Section 6 Electrical System
6-15
Harvest Sequence (cont.)
6. HARVEST
The hot gas valve(s) and HPR solenoid
valve remain open, allowing refrigerant
gas to warm the evaporator. This causes
the cubes to slide, as a sheet, off the
evaporator and into the storage bin.
The sliding sheet of cubes swings the
water curtain out, opening the bin switch.
This momentary opening and closing of
the bin switch terminates the Harvest
Cycle and returns the ice machine to the
Freeze Cycle (steps 3-4).
(Old Style Control Board Shown)
Remote Models
6. Harvest (Until Bin Switch Activation)
Toggle Switch
ICE
Bin Switch
Closed
Control Board Relays
#1 Open
Water Pump OFF
#2 Closed
Hot Gas Solenoid ON
Harvest Pressure Regulating (HPR) Solenoid ON
#3 Open
Water Dump Valve OFF
#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
SV1557
(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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