SECTION 4
4-2
01/01/2014
B. DRYERS WITH TWO (2) OR MORE FANS ARE EQUIPPED WITH DELAY TIMERS, WHICH
ALLOW ONLY ONE(1) FAN TO START AT A TIME.
8.
TO START BURNER(S)
A. TURN "ON" FUEL SUPPLY TO DRYER.
1.
NATURAL GAS
- "OPEN" MANUAL VALVE.
2.
LP GAS
- OPEN AT SUPPLY TANK. OPEN QUICK ACTING VALVE AND BALL
VALVE ON DRYER.
DRYER MUST BE STARTED ON VAPOR UNTIL INTERNAL VAPORIZER IS WARM, THEN SWITCHED TO
LIQUID. TANK MUST HAVE BOTH VAPOR AND LIQUID DRAW AVAILABLE TO DRYER.
B. WHEN BURNER READY LIGHT COMES "ON", A 60 SECOND PURGE CYCLE HAS BEEN
COMPLETED.
C. MOVE BURNER SWITCH TO "ON" POSITION.
D. AFTER A SHORT DELAY, THE IGNITION FIRING LIGHT(S) WILL COME "ON" AND
THE GAS SAFETY VALVES ARE ENERGIZED. (IF EQUIPPED WITH A MANUAL MAXON
VALVE, THE HANDLE SHOULD ALWAYS BE BACK TOWARDS THE DRYER TO START.
WHEN ENERGIZED, PULL THE HANDLE FORWARD UNTIL ‘OPEN’ IS INDICATED.)
E. WITHIN A FEW SECONDS THE BURNER PROVEN LIGHT(S) WILL COME "ON" SHOWING
BURNER(S) HAVE PROVEN FLAME. AS BURNER PROVEN LIGHT(S) COME "ON" THE
IGNITION FIRING LIGHT(S) WILL GO "OFF".
F. ADJUST FUEL PRESSURE
1.
NATURAL GAS
- 8# TO 10# NORMAL - 20 # MAXIMUM
2.
LP GAS
- 10# TO 12# NORMAL - 20 # MAXIMUM
G. ADJUST PLENUM SET POINT FOR DESIRED OPERATING TEMPERATURE.
(SEE FIGURE 4-A FOR PLENUM TEMPERATURES FOR VARIOUS CROPS.)
1.
TO INCREASE HEAT
, USE THE “UP” ARROW KEY OF THE TEMPERATURE
CONTROLLER TO INCREASE THE SET POINT TO THE DESIRED OPERATING
TEMPERATURE.
2.
TO DECREASE HEAT
, USE THE “DOWN” ARROW KEY OF THE TEMPERATURE
CONTROLLER TO DECREASE THE SET POINT TO THE DESIRED OPERATING
TEMPERATURE.
H. WHEN TEMPERATURE HAS REACHED DESIRED SET POINT IN PLENUM CHAMBER AND
DRYER HAS HAD SUFFICIENT TIME TO WARM UP, "OPEN" LIQUID VALVE AT
PROPANE TANK AND SHUT "OFF" VAPOR SUPPLY.
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