Reznor X - 8.6 Burner Carryover System and Air Adjustment; 8.6.2 Burner Air Adjustment; 9.0 Commissioning and Startup; 9.1 Check the installation prior to startup

Form I-X, P/N 150491 R7, Page 22
8.6.1 Burner Carryover
These duct furnaces have individually formed steel burners with accurately die-formed
ports to give controlled ame stability without lifting or ashback with either natural or
propane gas. The burners are lightweight and factory mounted in an assembly which
permits them to be removed as a unit for inspection or service.
All natural gas burners are equipped with two ash carryover systems that receive
a supply of gas simultaneously with the main burner. All propane gas burners are
equipped with one ash carryover and a regulated gas lighter tube system. During
regular service, check the main burner ports, the carryover assemblies, and the ori-
ces for cleanliness.
8.6.2 Burner Air
Adjustment
9.0 Commissioning
and Startup
9.1 Check the installation prior to startup
Check suspension. Unit must be secure and level.
 Be certain the electrical supply matches voltage rating of the furnace. (Refer to the
rating plate.)
Check clearances from combustibles. Requirements are shown in Paragraph 4.2.
Check vent system to be sure that it is installed according to the instructions in
Paragraph 6.2. Be sure that ue discharge openings are free from obstructions.
Check piping for leaks and proper gas line pressure. Bleed gas lines of trapped air.
See Paragraph 6.1.
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 10
seconds, turn gas supply off. No change in pressure should occur over a 3-minute
period.
e) If either c) or d) above indicate a leak, locate leak by brushing a soapy solution on
all ttings. Bubbles will appear at a leak. Repair and repeat tests.
NOTE: Prior to 8/2008, a
Model X unit could have an
intermittent spark system
without lockout, Option
AH2. Check the wiring
diagram on the furnace.
9.2 Startup
 Turn electric and gas supply on to the furnace. Adjust the thermostat or ductstat so
that a call for heat exists. Observe for complete sequencing of pilot and ignition.
Operating Sequence for Intermittent Spark Pilot System
1) Set the thermostat switch at its lowest setting.
2) Follow lighting instructions.
3) Set thermostat switch at desired setting.
8.6 Burner
Carryover
System and Air
Adjustment
8.0 Controls
(cont'd)
Burner air shutters are not normally required on natural gas furnaces. Air shutters are
required on propane gas units and may require adjustment.
Before making any adjustments to the air shutters, allow the heater to operate for
about fteen minutes with the air shutters open. The slotted screw on the end manifold
bracket moves the air shutters and adjusts all burners simultaneously. Turning the
screw clockwise opens the shutters; counterclockwise closes the shutters. After the
furnace has been in operation for 15 minutes, close the air shutters observing the ame
for yellow-tipping. Open the shutters until the yellow disappears. A limited amount of
yellow-tipping is permissible for liqueed petroleum gases. Natural gas should not dis-
play any yellow-tipping.
When making the adjustment, close the air shutters no more than is necessary to elimi-
nate the problem condition.
DANGER: Failure to install and/or adjust air shutters according
to directions could cause property damage, personal injury,
and or death.