Grain Systems PNEG-1702 - Manual (Page 86)

11. Service
86 PNEG-1702 ETL Listed GSI/FFI Portable Dryer Manual
Fan Motor Removal and Installation
In the event of motor failure, remove the motor as described and take it to the nearest service station. An
authorized service station is the only place that can provide possible motor warranty. Motor service and
repair at other places will be at owner’s expense.
If the service station determines motor failure is caused by faulty material or workmanship within the
warranty period, repair will be covered under the warranty. Motor failure caused by external sources will
result in a charge to the owner for repair.
1. Make certain 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 out of 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.