Reznor SCE Unit Installation Manual - Manual (Page 30)

Form RZ-NA I-SCE, Page 30
FIGURE 30 -
Propane Gas
Burner Rack
Showing Burner Air
Shutter Adjustment
Screw
Burner Air
Shutter
Adjustment
Screw
† Verify suspension/mounting methods and clearances. See Paragraphs 5 and 6.
† Verify that the bolts removed from the shipping clips were returned to the heater cabinet.
See Paragraph 4.
† Check duct connections. See Paragraph 8.
† Check venting. See Paragraph 9. Be sure that flue discharge and combustion air openings
are free of obstructions.
† Be sure electrical entrance and gas supply pipe openings are sealed.
† Be sure that all condensate drains are open. See Paragraph 7.
Electrical Checks:
† Be certain the electrical supply matches voltage rating of the furnace. (See rating plate.)
† Check all field wiring against the wiring diagram. Be sure that wire gauges are as required
for the electrical load.
† Check that fuses or circuit breakers are in place and sized correctly.
Gas Supply Checks:
† Check piping for leaks and proper gas line pressure. Bleed gas lines of trapped air. See
Paragraph 10.
a) Turn manual shutoff valve to off position.
b) Turn gas supply on.
c) Observe gas meter for movement, or
d) Attach pressure gauge readable to .1" w.c. and after turning gas on for ten seconds,
turn gas supply off. No change in pressure should occur over a three-minute period.
e) If either c) or d) above indicate a leak, locate leak by brushing a soapy solution on
all fittings. Bubbles will appear at a leak. Repair and repeat tests.
Blower Checks:
† Check blower pulley and motor pulley to be sure they are secure to the shafts. Check belt
tension and alignment. See Paragraph 17.
† Check the rotation of the blower. See Paragraph 17.
† Verify the removal of all shipping supports. See Paragraph 4.
† Check damper linkage. See Paragraph 26.
25. Check
Installation
and Startup
Check the
installation prior to
startup
23. Burner
Orifices
(cont'd)
24. Burner Air
Shutters
Air shutters are required on propane units, optional on natural units. A slotted screw on the end
of the manifold bracket moves air shutters and adjusts all burners simultaneously (See FIGURE
30). Turning the screw clockwise opens the air shutter; counterclockwise closes shutter.
After the furnace has been in operation for 15 minutes, close air shutter until the flame turns
yellow. Open shutter until yellow disappears.
125 150 175 200 225 250 300 350 400
Burner Orifices Qty 5 7 7 9 9 12 12 14 16
Drill Size #42 #44 #42 #43 #42 #44 #42 #42 #42
P/N 84437 11833 84437 11828 84437 11833 84437 84437 84437
Drill Size 1.45 mm #55 1.45 mm #55 1.45 mm #55 1.45 mm 1.45 mm 1.45 mm
P/N 61652 11830 61652 11830 61652 11830 61652 61652 61652
Carryover Orifice Drill Size #70 #65 #65 #65 #65 #59 #59 #56 #56
Propane Gas P/N 9870 9680 9680 9680 9680 10370 10370 9791 9791
Model SCE Size
Natural Gas
Propane Gas
DANGER: Failure to
adjust air shutters
according to directions
could cause property
damage, personal
injury, and or death.
Startup
† Close all panels tightly. Turn electric and gas supply on to the furnace. Adjust the thermo-
stat or ductstat so that a call for heat exists. Observe for complete sequencing of safety
pilot and ignition.