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LDAP-IOM (01-22) 207733-A
MAINTENANCE—CONTINUED
Maintenance Procedures—Continued
Venter Motor and Wheel Assembly Maintenance
NOTES:
• Venter motor bearings are permanently lubricated.
• Keep all hardware removed to be used in reassembling and installing the replacement parts.
• Each heat section is equipped with a venter motor and wheel assembly.
• One venter motor and wheel assembly is located in the flue collection box section on unit sizes
800 and 1200.
Remove dirt and grease from the motor casing, venter housing, and venter wheel . Replace the venter motor and
wheel assembly as follows:
1 . Turn OFF gas and disconnect electric power .
2 . For heat section venter, remove burner/control compartment access panel .
3 . Disconnect three venter motor wires at DSI control, capacitor wires at capacitor, and ground screw (located on
control panel) .
4 . While holding venter motor, remove six screws that secure venter motor mounting plate to venter housing . Remove
motor and wheel assembly from heater .
5 . Reassemble with replacement venter motor and wheel assembly (see
, DETAIL A for heat section
, DETAIL B for flue collection box section venter .
6 . For flue collection box section venter motor and wheel assembly:
a . Do not use key provided with motor .
b . Locate setscrew on wheel approximately 180° from keyway in motor .
c . Torque setscrew to 125 (±5) inch-pounds .
7 . Reconnect venter wires in accordance with wiring diagram .
8 . Install access panel .
9 . Restore electric power to heater and turn ON gas .
10 . Follow instructions on lighting instruction plate to light heater .
11 . Check for proper heater operation .
Figure 21. Venter Motor and Wheel Assemblies
Assembled Venter
Motor and Wheel
7/16" (11 mm) inside
1-1/4” (32mm)
Spacing for Flue
Collection Venter
Motor and Wheel
Assembly
Wheel
Hex Nut
Flat
Washer
Screw
DETAIL A
DETAIL B
