As you work on a Q-Series Ice Machine, be sure to pay
close attention to the safety notices in this manual.
Disregarding the notices may lead to serious injury and/
or damage to the ice machine.
Throughout this manual, you will see the following types
of safety notices:
!
Warning
PERSONAL INJURY POTENTIAL
Do not operate equipment that has been misused,
abused, neglected, damaged, or altered/modified
from that of original manufact ured specifications.
Warning
!
Text in a Warning box alerts you to a potential
personal injury situation. Be sure to read the
Warning statement before proceeding, and work
carefully.
Caution
!
Text in a Caution box alerts you to a situation in
which you could damage the ice machine. Be sure
to read the Caution statement before proceeding,
and work carefully.
As you work on a Q-Series Ice Machine , be sur e to re ad
the procedural notices in this manual. These notices
supply helpful information which may assist you as you
work.
Throughout this manual, you will see the following types
of procedural notices:
Important
Text in an Important box provides you with
information that may help you perform a procedure
more efficiently. Disregarding this information will
not cause damage or injury, but it may slow you
down as you work.
NOTE: Text set off as a Note provides you with simple,
but useful, e xtra inf ormation about the procedure y ou are
performing.
We reserve the right to make product improvements at any time.
Specifications and design are subject to change without notice.
NOTE: Model numbers ending in 3 indicate a 3-phase
unit. Example: QY1804A3
Warning
!
PERSONAL INJURY POTENTIAL
Do not operate equipment that has been misused,
abused, neglected, damaged, or altered/modified
from that of original manufactured specifications.
Part No. 80-1100-31-1
Page 10
General InformationSection 1
Model/Serial Number Location
These numbers are required when requesting
information from your local Manitowoc distributor, or
Manitowoc Ice, Inc.
The model and serial number are listed on the MODEL/
SERIAL NUMBER DECAL affixed to the ice machine,
remote condenser and storage bin.
1-2
SV1600
Figure 1-1. Model/Serial Number Location
Part No. 80-1100-3
Page 11
Section 1General Information
Warranty Coverage
GENERAL
The following Warranty outline is provided for your
convenience. For a detailed explanation, read the
warranty bond shipped with each product.
Contact your local Manitowoc Distributor or Manitowoc
Ice, Inc. if you need further warranty information.
Important
This product is intended exclusively for commercial
application. No warranty is extended for personal,
family, or household purposes.
PARTS
1. Manitowoc warrants the ice machine a gainst def ects
in materials and workmanship, under normal use
and service for three (3) years from the date of
original installation.
2. The evaporator and compressor are covered by an
additional two (2) year (five years total) warranty
beginning on the date of the original installation.
LABOR
1. Labor required to repair or replace defective
components is covered for three (3) years from the
date of original installation.
2. The evaporator is covered by an additional two (2)
year (five years total) labor warranty beginning on
the date of the original installation.
EXCLUSIONS
The following items are not included in the ice machine’s
warranty coverage:
1. Normal maintenance, adjustments and cleaning.
2. Repairs due to unauthorized modifications to the ice
machine or use of non-standard parts without prior
written approval from Manitowoc Ice, Inc.
3. Damage caused by improper installation of the ice
machine, electrical supply, w ater supply or drainage,
or damage caused by floods , storms, or other acts of
God.
4. Premium labor rates due to holidays, overtime,
etc.; travel time; flat rate service call charges;
mileage and miscellaneous tools and material
charges not listed on the payment schedule.
Additional labor charges resulting from the
inaccessibility of equipment are also excluded.
5. Parts or assemblies subjected to misuse, abuse,
neglect or accidents.
6. Damage or problems caused by installation,
cleaning and/or maintenance procedures
inconsistent with the technical instructions provided
in this manual.
7. This product is intended exclusively for commercial
application. No warranty is extended for personal,
family, or household purposes.
AUTHORIZED WARRANTY SERVICE
To comply with the provisions of the warranty, a
refrigeration service company qualified and authorized
by a Manitowoc distributor, or a Contracted Service
Representative must perform the warranty repair.
Part No. 80-1100-31-3
Page 12
General InformationSection 1
THIS PAGE INTENTIONALLY LEFT BLANK
1-4
Part No. 80-1100-3
Page 13
Section 2
Installation Instructions
General
Refer to Installation Manual f or complete installation
guidelines.
Ice Machine Dimensions
Q320/Q370/Q420 ICE MACHINES
WATER COOLEDAIR COOLED
Failure to follow these installation guidelines may
affect warranty coverage.
Important
SV1602SV1611
Ice MachineDimension H
Q32021.5 in (54.6 cm)
Q37021.5 in (54.6 cm)
Q42026.5 in (67.3 cm)
Q45021.5 in (54.6 cm)
Q60021.5 in (54.6 cm)
Q80026.5 in (67.3 cm)
Q100029.5 in (74.9 cm)
SV1627
Ice MachineDimension H
Q1300/Q160029.5 in (74.9 cm)
Q180029.5 in (74.9 cm)
Part No. 80-1100-3
Page 15
Section 2Installation Instructions
Q1300/Q1600/Q1800 ICE MACHINES (CONT.)
REMOTE AIR-COOLED
SV1629
Ice Storage Bin Dimensions
S170/S400/S570 ICE STORAGE BINS
SV1609
Bin ModelDimension ADimension B
S17029.5 in (74.9 cm)19.1 in (48.5 cm)
S40034.0 in (86.3 cm)32.0 in (81.3 cm)
S57034.0 in (86.3 cm)44.0 in (111.7 cm)
S320/S420 ICE STORAGE BINS
SV1614
Bin ModelDimension ADimension B
S32034.0 in (86.3 cm)32.0 in (81.3 cm)
S42034.0 in (86.3 cm)44.0 in (111.7 cm)
Part No. 80-1100-32-3
Page 16
Installation InstructionsSection 2
S970 ICE STORAGE BINS
!
Warning
All Manitowoc ice machines require the ice storage
system (bin, dispenser, etc.) to incorporate an ice
deflector.
The Q1300, Q1600 and Q 1 80 0 series ice machines
require adding Manitowoc Ice Deflector Kit K00139
when installing with non-Manitowoc ice storage
systems.
Prior to using a non-Manitowoc ice storage system
with other Manitowoc ice machines, contact the
manufacturer to assure their ice deflector is
compatible with Manitowoc ice machines.
Remote Condenser Dimensions
JC0495/JC0895/JC1095/JC1395
SV1610SV1297
JC1895
2-4
SV1301
Part No. 80-1100-3
Page 17
Section 2Installation Instructions
Location of Ice Machine
The location selected for the ice machin e must meet the
following criteria. If any of these criteria are not met,
select another location.
•The location must be free of airborne and other
contaminants.
•The air temperature must be at least 35°F (1. 6°C),
but must not exceed 110°F (43.4°C).
•The location must not be near heat-generating
equipment or in direct sunlight.
•The location must not obstruct air flow through or
around the ice machine. Refer to the chart below for
clearance requirements.
Q1300/Q1600/
Q1800
Top/Sides24" (61 cm)8" (20.3 cm)
Back12" (30.5 cm)5" (12.7 cm)
Q370
Top/Sides12" (30.5 cm)5" (12.7 cm)
Back5" (127 mm)5" (12.7 cm)
All other
Q models
Top/Sides8" (20.3 cm)8" (20.3 cm)
Back5" (12.7 cm)5" (12.7 cm)
There is no minimum clearance required. This value is
recommended for efficient operation and servicing only.
Q1600 is not available as an air-cooled model.
The ice machine must be protected if it will be
subjected to temperatures belo w 32°F (0°C). Failure
caused by exposure to freezing temperatures is not
covered by the warranty. See “Removal from
Service/Winterization” on Page 3-14.
Self-Contained
Air-Cooled
Self-Contained
Air-Cooled
Self-Contained
Air-Cooled
Caution
!
Water-Cooled
and Remote
Water-Cooled
Water-Cooled
and Remote
Stacking Two Ice Machines on a Single
Storage Bin
A stacking kit is required for stacking two ice machines.
Installation instructions are supplied with the stac king kit.
Q450/Q600/
Q800/Q1000
Top/Sides16" (40.64 cm)5" (12.70 cm)
Back5" (12.70 cm)5" (12.70 cm)
Q1300/Q1600/
Q1800
Top/Sides48" (121.92 cm)24" (60.96 cm)
Back12" (30.48 cm)12" (30.48 cm)
*There is no minimum clearance required. This value is
recommended for efficient operation and servicing only.
Q1600 is not available as an air-cooled model.
B.T.U./Hour
Because the heat of rejection varies during the ice making cycle,
the figure shown is an average.
Air Conditioning
Heat of Rejection
Ice machines, like other refrigeration equipment, reject
heat through the condenser. It is helpful to know the
amount of heat rejected by the ice machine when sizing
air conditioning equipment where self -c on ta ine d aircooled ice machines are installed.
This information is also necessary when evaluating the
benefits of using water-cooled or remote condensers to
reduce air conditioning loads . The am ount of heat add ed
to an air conditioned environment by an ice machine
using a water-cooled or remote condenser is negligible.
Knowing the amount of heat rejected is also important
when sizing a cooling tower for a water-cooled
condenser. Use the peak figure for sizing the cooling
tower.
Peak
Part No. 80-1100-32-5
Page 18
Installation InstructionsSection 2
Leveling the Ice Storage Bin
1. Screw the leveling legs onto th e bottom of the bin.
2. Screw the foot of each leg in as far as possible.
Caution
!
The legs must be screwed in tightly to prevent them
from bending.
3. Move the bin into its final position.
4. Level the bin to assure that the bin door closes and
seals properly. Use a level on top of the bin. Turn
each foot as necessary to level the bin.
NOTE: An optional caster assembly is available for use
in place of the legs. Installation i nstructions are supp lied
with the casters.
Air-Cooled Baffle
The air-cooled baffle prevents condenser air from
recirculating. To install:
1. Remove the back panel screws next to the
condenser.
2. Align the mounting holes in the air baffle with the
screw holes and reinstall the screws.
SCREWS
AIR
BAFFLE
THREAD LEVELING
LEG INTO BASE OF
THREAD ‘FOOT’ IN AS
FAR AS POSSIBLE
Figure 2-1. Leveling Leg and Foot
CABINET
SV1607
Figure 2-2. Air Baffle
SV1606
2-6
Part No. 80-1100-3
Page 19
Section 2Installation Instructions
Electrical Service
GENERAL
Warning
!
All wiring must conform to local, state and national
codes.
VOLTA G E
The maximum allowabl e voltag e variation is ±10% of the
rated voltage at i ce machine start-up (when the electrical
load is highest).
!
Warning
The ice machine must be grounded in accordance
with national and local electrical codes.
FUSE/CIRCUIT BREAKER
A separate fuse/circuit break er must be provided for
each ice machine. Circuit breakers must be H.A.C.R.
rated (does not apply in Canada).
MINIMUM CIRCUIT AMPACITY
The minimum circuit ampacity is used to help select the
wire size of the electrical supply. (Minimum circuit
ampacity is not the ice machine’s running amp load.)
The wire size (or gauge) is also dependent upon
location, materials used, length of run, etc., so it must be
determined by a qualified electrician.
These diagrams are not intended to show proper
wire routing, wire sizing, disconnects, etc., only the
correct wire connections.
All electrical work, including wire routing and
grounding, must conform to local, state and national
electrical codes.
Though wire nuts are sho wn in the drawings, the ice
machine field wiring connections may use either
wire nuts or screw terminals.
SELF CONTAINED ICE MACHINE
115/1/60 OR 208-230/1/60
L
1
N=115V
OR
L2=208-230V
GROUND
GROUND
SELF CONTAINED ICE MACHINE
208-230/3/60
L
1
L
2
L
3
GROUND
ICE MACHINE
SV1190
L
1
CONNECTIONS
TO SEPARATE
FUSE/BREAKER
GROUND
L
1
L
2
L
3
SELF CONTAINED ICE MACHINE
230/1/50
L
1
L
1
SV1258
ICE MACHINE
CONNECTIONS
TO SEPARATE
FUSE/BREAKER
SV1191
N
GROUND
ICE MACHINE
CONNECTIONS
GROUND
TO SEPARATE
FUSE/BREAKER.
DISCONNECT ALL
POLES.
For United Kingdom Only
As the colours of the wires in the mains lead of the appliance may not correspond with the coloured markings
identifying the terminals in your plug, proceed as follows:
•The wire which is coloured green and yello w
the letter E or by the earth ground symbol or coloured green or green and yellow.
•The wire coloured blue
•The wire coloured brown
must be connected to the terminal which is marked with the letter N or coloured black.
must be connected to the terminal which is marked with the letter L or coloured red.
must be connected to the terminal in the plug which is marked with
N
Part No. 80-1100-32-9
Page 22
Installation InstructionsSection 2
Remote Electrical Wiring Connections
!
Warning
These diagrams are not intended to show proper
wire routing, wire sizing, disconnects, etc., only the
correct wire connections.
All electrical work, including wire routing and
grounding, must conform to local, state and national
electrical codes.
Though wire nuts are sho wn in the drawings, the ice
machine field wiring connections may use either
wire nuts or screw terminals.
REMOTE ICE MACHINE
WITH SINGLE CIRCUIT MODEL CONDENSER
115/1/60 OR 208-230/1/60
SINGLE CIRCUIT
REMOTE
CONDENSER
L
1
L
2
GROUND
NOTE:
CONDENSER FAN
MOTOR VOLTAGE
MATCHES ICE
MACHINE
VOLTAGE (115V
OR 208-230V)
REMOTE ICE MACHINE
WITH SINGLE CIRCUIT MODEL CONDENSER
208-230/3/60 OR 380-415/3/50
L
F
F
L
L
L
L
2
1
1
2
3
1
2
GROUND
GROUND
NOTE: FAN
MOTOR IS
208-230V
TO SEPARATE
FUSE/BREAKER
GROUND
SINGLE CIRCUIT
REMOTE
CONDENSER
ICE
MACHINE
SV1199
L
1
L
2
L
3
ICE
MACHINE
SV1255
F
2
F
1
L
1
L
2
GROUND
N=115V OR L2=208-230V
TO SEPARATE
FUSE/BREAKER
L
GROUND
REMOTE ICE MACHINE
WITH SINGLE CIRCUIT MODEL CONDENSER
230/1/50
1
L
2
SINGLE CIRCUIT
REMOTE
CONDENSER
ICE
MACHINE
SV1256
L
1
L
2
F
2
F
1
L
1
N
GROUND
TO SEPARATE
FUSE/BREAKER
DISCONNECT ALL
NOTE: FAN
MOTOR IS
220-240V
(220-240).
POLES.
L
N
GROUND
1
2-10
Part No. 80-1100-3
Page 23
Section 2Installation Instructions
Water Supply and Drain Requirements
WATER SUPPLY
Local water conditions may require treatment of the
water to inhibit scale formation, filter sediment, and
remove chlorine odor and taste.
