7. Service
PNEG-1456 1 and 2 Fan Vision Series Portable Dryers 45
1. Make sure power is shut off and locked out. Remove fan guard and blade.
2. Remove cover from fan/heater control box and disconnect the motor lead wires from within the box.
NOTE: Tag or otherwise identify wires for ease of reassembly.
3. Remove motor mount bolts. If there are shims between the motor and its base, note their location,
so they can be properly installed during reassembly.
4. Disconnect the upper end of the motor conduit, then carefully pull the wires through the hole in the
fan/heater housing. Remove motor from the fan/heater unit with the conduit still attached. If motor
requires service, take it to an authorized service station.
5. To reinstall motor, slide onto motor base plate and replace shims (if required) between motor base
and plate. Reinstall motor mount bolts and washers, but do not fully tighten at this time.
6. Reinstall conduit and wires through hole in fan/heater housing and carefully connect all electrical wiring.
7. Adjust position of motor by temporarily mounting the fan blade on the motor shaft. Rotate the fan
blade by hand, making the necessary adjustments so the tip clearance between blade and housing
is uniform. If required, remove the fan blade and fully tighten all four (4) motor mount bolts.
NOTE: Make sure to install and tighten the blade in accordance with previous instructions.
Heater Parts Removal and Installation
Most of the heater parts can be removed by simply identifying any attached wiring and then disconnecting
the obvious mounting parts.
1. Flame Sensor: Disconnect the wire connector and unscrew the flame sensor from its
mounting bracket.
2. Gas Solenoid Valve Coil(s): Unsnap either the plastic cap or the metal clip on the gas valve and
slide the housing and coil off the valve stem and body. Do not energize the coil when it is removed,
as the coil may become damaged due to excessive current flow.
3. Regulator and Gas Solenoid Valve(s): The gas regulator and solenoid valve(s) are directional and
must be connected as indicated by the markings near the port openings. Make sure gas is shut off
and purged from the system before removing parts.
NOTE: When installing a liquid gas solenoid valve on LP models, do not over tighten the connection
into the inlet side, as the inlet orifice may become partially blocked.
4. Main Gas Orifice: With fuel shut off and gas purged from system, proceed as follows:
a. Disconnect the plumbing support brackets from the pipe train.
b. Disconnect gas solenoid valve coils. Be sure to mark their original locations.
c. Lift pipe (with orifice, solenoid valve and other parts attached), straight up and remove from
fan/heater housing. Orifice and other parts can now be removed from pipe train, if desired.
5. Reassemble: To reassemble parts, reverse the disassembly procedure and check the following:
a. Make sure all parts are thoroughly cleaned and open.
b. Use a dependable brand of high temperature pipe caulking compound when assembling gas
connections. Apply only a light coating onto male threaded end of fittings.
c. Solenoid valves and gas regulations are directional and must be properly installed. Do not attempt
to connect gas solenoid valves by applying force to the valve core stem as it may ruin the unit.
d. Make sure all electrical wires are properly connected. Refer to wiring diagrams on Pages 39
and 40.
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