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4 COMMISSIONING AND HANDOVER
4.1 Commissioning the Appliance:
With all the pipe connections made, open the cold supply water valve on the filling loop and the CH flow and return
valves at the base of the appliance. Open the manual vent at the top of the appliance and bleed, close the manual
vent when all the air is removed.
Ensure that all isolating valves are open and that the system is pressurised to the correct level.
Having tested for gas soundness, purge air from the gas supply and turn on the gas service cock.
Ensure the domestic cold water system, all system radiators and the boiler, have been bled using the manual vent at
the top of the appliance.
Switch on the electricity supply to the appliance. Turn ON the ON/OFF switch on the boiler control panel and turn the
central heating (P1) control to minimum.
The LCD display will become active, whilst the microprocessor control completes a number of checks and sets the
appliance to a standby position.
The display will indicate the system pressure in the lower RH corner of the LCD panel and a numerical display in the
upper and lower LH side of the LCD panel.
Check that any external controls are calling for heat, and turn the CH temperature knob (P1) clockwise. The set point
temperature will be displayed on the LCD screen, set it to 60
o
. The fan will start and the ignition sequence will take
place. The display will indicate the burner is on as well as an indication of fan speed. A stylised flame will be dis-
played when the flame is established.
If ignition does not take place during the first ignition attempt, there will be a further 2 attempts. If the burner has still
not lit, a fault code will be displayed and this may be due to air being present in the gas supply. Pressing the reset
button will initiate a second sequence of ignition attempts.
When the boiler lights, allow the appliance to operate at low temperature and vent all the air from the boiler and sys-
tem. If necessary, re-pressurise the system to between 1.1 and 1.5 bar.
Turn OFF the appliance by turning the control knob (P1) to the OFF position.
When the above checks have been completed, a combustion performance test (as detailed in the SERVICING section)
can be carried out if required.
4.2 Handing over:
After completion of the commissioning procedure, the installer should hand the appliance over to the occupier of the
house by the following procedure:
•
Hand the User Instructions (ZZ1187) to the occupier and explain their responsibilities in respect of current legisla-
tion and regulations, both national and local.
•
Explain and demonstrate how to light and shut down the appliance.
•
In order to gain the best possible fuel economy in relation to the heating and hot water requirements of the house-
hold, carefully explain the operation of the appliance and the use/adjustment of all the system controls.
•
Advise on the precautions required to prevent damage to the appliance; the system and the building in the event
of the appliance being shut down in very cold weather.
•
Explain how to control the temperature of the radiators by use of the controls on the appliance.