Important
If you are installing a Manitowoc water filter system,
refer to the Installation Instructions supplied with the
filter system for ice making water inlet connections.
WATER INLET LINES
Follow these guidelines to install water inlet lines:
•Do not connect the ice machine to a hot wate r supply.
Be sure all hot water restrictors installed for other
equipment are working. (Check valves on sink
faucets, dishwashers, etc.)
•If water pressure exceeds the maximum
recommended pressure, obtain a water pressure
regulator from your Manitowoc distributor.
•Install a water shut-off valve for both the ice making
and condenser water lines.
•Insulate water inlet lines to prevent condensation.
DRAIN CONNECTIONS
Follow these guidelines when installing drain lines to
prevent drain water from flowing back into the ice
machine and storage bin:
•Drain lines must have a 1.5 inch drop per 5 feet of
run (2.5 cm per meter), and must not create traps.
•The floor drain must be large enough to
accommodate drainage from all drains.
•Run separate bin and ice machine drain lines.
Insulate them to prevent condensation.
•Vent the bin and ice machine drain to the
atmosphere. Do not vent the condenser drain on
water-cooled models.
Cooling Tower Applications
(Water-Cooled Models)
A water cooling tower installation does not require
modification of the ice machine. The water regulator
valve for the condenser continues to control the
refrigeration discharge pressure.
It is necessary to know the amount of heat rejection, and
the pressure drop through the condenser and water
valves (inlet and outlet) when using a cooling tower on
an ice machine.
•Water entering the co ndenser must not exceed 90°F
(32.2°C).
•Water flow th rough the condenser m ust not e xceed 5
gallons (19 liters) per minute.
•Allow for a pressure drop of 7 psi (48 kPA) between
the condenser water inlet and the outlet of the ice
machine.
•Water exiting the condenser must not exceed 110°F
(43.3°C).
Each remote ice machine ships from the factory with a
refrigerant charge appropriate for installation with line
sets of up to 50' (15.25 m). The serial tag on the ice
machine indicates the refrigerant charge.
Circuit
Condenser
Line Set*
RT-35-R404A
RT-50-R404A
RL-35-R404A
RL-50-R404A
Additional refrigerant may be required for installations
using line sets between 50' and 100' (15.25-30.5 m)
long. If additional refrigerant is required, an additional
label located next to the Model/Serial Numbers decal
states the amount of refrigerant to be added.
IMPORTANT
EPA CERTIFIED TECHNICIANS
If remote line set length is between 50' and 100' (15.25-
30.5 m), add
nameplate charge.
Tubing length: _______________________________
Refrigerant added to nameplate: ________________
New total refrigerant charge: ___________________
1.5 lb. (24 oz) (0.68 kg) of refrigerant to the
Figure 2-4. Typical Additional Refrigerant Label
If there is no additional label, the nameplate charge is
sufficient for line set s up to 100' (30. 5 m). (See the chart
below.)
WARNING
Potential Personal Injury Situation
The ice machine contains refrigerant charge. Installation of
the line sets must be performed by a properly trained and
EPA certified refrigeration technician aware of the dangers
Condensers must be mounted horizontally with the fan
motor on top.
Remote condenser installations consist of v ertical and
horizontal line sets between the ice machine and the
condenser. When combined, they must fit within
approved specifications. The following guidelines,
drawings and calculation methods must be followed to
verify a proper remote condenser installa tion.
Caution
!
The 60 month compressor warranty (including the
36 month labor replacement warranty) will not apply
if the remote ice machine is not installed according
to specifications.
This warranty also will not apply if the refrigeration
system is modified with a condenser, heat reclaim
device, or other parts or assemblies not
manufactured by Manitowoc Ice, Inc., unless
specifically approved in writing by Manitowoc Ice,
Inc.
GUIDELINES FOR ROUTING LINE SETS
First, cut a 2.5" (6.35 cm) circular hole in the wall or roof
for tubing routing. The line set en d with the 90° bend will
connect to the ice machine. The straight end will connect
to the remote condenser.
Follow these guidelines when routing the refrigerant
lines. This will help insure proper performance and
service accessibility.
1. Optional - Make the service loop in the line sets
(See Figure 2-5). This permits easy access to the
ice machine for cleaning and service. Do not use
hard rigid copper at this location.
2. Required - Do not form traps in the refrigeration lines
(except the service loop). Refrigerant oil must be
free to drain toward the ice machine or the
condenser. Route excess tubing in a supported
downward horizontal spiral (See Figure 2-5). Do not
coil tubing vertically.
3. Required - Keep outdoor refrigerant line runs as
short as possible.
The maximum length is 100' (30.5 m).
The ice machine compressor must have the proper oil
return. The receiver is designed to hold a char ge
sufficient to operate the ice machine in ambient
temperatures between -20°F (-28.9°C) and 120°F
(49°C), with line set lengths of up to 100' (30.5 m).
Line Set Rise/Drop
The maximum rise is 35' (10.7 m).
The maximum drop is 15' (4.5 m).
Caution
!
If a line set has a rise followed by a drop, another
rise cannot be made. Likewise, if a line set has a
drop followed by a rise, another drop cannot be
made.
Calculated Line Set Distance
The maximum distance is 150' (45.7 m).
Line set rises, drops, ho rizontal runs (or combina tions of
these) in excess of the stated maximums will exceed
compressor start-up and design limits. This will cause
poor oil return to the compressor.
Make the following calculations to mak e sure the line set
layout is within specifications.
1. Insert the measured rise into the formula below.
Multiply by 1.7 to get the calculated rise.
(Example: A condenser located 10 feet above the
ice machine has a calculated rise of 17 feet.)
2. Insert the measured drop into the formula below.
Multiply by 6.6 to get the calculated drop.
(Example. A condenser located 10 f eet below t he ice
machine has a calculated drop of 66 feet.)
3. Insert the measured horizontal distance into the
formula below. No calculation is necessary.
4. Add together the calculated rise, calculated drop,
and horizontal distance to get t he total calculated distance. If this total exceeds 150' (45.7 m), move
the condenser to a new location and perform the
calculations again.
Maximum Line Set Distance Formula
Step 1.Measured Rise (35' [10.7 m] Maximum)______ x 1.7=_______ Calculated Rise
Step 2.Measured Drop (15' [4.5 m] Maximum)______ x 6.6=_______ Calculated Drop
Step 3.Measured Horizontal Distance (100' [30.5 m] Maximum)_______ Horizontal Distance
Step 4.Total Calculated Distance 150' (45.7 m)_______ Total Calculated Distance
R
SV1196SV1195SV1194
Figure 2-6. Combination of a Rise
and a Horizontal Run
D
Figure 2-7. Combination of a Drop
and a Horizontal Run
R
Figure 2-8. Combination of a
Rise, a Drop and a Horizontal Run
D
Part No. 80-1100-32-15
Page 28
Installation InstructionsSection 2
LENGTHENING OR REDUCING LINE SET LENGTHS
In most cases, b y routing the line set properly,
shortening will not be necessary. When shortening or
lengthening is required, do so bef ore con necting the lin e
set to the ice machine or the remote condenser. This
prevents the loss of refrigerant in the ice machine or
condenser.
The quick connect fittings on the line sets are equipped
with Schraeder valves. Use these valves to recover any
vapor charge from the line set. When lengthening or
shortening lines, follow good refrigeration practices and
insulate new tubing. Do not change the tube sizes.
Evacuate the lines and place a bo ut 5 oz (1 43 g) of vapor
refrigerant charge in each line.
CONNECTING A LINE SET
1. Remove the dust caps from the line set, condenser
and ice machine.
2. Apply refr ig eratio n oil to the thr e ad s on the quick
disconnect couplers before connecting them to the
condenser.
3. Carefully thread the female fitting to the condenser
or ice machine by hand.
4. Tighten the couplings with a wrench until they
bottom out.
REMOTE RECEIVER SERVICE VALVE
The receiver service valve is closed during shipment.
Open the valve prior to starting the ice machine.
1. Remove the top and left side panels.
2. Remove the receiver service valve cap.
3. Backseat (open) the valve.
4. Reinstall the cap and panels.
REMOVE FRONT, TOP,
AND LEFT SIDE PANEL
FOR ACCESS TO
RECEIVER VALVE
TURN
COUNTERCLOCKWISE TO
OPEN
5. Turn an additional 1/4 turn to ensure proper brassto-brass seating. Torque to the following
specifications:
Liquid LineDischarge Line
10-12 ft lb.
(13.5-16.2 N•m)
35-45 ft lb.
(47.5-61.0 N•m)
6. Check all fittings for leaks.
RECEIVER SERVICE
VALVE CAP (TURN
SV1603
COUNTERCLOCKWISE TO
REMOVE)
Figure 2-9. Backseating the Receiver Service Valve
2-16
Part No. 80-1100-3
Page 29
Section 2Installation Instructions
Remote Ice Machine Usage with Non-Manitowoc Multi-Circuit Condensers
WARRANTY
The sixty (60) month compressor warranty, including
thirty six (36) month labor replacement warranty, shall not apply when the remote ice machine is not installed
within the remote specifications. The foregoing warranty
shall not apply to any ice machine installed and/or
maintained inconsistent with the technical instructions
provided by Manitowoc Ice, Inc. Performance may vary
from Sales specifications. Q-Model ARI certified
standard ratings only apply when used with a Manito woc
remote condenser.
If the design of the condenser meets the specificatio ns,
Manitowoc’ s only
be extended to the Manitowoc manufactured part of the
system. Since Manitowoc does not
conjunction with the ice machine, Manitowoc will not
endorse, recommend, or approve the condenser, and
will not be responsible for its performance or reliability..
approval is f or full w arranty cov erage to
test the condenser in
Important
Manitowoc warrants only complete new and unused
remote packages. Guaranteeing the integrity of a
new ice machine under the terms of our warranty
prohibits the use of pre-existing (used) tubing or
condensers.
HEAD PRESSURE CONTROL VALVE
Any remote condenser connected to a Manitowoc QModel Ice Machine must have a head pressure control
valve #836809 -3 (a v ailab le from Ma nitow oc Distributors)
installed on the condenser package. Manitowoc will not accept substitute “off the shelf” head pressure control
valves.
FAN MOTOR
The condenser fan must be on during the complete ice
machine freeze cycle (do not cycle on fan cycle control).
The ice maker has a condenser fan motor circuit for use
with a Manitowoc condenser . It is recommended that this
circuit be used to control the condenser fan(s) on the
multi-circuit condenser to assure it is on at the proper
time. Do not exceed the rated amps for the fan motor
circuit listed on the ice machine’s serial tag.
INTERNAL CONDENSER VOLUME
The multi-circuit condenser internal volume must not be
less than or exceed that used by Manitowoc (see chart
on Page 2-18). Do not exceed internal volume and try
to add charge to compensate, as compressor failure
will result.
CONDENSER ∆T
∆T is the difference in temperature between the
condensing refrigerant and entering air. The ∆T should
be 15 to 20°F (-9.4 to -6.6°C) at the beginning of the
freeze cycle (peak load conditions) and dr op down to 12
to 17°F (-11.1 to -8.3°C) during the last 75% of the
freeze cycle (average load conditions).
REFRIGERANT CHARGE
Remote ice machines have the serial plate refrigerant
charge (total system charge) located in the ice maker
section. (Remote condensers and line sets are supplied
with only a vapor charge.)
Caution
!
Never add more than nameplate charge to ice
machine for any application.
Caution
!
Do not use a fan cycling control to try to maintain
discharge pressure. Compressor failure will result.
Part No. 80-1100-32-17
QUICK CONNECT FITTINGS
The ice machine and line sets come with quick connect
fittings. It is recommended th at matching q uic k connects
(availab le through Manitow oc Distributors) be installed in
the multi-circuit condenser, and that a vapor “holding”
charge (5 oz.) of proper refrigerant be added to the
condenser prior to connection of the ice machine or line
set to the condenser.
Self-Contained Air- and Water-Cooled
Q200/Q280/Q320/Q370/Q420/Q450/Q600/Q800/Q1000/Q1300/Q1600/Q1800
INITIAL START-UP OR START-UP AFTER
AUTOMATIC SHUT-OFF
1. Water Purge
Before the compressor starts, the water pump and water
dump solenoid are energized for 45 seconds, to
completely purge the ice machine of old water. This
feature ensures that the ice making cycle starts with
fresh water.
The harvest valve(s) is also energized during water
purge, although it stays on for an additional 5 seconds
(50 seconds total on time) during the initial refrigeration
system start-up.
2. Refrigeration System Start-Up
The compressor starts after the 45 second water purge,
and it remains on throughout the entire Freeze and
Harvest Sequences. The water fill valve is energized at
the same time as the compressor. It remains on until the
water level sensor closes for 3 continuous seconds, or
until a six-minute time period has expired. The harvest
valve(s) remains on for 5 seconds during initial
compressor start-up and then shuts off.
At the same time the compressor starts, the condenser
fan motor (air-cooled models) is supplied with power
throughout the entire Freeze and Harvest Sequences.
The fan motor is wired through a fan cycle pressure
control, therefore it may cycle on and off. (The
compressor and condenser fan motor are wired through
the contactor. As a result, anytime the contactor coil is
energized, the compressor and fan motor are supplied
with power.)
FREEZE SEQUENCE
3. Prechill
The compressor is on for 30 seconds prior to water flow ,
to prechill the evaporator.
4. Freeze
The water pump restarts after the 30 second prechill. An
even flow of water is directed across the evaporator and
into each cube cell, where it freezes. The water fill valve
will cycle on and then off one more time to refill the water
trough.
When sufficient ice has formed, the water flow (not the
ice) contacts the ice thickness probe. After
approximately 7 seconds of continual water contact, the
harvest sequence is initiated. The ice machine cannot
initiate a harvest sequence until a 6 minute free ze lock
has been surpassed.
3-2
Figure 3-2. Freeze Sequence
(Typical Q450 Shown)
Continued on next page …
Part No. 80-1100-3
Page 35
Section 3Ice Machine Operation
HARVEST SEQUENCE
5. Water Purge
The water pump continues to run, and the water dump
valve energizes for 45 seconds to purge the water in the
sump trough. The water fill valve energizes (turns on)
and de-energizes (turns off) strictly by time. The water fill
valve energizes for the last 15 seconds of the 45-second
water purge. The water purge must be at the factory
setting of 45 seconds for the fill valve to energize during
the last 15 seconds of the Water Purge. If set at less
than 45 seconds the water fill valve does not energize
during the water purge.
After the 45 second water purge, the water fill valve,
water pump and dump valve de-energize. (Refer to
“Water Purge Adjustment” for details.) The harvest valve
also opens at the beginning of the water purge to divert
hot refrigerant gas into the evaporat or.
6. Harvest
The harvest valve(s) remains open and the refrigerant
gas warms the evaporator causing 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. The momentary opening and reclosing of the bin switch terminates the harvest
sequence and returns the ice machine to the freeze
sequence (Step 3 - 4.)
