Installation and Operation Manual

Form #43219020
Sept 2012
This heater requires ventilation in the building to dilute the products of combustion and provide fresh air for
efficient combustion. Power ventilation is recommended and the minimum vent flow required is as follows:
SG3
140 cfm
SG10
400 cfm
SG4
160 cfm
SG12
480 cfm
SG6
280 cfm
SG13, SG14
560 cfm
SG8
320 cfm
SG15
640 cfm
If gravity ventilation is used, the required square feet of inlet and outlet vent area (depending on height and temperature
difference) is as follows:
SG3
0.49 s/f
SG10
1.48 s/f
SG4
0.57 s/f
SG12
1.72 s/f
SG6
0.98 s/f
SG13, SG14
1.97 s/f
SG8
0.98 s/f
SG15
2.30 s/f
The General Ventilation Rules outlined in ASHRAE GUIDE AND DATA BOOK should be observed when locating
vents. Exhaust vents must be located at the highest point above and in the vicinity of the heaters and the
inlet vents must be located below the level of the heaters. Inlet openings in the building should be well
distributed high in the sidewalls and should direct incoming air upward to dilute products of combustion
while preventing drafts at lower levels. Inlets are typically 1 to 3 sq. ft. Local codes may require that
mechanical exhaust systems be interlocked with thermostats to function simultaneously.
12) LIGHTING AND SHUTDOWN INSTRUCTIONS
DIRECT SPARK IGNITION SYSTEM (Ignition Suffix “5”)
1. Turn on the gas supply.
2. Set the thermostat to call for heat.
3. Ignition should occur immediately.
4. If the burner fails to light, or flame is not detected during the first trial for ignition (a period of
approximately 10 seconds) the gas valve is de-energized and the control goes through an interpurge
delay of approximately 15 seconds before another ignition attempt. The control will attempt two
additional ignition trials before going to lockout, and the valve will be de-energized immediately.
5. If the heater does not light, shut off the gas completely for 5 minutes before attempting to relight.
6. CAUTION: The heater must be grounded. Poor grounding will give nuisance lockouts, particularly during
momentary power interruptions.
7. To shut down the heater, turn off the gas and the electrical supply.
NOTE: The lighting and shutdown instructions are also shown on the permanent nameplate attached to the
heater.
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