Reznor LDAP Unit Installation Manual - Manual (Page 38)

Form I-LDAP, P/N 207733R6, Page 38
Flame Sensor
10.1.5 Heat Section
Venter Motor and
Wheel
Remove dirt and grease from the motor casing, the venter housing, and the
venter wheel. Venter motor bearings are permanently lubricated. Follow these
instructions for replacement of the venter motor and wheel assembly. Keep all
hardware removed to be used in re-assembling and installing the replacement
parts.
1. Turn off the gas and disconnect the electric power.
2. Open the burner/control compartment access panel.
3. Disconnect the three venter motor wires at the DSI control, capacitor wires
at the capacitor, and ground screw (located on the control panel).
4. Holding the venter motor, remove the six screws that attach the venter
motor mounting plate to the venter housing. Remove the motor and wheel
assembly from the heater.
5. Re-assemble with the replacement venter motor and wheel assembly. See
FIGURE 26.
6. Follow the wiring diagram to connect the venter wires.
7. Replace the access panel. Restore power to the heater and turn on the
gas. Light, following the instructions on the lighting instruction plate. Check
for proper operation.
FIGURE 26 - Venter
Wheel Position on
Shaft - applies to all
heat section venter
assemblies
7/16” (11mm) inside
Assembled Venter
Motor and Wheel
10.1.6 Main Venter Motor and Wheel (Models 800 and 1200 only)
The main venter motor and wheel is located on the top of the first heat section
of a Model LDAP 800 and 1200. The vent system attaches to the collar on the
top of the main venter housing.
Remove dirt and grease from the motor casing, the venter housing, and the
venter wheel. Venter motor bearings are permanently lubricated.
Follow the instructions in Paragraph 10.1.5 for replacement of the venter motor
and wheel assembly. Keep all hardware removed to be used in re-assembling
and installing the replacement parts. See FIGURE 27 for venter wheel and
motor spacing.
Main
Combustion
Air Pressure
Switch
Venter
Housing
Venter
Motor
FIGURE 27- Venter
Motor and Wheel
Spacing on Main
Venter (Sizes 800 and
1200)
NOTES:
1) Do not use key provided
with the motor.
2) Locate the set screw on
the wheel approximately
180° from keyway in motor.
3) Torque set screw to
125 ±5 in/lbs.
1-1/4” (32mm)
Spacing for Flue
Collection Venter
Motor and Wheel
Assembly
Wheel
Exhauster Motor Base
Hex Nut
Flat
Washer
Screw
Motor Wire and Cable Assy
10.0 Maintenance
and Service
(cont’d)
10.1 Maintenance Procedures (cont’d)
CAUTION: Due to high voltage on the spark wire and electrode,
do not touch when energized. See Hazard Levels, page 2.
Flame Sensor - Refer to FIGURE 22 and locate the flame sensor. Disconnect
the wire; remove the screw and the flame sensor. Clean with an emery cloth.
10.1.4 Ignition System (cont’d)