AUTOMATIC SHUT-OFF
7. Automatic Shut-Off
When the storage bin is full at the end of a harvest
sequence, the sheet of cubes fails to clear the water
curtain and will hold it open. After the water curtain is
held open for 7 seconds, the ice machine shuts off. The
ice machine remains off for 3 minutes before it can
automatically restart.
The ice machine remains off until enough ice has been
removed from the storage bin to allow the ice to fall clear
of the water curtain. As the water curtain swings back to
the operating position, the bin switch re-closes and the
ice machine restarts (step s 1 - 2) , pr ovided the 3 minute
delay period is complete.
Figure 3-4. Automatic Shut-Off (Typical Q450
Shown)
Figure 3-3. Harvest Sequence (Typical Q450 Shown)
Part No. 80-1100-33-3
Page 36
Ice Machine OperationSection 3
Remote
Q450/Q600/Q800/Q1000/Q1300/Q1600/Q1800
INITIAL START-UP OR START-UP AFTER
AUTOMATIC SHUT-OFF
1. Water Purge
Before the compressor starts, the water pump and water
dump solenoid are energized for 45 seconds, to
completely purge the ice machine of old water. This
feature ensures that the ice making cycle starts with
fresh water.
The harvest valve and harvest pressure regulating
(HPR) solenoid valves also energize during water purge,
although they stay on for an additional 5 seconds (50
seconds total on time) during the initial refrigeration
system start-up.
2. Refrigeration System Start-Up
The compressor and liquid line solenoid valve energize
after the 45 second water purge and remain on
throughout the entire Freeze and Harvest Sequences.
The water fill valve is energized at the same time as the
compressor. It remains on until the water level sensor
closes for 3 continuous seconds, or until a six-minute
time period has expired. The harvest valve and HPR
solenoid valves remain on for 5 seconds during initial
compressor start-up and then shut off.
FREEZE SEQUENCE
3. Prechill
The compressor is on for 30 seconds prior to water flow ,
to prechill the evaporator.
4. Freeze
The water pump restarts after the 30 second prechill. An
even flow of water is directed across the evaporator and
into each cube cell, where it freezes. The water fill valve
will cycle on and then off one more time to refill the water
trough.
When sufficient ice has formed, the water flow (not the
ice) contacts the ice thickness probe. After
approximately 7 seconds of continual water contact, the
harvest sequence is initiated. The ice machine cannot
initiate a harvest sequence until a 6 minute free ze lock
has been surpassed.
The remote condenser fan motor starts at the same time
the compressor starts and remains on throughout the
entire Freeze and Harvest Sequences. (The compressor
and condenser fan motor are wired through the
contactor, therefore, anytime the contactor coil is
energized, the compressor and fan motor are on.)
Figure 3-5. Freeze Sequence (Typical Q450 Shown)
Continued on next page …
3-4
Part No. 80-1100-3
Page 37
Section 3Ice Machine Operation
HARVEST SEQUENCE
5. Water Purge
The water pump continues to run, and the water dump
valve energizes for 45 seconds to purge the water in the
sump trough. The water fill valve energizes (turns on)
and de-energizes (turns off) strictly by time. The water fill
valve energizes for the last 15 seconds of the 45-second
water purge. The water purge must be at the factory
setting of 45 seconds for the fill valve to energize during
the last 15 seconds of the Water Purge. If set at less
than 45 seconds the water fill valve does not energize
during the water purge.
After the 45 second water purge, the water fill valve,
water pump and dump valve de-energize. (Refer to
“Water Purge Adjustment” for details.) The harvest
valve(s) and HPR solenoid valve also open at the
beginning of the water purge.
6. Harvest
The HPR valve and the harvest valve(s) remain open
and the refrigerant gas warms the evaporator causing
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. The
momentary opening and re-closing of the bin switch
terminates the harvest sequence and retu rn s th e ice
machine to the freeze sequence (Step 3 - 4.)
AUTOMATIC SHUT-OFF
7. Automatic Shut-Off
When the storage bin is full at the end of a harvest
sequence, the sheet of cubes fails to clear the water
curtain and will hold it open. After the water curtain is
held open for 7 seconds, the ice machine shuts off. The
ice machine remains off for 3 minutes before it can
automatically restart.
The ice machine remains off until enough ice has been
removed from the storage bin to allow the ice to drop
clear of the water curtain. As the water curtain swings
back to the operating position, the bin switch re-closes
and the ice machine restarts (steps 1 - 2) provided the 3
minute delay period is complete.
Figure 3-7. Automatic Shut-Off (Typical Q450
Shown)
Figure 3-6. Harvest Sequence (Typical Q450 Shown)
Part No. 80-1100-33-5
Page 38
Ice Machine OperationSection 3
Operational Checks
GENERAL
Manitowoc ice machines are factory-operated and
adjusted before shipment. Normally, new installations do
not require any adjustment.
To ensure proper operation, always follow the
Operational Checks:
•when starting the ice machine for the first time
•after a prolonged out of service period
•after cleaning and sanitizing
NOTE: Routine adjustments and maintenanc e
procedures are not covered by the warranty.
WATER LEVEL
The water level sensor is set to maintain the proper
water level above the water pump housing. The water
level is not adjustable.
If the water level is incorrect, check the water level probe
for damage (probe bent, etc.). Repair or replace the
probe as necessary.
ICE THICKNESS CHECK
The ice thickness probe is factory-set to maintain the ice
bridge thickness at 1/8" (3.2 mm).
NOTE: Make sure the water curtain is in place when
performing this check. It prevents water from splashing
out of the water trough.
1. Inspect the bridge connecting the cubes. It should
be about 1/8" (3.2 mm) thick.
2. If adjustment is necessary, turn the ice thickness
probe adjustment screw clockwise to increase
bridge thickness, counterclockwise to decrease
bridge thickness.
NOTE: Turning the adjustment 1/3 of a turn will change
the ice thickness about 1/16" (1.5 mm).
ADJUSTING SCREW
SV1616
1/8” ICE BRIDGE THICKNESS
SV1208
Figure 3-9. Ice Thickness Check
3. Make sure the ice thickness probe wire and the
bracket do not restrict movement of the probe.
3-6
Figure 3-8. Water Level Probe
Part No. 80-1100-3
Page 39
Section 3Ice Machine Operation
HARVEST SEQUENCE WATER PURGE
The harvest sequence water purge adjustment may be
used when the ice machine is hooked up to special
water systems, such as a de-ionized water treatment
system.
Important
The harvest sequence water purg e is factory-set at
45 seconds. A shorter purge setting (with standard
water supplies such as city water) is not
recommended. This can increase water system
cleaning and sanitizing requirements.
•The harvest sequence water purge may be set to 15,
30, or 45 seconds.
•During the harvest sequence water purge, the water
fill valve energizes and de-energizes by time. The
water purge must be at the factory setting of 45
seconds for the water fill valve to energize during the
last 15 seconds of the water purge. If it is set to less
than 45 seconds, the water fill valve will not energize
during the water purge.
CONTROL
BOARD
WATER PURGE
ADJUSTMENT
30
15
Figure 3-10. Water Purge Adjustment
45
SV1617
Part No. 80-1100-33-7
Page 40
Ice Machine OperationSection 3
THIS PAGE INTENTIONALLY LEFT BLANK
3-8
Part No. 80-1100-3
Page 41
Section 4Maintenance
Section 4
Maintenance
Interior Cleaning and Sanitizing
GENERAL
Clean and sanitize the ice machine every six months for
efficient operation. If the ice machine requires more
frequent cleaning and sanitizing, consult a qualified
service company to test the water quality and
recommend appropriate water treatment. The ice
machine must be taken apart for cleanin g and sanitizing.
Caution
!
Use only Manitowoc approved Ice Machine Cleaner
and Sanitizer for this application (Manitowoc
Cleaner part number 94-0546-3 and Manitowoc
Sanitizer part number 94-0565-3). It is a violation of
Federal law to use these solutions in a manner
inconsistent with their labeling. Read and
understand all labels printed on bottles before use.
CLEANING PROCEDURE
Caution
!
Do not mix Cleaner and Sanitizer solutions together.
It is a violation of Federal law to use these solutions
in a manner inconsistent with their labeling.
Step 3 Remove all ice from the bin.
Step 4 Place the toggle switch in the CLEAN position.
The water will flow through the water dump valve and
down the drain. Wait until the water trough refills and
water flows over the evaporator, then add the proper
amount of ice machine cleaner.
ModelAmount of Cleaner
Q200/Q280/Q322/Q3703 ounces (90 ml)
Q422/Q450/Q600/Q8005 ounces (150 ml)
Q1000/Q1300/Q1400/Q18009 ounces (265 ml)
Step 5 Wait until the clean cycle is complete
(approximately 30 minutes) then place the toggle switch
in the OFF position and disconnect power to the ice
machine (and dispenser when used).
!
Warning
Disconnect the electric power to the ice machine at
the electric service switch box..
Step 6 Remove parts for cleaning and hand sanitizing.
Warning
!
Wear rubber gloves and safety goggles ( an d/or face
shield) when handling ice machine Cleaner or
Sanitizer.
Ice machine cleaner is used to remove lime scale and
mineral deposits. Ice machine sanitizer disinfects and
removes algae and slime.
Step 1 Set the toggle switch to the OFF position after
ice falls from the evaporator at the end of a Harvest
cycle. Or, set the switch to the OFF position and allow
the ice to melt off the evaporator.
Caution
!
Never use anything to force ice from the evaporator.
Damage may result.
Step 2 Remove top cover. This will allow easiest
access for adding cleaning and sanitizing solutions.
A. Remove the water curtain
•Gently flex the curtain in the center and remove it
from the right side.
•Slide the left pin out.
Water Curtain Removal
Part No. 80-1100-34-1
Page 42
MaintenanceSection 4
B. Remove the ice thickness probe
•Compress the hinge pin on the top of the ice
thickness probe.
COMPRESS
HINGE PIN TO
REMOVE
SV3135
Ice Thickness Probe Removal
•Pivot the ice thickness probe to disengage one pin
then the other. The ice thickness probe can be
cleaned and sanitized at this point without complete
removal. If complete removal is desired, disconnect
the ice thickness control wiring from the control
board.
C. Remove the water distribution tube
•Disconnect the water hose from the distribution tube.
1. LIFT UP
2. SLIDE BACK
3. SLIDE TO RIGHT
DISTRIBUTION
TUBE
3
THUMBSCREW
2
1
THUMBSCREW
LOCATING
PIN
SV1620
Water Distribution Tube Removal
•Loosen the two thumbscrews which secure the
distribution tube.
•Lift the right side of the distribution tube up off the
locating pin, then slide it back and to the right.
Caution
!
Do not force this removal. Be sure the locating pin is
clear of the hole before sliding the distribution tube
out.
Disassemble for cleaning/sanitizing.
•Twist both of the inner tube ends until the tabs line up
with the keyways.
•Pull the inner tube ends outward.
INNER TUBE
INNER TUBE
KEYWAY
TAB
SV1211
Water Distribution Tube Disassembly
4-2
Part No. 80-1100-3
Page 43
Section 4Maintenance
D. Remove the white vinyl water distribution
tubing
•Disconnect the hose from the water pump outlet.
•Disconnect the hose from the dump valve (the tubing
pressure fits - pull tubing into evaporator
compartment).
E. Remove the water pump
•Disconnect the water pump power cord.
POWER
CORD
WATER
PUMP
LOOSEN
SCREWS
F. Remove the water level probe
•Loosen the screw that holds the water level probe in
place. The probe can easily be cleaned and sanitized
at this point without proceeding to step 2.
•If complete removal is required, disconnect the wire
lead from the control board inside the electrical
control box.
SCREW
WATER
LEVEL
PROBE
WATER
TROUGH
WIRE
LEAD
ICE
MACHINE
SIDE
PANEL
DO NOT SOAK
WATER PUMP
MOTOR IN
CLEANER OR
SANITIZER
SOLUTIONS
SV1618
Water Pump Removal
•Loosen the screws securing the pump mounting
bracket to the bulkhead.
•Lift the pump and bracket assembly off the screws.
SV1621
Water Level Probe Removal
Step 7 Mix a solution of cleaner and warm water.
Depending upon the amount of mineral buildup, a larger
quantity of solution may be required. Use the ratio in the
table below to mix enough solution to thoroughly clean
all parts.
Solution TypeWaterMixed With
Cleaner1 gal. (4 l)16 oz (500 ml) cleaner
Step 8 Use 1/2 of the cleaner/water mixture to clean all
components. The cleaner solution will foam when it
contacts lime scale and mineral deposits; once the
foaming stops use a soft-bristle nylo n brush, sponge or
cloth (NOT a wire brush) to carefully clean the parts.
Soak parts for 5 minutes (15 - 20 minutes for heavily
scaled parts). Rinse all components with clean water.
Part No. 80-1100-34-3
Page 44
MaintenanceSection 4
Step 9 While components are soaking, use 1/2 of the
cleaner/water solution to clean all foodzone surfaces of
the ice machine and bin (or dispenser). Use a nylon
brush or cloth to thoroughly clean the following ice
machine areas:
•Side walls
•Base (bottom of the water trough)
•Interior of the water trough
•Evaporator cells and evaporator plastic parts including top, bottom, and sides
•Bin or dispenser
•Ice machine top cover
Remove water trough drain plug and rinse all areas
thoroughly with clean water . Reinsta ll water trough drain
plug.
Clean/sanitize top,
bottom and sides
of evaporator.
Step 12 Use 1/2 of the sanitizer/water solution to
sanitize all foodzone surfaces of the ice machine and bin
(or dispenser). Use a cloth or sponge to liberally apply
the solution. Wipe all surfaces twice to ensure complete
coverage with sanitizer solution. When sanitizing, pay
particular attention to the following areas:
•Side walls
•Base (bottom of the water trough)
•Interior of water trough
•Evaporator cells and evaporator plastic parts including top, bottom and sides
•Bin or dispenser
•Ice machine top cover
Do not rinse the sanitized areas. Remove the water
trough drain plug and wipe with solution. When the
sanitizer solution has drained from the trough , reinstall
the water trough drain plug.
Step 13 Replace all removed components.
Step 14 Reapply power to the ice machine and place
the toggle switch in the CLEAN position.
Wipe bottom lip of
evaporator with a
sponge or cloth
soaked in cleaner
and then sanitizer
solution.
Step 10 Mix a solution of sanitizer and warm water.
Solution TypeWaterMixed With
Sanitizer6 gal. (23 l)4 oz (120 ml) sanitizer
Step 11 Use 1/2 of the sa nit izer /wa te r so lut ion to
sanitize all removed components. Use a cloth or sponge
to liberally apply the solution to all surfaces of the
removed parts or soak the removed parts in the
sanitizer/water solution. Do not rinse parts after
sanitizing.
Step 15 Wait about two minutes or until water starts to
flow over the evaporator. Add the proper amount of
Manitowoc Ice Machine Sanitizer to the water trough by
pouring between the water curtain and evaporator.
