Reznor, PVE, Installation Manual EN 2019-11, D301113 iss D Page 23
10.When adequate air flow for combustion
is proven by an air proving switch and a pre-
purge period has elapsed, the integral igniter
and multifunctional gas control operate. The
ignition spark ignites the gas creating the
burner flame.
11.Burner flame is sensed by a flame rod
sensor and when the heat exchanger
is warmed up (+/- 30 seconds) and the
fan control relay closes, the fan motor is
energized.
12.If the flame is extinguished during the
main burner operation, the integrated control
system closes the main valve and attempts
to relight the burner. The unit will attempt 5
ignitions before entering a “lock out” mode.
Lock out is indicated by the red warning light
on the heater. To end this mode on
the SmartCom3, press and release
the LOCKOUT button. After 10
seconds the controller will return to
normal operation. The lockout
warning and LED will continue to display
13.To turn the heater ‘OFF’ for short periods
adjust the SmartCom3 temperature to its
lowest setting or ‘OFF’. The fan will continue
to run to cool the heater and then switch off
automatically.
14.To turn the heater ‘OFF’ for long periods,
see ‘To turn off gas supply at the appliance’ in
the next section.
To turn off gas supply at the
appliance
1.Set SmartCom3 temperature to the lowest
possible setting or ‘OFF’ position.
2.Shut off the gas tap when the fan has
stopped.
3.Switch off electric power to the appliance
• Check gas pressure as described in detail
below.
• Turn the unit off and on, pausing 2
minutes between each cycle. Observe for
smooth ignition.
• Place this booklet and any control or
optional information in an accessible
location near the heater or give this
information to the end user.
Burner gas pressure
adjustment
The gas pressure is set for the required heat
input before the appliance leaves the factory.
Provided that the gas supply to the air heater
is in accordance with the supply pressure
described on the appliance data plate, the
operating pressure will not require adjustment.
To check the pressure use the following
procedure:
• Ascertain from the heater’s data plate the
correct operating gas pressure;
• Turn the SmartCom3 control to its lowest
setting;
• Remove the screw from the burner
pressure test point of the multi-functional
control valve. Connect a manometer to the
test point.
• Adjust the SmartCom3 to call for heat i.e.
above the room ambient temperature;
• Observe the burner gas pressure on the
manometer and compare to the required
pressure If necessary, adjust the burner
gas pressure. Remove the cover from the
regulator. Turn the regulator screw anti-
clockwise to decrease pressure or clockwise
to increase pressure.
• Set SmartCom3 to lowest setting to turn
OFF the burners. Replace the test point
screw/cap and with the main burner
OFF, test for gas soundness using a leak
detector fluid.
• Reset temperature control/SmartCom3 to a
comfortable operating level.
