control to minimum and allow the boiler to run, to fully heat the
store. When the store is satisfied the boiler will change to the central heating mode and burner pressure
will increase to its maximum value as set by the potentiometer.
If the heating load is between the factory set output of 18.09 kW and the maximum of 28.40 kW the
burner pressure should be set to maximum.
If the heating load is between 12.21 kW and 18.09 kW set the burner pressure to the factory set pressure.
If the heating load is below 12.21 kW the burner pressure should be set to minimum.
6 Press in the on/off switch (green light off) to turn off the boiler. Disconnect the pressure gauge and tighten
the test point screw.
Press in the on/off switch (green light on) to light the boiler and test for gas soundness around the test
point screw.
7 Replace the control box cover, ensuring the front return edge is located under the front panel return, and
secure with four screws.
5.4 FINAL COMMISSIONING
1 Allow the heating system to heat up, then balance the system to achieve the necessary temperature
difference across the heating flow and return pipes at the boiler - see section 1.2.
2 Press in the on/off switch (green light off) and turn off the electricity supply to the boiler.
3 Drain the heating system, while it is still hot, as described in section 8 in order to complete the flushing
process.
4 Refill, vent and re-pressurise the system as described in section 4.2, adding a suitable inhibitor.
For further information concerning inhibitors contact ICI Caldaie (UK) Limited.
5.5 FINAL ASSEMBLY
1 If the boiler is to be left in service with the User, set the controls, timer (see Users Operating manual) and
room thermostat (if fitted) to the User's requirements then refer to section 6.
2 If the boiler is not to be handed over immediately, close the boiler gas service cock and switch off the
electricity supply.
If there is any possibility of the boiler being left during frost conditions, then the boiler and system should
be drained, refer to section 8.