ModelAmount of Sanitizer
Q200 Q280 Q322 Q370
Q422 Q450 Q600 Q800
Q1000
Q1300 Q1600 Q18008.75 ounces (258 ml)
3 ounces (90 ml)
4-4
Part No. 80-1100-3
Page 45
Section 4Maintenance
Step 16 The ice machine will stop after the sanitize
cycle (approximately 30 minutes). Place the toggle
switch in the OFF position and disconnect power to the
ice machine.
!
Warning
Disconnect the electric power to the ice machine at
the electric service switch box..
Step 17 Repeat step 6 for hand sanitizing.
Step 18 Mix a solution of sanitizer and warm water.
Solution TypeWaterMixed With
Sanitizer6 gal. (23 l)4 oz (120 ml) sanitizer
Step 19 Use 1/2 of the sanitizer/water solution to
sanitize all removed components. Use a cloth or sponge
to liberally apply the solution to all surfaces of the
removed parts or soak the removed parts in the
sanitizer/water solution. Do not rinse parts after
sanitizing.
Step 20 Use 1/2 of the sanitizer/water solution to
sanitize all foodzone surfaces of the ice machine and bin
(or dispenser). Use a cloth or sponge to liberally apply
the solution. When sanitizing, pay particular attention to
the following areas:
•Side walls
•Base (bottom of the water trough)
•Interior of water trough
•Evaporator cells and evaporator plastic parts including top, bottom and sides
•Bin or dispenser
•Ice machine top cover
Do not rinse the sanitized areas. Remove the water
trough drain plug and wipe with solution. When the
sanitizer solution has drained from the trough, reinstall
the water trough drain plug.
Step 21 Install the removed parts, restore power and
place the toggle switch in the ICE position.
Part No. 80-1100-34-5
Page 46
MaintenanceSection 4
ADDITIONAL COMPONENT REMOVAL
The following components may be removed for easier
access in some installations or they may need to be
removed and cleaned to correct an operational problem.
Water Inlet Valve
The water inlet valve normally does not require removal
for cleaning. Refer to Section 5 for a list of causes for
“No Water Entering Water Trough” or “Water Overflows
Water Trough.
1. When the ice machine is off, the water inlet valve
must completely stop water flow into the machine.
2. When the ice machine is on, the water inlet valve
must allow the proper water flow through it. Set the
toggle switch to ON. Watch for water flow into the ice
machine. If the water flow is slow or only trickles into
the ice machine, refer to Section 5.
Follow the procedure below to remove the water inlet
valve.
Water Dump Valve
The water dump valve normally does not require
removal for cleaning. To determine if removal is
necessary:
1. Set the toggle switch to ICE.
2. Verify the water trough fills with water at the
beginning of the freeze cycle.
3. While the ice machine is in the freeze mode, check
the water trough to determine if the dump valve is
leaking. If there is no or little water in the water
trough (during the freeze cycle) the dump valve is
leaking.
A. If the dump valve is leaking, remove,
disassemble and clean it.
B. If the dump valve is not leaking, do not remove
it. Instead, follow the “Ice Machine Cleaning
Procedure”.
!
Warning
Disconnect the electric power to the ice machine
and dispenser at the electric service switch box and
turn off the water supply before proceeding.
1. Remove the 1/4” hex head screws.
2. Remove, clean, and install the filter screen.
FILTER
ACCESS
SCREWS
FILTER
SCREEN
LOCATION
WATER
INLET
VALVE
Follow the procedure below to remove the dump valve.
Warning
!
Disconnect the electric power to the ice machine at
the electric service switch box and turn off the water
supply before proceeding.
1. Leaving the wires attached, twist coil and rotate it
counter-clockwise1/4 turn.
2. Lift the coil assembly off the valve body.
3. Remove the spring, plunger, and nylon gasket from
the valve body.
NOTE: At this point, the water dump valve can easily be
cleaned. If complete removal is desired, continue with
step 4.
NOTE: During cleaning, do not stretch or damage the
spring.
4. Remove the tubing from the dump valve by twisting
the clamps off.
5. Twist the valve body to remove from mounting
bracket.
4-6
Part No. 80-1100-3
Page 47
Section 4Maintenance
COIL
SPRING
NYLON GASKET
Dump Valve Disassembly
PLUNGER
DIAPHRAM
MOUNTING BRACKET
VALVE BODY
Part No. 80-1100-34-7
Page 48
MaintenanceSection 4
Ice Machine Inspection
Check all water fittings and lines for leaks. Also, make
sure the refrigeration tubing is not rubbing or vibrating
against other tubing, panels, etc.
Do not put anything (boxes, etc.) on the sides or back of
the ice machine. There must be adequate airflow
through and around the ice machine to maximize ice
production and ensure long component life.
Exterior Cleaning
Clean the area around the ice machine as often as
necessary to maintain cleanliness and efficient
operation. Use cleaners designed for use with stainless
steel products.
Sponge any dust and dirt off the outside of the ice
machine with mild soap and water. Wipe dry with a
clean, soft cloth.
Heavy stains should be removed with stainless steel
wool. Never use plain steel wool or abrasive pads. They
will scratch the panels.
Cleaning the Condenser
GENERAL
!
Warning
Disconnect electric power to the ice machine head
section and the remote condensing unit at the
electric service switches before cleaning the
condenser.
A dirty condenser restricts airflow, resulting in
excessively high operating temperatures. This reduces
ice production and shortens component life. Clean the
condenser at least every six months. Follow the steps
below.
!
Warning
The condenser fins are sharp. Use care when
cleaning them.
1. The washable aluminum filter on self-contained ice
machines is designed to catch dust dirt lint and
grease. Clean the filter with a mild soap and water.
2. Clean the outside of the condenser with a soft brush
or a vacuum with a brush attachment. Be careful not
to bend the condenser fins.
3. Shine a flashlight through the condenser to check
for dirt between the fins. If dirt remains:
A. Blow compressed air through the condenser fins
from the inside. Be careful not to bend the fan
blades.
B. Use a commercial condenser coil cleaner.
Follow the directions and cautions supplied with
the cleaner.
4-8
Part No. 80-1100-3
Page 49
Section 4Maintenance
4. Straighten any bent condenser fins with a fin comb.
“COMB” DOWN
ONLY
CONDENSER
FIN
COMBS
SV1515
Straighten Bent Condenser Fins
5. Carefully wipe off the fan blades and motor with a
soft cloth. Do not bend the fan blades. If the fan
blades are excessively dirty, wash with warm, soapy
water and rinse thoroughly.
Caution
!
If you are cleaning the condenser fan blades with
water, cover the fan motor to prevent water damage
and disconnect electrical power.
Water-Cooled Condenser
and Water Regulating Valve
Symptoms of restrictions in the condenser water circu it
include:
•Low ice production
•High water consumption
•High operating temperatures
•High operating pressures
If the ice machine is experiencing any of these symptoms,
the water-cooled condenser and water regulating valve
may require cleaning due to scale build-up.
Because the cleaning procedures require special pump s
and cleaning solutions, qualified maintenance or service
personnel must perform them.
AlphaSan
The goal of AlphaSan® is to keep the plastic surfaces of
an ice machine cleaner, by reducing or delaying the
formation of bio-film. The active ingredient in AlphaSan
is the element silver in the form of silver ions (Ag+).
AlphaSan
exchange mechanism. When AlphaSan
compounded directly into a plastic part, a controlled
release of silver ions from the surface is regulated to
maintain an effective concentration at or near the
surface of the plastic ice machine part. AlphaSan’s
unique ability to effectively control the release of silver
not only protects against undesired discoloration of the
plastic, but also will last the life of the plastic part.
Although AlphaSan
does not eliminate the need for periodic cleaning and
maintenance. AlphaSan
taste of the ice or beverage.
®
®
slowly releases silver ions via an ion
®
helps prevent bio-film build up it
®
has no adverse effect on the
®
is
®
®
Part No. 80-1100-34-9
Page 50
MaintenanceSection 4
Removal from Service/Winterization
GENERAL
Special precautions must be taken if the ice machine is
to be removed from service for an extended period of
time or exposed to ambient temperatures of 32°F (0°C)
or below.
Caution
!
If water is allowed to remain in the ice machine in
freezing temperatures, severe damage to some
components could result. Damage of this nature is
not covered by the warranty.
Follow the applicable procedure below.
SELF-CONTAINED AIR-COOLED ICE MACHINES
1. Disconnect the electric power at the circuit breaker
or the electric service switch.
2. Turn off the water supply.
3. Remove the water from the water trough.
4. Disconnect and drain the incoming ice-making water
line at the rear of the ice machine.
5. Energize the ice machine and wait one minute for
the water inlet valve to open.
6. Blow compressed air in both the incoming water and
the drain openings in the rear of the ice machine
until no more water comes out of the inlet water lines
or the drain.
7. Make sure water is not trapped in any of the water
lines, drain lines, distribution tubes, etc.
WATER-COOLED ICE MACHINES
1. Perform steps 1-6 under “Self-Contained Air-Cooled
Ice Machines.”
2. Disconnect the incoming water and drain lines from
the water-cooled condenser.
3. Insert a large screwdriver between the bottom spring
coils of the water regulating valve. Pry upward to
open the valve.
SV1624
Pry Open the Water Regulating Valve
4-10
4. Hold the valve open and blow compressed air
through the condenser until no water remains.
REMOTE ICE MACHINES
1. Move the ICE/OFF/CLEAN switch to OFF.
2. “Frontseat” (shut off) the receiver service valves.
Hang a tag on the switch as a reminder to open the
valves before restarting.
3. Perform steps 1-6 under “Self-Contained Air-Cooled
Ice Machines.”
Part No. 80-1100-3
Page 51
Section 5
Water System Ice Making Sequence of Operation
NOTE: The sequence of operation is the same for selfcontained and remote models.
INITIAL START-UP OR START-UP AFTER
AUTOMATIC SHUT-OFF
1. Before the ice machine starts, the water pump and
water dump solenoid are energized for 45 seconds
to purge old water from the water trough. This
ensures that the ice-making cycle starts with fresh
water. The water fill valve energizes after the 45second water purge, and remains on until the water
level probe is satisfied.
FREEZE CYCLE
2. To pre-chill the evaporator, there is no water flow
over the evaporator for the first 30 seconds of the
freeze cycle.
TO DISTRIBUTION TUBE
3. The water pump starts after the 30-second pre-chill.
An even flow of water is directed across the
evaporator and into each cube cell.
During the first 45 seconds of the Freeze Cycle, the
water fill valve cycles on and off as many times as
needed to refill the water trough.
After the 45 seconds, the water fill valve cycles on
and off one more time to refill the water trough. The
water fill valve then remains off for the duration of
the Freeze Cycle.
WATER INLET VALVE SAFETY SHUT-OFF
This feature limits the w ater inlet v alve to a six-m inute on
time. Regardless of the water level probe input, the
control board automatically shuts off the water inlet valv e
if it remains on for 6 continuous minutes.
WATER INLET VALVE
TO DRAIN
WATER PUMP
WATER DUMP VALVE
SV1677
Figure 5-1. Water Flow Ov er the Evaporator
Part No. 80-1100-35-1
Page 52
Water System Ice Making Sequence of OperationSection 5
HARVEST CYCLE
4. The water pump and water dump solenoid are
energized for 45 seconds to purge the water from
the water trough. The water fill valve energizes for
the last 15 seconds of the 45-second purge cycle , to
flush sediment from the bottom of the water trough.
5. After the 45-second purge, the water pump and
water dump valve de-energize.
TO DISTRIBUTION TUBE
WATER DUMP VALVE
AUTOMATIC SHUT-OFF
There is no water flow during an au tomatic shut-off.
WATER INLET VALVE
WATER PUMP
5-2
TO DRAIN
SV1677
Figure 5-2. Water Flow Down the Drain
Part No. 80-1100-3
Page 53
Section 6
Electrical System
Energized Parts Charts
SELF-CONTAINED AIR- AND WATER-COOLED MODELS
Control Board RelaysContactor
Ice Making
Sequence Of
Operation
START-UP 1
1. Water Purge
2. Refrigeration
System
Start-Up
FREEZE
SEQUENCE
3. Pre-Chill
4. FreezeOnOffOffOnOn
HARVEST
SEQUENCE
5. Water Purge
6. HarvestOffOffOnOffOnOn
7. AUTOMATIC
SHUT-OFF
1. Initial Start-Up or Start-Up After Automatic Shut-Off
Condenser Fan Motor
The fan motor is wired through a fan cycle pressure
control, therefore, it may cycle on and off.
Harvest Water Purge
The circuit board has an adjustable water purge in the
harvest cycle. This permits a 15, 30 or 45 second purge
cycle.
Auto Shut-Off
The ice machine remains off for 3 minutes before it can
automatically restart. The ice machine restarts (steps 1-
2) immediately after the delay period, if the bin switch recloses prior to 3 minutes.
Safety Timers
The control board has the following non-adjustable
safety timers:
123455A5B
Water
Pump
OnOffOnOnOffOffOff45 Seconds
OffOnOnOffOnOn
Off
On
OffOffOffOffOffOffOff
Water Fill
Val ve
May cycle On/
Off during first
45 sec.
-----------
Cycles On,
then Off 1
more time
Locked Out
After Six
Minutes
30 sec. Off,
15 sec. On
Harvest
Val ve(s )
OffOffOnOn
OnOnOnOn
Water
Dump
Val v e
Contactor
Coil
FREEZE SEQUENCE
•The ice machine is locked into the freeze cycle for
the first 6 minutes, not allowing the ice thickness
probe to initiate a harvest sequence.
•The maximum freeze time is 60 minutes, at which
time the control board automatically initiates a
harvest sequence (steps 5-6).
HARVEST SEQUENCE
The maximum harvest time is 3-1/2 minutes, at which
time the control board automatically terminates the
harvest sequence. If the bin switch is open, the ice
machine will go to automatic shut-off (step 7). If the bin
switch is closed, the ice machine will go to the freeze
sequence (steps 3-4).
Com-
pressor
Condenser
Fan Motor
May Cycle
On/Off
May Cycle
On/Off
May Cycle
On/Off
May Cycle
On/Off
May Cycle
On/Off
Length
Of Time
5 Seconds
30 Seconds
Until 7 sec.
water contact
with ice
thickness probe
Factory-set at
45 Seconds
Bin switch
activation
Until bin switch
re-closes
Part No. 80-1100-36-1
Page 54
Electrical SystemSection 6
REMOTE MODELS
Control Board RelaysContactor
123455A5B
Ice Making
Sequence Of
Operation
START-UP
1. Water Purge
2. Refrigeration
System
Start-Up
FREEZE
SEQUENCE
3. Pre-Chill
4. FreezeOnOffOffOnOnOn
HARVEST
SEQUENCE
5. Water Purge
6. HarvestOffOffOnOffOnOnOn
7.AU TOMATIC
SHUT-OFF
1. Initial Start-Up or Start-Up After Automatic Shut-Off
1
Water
Pump
OnOffOnOn
OffOnOnOffOnOnOn5 Seconds
Off
On
OffOffOffOffOffOffOff
Water Fill
Val ve
May cycle On/
Off during first
45 sec.
