4
7.
Thermostat: Locate the Thermostat about four feet above the floor, at least a foot from windows, four feet from
doors and preferably on an inside wall. Run two conductor wire from furnace to thermostat use a thermostat
suitable for 12V.D.C.
8.
Replace the Junction box cover and secure with screw,
CAUTION
:
Do not short any leads to ground. Any
shorting or arcing may damage furnace components and thermostat.
9. Vent Installation: Select the vent kit required for your overall installed cabinet and wall depth. (A minimum of 1
1/4” overlap is required on all telescoping exhaust tubes.)
Cabinet Depth
Vent Kit
20 5/8 to 23 3/4.
D-24
23 3/4 to 28 5/8
D-28
28 5/8 to 32
D-32
A. Apply mastic or sealant to back of air tube flange (B) slide through outside wall cut out and into furnace air
channel.
B. Apply mastic or Sealant to back outer edge of vent grill
(Do not plug holes)
. Slide assembly in over furnace
exhaust tube, push into wall and secure with two screws.
10. Mounting: A. Secure furnace to compartment floor with two screws through holes in control box flange.
IMPORTANT
: To assure sufficient return air to the circulating blower, maintain specified clearances.
B. Install self trim door by sliding door flange over casing top flange and pushing in on bottom of door.
OPERATING INSTRUCTIONS
FA-79 “D” Models have direct spark ignition systems conforming to A.N.S. Z2120 standards, There is no pilot light.
To place furnace in operation:
1. Turn gas valve to 'on' position (NOTE: Some models may be equipped with a gas valve that does not have a gas
control knob).
2. Set thermostat to Lowest temperature setting, then to desired temperature (if thermostat has an "off" switch turn to
"on").
NOTE
: On initial lighting, the burner may not ignite due to air in the gas lines. Repeat step two as necessary until
burner ignites.
FA-79 “P” Models have piezo ignition systems with pilot burners.
To place furnace in operation:
1. Turn gas valve to "off" position and thermostat to highest setting. Wait five minutes.
2. Turn gas valve knob to 'pilot" position.
3. Depress gas valve knob and light pilot by depressing igniter. Several strokes may be required if there is air in the
gas lines.
4. Hold the knob in for about 30 seconds or until pilot remains burning when the knob is released.
5. Turn the gas valve knob to “ON” position and set thermostat to desired temperature.
NOTE
: FAN SHOULD BE IN OPERATION WHEN TURNING GAS VALVE TO “ON” POSITION.
For Complete Shut Down - All Models
1. Turn gas valve knob to "off" position (on units with knob)
2. Set thermostat to lowest setting and/or 'off'
PREVENTIVE MAINTENANCE
1. Glean complete furnace and air box passageways periodically to remove dust, lint, etc.
2. Check gas system for leaks at least once a year.
3. Check and clean blower wheel annually,
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