Section 6Electrical System
6-14
Harvest Sequence
5. WATER PURGE
The water pump continues to run as the
water dump valve energizes for 45
seconds to purge the water from the water
trough.
The hot gas valve(s) and HPR solenoid
valve open at the beginning of the water
purge. Hot refrigerant gas is diverted into
the evaporator throughout the 45-second
water purge.
After the 45-second water purge, the
water pump and dump valve de-energize.
New style control boards have an
adjustable water purge. This permits a 0
(off), 15, 30 or 45 second water purge.
(Old Style Control Board Shown)
Remote Models
5. Water Purge (45 Seconds)
Toggle Switch
ICE
Bin Switch
Closed
Control Board Relays
#1 Closed
Water Pump ON
#2 Closed
Hot Gas Solenoid ON
Harvest Pressure Regulating (HPR) Solenoid ON
#3 Closed
Water Dump Valve ON
#4 Closed
Contactor Coil ON
Liquid Line Solenoid Energized
Compressor ON
Condenser Fan Motor ON
Safety Controls (Which could stop ice machine operation)
High Pressure Cut-Out Closed
Main Fuse (On Control Board) Closed
Transformer Fuse (On Control Board) Closed
Thermistor Operation OK
SV1556
(74)
L1
TB35
SEE SERIAL PLATE FOR VOLTAGE
L2 (N)
TB32 (55)
HIGH
PRESSURE
CUT-OUT
HPR
SOLENOID
(79)(78)
(61)
(60)
(71)
(76)
(80)
HOT GAS
SOLENOID
DUMP
SOLENOID
TB30
TB30
TB30
TB30
(75)
(98) (99)
WATER
PUMP
TB31
TB37
(57)
(58)
(59) (82)(83)
LIQUID LINE
SOLENOID
CONTACTOR
COIL
(56)
(73)
(81)
TRANS. FUSE
FUSE (7A)
3
1
2
4
ICE THICKNESS PROBE
DISCHARGE LINE THERMISTOR
1D
1A
1C
1B
LOW D.C.
VOLTAGE
PLUG
(62)
(63)
(65)(64)
(66)
BIN SWITCH
(66)
(67)
(62)
(69)
(68)
ICE
OFF
CLEAN
HARVEST LIGHT/
SAFETY LIMIT CODE LIGHT
BIN SWITCH LIGHT
TOGGLE SWITCH
←
←←
←INTERNAL
WORKING VIEW
66
62
67
68
69
VIEW FOR WIRING
(49)
(47)
(46)
(45)
(50)
TB30
TB30
TB35
(48)(42)
(51)
(52)
L1
TB33 TB34
(53)
(F1) (F2)
CONTACTOR
CONTACTS
TERMINATES AT
PIN CONNECTION
COMPRESSOR RUN CAPACITOR
RR
PTCR
REMOTE FAN
MOTOR
RUN CAPACITOR
REMOTE
CONDENSER
*OVERLOAD
RS
C
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