32
LT5052 (ISS 5)
SECTION TEN Check Operation of Fire (installation instructions)
CHECK BURNER PRESSURE / GENERAL OPERATION
Remove the screw from the pressure test point on the burner inlet elbow and fit pressure gauge. Turn on gas to
the appliance. Ensure that the electricity supply is connected and switched. Press the switch marked on. The red
light at the base of the control unit will illuminate and the fan should operate at the high speed. After a short
period (up to 20 seconds) the light will extinguish, the fan speed will reduce and the fire can be lit. Purge the air
from the appliance by rotating the control to the ignition position; push in to allow the air in the pipe work to be
purged and the piezo to ignite the pilot. Check that the electrode is sparking at the gap between the
thermocouple tip and the electrode; continue until pilot ignition is established. Depress the control knob slightly
and rotate anti-clockwise until the index symbol is aligned with the
on the indicator label, release and allow
the appliance to run. Once the appliance has been lit, check the inlet pressure is 20 ± 1 mbar for natural gas
(G20), 37 ± 1 mbar for propane gas (G31).
If the red light does not illuminate on initial operation, or the fan does not run press the switch
marked OFF to reset the control and wait approximately 1 min. before attempting to relight the
fire.
CHECK FOR PRODUCT CLEARANCE
Check for satisfactory clearance of combustion products.
Close all doors and windows and leave fire burning for 5 minutes.
Then position a smoke match just into the top of the fire opening and move it left and right, all the smoke must
be drawn into the flue.
If spillage occurs, isolate the fire and seek expert advice.
If other open flued appliances are fitted within the premises, check that they continue to clear their products of
combustion when the fanned appliance is operating and inter-connecting doors are open.
FAN FAILURE TEST
To simulate the failure of the fan switch off the electrical supply whilst the fire is operating on high and check that
gas to the fire is shut off within 10seconds. If the gas supply is not shut off the fire must not be used until the fault is
corrected.
BLOCKED FLUE TEST
Light appliance in the normal way. Temporarily blank off the flue outlet. (For products fitted with the “Heat Saver”
check that the flap is opening fully when the fan is powered up then using a screwdriver close the flap firmly and
quickly and hold shut. Do not hold down the stainless steel reeds (flaps) at the sides of the main flap, as they will
easily be damaged. DO NOT hold closed for longer than absolutely necessary, and don’t hold partly open as damage
to the operating solenoid and wiring may occur under these adverse conditions.) Check that the gas to the appliance
is shut off within 15 seconds. If the gas supply is not shut off the fire must not be used until the fault is corrected.