------------
Cycles On,
then Off 1
more time
Locked Out
After Six
Minutes
30 sec. Off,
15 sec. On
Auto Shut-Off
a. Harvest
Valve(s)
b. HPR
Solenoid
OffOffOnOnOn30 Seconds
OnOnOnOnOn
Water
Dump
Val ve
FREEZE SEQUENCE
a.
Contactor
Coil
b. Liquid
Line
Solenoid
OffOffOff45 Seconds
Com-
pressor
Condenser
Fan Motor
Length
Of Time
Until 7 sec.
contact with
ice thickness
Factory-set
Seconds
Bin switch
activation
Until bin
switch re-
water
probe
at 45
closes
The ice machine remains off for 3 minutes before it can
automatically restart. The ice machine restarts (steps 1-
2) immediately after the delay period, if the bin switch recloses prior to 3 minutes.
Harvest Water Purge
The circuit board has an adjustable water purge in the
harvest cycle. This permits a 15, 30 or 45 second purge
cycle.
Safety Timers
The control board has the following non-adjustable
safety timers:
6-2
•The ice machine is locked into the freeze cycle for
the first 6 minutes, not allowing the ice thickness
probe to initiate a harvest sequence.
•The maximum freeze time is 60 minutes, at which
time the control board automatically initiates a
harvest sequence (steps 5-6).
HARVEST SEQUENCE
•The maximum harvest time is 3-1/2 minutes, at which
time the control board automatically terminates the
harvest sequence. If the bin switch is open, the ice
machine will go to automatic shut-off (step 7). If the
bin switch is closed, the ice machine will go to the
freeze sequence (steps 3-4).
Part No. 80-1100-3
Page 55
Section 6Electrical System
Wiring Diagram Sequence of
Operation
SELF-CONTAINED MODELS
Initial Start-Up or Start-Up After
Automatic Shut-Off
1. WATER PURGE
Before the compressor starts, the
water pump and water dump solenoid
are energized for 45 seconds to
purge old water from the ice
machine. This ensures that the icemaking cycle starts with fresh water.
The harvest valve(s) is also
energized during the water purge. In
the case of an initial refrigeration
start-up, it stays on for an additional
5 seconds (50 seconds total).
L1
TB35
TB35
TB32
HIGH PRES
CUTOUT
ICE THICKNESS PROBE
WATER LEVEL PROBE
NOT USED
CONTACTOR
CONTACTS
(42)
L1
TB33
(64)
(66)
(51)
(55)
(62)
(63)
BIN SWITCH
*OVERLOAD
(48)
(85)(86)
(52)
FAN CYCLE CONTROL
SEE SERIAL PLATE FOR VOLTAGE
(22)
(80)
(81)
TERMINATES AT
PIN CONNECTION
CONTACTOR
COIL
VIEW FOR WIRING
66
62
(57)
TB31
TB37
(21)
WATER
VALVE
(77)
HARVEST
SOLENOID
(76)
DUMP
SOLENOID
(98)
(59)
(73)
(56)
R
R
(45)
FAN MOTOR
(AIR COOLED ONLY)
(20)
(61)
(60)
2
4
1
3
5
TRANS.
FUSE (7A)
1C
1F
LOW D.C.
1G
VOLTAGE
PLUG
(65)
(67)
(66)
COMPRESSOR
R
C
(68)
(69)
(62)
S
(53)
RUN CAPACITOR**
(58)
CLEAN LIGHT
WATER LEVEL
BIN SWITCH LIGHT
HARVEST LIGHT/
SAFETY LIMIT CODE LIGHT
TOGGLE SWITCH
ICE
INTERNAL WORKING
OFF
VIEW
CLEAN
(49)
RUN CAPACITOR
(47)
(46)(50)
TB34
PTCR
WATER
PUMP
L2 (N)
(75)
TB30
(99)
TB30
(74)
TB30
TB30
68
67
69
TB30
TB30
SV1646-1
Figure 6-1.
Self-Contained — Water Purge
Table 6-1. Self-Contained Models
1. Water Purge (45 Seconds)
Toggle SwitchICE
Bin SwitchClosed
Control Board Relays
#1Water PumpClosed / ON
#2Water Fill ValveOpen / OFF
#3Harvest SolenoidClosed / ON
#4Water Dump ValveClosed / ON
#5Contactor CoilOpen / OFF
CompressorOFF
Condenser Fan MotorOFF
Safety Controls (Which could stop ice machine operation)
High Pressure Cut-OutClosed
Main Fuse (On Control Board)Closed
Part No. 80-1100-36-3
Page 56
Electrical SystemSection 6
2. REFRIGERATION SYSTEM
START-UP
The compressor starts after the 45second water purge, and it remains
on throughout the Freeze and
Harvest cycles.
The water fill valve is energized at the
same time as the compressor. It
remains on until the water level
sensor closes for 3 continuous
seconds.
The harvest valve(s) remains on for
the first 5 seconds of the initial
compressor start-up.
At the same time the compressor
starts, the condenser fan motor (aircooled models) is supplied with
power. It continues to be supplied
with power throughout the Freeze
and Harvest cycles.
The fan motor is wired through a fan
cycle pressure control, and may cycle
on and off. (The compressor and the
condenser fan motor are wired
through the contactor. Any time the
contactor coil is energized, these
components are supplied with
power.)
L1
TB35
TB35
SEE SERIAL PLATE FOR VOLTAGE
TB32
HIGH PRES
CUTOUT
ICE THICKNESS PROBE
WATER LEVEL PROBE
NOT USED
CONTACTOR
CONTACTS
(42)
L1
TB33
(64)
(66)
(51)
(55)
BIN SWITCH
(52)
(62)
(63)
(65)
*OVERLOAD
(48)
FAN CYCLE CONTROL
R
(85)(86)
2
4
1
3
5
TRANS.
FUSE (7A)
1C
1F
LOW D.C.
1G
VOLTAGE
PLUG
(67)
(66)
COMPRESSOR
C
(68)
(69)
(62)
S
(53)
RUN CAPACITOR**
(20)
(61)
(60)
(57)
(58)
CLEAN LIGHT
WATER LEVEL
BIN SWITCH LIGHT
HARVEST LIGHT/
SAFETY LIMIT CODE LIGHT
TOGGLE SWITCH
ICE
INTERNAL WORKING
OFF
VIEW
CLEAN
(49)
RUN CAPACITOR
(47)
(46)(50)
TB34
PTCR
(21)
WATER
VALVE
(77)
HARVEST
SOLENOID
(76)
DUMP
SOLENOID
(98)
TB31
TB37
(59)
(73)
(56)
R
R
(45)
FAN MOTOR
(AIR COOLED ONLY)
(22)
(80)
(81)
WATER
PUMP
TERMINATES AT
PIN CONNECTION
CONTACTOR
COIL
VIEW FOR WIRING
66
62
Figure 6-2. Self-Contained — Refrigeration System Start-Up
(75)
(99)
(74)
68
67
SV1646-2
L2 (N)
TB30
TB30
TB30
TB30
69
TB30
TB30
Table 6-2. Self-Contained Models
2. Refrigeration System Start Up (5 Seconds)
Toggle SwitchICE
Bin SwitchClosed
Control Board Relays
#1Water PumpOpen / OFF
#2Water Fill ValveClosed / ON
#3Harvest SolenoidClosed / ON
#4Water Dump ValveOpen / OFF
#5Contactor CoilClosed / ON
CompressorON
Condenser Fan MotorON
Safety Controls (Which could stop ice machine operation)
High Pressure Cut-OutClosed
Main Fuse (On Control Board)Closed
6-4
Part No. 80-1100-3
Page 57
Section 6Electrical System
Freeze Sequence
3. PRE-CHILL
To pre-chill the evaporator, the
compressor runs for 30 seconds prior
to water flow.
The water fill valve remains on until
the water level sensor closes for
three continuous seconds.
L1
TB35
TB35
TB32
HIGH PRES
CUTOUT
ICE THICKNESS PROBE
WATER LEVEL PROBE
NOT USED
CONTACTOR
CONTACTS
(42)
L1
TB33
(64)
(66)
(51)
(55)
BIN SWITCH
(52)
2
4
1
3
5
1C
1F
1G
(62)
(63)
(65)
*OVERLOAD
(48)
FAN CYCLE CONTROL
R
C
(85)(86)
TRANS.
FUSE (7A)
LOW D.C.
VOLTAGE
PLUG
(67)
(66)
COMPRESSOR
S
RUN CAPACITOR**
(53)
(20)
(61)
(60)
(58)
CLEAN LIGHT
WATER LEVEL
BIN SWITCH LIGHT
HARVEST LIGHT/
SAFETY LIMIT CODE LIGHT
(68)
ICE
(69)
OFF
CLEAN
(62)
(49)
RUN CAPACITOR
(47)
TB34
SEE SERIAL PLATE FOR VOLTAGE
(21)
WATER
VALVE
(77)
HARVEST
SOLENOID
(76)
DUMP
SOLENOID
(57)
TOGGLE SWITCH
INTERNAL WORKING
VIEW
(46)(50)
PTCR
(98)
TB31
TB37
(59)
(73)
(56)
R
R
(45)
FAN MOTOR
(AIR COOLED ONLY)
TERMINATES AT
PIN CONNECTION
CONTACTOR
COIL
VIEW FOR WIRING
66
62
(22)
(80)
(81)
WATER
PUMP
(99)
(74)
L2 (N)
(75)
68
67
69
SV1646-3
TB30
TB30
TB30
TB30
TB30
TB30
Figure 6-3. Self-Contained — Pre-Chill
Table 6-3. Self-Contained Models
3. Pre-Chill (30 Seconds)
Toggle SwitchICE
Bin SwitchClosed
Control Board Relays
#1Water PumpOpen / OFF
#2Water Fill ValveClosed / ON
#3Harvest SolenoidOpen / OFF
#4Water Dump ValveOpen / OFF
#5Contactor CoilClosed / ON
CompressorON
Condenser Fan MotorON
Safety Controls (Which could stop ice machine operation)
High Pressure Cut-OutClosed
Main Fuse (On Control Board)Closed
Part No. 80-1100-36-5
Page 58
Electrical SystemSection 6
4. FREEZE
The water pump starts after the 30second pre-chill. An even flow of
water is directed across the
evaporator and into each cube cell,
where it freezes.
After six minutes the water inlet valve
is locked out and can not add
additional water.
When sufficient ice has formed, the
water flow (not the ice) contacts the
ice thickness probes. After
approximately 7 seconds of continual
contact, a harvest cycle is initiated.
NOTE: The ice machine cannot
initiate a harvest cycle until a 6minute freeze lock has expired.
L1
TB35
TB35
TB32
HIGH PRES
CUTOUT
ICE THICKNESS PROBE
WATER LEVEL PROBE
NOT USED
CONTACTOR
CONTACTS
(42)
L1
TB33
(64)
(66)
(51)
(55)
(62)
(63)
BIN SWITCH
*OVERLOAD
(48)
(85)(86)
(52)
FAN CYCLE CONTROL
SEE SERIAL PLATE FOR VOLTAGE
(20)
(61)
(60)
2
4
1
3
5
TRANS.
FUSE (7A)
1C
1F
LOW D.C.
1G
VOLTAGE
PLUG
(65)
(66)
R
C
(67)
COMPRESSOR
S
(53)
RUN CAPACITOR**
(68)
(69)
(62)
(58)
CLEAN LIGHT
WATER LEVEL
BIN SWITCH LIGHT
HARVEST LIGHT/
SAFETY LIMIT CODE LIGHT
TOGGLE SWITCH
ICE
OFF
CLEAN
(49)
RUN CAPACITOR
(47)
(46)(50)
TB34
PTCR
(21)
WATER
VALVE
(77)
HARVEST
SOLENOID
(76)
DUMP
SOLENOID
(57)
INTERNAL WORKING
VIEW
(98)
TB31
TB37
(59)
(73)
(56)
R
R
(45)
FAN MOTOR
(AIR COOLED ONLY)
(22)
(80)
(81)
TERMINATES AT
PIN CONNECTION
CONTACTOR
COIL
VIEW FOR WIRING
66
62
WATER
PUMP
(99)
(74)
68
67
L2 (N)
(75)
TB30
TB30
TB30
TB30
69
SV1646-4
TB30
TB30
Figure 6-4.
Self-Contained — Freeze
Table 6-4. Self-Contained Models
4. Freeze (Until 7 Seconds of Water Contact with Ice Thickness Probe)
Toggle SwitchICE
Bin SwitchClosed
Control Board Relays
#1Water PumpClosed / ON
#2Water Fill ValveCycles ON then OFF
#3Harvest SolenoidOpen / OFF
#4Water Dump ValveOpen / OFF
#5Contactor CoilClosed / ON
CompressorON
Condenser Fan MotorON
Safety Controls (Which could stop ice machine operation)
High Pressure Cut-OutClosed
Main Fuse (On Control Board)Closed
6-6
Part No. 80-1100-3
Page 59
Section 6Electrical System
Harvest Sequence
5. WATER PURGE
The water pump continues to run,
and the water dump valve energizes
for 45 seconds to purge the water in
the sump trough. The water fill valve
energizes (turns on) and deenergizes (turns off) strictly by time.
The water fill valve energizes for the
last 15 seconds of the 45-second
water purge. The water purge must
be at the factory setting of 45
seconds for the fill valve to energize
during the last 15 seconds of the
Water Purge. If set at less than 45
seconds, the water fill valve does not
energize during the water purge.
After the 45 second water purge, the
water fill valve, water pump and
dump valve de-energize. (Refer to
“Water Purge Adjustment” on Page 3-3 for details.) The harvest valve
also opens at the beginning of the
water purge to divert hot refrigerant
gas into the evaporator.
L1
TB35
TB35
TB32
HIGH PRES
CUTOUT
ICE THICKNESS PROBE
WATER LEVEL PROBE
NOT USED
CONTACTOR
CONTACTS
(42)
L1
TB33
(64)
(66)
(51)
(52)
(55)
(62)
(63)
BIN SWITCH
*OVERLOAD
(48)
(85)(86)
FAN CYCLE CONTROL
SEE SERIAL PLATE FOR VOLTAGE
(20)
(61)
(60)
2
4
1
3
5
TRANS.
FUSE (7A)
1C
1F
LOW D.C.
1G
VOLTAGE
PLUG
(65)
R
C
(67)
(66)
COMPRESSOR
S
(53)
RUN CAPACITOR**
(68)
(69)
(62)
(58)
CLEAN LIGHT
WATER LEVEL
BIN SWITCH LIGHT
HARVEST LIGHT/
SAFETY LIMIT CODE LIGHT
TOGGLE SWITCH
ICE
OFF
CLEAN
(49)
RUN CAPACITOR
(47)
(46)(50)
TB34
PTCR
(21)
WATER
VALVE
(77)
HARVEST
SOLENOID
(76)
DUMP
SOLENOID
(57)
INTERNAL WORKING
VIEW
(98)
TB31
TB37
(59)
(73)
(56)
R
R
(45)
FAN MOTOR
(AIR COOLED ONLY)
(22)
(80)
(81)
TERMINATES AT
PIN CONNECTION
CONTACTOR
COIL
VIEW FOR WIRING
66
62
WATER
PUMP
(75)
(99)
(74)
68
67
69
SV1646-5
L2 (N)
TB30
TB30
TB30
TB30
TB30
TB30
Figure 6-5.
