Series 2000 dryer control panel, Special features, Safety circuit shutdown messages – Grain Systems PNEG-573 User Manual

Page 21

SERIES 2000 DRYER CONTROL PANEL

The air switch

air switch

air switch contacts have closed

prior to the fan

fan

fan starting, indicating a

freewheeling blade

blade

blade or improper set-

ting of the air switch

air switch

air switch.

An over temperature condition has
occurred in one of the grain col-

grain col-

umns

umns causing the control to shut-
down the dryer. This control is set

The temperature high limit

temperature high limit

temperature high limit located

on the fan/burner housing

fan/burner housing

fan/burner housing has

HOUSING HIGH

TEMPERATURE

The contacts in the air switch

air switch

air switch have

opened due to insufficient airflow for the
burner

burner

burner to operate, the fan

fan

fan not turning,

or the air switch

air switch

air switch may need adjusting.

OUT OF GRAIN

NO AIRFLOW

An over temperature condition has
occurred inside the dryer plenum

dryer plenum

dryer plenum.

This control is a 300

F limit and auto-

matically resets itself when cool. See
emergency cooling mode above.

PLENUM HIGH

TEMPERATURE

AIR

at 210

F and automatically resets

itself when cool.

One of the thermal overloads

thermal overloads

thermal overloads on ei-

ther the fan, load, unload

fan, load, unload

fan, load, unload or auxil-

auxil-

iary motors

iary motors has opened, indicating
an overcurrent condition. The over-

over-

loads

loads must be manually reset.

REAR DISCHARGE

WARNING

EMERGENCY COOLING

MODE

you can run the fan

fan

fan to help cool the

grain and/or plenum high limit back
down to a safe level. After changing
the switch press the START button
and only the fan

fan

fan will run for approxi-

mately five minutes.

By moving the third switch (num-

ber six) on the dip switch located in-
side the control box

control box

control box on the back of

the computer control board

computer control board

computer control board, the

burner can be changed from a HI-LO
burner

burner

burner to an ON/OFF burner

burner

burner opera-

tion. The burner

burner

burner will operate exactly

the same as the HI-LO burner

burner

burner, how-

ever, when the set point is reached
the burner

burner

burner is cycled off instead of go-

ing to a lower pressure. The vapor-
izer cools quicker and allows a closer
tolerance on the set point.

The need has developed for an ON/
OFF burner

burner

burner in recent years, due to

changing fuel conditions, and also
to aid in drying wheat or other low
temperature grains in hot weather.

An emergency cooling mode can be
entered by switching the next to the
top switch (number seven) on the dip
switch located inside the control

control

box

box on the back of the computer

computer

control board

control board. This will enable a
mode, allowing the operator to run
the dryer fan

fan

fan only, in the case there

is a plenum temperature or grain
high limit warning. When either of
these safeties shuts down the dryer,

BURNER ON/OFF

OPERATION

SPECIAL FEATURES

The LP gas vapor temperature

temperature

sensor

sensor located in the gas pipe

gas pipe

train

train downstream from the vapor-
izer, has opened indicating that the
vaporizor is running too hot and
must be readjusted. This sensor

sensor

is set at 200

F and automatically

resets itself when cool.

VAPOR HIGH

TEMPERATURE

SAFETY CIRCUIT SHUTDOWN MESSAGES

The flame sensor

flame sensor

flame sensor has failed to de-

tect a burner flame indicating that the
burner

burner

burner has failed to light, there is a
problem with the flame sensing cir-
cuitry or the dryer is not getting
burner fuel. Before trying to repo-

Before trying to repo-

sition the flame probe, turn off the

sition the flame probe, turn off the
incoming power to the dryer at the

incoming power to the dryer at the

incoming power to the dryer at the
main safety disconnect.

main safety disconnect.

LOSS OF FLAME

opened, indicating an over tempera-
ture condition has occurred toward
the rear of the fan/heater housing

fan/heater housing

in an oblong covered electrical box.
This control is set at 200

F and must

be manually reset.

MOTOR OVERLOAD

The lid on the grain discharge box

lid on the grain discharge box

has opened, indicating that grain is
not being taken away fast enough
at the discharge box

discharge box

discharge box.

GRAIN HIGH

TEMPERATURE

The dryer has run low on grain, and
the OUT OF GRAIN TIMER has timed
out, shutting the dryer down. The un-

un-

load auger

load auger will clean out the dryer if
in CONTINUOUS FLOW operation.