3. Start Up Instructions.
These appliances should be commissioned by a qualified mechanical contractor.
3.1 Tools
Required.
The following tools and equipment are advisable
to complete the tasks laid out in this manual.
Suitable alternative tools may be used.
Small Flat
Head
Screwdriver
Manometer
Phillips
Screwdriver
Leather
Faced
Gloves
5/32” (4mm)
Allen
Wrench
½” Wrench
Large Adjustable
Wrenches for fitting
Of Gas Flex.
3.2 Start Up procedure
Inspect installation and ensure that it has been
carried out in accordance with these
instructions. Remove burner and inspect the
electrode assemblies ensuring these are
securely fixed and that all electrical connections
securely made. Re-fit the burner ensuring that it
is correctly positioned and the screws are fully
tightened. Ensure that electrical and gas
supplies are isolated.
The gas supply should be purged and tested for
soundness in accordance with local and
National Safety Codes.
Open isolating gas valve and test gas
connections for soundness using soap solution.
Open the control housing door by unscrewing
the securing screw. Ensure all internal
components are securely fixed and that all
connections are securely made.
Open the manual gas valve outside the control
housing.
Switch on the electrical supply to start the
heater and observe the correct start up
sequence. Ensure that the settings of any time
switch and thermostat are such that the heating
system will be required to operate.
The fan will start to run and the ‘power on’ lamp
will illuminate. Safe-start checks are carried out
automatically. After the fan has run up to full
speed and a satisfactory pressure condition has
been established, the ignition sequence will
commence. The spark ignition will be energized
producing a spark at the ignition electrode. The
gas solenoid valve will at the same time be
energized and the ‘burner on’ lamp will
illuminate. If the ignition is successful the flame
is detected by the flame sensing probe and the
‘burner on’ lamp will remain on.
If ignition is unsuccessful the gas valve will close
and the spark ignition de-energized after
approximately 15 seconds. For approximately
30 seconds the fan will purge the system then
re-ignition will be attempted. After 2 further failed
attempts at ignition the control unit will ‘lock-out’,
the ‘power on’ lamp will remain illuminated and
the fan will run for 120 seconds and then stop.
To reset after ‘lockout’ switch off the power
supply to the system and wait 2 minutes. Turn
the power on. If repeated ‘lockout’ occurs
investigate the cause.
Set burner gas pressure as follows:
Switch off the power supply to the heating
system. Connect a ‘U’ tube manometer to the
pressure test point provided on the combination
gas control valve. Remove the cover from the
pressure regulator revealing the adjustable
screw. Start the heater and using a suitable
screwdriver adjust the pressure regulator,
turning the screw clockwise to increase the
pressure or counter-clockwise to decrease the
pressure. Set the pressure to appropriate inches
w.c. from the table of gas pressures for correct
heater description. Switch off the power supply
to the heating system. Disconnect ‘U’ tube
manometer, then securely replace screw in
pressure test nipple.
Check the operation of the flame safeguard
equipment as follows:
With the heater running normally, switch off the
gas supply at the shut off valve. The heater
should attempt to relight and if the gas valve has
been left off, ‘lock-out’ should occur. This is
indicated by the ‘power on’ lamp being
Multimeter
43