Self-Contained — Water Purge
Table 6-5. Self-Contained Models
5. Water Purge (45 Seconds)
Toggle SwitchICE
Bin SwitchClosed
Control Board Relays
#1Water PumpClosed / ON
#2Water Fill ValveCycles OFF then ON
#3Harvest SolenoidClosed / ON
#4Water Dump ValveClosed / ON
#5Contactor CoilClosed / ON
CompressorON
Condenser Fan MotorON
Safety Controls (Which could stop ice machine operation)
High Pressure Cut-OutClosed
Main Fuse (On Control Board)Closed
Part No. 80-1100-36-7
Page 60
Electrical SystemSection 6
6. HARVEST
The harvest valve(s) remains 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).
L1
TB35
TB35
TB32
HIGH PRES
CUTOUT
ICE THICKNESS PROBE
WATER LEVEL PROBE
NOT USED
CONTACTOR
CONTACTS
(42)
L1
TB33
(64)
(66)
(51)
(55)
(62)
(63)
BIN SWITCH
*OVERLOAD
(48)
(85)(86)
(52)
FAN CYCLE CONTROL
SEE SERIAL PLATE FOR VOLTAGE
(20)
(61)
(60)
2
4
1
3
5
TRANS.
FUSE (7A)
1C
1F
LOW D.C.
1G
VOLTAGE
PLUG
(65)
(66)
R
C
(67)
COMPRESSOR
S
(53)
RUN CAPACITOR**
(68)
(69)
(62)
(58)
CLEAN LIGHT
WATER LEVEL
BIN SWITCH LIGHT
HARVEST LIGHT/
SAFETY LIMIT CODE LIGHT
TOGGLE SWITCH
ICE
OFF
CLEAN
(49)
RUN CAPACITOR
(47)
(46)(50)
TB34
PTCR
(21)
WATER
VALVE
(77)
HARVEST
SOLENOID
(76)
DUMP
SOLENOID
(57)
INTERNAL WORKING
VIEW
(98)
TB31
TB37
(59)
(73)
(56)
R
R
(45)
FAN MOTOR
(AIR COOLED ONLY)
(22)
(80)
(81)
TERMINATES AT
PIN CONNECTION
CONTACTOR
COIL
VIEW FOR WIRING
66
62
WATER
PUMP
(75)
(99)
(74)
68
67
69
SV1646-6
L2 (N)
TB30
TB30
TB30
TB30
TB30
TB30
Figure 6-6. Self-Contained — Harvest
Table 6-6. Self-Contained Models
6. Harvest (Until Bin Switch Activation)
Toggle SwitchICE
Bin SwitchClosed
Control Board Relays
#1Water PumpOpen / OFF
#2Water Fill ValveOpen / OFF
#3Harvest SolenoidClosed / ON
#4Water Dump ValveOpen / OFF
#5Contactor CoilClosed / ON
CompressorON
Condenser Fan MotorON
Safety Controls (Which could stop ice machine operation)
High Pressure Cut-OutClosed
Main Fuse (On Control Board)Closed
6-8
Part No. 80-1100-3
Page 61
Section 6Electrical System
Automatic Shut-Off
7. AUTOMATIC SHUT-OFF
If the storage bin is full at the end of a
harvest cycle, the sheet of cubes fails
to clear the water curtain and holds it
open. After the water curtain is held
open for 7 seconds, the ice machine
shuts off.
The ice machine remains off until
enough ice is removed from the
storage bin to allow the sheet of
cubes to drop clear of the water
curtain. As the water curtain swings
back to the operating position, the bin
switch closes and the ice machine
restarts (steps 1-2).
NOTE: The ice machine must remain
off for 3 minutes before it can
automatically restart.
L1
TB35
TB35
TB32
HIGH PRES
CUTOUT
ICE THICKNESS PROBE
WATER LEVEL PROBE
NOT USED
CONTACTOR
CONTACTS
(42)
L1
TB33
(64)
(66)
(51)
(52)
(55)
(62)
(63)
BIN SWITCH
*OVERLOAD
(48)
(85)
FAN CYCLE CONTROL
(61)
(60)
2
4
1
3
5
TRANS.
FUSE (7A)
1C
1F
LOW D.C.
1G
VOLTAGE
PLUG
(65)
(67)
(66)
COMPRESSOR
R
S
C
(86)
(53)
RUN CAPACITOR**
CLEAN LIGHT
WATER LEVEL
BIN SWITCH LIGHT
HARVEST LIGHT/
SAFETY LIMIT CODE LIGHT
(68)
ICE
(69)
OFF
CLEAN
(62)
(49)
(47)
TB34
SEE SERIAL PLATE FOR VOLTAGE
(20)
(58)
TOGGLE SWITCH
RUN CAPACITOR
(46)(50)
PTCR
(21)
WATER
VALVE
(77)
HARVEST
SOLENOID
(76)
DUMP
SOLENOID
(57)
INTERNAL WORKING
VIEW
(98)
TB31
TB37
(59)
(73)
(56)
R
R
(45)
FAN MOTOR
(AIR COOLED ONLY)
TERMINATES AT
PIN CONNECTION
(22)
(80)
(81)
WATER
PUMP
CONTACTOR
COIL
VIEW FOR WIRING
66
62
L2 (N)
(75)
(99)
(74)
68
67
69
SV1646-7
TB30
TB30
TB30
TB30
TB30
TB30
Figure 6-7. Self-Contained — Automatic Shut-Off
Table 6-7. Self-Contained Models
7. Automatic Shut-Off (Until Bin Switch Closes)
Toggle SwitchICE
Bin SwitchOpen
Control Board Relays
#1Water PumpOpen / OFF
#2Water Fill ValveOpen / OFF
#3Harvest SolenoidOpen / OFF
#4Water Dump ValveOpen / OFF
#5Contactor CoilOpen / OFF
CompressorOFF
Condenser Fan MotorOFF
Safety Controls (Which could stop ice machine operation)
High Pressure Cut-OutClosed
Main Fuse (On Control Board)Closed
Part No. 80-1100-36-9
Page 62
Electrical SystemSection 6
REMOTE MODELS
Initial Start-Up Or Start-Up After
Automatic Shut-Off
1. WATER PURGE
Before the compressor starts, the
water pump and water dump solenoid
are energized for 45 seconds to
purge old water from the ice
machine. This ensures that the icemaking cycle starts with fresh water.
NOTE: The harvest valve and
harvest pressure regulating (HPR)
solenoid valve are also energized
during the water purge. In the case of
an initial refrigeration start-up, they
stay on for an additional 5 seconds
(50 seconds total).
TB35
TB35
L1
HIGH PRES
CUTOUT
ICE THICKNESS PROBE
WATER LEVEL PROBE
(42)
TB32
CONTACTOR
CONTACTS
L1
TB33
NOT USED
(64)
(66)
(51)
(55)
BIN SWITCH
*OVERLOAD
(48)
(52)
(62)
(63)
TERMINATES AT
PIN CONNECTION
(F1)
SEE SERIAL PLATE FOR VOLTAGE
(20)
HPR
(61)
(60)
2
4
1
3
5
TRANS.
FUSE (7A)
1C
1F
LOW D.C.
1G
VOLTAGE
PLUG
(65)
(67)
(66)
COMPRESSOR
R
S
C
(53)
(68)
ICE
(69)
OFF
CLEAN
(62)
(49)
(47)
TB34
CLEAN LIGHT
WATER LEVEL
BIN SWITCH LIGHT
HARVEST LIGHT/
SAFETY LIMIT CODE LIGHT
FAN MOTOR
SOLENOID
(77)
HARVEST
SOLENOID
DUMP
SOLENOID
(57)
TB31
(58)
TOGGLE SWITCH
INTERNAL WORKING
VIEW
RUN CAPACITOR
(46)
REMOTE
PTCR
TB37
(59)
(73)
(56)
R
(45)
(76)
(98)
R
REMOTE CONDENSER
(22)(21)
WATER
VALVE
(81)
WATER
PUMP
(83)
CONTACTOR
COIL
VIEW FOR WIRING
66
62
(50)
(79)(78)
(80)
(99)
LIQUID LINE
SOLENOID
67
(F2)
L2 (N)
(75)
TB30
TB30
(82)
(74)
TB30
TB30
68
69
TB30
TB30
SV1648-1
RUN CAPACITOR
Figure 6-8. Remote — Water Purge
Table 6-8. Remote Models
1. Water Purge (45 Seconds)
Toggle SwitchICE
Bin SwitchClosed
Control Board Relays
#1Water PumpClosed / ON
#2Water Fill ValveOpen / OFF
#3Harvest SolenoidClosed / ON
Harvest Pressure Regulating (HPR) SolenoidClosed / ON
#4Water Dump ValveClosed / ON
#5Contactor CoilOpen / OFF
Liquid Line SolenoidDe-energized
CompressorOFF
Condenser Fan MotorOFF
Safety Controls (Which could stop ice machine operation)
High Pressure Cut-OutClosed
Main Fuse (On Control Board)Closed
6-10
Part No. 80-1100-3
Page 63
Section 6Electrical System
2. REFRIGERATION SYSTEM
START-UP
The compressor, remote condenser
fan motor and liquid line solenoid
valve energize after the 45-second
water purge, and remain on
throughout the Freeze and Harvest
cycles.
The water fill valve is energized at the
same time as the compressor. It
remains on until the water level
sensor closes for 3 continuous
seconds.
The harvest valve and harvest
pressure regulating (HPR) solenoid
valve remain on for the first 5
seconds of the initial compressor
start-up.
NOTE: (The compressor and the
condenser fan motor are wired
through the contactor. Any time the
contactor coil is energized, these
components are supplied with
power.)
TB35
TB35
L1
HIGH PRES
CUTOUT
ICE THICKNESS PROBE
WATER LEVEL PROBE
(42)
TB32
CONTACTOR
CONTACTS
L1
TB33
NOT USED
(64)
(66)
(51)
(55)
BIN SWITCH
*OVERLOAD
(48)
(52)
(F1)
1C
1F
1G
(62)
(63)
(65)
R
C
TERMINATES AT
PIN CONNECTION
2
4
1
3
5
TRANS.
FUSE (7A)
LOW D.C.
VOLTAGE
PLUG
(67)
(66)
COMPRESSOR
SEE SERIAL PLATE FOR VOLTAGE
(20)
HPR
(61)
(60)
CLEAN LIGHT
WATER LEVEL
BIN SWITCH LIGHT
HARVEST LIGHT/
SAFETY LIMIT CODE LIGHT
(68)
ICE
(69)
OFF
CLEAN
(62)
(49)
S
(47)
(53)
TB34
FAN MOTOR
RUN CAPACITOR
SOLENOID
(77)
HARVEST
SOLENOID
DUMP
SOLENOID
(57)
TB31
(58)
TOGGLE SWITCH
INTERNAL WORKING
VIEW
RUN CAPACITOR
REMOTE
(46)
PTCR
TB37
(59)
(73)
(56)
R
(45)
(76)
(98)
R
REMOTE CONDENSER
WATER
VALVE
(81)
WATER
PUMP
(83)
CONTACTOR
COIL
VIEW FOR WIRING
66
62
(50)
(22)(21)
(79)(78)
(80)
LIQUID LINE
SOLENOID
(F2)
(99)
(82)
(74)
68
67
L2 (N)
(75)
69
SV1648-2
TB30
TB30
TB30
TB30
TB30
TB30
Figure 6-9. Remote — Refrigeration System Start-Up
Table 6-9. Remote Models
2. Refrigeration System Start-Up (5 Seconds)
Toggle SwitchICE
Bin SwitchClosed
Control Board Relays
#1Water PumpOpen / OFF
#2Water Fill ValveClosed / ON
#3Harvest SolenoidClosed / ON
Harvest Pressure Regulating (HPR) SolenoidClosed / ON
#4Water Dump ValveOpen / OFF
#5Contactor CoilClosed / ON
Liquid Line SolenoidEnergized
CompressorON
Condenser Fan MotorON
Safety Controls (Which could stop ice machine operation)
High Pressure Cut-OutClosed
Main Fuse (On Control Board)Closed
Part No. 80-1100-36-11
Page 64
Electrical SystemSection 6
Freeze Sequence
3. PRE-CHILL
To pre-chill the evaporator, the
compressor runs for 30 seconds prior
to water flow.
NOTE: The water fill valve remains
on until the water level sensor closes
for three continuous seconds.
TB35
TB35
L1
HIGH PRES
CUTOUT
ICE THICKNESS PROBE
WATER LEVEL PROBE
(42)
TB32
CONTACTOR
CONTACTS
L1
TB33
NOT USED
(64)
(66)
(51)
(55)
BIN SWITCH
*OVERLOAD
(48)
(52)
(62)
(63)
TERMINATES AT
PIN CONNECTION
(F1)
SEE SERIAL PLATE FOR VOLTAGE
(20)
HPR
(61)
(60)
2
4
1
3
5
TRANS.
FUSE (7A)
1C
1F
LOW D.C.
1G
VOLTAGE
PLUG
(65)
(67)
(66)
COMPRESSOR
R
S
C
(53)
(68)
(69)
(62)
ICE
OFF
CLEAN
(49)
(47)
TB34
RUN CAPACITOR
CLEAN LIGHT
WATER LEVEL
BIN SWITCH LIGHT
HARVEST LIGHT/
SAFETY LIMIT CODE LIGHT
FAN MOTOR
SOLENOID
(77)
HARVEST
SOLENOID
DUMP
SOLENOID
(57)
TB31
(58)
TOGGLE SWITCH
INTERNAL WORKING
VIEW
RUN CAPACITOR
(46)
REMOTE
PTCR
TB37
(59)
(73)
(56)
R
(45)
(76)
(98)
R
REMOTE CONDENSER
(22)(21)
WATER
VALVE
(81)
WATER
PUMP
(83)
CONTACTOR
COIL
VIEW FOR WIRING
66
62
(50)
(79)(78)
(80)
(99)
LIQUID LINE
SOLENOID
67
(F2)
(75)
(82)
(74)
68
69
SV1648-3
L2 (N)
TB30
TB30
TB30
TB30
TB30
TB30
Figure 6-10. Remote — Pre-Chill
Table 6-10. Remote Models
3. Pre-Chill (30 Seconds)
Toggle SwitchICE
Bin SwitchClosed
Control Board Relays
#1Water PumpOpen / OFF
#2Water Fill ValveClosed / ON
#3Harvest SolenoidOpen / OFF
Harvest Pressure Regulating (HPR) SolenoidOpen / OFF
#4Water Dump ValveOpen / OFF
#5Contactor CoilClosed / ON
Liquid Line SolenoidEnergized
CompressorON
Condenser Fan MotorON
Safety Controls (Which could stop ice machine operation)
High Pressure Cut-OutClosed
Main Fuse (On Control Board)Closed
6-12
Part No. 80-1100-3
Page 65
Section 6Electrical System
4. FREEZE
The water pump starts after the 30second pre-chill. An even flow of
water is directed across the
evaporator and into each cube cell,
where it freezes.
