Grain Systems PNEG-588-04 - Manual (Page 29)

PNEG-588-04 Deluxe Downwind Heater Installation and Operation 29
7. Service
Seasonal Inspection and Service
All parts are made of weather-proof construction and are designed to require a minimum of service;
however, we recommend the following items be checked and serviced, as described, before the unit is
used each season. Replace any damaged or questionable parts.
THESE CHECKS WILL HELP ELIMINATE POSSIBLE MINOR FAULTS AND ASSURE DEPENDABLE
OPERATION OF THE EQUIPMENT WHEN IT IS NEEDED.
1. Check fan and service it as described within the fan installation and operation manual.
2. Shut off electrical power. Remove heater control box cover and inspect for moisture, rodent damage
or accumulated foreign material remove any foreign material present. INSPECT AND TIGHTEN ALL
LOOSE TERMINAL CONNECTIONS. Replace any damaged or deteriorated wiring.
3. Shut off fuel and remove and clean gas line strainer.
4. Remove the orifice from the burner venturi and inspect for obstructions. Also, inspect and clean out
the burner venturi and the ports within the burner cup. Blow out with compressed air or disassemble
and thoroughly clean these parts. Foreign material in the venturi or burner cup will impair heater
operation and cannot be expected to burn out when the heater is started.
5. Inspect and clean the electrodes on the ignitor plug. Use an ignition point file to remove carbon and
rust between the electrode surfaces.
6. Inspect flame rod and ignitor plug wires for possible damage or poor connections.
7. After completing all checks and performing any necessary service, check the control device, as
described under the following appropriate heading.
Heaters Equipped with a Humidistat Control
Temporarily remove humidistat control from air plenum chamber of bin. Rotate the knob through the
20% to 80% humidity range. The switch within the humidistat should produce a small “click” when the lever
passes the point of prevailing humidity.
NOTE: For additional information, refer to instructions that accompanied the humidistat.
Heaters Equipped with a Thermostat Control
Slowly rotate the thermostat dial through its temperature range. The switch within the thermostat should
produce a small “click” when the dial passes the point of prevailing temperature. Set the dial to a setting
at least 10°F above the prevailing temperature and proceed to the next step.
8. Test operate the fan and heater. Make sure to follow operating instructions, INCLUDING. After fan
starts operating and the heater purge interval has elapsed (approximately 20 seconds delay), the
heater should come ON and start operating.
9. Slowly change the humidistat or thermostat setting and cycle the heater OFF and ON to make sure
the device is controlling the heater and is operating properly.