Reznor, AB - 2 Gas, GB 2019-08, D301177 Issue A PAGE 13
This appliance must be commissioned by a
suitably qualified engineer
Gas connection
Only persons suitably qualified to work on gas
fired appliances may carry out commissioning and
testing. The whole of the gas service installation
including the meter must be inspected, tested for
gas soundness, and purged in accordance with
the current rules in force.
WARNING: Never use a naked flame
for checking gas soundness.
Air curtain gas pipework
The gas soundness of the air heater pipework
has been checked prior to leaving the factory.
however during installation, connections may
have been loosened. Check the gas soundness
of the appliance pipework using suitable leak
detection fluid. If any leaks are found they must
be rectified immediately.
Check Vacuum Setting
Ensure that the gas and electrical supply to the
control panel is switched on. Ensure that the
control panel heat / cool selector switch is set to
the ‘cool’ position. The air curtain fans will now
start.
• Ensure that the control panel heat/cool selector
switch is now set to the ‘heat’ position. The air
curtain fans will now start and the burner will
fire automatically. Allow the air curtain to heat
up for 15 minutes.
Note: If the air curtain will not start on initial
start up, the ignition controller may be in
lockout position and require resetting. This
may occur especially if the appliance has
been on stand-by for a prolonged period.
Air Curtain Lighting Sequence
AB air curtains are fitted with automatic spark
ignition. When adequate airflow for combustion
is proven by an air proving switch, and a pre-
purge period has elapsed, the integral igniter and
gas control valve operate.
The ignition spark ignites the burner and the
flame is detected by a flame ionisation rod sensor.
If a burner flame is not detected after 5 attempts
then the ignition controller proceeds to lockout
and will require manually resetting. Lockout is
indicated by the illuminated burner rocker switch
on the burner housing, and by a lockout lamp
on the control panel, and can be reset either by
pressing the illuminated burner rocker switch or
the control panel lockout reset button.
Note: If the first lockout reset is not
successful, further investigation will be
required to ascertain the fault.
Burner gas pressure adjustment
The gas pressure is set for the required heat input
before the appliance leaves the factory, normally,
provided the gas supply to the air curtain is in
accordance with the supply pressure described
on the appliance data plate, the operating
pressure will not require adjustment. To check
the pressure, the following procedure should be
carried out:
• Ascertain from ‘Technical Specifications’
section of this document, and the appliance
data plate, the correct operating gas pressure
for the air curtain burner.
• T
urn the control panel cool/heat selector
switch to the ‘cool’ position.
Supply Pressure
Test Point
Burner
Pressure
Test
Point
Commissioning
Figure 16.