After six minutes the water inlet valve
is locked out and can not add
additional water.
When sufficient ice has formed, the
water flow (not the ice) contacts the
ice thickness probes. After
approximately 7 seconds of continual
contact, a harvest cycle is initiated.
NOTE: The ice machine cannot
initiate a harvest cycle until a 6minute freeze lock has expired.
TB35
TB35
L1
HIGH PRES
CUTOUT
ICE THICKNESS PROBE
WATER LEVEL PROBE
(42)
TB32
CONTACTOR
CONTACTS
L1
TB33
NOT USED
(64)
(66)
(51)
(55)
BIN SWITCH
*OVERLOAD
(48)
(52)
(F1)
1C
1F
1G
(62)
(63)
(65)
R
C
TERMINATES AT
PIN CONNECTION
2
4
1
3
5
TRANS.
FUSE (7A)
LOW D.C.
VOLTAGE
PLUG
(67)
(66)
COMPRESSOR
SEE SERIAL PLATE FOR VOLTAGE
(20)
HPR
(61)
(60)
CLEAN LIGHT
WATER LEVEL
BIN SWITCH LIGHT
HARVEST LIGHT/
SAFETY LIMIT CODE LIGHT
(68)
ICE
(69)
OFF
CLEAN
(62)
(49)
S
(47)
(53)
TB34
FAN MOTOR
RUN CAPACITOR
SOLENOID
(77)
HARVEST
SOLENOID
DUMP
SOLENOID
(57)
TB31
(58)
TOGGLE SWITCH
INTERNAL WORKING
VIEW
RUN CAPACITOR
REMOTE
(46)
PTCR
TB37
(59)
(73)
(56)
R
(45)
(76)
(98)
R
REMOTE CONDENSER
WATER
VALVE
(81)
WATER
PUMP
(83)
CONTACTOR
COIL
VIEW FOR WIRING
66
62
(50)
(22)(21)
(79)(78)
(80)
LIQUID LINE
SOLENOID
(F2)
(75)
(99)
(82)
(74)
68
67
69
SV1648-4
L2 (N)
TB30
TB30
TB30
TB30
TB30
TB30
Figure 6-11. Remote — Freeze
Table 6-11. Remote Models
4. Freeze (Until 7 Seconds of Water Contact with Ice Thickness Probe)
Toggle SwitchICE
Bin SwitchClosed
Control Board Relays
#1Water PumpClosed / ON
#2Water Fill ValveCycles / ON then OFF
#3Harvest SolenoidOpen / OFF
Harvest Pressure Regulating (HPR) SolenoidOpen / OFF
#4Water Dump ValveOpen / OFF
#5Contactor CoilClosed / ON
Liquid Line SolenoidEnergized
CompressorON
Condenser Fan MotorON
Safety Controls (Which could stop ice machine operation)
High Pressure Cut-OutClosed
Main Fuse (On Control Board)Closed
Part No. 80-1100-36-13
Page 66
Electrical SystemSection 6
Harvest Sequence
5. WATER PURGE
The water pump continues to run,
and the water dump valve energizes
for 45 seconds to purge the water in
the sump trough. The water fill valve
energizes (turns on) and deenergizes (turns off) strictly by time.
The water fill valve energizes for the
last 15 seconds of the 45-second
water purge. The water purge must
be at the factory setting of 45
seconds for the fill valve to energize
during the last 15 seconds of the
Water Purge. If set at less than 45
seconds the water fill valve does not
energize during the water purge.
NOTE: After the 45 second water
purge, the water fill valve, water
pump and dump valve de-energize.
(Refer to “Water Purge Adjustment”
on Page 3-3 for details.) The harvest
valve and HPR solenoid also open at
the beginning of the water purge to
divert hot refrigerant gas into the
evaporator.
TB35
TB35
L1
HIGH PRES
CUTOUT
ICE THICKNESS PROBE
WATER LEVEL PROBE
(42)
TB32
CONTACTOR
CONTACTS
L1
TB33
NOT USED
(64)
(66)
(51)
(55)
BIN SWITCH
*OVERLOAD
(48)
(52)
(62)
(63)
TERMINATES AT
PIN CONNECTION
(F1)
SEE SERIAL PLATE FOR VOLTAGE
(20)
HPR
(61)
(60)
2
4
1
3
5
TRANS.
FUSE (7A)
1C
1F
LOW D.C.
1G
VOLTAGE
PLUG
(65)
(67)
(66)
COMPRESSOR
R
S
C
(53)
(68)
(69)
(62)
ICE
OFF
CLEAN
(49)
(47)
TB34
RUN CAPACITOR
CLEAN LIGHT
WATER LEVEL
BIN SWITCH LIGHT
HARVEST LIGHT/
SAFETY LIMIT CODE LIGHT
FAN MOTOR
SOLENOID
(77)
HARVEST
SOLENOID
DUMP
SOLENOID
(57)
TB31
(58)
TOGGLE SWITCH
INTERNAL WORKING
VIEW
RUN CAPACITOR
(46)
REMOTE
PTCR
TB37
(59)
(73)
(56)
R
(45)
(76)
(98)
R
REMOTE CONDENSER
(22)(21)
WATER
VALVE
(81)
WATER
PUMP
(83)
CONTACTOR
COIL
VIEW FOR WIRING
66
62
(50)
(79)(78)
(80)
(99)
LIQUID LINE
SOLENOID
67
(F2)
(75)
(82)
(74)
68
69
SV1648-5
L2 (N)
TB30
TB30
TB30
TB30
TB30
TB30
Figure 6-12. Remote — Water Purge
Table 6-12. Remote Models
5. Water Purge (45 Seconds)
Toggle SwitchICE
Bin SwitchClosed
Control Board Relays
#1Water PumpClosed / ON
#2Water Fill ValveCycles / OFF then ON
#3Harvest SolenoidClosed / ON
Harvest Pressure Regulating (HPR) SolenoidClosed / ON
#4Water Dump ValveClosed / ON
#5Contactor CoilClosed / ON
Liquid Line SolenoidEnergized
CompressorON
Condenser Fan MotorON
Safety Controls (Which could stop ice machine operation)
High Pressure Cut-OutClosed
Main Fuse (On Control Board)Closed
6-14
Part No. 80-1100-3
Page 67
Section 6Electrical System
6. HARVEST
The harvest 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).
TB35
TB35
L1
HIGH PRES
CUTOUT
ICE THICKNESS PROBE
WATER LEVEL PROBE
(42)
TB32
CONTACTOR
CONTACTS
L1
TB33
NOT USED
(64)
(66)
(51)
(55)
BIN SWITCH
*OVERLOAD
(48)
(52)
(F1)
1C
1F
1G
(62)
(63)
(65)
R
C
TERMINATES AT
PIN CONNECTION
2
4
1
3
5
TRANS.
FUSE (7A)
LOW D.C.
VOLTAGE
PLUG
(67)
(66)
COMPRESSOR
SEE SERIAL PLATE FOR VOLTAGE
(20)
HPR
(61)
(60)
CLEAN LIGHT
WATER LEVEL
BIN SWITCH LIGHT
HARVEST LIGHT/
SAFETY LIMIT CODE LIGHT
(68)
ICE
(69)
OFF
CLEAN
(62)
(49)
S
(47)
(53)
TB34
FAN MOTOR
SOLENOID
(77)
HARVEST
SOLENOID
DUMP
SOLENOID
(57)
TB31
(58)
TOGGLE SWITCH
INTERNAL WORKING
VIEW
RUN CAPACITOR
REMOTE
(46)
PTCR
TB37
(59)
(73)
(56)
R
(45)
(76)
(98)
R
REMOTE CONDENSER
WATER
VALVE
(78)
(81)
WATER
PUMP
(83)
CONTACTOR
COIL
VIEW FOR WIRING
66
62
(50)
(22)(21)
(79)
(80)
LIQUID LINE
SOLENOID
(F2)
L2 (N)
(75)
TB30
(99)
68
67
TB30
(82)
(74)
TB30
TB30
69
TB30
TB30
SV1648-6
RUN CAPACITOR
Figure 6-13. Remote — Harvest
Table 6-13. Remote Models
6. Harvest (Until Bin Switch Activation)
Toggle SwitchICE
Bin SwitchClosed
Control Board Relays
#1Water PumpOpen / OFF
#2Water Fill ValveOpen / OFF
#3Harvest SolenoidClosed / ON
Harvest Pressure Regulating (HPR) SolenoidClosed / ON
#4Water Dump ValveOpen / OFF
#5Contactor CoilClosed / ON
Liquid Line SolenoidEnergized
CompressorON
Condenser Fan MotorON
Safety Controls (Which could stop ice machine operation)
High Pressure Cut-OutClosed
Main Fuse (On Control Board)Closed
Part No. 80-1100-36-15
Page 68
Electrical SystemSection 6
Automatic Shut-Off
7. AUTOMATIC SHUT-OFF
If the storage bin is full at the end of a
harvest cycle, the sheet of cubes fails
to clear the water curtain and holds it
open. After the water curtain is held
open for 7 seconds, the ice machine
shuts off.
The ice machine remains off until
enough ice is removed from the
storage bin to allow the sheet of
cubes to drop clear of the water
curtain. As the water curtain swings
back to the operating position, the bin
switch closes and the ice machine
restarts.
NOTE: The ice machine must remain
off for 3 minutes before it can
automatically restart.
TB35
TB35
L1
HIGH PRES
CUTOUT
ICE THICKNESS PROBE
WATER LEVEL PROBE
(42)
TB32
CONTACTOR
CONTACTS
L1
TB33
NOT USED
(64)
(66)
(51)
(55)
BIN SWITCH
*OVERLOAD
(48)
(52)
(62)
(63)
TERMINATES AT
PIN CONNECTION
(F1)
SEE SERIAL PLATE FOR VOLTAGE
(20)
HPR
(61)
(60)
2
4
1
3
5
TRANS.
FUSE (7A)
1C
1F
LOW D.C.
1G
VOLTAGE
PLUG
(65)
(67)
(66)
COMPRESSOR
R
S
C
(53)
(68)
(69)
(62)
ICE
OFF
CLEAN
(49)
(47)
TB34
RUN CAPACITOR
CLEAN LIGHT
WATER LEVEL
BIN SWITCH LIGHT
HARVEST LIGHT/
SAFETY LIMIT CODE LIGHT
FAN MOTOR
SOLENOID
(77)
HARVEST
SOLENOID
DUMP
SOLENOID
(57)
TB31
(58)
TOGGLE SWITCH
INTERNAL WORKING
VIEW
RUN CAPACITOR
(46)
REMOTE
PTCR
TB37
(59)
(73)
(56)
R
(45)
(76)
(98)
R
REMOTE CONDENSER
(22)(21)
WATER
VALVE
(81)
WATER
PUMP
(83)
CONTACTOR
COIL
VIEW FOR WIRING
66
62
(50)
(79)(78)
(80)
(99)
LIQUID LINE
SOLENOID
67
(F2)
(75)
(82)
(74)
68
69
SV1648-7
L2 (N)
TB30
TB30
TB30
TB30
TB30
TB30
Figure 6-14. Remote — Automatic Shut-Off
Table 6-14. Remote Models
7. Automatic Shut-Off (Until Bin Switch Closes)
Toggle SwitchICE
Bin SwitchOpen
Control Board Relays
#1Water PumpOpen / OFF
#2Water Fill ValveOpen / OFF
#3Harvest SolenoidOpen / OFF
Harvest Pressure Regulating (HPR) SolenoidOpen / OFF
#4Water Dump ValveOpen / OFF
#5Contactor CoilOpen / OFF
Liquid Line SolenoidDe-energized
CompressorON
Condenser Fan MotorON
Safety Controls (Which could stop ice machine operation)
High Pressure Cut-OutClosed
Main Fuse (On Control Board)Closed
6-16
Part No. 80-1100-3
Page 69
Section 6Electrical System
Wiring Diagrams
The following pages contain electrical wiring diagrams. Be sure you are referring to the correct diagram for the ice
machine which you are servicing.
Warning
!
Always disconnect power before working on
electrical circuitry.
WIRING DIAGRAM LEGEND
The following symbols are used on all of the wiring diagrams:
*Internal Compressor Overload
(Some models have external compressor overloads)
**Fan Motor Run Capacitor
(Some models do not incorporate fan motor run capacitor)
TBTerminal Board Connection
(Terminal board numbers are printed on the actual terminal board)
Q200/Q280/Q320 - SELF CONTAINED - 1 PHASE WITH TERMINAL BOARD
TB35
TB35
L1
HIGH PRES
CUTOUT
ICE THICKNESS PROBE
(42)
TB32
CONTACTOR
CONTACTS
L1
TB33
CAUTION: DISCONNECT POWER BEFORE WORKING
WATER LEVEL PROBE
ON ELECTRICAL CIRCUITRY.
DIAGRAM SHOWN DURING FREEZE CYCLE
(64)
(66)
(51)
(48)
(55)
NOT USED
BIN SWITCH
(52)
(62)
(63)
*OVERLOAD
(85)(86)
FAN CYCLE CONTROL
2
4
1
3
5
TRANS.
1C
1F
1G
(65)
R
C
FUSE (7A)
LOW D.C.
VOLTAGE
PLUG
(67)
(66)
COMPRESSOR
S
TOGGLE SWITCH
(68)
(69)
(62)
(49)
(47)
(53)
TB34
(20)
(61)
(60)
(57)
TB31
(58)
TB37
CLEAN LIGHT
WATER LEVEL LIGHT
BIN SWITCH LIGHT
HARVEST LIGHT/
SAFETY LIMIT CODE LIGHT
ICE
INTERNAL WORKING
OFF
VIEW
CLEAN
PTCR
FAN MOTOR
(AIR COOLED ONLY)
RUN CAPACITOR**
SEE SERIAL PLATE FOR VOLTAGE
(21)(22)
WATER
VALVE
(77)
HARVEST
SOLENOID
(59)
(56)
(76)
DUMP
SOLENOID
(98)
(73)
TERMINATES AT
PIN CONNECTION
(80)
(81)
WATER
PUMP
CONTACTOR
COIL
VIEW FOR WIRING
66
62
(50)
(99)
(74)
(75)
68
67
69
L2 (N)
TB3
TB3
TB3
TB3
TB3
TB3
TB3
SV1654
6-18
Part No. 80-1100-3
Page 71
Section 6Electrical System
Q280/Q370 - SELF CONTAINED - 1 PHASE WITHOUT TERMINAL BOARD
SEE SERIAL PLATE FOR VOLTAGE
L1
HIGH PRES
CUTOUT
(88)
(42)
CAUTION: DISCONNECT POWER BEFORE WORKING
(89)
ICE THICKNESS PROBE
WATER LEVEL PROBE
ON ELECTRICAL CIRCUITRY.
