
Portable Dryer Troubleshooting
1
Table Of Contents
Safety..................................................................................................................................................................... 3
Safety Sign Off Sheet ............................................................................................................................................ 8
EMCS Portable Dryer (1993-1998)
Safety Voltage Check Points ................................................................................................................................. 9
Programming Instructions for EMCS Grain Dryers .............................................................................................. 10
EMCS Display Board ............................................................................................................................................ 11
Input/Output Board Identification .......................................................................................................................... 12
EMCS Switch Replacement.........................................................................................................................13
1100 Series Control Box Wiring .............................................................................................................................14
1100 Series Control Box Wiring (New) .................................................................................................................15
1200 Series Control Box Wiring............................................................................................................................. 16
1200 Series Control Box Wiring (New) .................................................................................................................17
1100 Fan Lower Control Box Interconnect Strip................................................................................................... 18
1200 Fan Lower Control Box Interconnect Strip .................................................................................................. 19
Upper Control Box External Wiring....................................................................................................................... 20
Fan Housing and Vapor Hi-Limit Circuit ...............................................................................................................21
Plenum Hi-Temperature Switch ............................................................................................................................ 22
FixedGrain Hi-Limit .............................................................................................................................................. 23
Grain & Plenum Hi-Limit Circuit ...........................................................................................................................24
Two Fan Plenum and Grain Limit Switch Wiring .................................................................................................. 25
Rear Discharge & Emergency Cooling Circuit .....................................................................................................26
Rear Discharge Mercury Switch...........................................................................................................................27
Adjustable Hi-Limit & Emergency Cooling Circuit ............................................................................................... 28
Motor Overloads ....................................................................................................................................................29
Air Pressure Switch............................................................................................................................................... 30
Air Pressure Switch Drawing................................................................................................................................ 31
Out of Grain Safety Circuit.................................................................................................................................... 32
Out of Grain Safety Circuit Drawing..................................................................................................................... 33
Upper Junction Box Wiring.................................................................................................................................... 34
Meter Roll Sensor .................................................................................................................................................. 35
Meter Roll Sensor Wiring ...................................................................................................................................... 36
Meter Roll Reversing............................................................................................................................................. 37
Lower Junction Box Wiring ................................................................................................................................... 38
New Fenwal Board Wiring.......................................................................................................................... 39
New Fenwal Board Troubleshooting.............................................................................................................40
Flame Control Circuit ............................................................................................................................................. 41
Fan Burner Circuit for Canadian Models .............................................................................................................. 42
Conversion Diagram for C Series Dryers to a Switchable Hi/Low or On/Off Burner .........................................43
Fan 28 LP Hi/Low-On/Off.................................................................................................................................... 44
Fan 28 LP On/Off Burner with Mercoid...............................................................................................................45
Fan 28 NG Hi/Low-On/Off ................................................................................................................................... 46
Fan 28 NG On/Off Burner with Mercoid .............................................................................................................. 47
Fan 42 LP Hi/Low-On/Off.................................................................................................................................... 48
Fan 42 LP On/Off Burner with Mercoid...............................................................................................................49
Fan 42 NG Hi/Low-On/Off ................................................................................................................................... 50
Fan 42 NG On/Off Burner with Mercoid .............................................................................................................. 51
SCR Drive Circuit.................................................................................................................................................. 52
RTD Temperature Sensor...................................................................................................................................... 53
Test Procedure for EMCS Dryers......................................................................................................................... 54
Temperature Charts ............................................................................................................................................... 55
EMCS Troubleshooting Tips........................................................................................................................ 56