Initial Lighting - gledhill GC2000/120/E-OV Design, Installation & Servicing Instructions

5. INITIAL LIGHTING

Check that the electricity supply is ISOLATED and the selection knob (fascia panel) is
set to 'Normal Gas Operation' . Ensure that the boiler and system are full of water by
checking the vent points on the boiler and the system charge pressure.
Turn on the gas supply and open the gas service cock to purge air from the gas line
in accordance with the current issue of BS 6891.
Turn off the gas supply at the appliance and undertake a dry run to lockout as
follows:-
Check that all manually reset thermostats have been reset and are not open
circuit.
The appliance PCB (figure 23) indicates the operation of the system which must be
checked and initialised as follows:
1. Switch off heating on the clock/programmer and room thermostat.
2. Switch off hot water on the programmer if 2 channel remote clock is fitted.
3. Check the jumper settings are correct. These must all be in the correct
positions for the appliance to work correctly see figure 23 below for
details.
4. Switch on the mains supply. The A.C.B. will automatically commission itself
and the dot after the
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Figure 23
COMMISSIONING
The control system is now initialised. The
operation of the controls can now be
checked.
1. Horizontal LED BAR 2 'ST' will be lit.
Boiler, boiler pump and boiler fan will be
running and green LED's 1,
4 on the PCB will be switched on.
Note: The controls within the PCB will not
allow the heating system to function until the
store temperature has reached 64°C. Therefore
although the LED bar 1 'HT' will light when
heating is switched on, the heating pump
(Green LED -3) will not switch on if the store
temperature is less than 60°C. Time will need
to be allowed for this to happen during initial
commissioning.
Check that the appliance circulation pump
is circulating water through the boiler and
store.
The boiler 'Normal Gas Operation' indicator
light should illuminate (green) and the fan will
start running.
After a few seconds the solenoid valve will
open the intermittent spark will commence
but as the gas is turned off the full sequential
control system will then go to lockout and the
red lockout indicator light will be illuminated
(Figures 13 & 14). Turn off the external electrical
supply. Carry out the ignition sequence with
live gas ONLY if the safety system has operated
correctly.
Turn on the gas supply at the appliance. Switch
on the external electrical supply.
Reset the switch on the control panel (Figures
13 & 14) before the fan should run - followed
by the gas solenoid opening. The spark ignitor
should ignite the burner (visible through the
site glass) and the burner should remain at
low rate for around 30 seconds. Also burner
on indicator light in yellow will illuminate on
front panel. The burner should then increase
to maximum (high) rate. This is signalled by a
noticeable increase in fan speed and burner
flame size.
The remaining system functions can now be
checked.
2. Once a temperature of 64°C has been
reached on the thermal store, switch on
space heating clock/programmer and
room thermostat.
• Horizontal LED bar 1 'HT' will light.
• Green LED 3 on the A.C.B will switch on.
Heating pump will run.
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