Grain Systems PNEG-1459 - Manual (Page 44)

44 PNEG-1459 L Series Operators
Before starting any repairs or maintenance on your dryer, observe the following safety steps:
1. Isolate the whole system from the electrical supply by switching off the power isolator and locking it.
2. Isolate the dryer from the gas supply by shutting off the main gas valve (if necessary lock the valve).
3. Keep the keys in your possession.
4. Augers and drives to augers may be under some degree of tension. Avoid touching these parts with your hands until you
are sure that they are free.
5. Do not reconnect the power supply until all work is completed and all guards are correctly refitted.
SEASONAL INSPECTION AND SERVICE
The dryer is made of weather resistant material, and is designed to require a minimum of service. However, each season we
recommend the following items be checked before the unit is used, and any damaged or questionable parts replaced. These
checks will help eliminate possible failures, and assure dependable operation of the equipment.
1. Shut off electrical power. Open power box and control box, and inspect for moisture, rodent damage or accumulated for-
eign material. Remove any foreign material present. Inspect and tighten any loose terminal connections. Replace any damaged
or deteriorated wiring.
2. Check blower for freedom of rotation. It should also be inspected for dirt and grain dust, ESPECIALLY BUILD-UP ON
THE WHEEL, as any additional weight can seriously affect the balance and result in harmful vibrations and a short bearing
life. Keep inside of the housing free of dirt build-up for efficient fan performance. Check that wheel hub screws are tight be-
fore start-up. Blower wheel should be rotated at least once a month to circulate the grease in the bearings. Inspect blower
drive belt for wear, alignment and proper belt tension. Tension belts as shown in blower drives chart on page 43.
3. MAKE SURE ALL MOTOR MOUNT BOLTS AND BLOWER BEARING BOLTS ARE TIGHT.
4. Auger motor bearings should be lubricated periodically, depending on operating conditions. Under normal usage it is de-
sirable to have the motor cleaned, checked and bearings repacked by an authorized service station every two to three seasons.
If the unit is operated continuously through most of the year, this service should be performed each year.
5. Remove and clean the gas line strainers. Make certain gas valves are closed and that gas is purged from the system before
attempting to disassemble anything.
6. Inspect the burner assembly for loose hardware and tighten as required.
7. Inspect ignitor plug and clean the electrodes. Use an ignition point file to remove carbon and rust between the electrode
surfaces. Ignitor gap should be about 1/4" (3 mm).
8. Inspect flame sensor for possible damage or poor connections. Flame sensor wires must be in good condition.
9. Inspect and manually rotate the top auger paddle assembly. The paddle unit must rotate freely without any indication of
sticking or binding.
10. Inspect the top auger and bottom auger drive lines for proper adjustment and condition. Readjust line tension as required.
11. Operate dryer clean out levers, and check clean out hatch mechanism for proper operation. With hatch open, inspect and
remove any accumulation of dirt, fines and foreign material from the bottom auger trough area.
Note: Do not allow high moisture material to collect within the trough area. It may adversely affect metal parts.
12. Inspect entire dryer for loose, worn or damaged parts. Include check of auger flighting, metering rolls and other internal
parts. Check that temperature sensors within air plenum chamber are secured within insulated clamps, and do not chafe on other
metal parts.
13. Make sure all dryer guards and warning decals are securely installed. Make certain guards do not interfere with moving
parts. If guards or warning decals are missing, contact your dealer for a free replacement.
14. Test fire the dryer several weeks ahead of the drying season. Check for possible gas leaks. See burner test fire section.
Note: If on site bearing lubrication is to be performed, see lubrication instructions for ball bearing motors. To keep
motor bearings properly lubricated, and dispel any accumulation of moisture within the windings, the fan and auger
motors should be operated for 15 to 30 minutes each month.
SERVICE