19
I-RIH (05-21) 131793-A
OPERATION
Pre-Startup Checklist
Ensure that electrical supply matches voltage of unit .
Check for proper grounding and polarity of the ignition system . The direct spark ignition system cannot determine
the presence of flame and will lockout and shut off if it is not electrically grounded to the burner .
Ensure that all clearances to combustibles are maintained .
Check the location of sprinkler heads—high temperature heads may be required .
Space directly below the heater should be free of objects that may overheat or prevent infrared energy from
reaching desired area .
Post signs indicating maximum stacking height under or near heater .
Heater may be angle-mounted only as specified .
Ensure that heater is level and is suspended in accordance with
section .
Ensure that there are no gas or electric lines above or below the heater .
Adequate ventilation MUST be provided .
Gas piping and supply must meet requirements .
Ensure that all air has been purged from the gas supply line .
Complete the installation record on the back page of this manual .
Keep this manual for future reference .
Startup
⚠ CAUTION ⚠
IMPORTANT: The control system cannot determine the presence of flame and the control system
will lockout and shut off if it is not electrically grounded to the burner. The control is extremely
polarity sensitive. Proper grounding and proper electrical polarity are essential to the operation
of these heaters.
Light the heater as folows:
1 . Turn manual gas valve to OFF position .
2 . Turn electrical supply OFF .
3 . Wait at least 5 minutes and then set thermostat above room temperature .
4 . Turn manual gas valve to ON position .
5 . Turn electrical supply ON .
6 . Set thermostat to desired temperature .
7 . If heater does not light, repeat steps 1 through 6 .
Sequence of Operation
1 . Thermostat calls for heat—on two-stage models, low-heat or high-heat operation is determined by thermostat
setpoints—refer to thermostat manufacturer’s instructions .
2 . Power is applied to the Ignition Detection Control (IDC)—15 seconds after power is applied, a spark is developed
at the electrodes and the combination gas valve opens for a 15-second trial-for-ignition period .
3 . Burner ignites—a small DC electrical current begins flowing from the sensing electrode through flame to ground .
4 . The controller senses current and turns OFF spark—gas continues to flow through the combination gas valve—
sparking may continue for the full 15 seconds before stopping .
a . If the burner fail to light or if flame is not detected during the first trial-for-ignition period, the combination gas
valve is de-energized and the controller starts the 15-second inter-purge sequence before another ignition trial .
b . After 15 seconds, the controller begins two (2) more ignition trials .
c . If the burner fails to light after the third trial, the controller will de-energize the gas valve and go into lockout mode .