DIAGRAM SHOWN DURING FREEZE CYCLE
(55)
NOT USED
(64)
BIN SWITCH
(66)
(62)
(63)
(65)
2
4
3
1
5
TRANS.
1C
1F
1G
FUSE (7A)
LOW D.C.
VOLTAGE
PLUG
(67)
(66)
(68)
(69)
(62)
(20)
(61)
(60)
(57)
(58)
CLEAN LIGHT
WATER LEVEL
BIN SWITCH LIGHT
HARVEST LIGHT/
SAFETY LIMIT CODE LIGHT
VIEW FOR
ICE
OFF
CLEAN
WIRING
66
62
(21)
(77)
HARVEST
SOLENOID
(59)
(56)
WATER
VALVE
(76)
DUMP
SOLENOID
(98)
67
69
68
(22)
(81)
WATER
PUMP
TERMINATES AT
PIN CONNECTION
(74)
(80)
(99)
CONTACTOR
COIL
L2 (N)
(75)
CONTACTOR
CONTACTS
L1
OVERLOAD INTERNAL
{230V 50/60 HZ}
(51)
R
C
(48)
(46)
POTENTIAL
RELAY
(86)(85)
FAN CYCLE CONTROL
COMPRESSOR
S
5
4
(45)
(47)
S
(49)
2
(44)
1
START
CAPACITOR
RUN CAPACITOR**
FAN MOTOR
(AIR COOLED ONLY)
R
C
COMPRESSOR
TERMINAL LAYOUT
VIEWED FROM END
OF COMPRESSOR
(50)
SV3018
Part No. 80-1100-36-19
Page 72
Electrical SystemSection 6
Q320 - SELF CONTAINED - 1 PHASE WITHOUT TERMINAL BOARD
CAUTION: DISCONNECT POWER BEFORE WORKING
L1
(55)
WATER LEVEL PROBE
NOT USED
BIN SWITCH
(64)
(48)
(51)
(42)
HIGH PRES
CUTOUT
(88)
CONTACTOR
CONTACTS
L1
(89)
ICE THICKNESS PROBE
ON ELECTRICAL CIRCUITRY.
DIAGRAM SHOWN DURING FREEZE CYCLE
(61)
2
4
3
1
5
TRANS.
FUSE (7A)
1C
1F
1G
LOW D.C.
VOLTAGE
PLUG
(62)
(63)
(65)
R
C
*OVERLOAD
(85)
TOGGLE SWITCH
(67)
(66)
COMPRESSOR
S
(86)
(68)
(69)
(62)
(20)
(60)
(57)
(58)
CLEAN LIGHT
WATER LEVEL
BIN SWITCH LIGHT
HARVEST LIGHT/
SAFETY LIMIT CODE LIGHT
ICE
OFF
CLEAN
(49)
(47)
66
62
FAN MOTOR
(AIR COOLED ONLY)
SEE SERIAL PLATE FOR VOLTAGE
(21)
WATER
VALVE
(77)
HARVEST
SOLENOID
(76)
DUMP
SOLENOID
(98)
68
67
69
TERMINATES AT
PIN CONNECTION
(56)
(59)
VIEW FOR WIRING
PTCR
(22)
(80)
(81)
(99)
WATER
PUMP
CONTACTOR
COIL
(74)
(50)
L2 (N)
(75)
6-20
FAN CYCLE CONTROL
OVERLOAD
RUN CAPACITOR**
COMPRESSOR
(48)
(49)
(47)
RUN CAPACITOR
(46)
PTCR
R
(45)
Part No. 80-1100-3
R
SV2070
(50)
Page 73
Section 6Electrical System
0
Q420/Q450/Q600/Q800/Q1000 - SELF CONTAINED 1 PHASE WITH TERMINAL BOARD
TB35
L1
HIGH PRES
CUTOUT
ICE THICKNESS PROBE
WATER LEVEL PROBE
CAUTION: DISCONNECT POWER BEFORE WORKING
ON ELECTRICAL CIRCUITRY.
DIAGRAM SHOWN DURING FREEZE CYCLE
(64)
(66)
(55)
BIN SWITCH
2
4
1
3
5
TRANS.
1C
1F
1G
(62)
(63)
(65)
TB32
NOT USED
FUSE (7A)
LOW D.C.
VOLTAGE
PLUG
(67)
(66)
(60)
TOGGLE SWITCH
(68)
(69)
(62)
SEE SERIAL PLATE FOR VOLTAGE
(20)
(61)
(57)
TB31
(58)
TB37
(56)
CLEAN LIGHT
WATER LEVEL LIGHT
BIN SWITCH LIGHT
HARVEST LIGHT/
SAFETY LIMIT CODE LIGHT
ICE
INTERNAL WORKING
OFF
VIEW
CLEAN
(21)
WATER
VALVE
(77)
HARVEST
SOLENOID
(76)
DUMP
SOLENOID
(98)
(59)
(73)
(22)
(80)
(81)
WATER
PUMP
TERMINATES AT
PIN CONNECTION
CONTACTOR
COIL
VIEW FOR WIRING
66
62
(99)
(74)
67
68
(75)
69
L2 (N)
TB30
TB30
TB30
TB30
(49)
TB35
(42)
CONTACTOR
CONTACTS
L1
TB33
(51)
*OVERLOAD
(48)
(52)
(85)(86)
FAN CYCLE CONTROL
COMPRESSOR
R
S
C
(53)
RUN CAPACITOR**
(47)
TB34
RUN CAPACITOR
R
R
(46)(50)
(45)
PTCR
FAN MOTOR
(AIR COOLED ONLY)
TB3
TB30
SV1646
Part No. 80-1100-36-21
Page 74
Electrical SystemSection 6
Q420/Q450/Q600/Q800/Q1000 - SELF CONTAINED 1 PHASE WITHOUT TERMINAL BOARD
L1
(89)
HIGH PRES
CUTOUT
(88)
ICE THICKNESS PROBE
WATER LEVEL PROBE
NOT USED
BIN SWITCH
CAUTION: DISCONNECT POWER BEFORE WORKING
ON ELECTRICAL CIRCUITRY.
DIAGRAM SHOWN DURING FREEZE CYCLE
(55)
2
4
3
1
5
TRANS.
FUSE (7A)
1C
1F
1G
(62)
(63)
(64)
(65)
(67)
(66)
LOW D.C.
VOLTAGE
PLUG
TOGGLE SWITCH
(62)
(68)
(69)
(20)(21)
(61)
(60)
(57)
(58)
(56)
CLEAN LIGHT
WATER LEVEL
BIN SWITCH LIGHT
HARVEST LIGHT/
SAFETY LIMIT CODE LIGHT
ICE
OFF
CLEAN
VIEW FOR WIRING
66
62
SEE SERIAL PLATE FOR VOLTAGE
(22)
WATER
VALVE
(77)
HARVEST
SOLENOID
(76)
DUMP
SOLENOID
(98)
WATER
PUMP
(59)
CONTACTOR
COIL
68
67
69
TERMINATES AT
PIN CONNECTION
(80)
(81)
(99)
(74)
L2 (N)
(75)
6-22
(42)
CONTACTOR
CONTACTS
L1
(48)
(51)
*OVERLOAD
(85)
FAN CYCLE CONTROL
COMPRESSOR
R
C
(86)
(49)
S
(47)
(45)
PTCR
FAN MOTOR
(AIR COOLED ONLY)
RUN CAPACITOR**
(50)
(46)
(50)
SV2071
Part No. 80-1100-3
Page 75
Section 6Electrical System
Q800/Q1000 - SELF CONTAINED - 3 PHASE WITH TERMINAL BOARD
SEE SERIAL PLATE FOR VOLTAGE
L1
L2
L3
TB35
ICE THICKNESS PROBE
WATER LEVEL PROBE
HIGH PRES
CUTOUT
NOT USED
CAUTION: DISCONNECT POWER BEFORE WORKING
TB32
(64)
BIN SWITCH
(66)
ON ELECTRICAL CIRCUITRY.
DIAGRAM SHOWN DURING FREEZE CYCLE
2
4
1
(65)
3
5
TRANS.
FUSE (7A)
1C
1F
1G
LOW D.C.
VOLTAGE
PLUG
(67)
(66)
(55)
(62)
(63)
TOGGLE SWITCH
(68)
(69)
(62)
(20)
(61)
(60)
(57)
TB31
(58)
TB37
CLEAN LIGHT
WATER LEVEL LIGHT
BIN SWITCH LIGHT
HARVEST LIGHT/
SAFETY LIMIT CODE LIGHT
ICE
INTERNAL WORKING
OFF
VIEW
CLEAN
HARVEST
SOLENOID
DUMP
SOLENOID
(59)
(56)
(21)
WATER
VALVE
(77)
(76)
(98)
(73)
(22)
(80)
(81)
WATER
PUMP
TERMINATES AT
PIN CONNECTION
CONTACTOR
COIL
VIEW FOR WIRING
66
62
(99)
(74)
67
(75)
68
TB30
TB30
TB30
TB30
69
(53)
(96)
TB34
RUN CAPACITOR**
FAN MOTOR
(AIR COOLED ONLY)
(42)
L2
L1
L3
T2
T1
T3
TB35
COMPRESSOR
TB33
(52)
(85)
FAN CYCLE CONTROL
(86)
TB30
TB30
SV1647a
Part No. 80-1100-36-23
Page 76
Electrical SystemSection 6
Q800/Q1000 - SELF CONTAINED - 3 PHASE WITHOUT TERMINAL BOARD
CAUTION: DISCONNECT POWER BEFORE WORKING
ON ELECTRICAL CIRCUITRY.
DIAGRAM SHOWN DURING FREEZE CYCLE
SEE SERIAL PLATE FOR VOLTAGE
L1L2L3
(89)
(88)
(42)
ICE THICKNESS PROBE
WATER LEVEL PROBE
HIGH PRES
CUTOUT
NOT USED
BIN SWITCH
(55)
(64)
(62)
(63)
(65)
2
4
3
1
5
TRANS.
FUSE (7A)
1C
1F
1G
LOW D.C.
VOLTAGE
PLUG
TOGGLE SWITCH
(67)
(66)
(68)
(69)
(62)
(20)(21)
(61)
(60)
(57)
(58)
(56)
CLEAN LIGHT
WATER LEVEL
BIN SWITCH LIGHT
HARVEST LIGHT/
SAFETY LIMIT CODE LIGHT
ICE
OFF
CLEAN
WATER
VALVE
(77)
HARVEST
SOLENOID
(76)
DUMP
SOLENOID
(98)
WATER
PUMP
(59)
CONTACTOR
COIL
VIEW FOR WIRING
66
62
(22)
(80)
(81)
(99)
TERMINATES AT
PIN CONNECTION
68
67
69
(75)
(74)
L3
6-24
L1
L2
CONTACTOR
CONTACTS
(51)
T2
T1T3
(85)
FAN CYCLE CONTROL
(86)
FAN MOTOR
(AIR COOLED ONLY)
RUN CAPACITOR**
SV2072
Part No. 80-1100-3
Page 77
Section 6Electrical System
Q1300/Q1800 - SELF CONTAINED - 1 PHASE WITH TERMINAL BOARD
TB35
L1
HIGH PRES
CUTOUT
ICE THICKNESS PROBE
WATER LEVEL PROBE
(64)
(66)
(55)
BIN SWITCH
TB32
AUCS DISPENSE TIME
CAUTION: DISCONNECT POWER BEFORE WORKING
DIAGRAM SHOWN DURING FREEZE CYCLE
ON ELECTRICAL CIRCUITRY.
2
4
1
3
5
TRANS.
FUSE (7A)
1C
1F
LOW D.C.
1G
VOLTAGE
PLUG
(62)
(63)
(65)
(67)
(66)
TOGGLE SWITCH
(68)
(69)
(62)
(20)
RH HARVEST
(61)
(60)
(58)
CLEAN LIGHT
WATER LEVEL LIGHT
BIN SWITCH LIGHT
HARVEST LIGHT/
SAFETY LIMIT CODE LIGHT
ICE
OFF
CLEAN
SOLENOID
LH HARVEST
SOLENOID
(57)
TB31
TB37
INTERNAL WORKING
VIEW
SEE SERIAL PLATE FOR VOLTAGE
WATER
(21)
(77)
(59)
(73)
(56)
(88)
(76)
DUMP
SOLENOID
(98)
TERMINATES AT
PIN CONNECTION
VALVE
(87)
(80)
(81)
WATER
PUMP
CONTACTOR
COIL
VIEW FOR WIRING
66
62
(22)
(99)
(74)
(75)
68
67
L2(N)
TB30
TB30
TB30
TB30
69
TB35
TB35
(42)
CONTACTOR
CONTACTS
L1
TB33
(95)
(51)
(52)
*OVERLOAD
(48)
(85)(86)
FAN CYCLE CONTROL
CRANKCASE HEATER
R
C
COMPRESSOR
S
(53)
RUN CAPACITOR**
(47)
TB34
(49)
RUN CAPACITOR
R
(46)(50)
(45)
PTCR
(44)
FAN MOTOR
(AIR COOLED ONLY)
(94)
R
CONTACTOR
CONTACTS
L2
(96)
TB30
TB30
SV1652
Part No. 80-1100-36-25
Page 78
Electrical SystemSection 6
Q1300/Q1600/Q1800 - SELF CONTAINED - 1 PHASE WITHOUT TERMINAL BOARD
L1
HIGH PRES
CUTOUT
(88)
(42)
ICE THICKNESS PROBE
WATER LEVEL PROBE
(89)
AUCS DISPENSE TIME
BIN SWITCH
(64)
CAUTION: DISCONNECT POWER BEFORE WORKING
ON ELECTRICAL CIRCUITRY.
DIAGRAM SHOWN DURING FREEZE CYCLE
(55)
2
4
3
1
5
TRANS.
FUSE (7A)
1C
1F
1G
LOW D.C.
VOLTAGE
PLUG
(62)
(63)
(65)
TOGGLE SWITCH
(67)
(66)
(62)
(60)
CLEAN LIGHT
WATER LEVEL LIGHT
BIN SWITCH LIGHT
HARVEST LIGHT/
SAFETY LIMIT CODE LIGHT
(68)
ICE
(69)
OFF
CLEAN
SEE SERIAL PLATE FOR VOLTAGE
(20)(21)
(61)
HARVEST
SOLENOID
DUMP
SOLENOID
(57)
(59)
(58)
(56)
VIEW FOR WIRING
66
62
WATER
VALVE
(77)
(76)
(98)
WATER
PUMP
CONTACTOR
COIL
68
67
(22)
(80)
(81)
(99)
TERMINATES AT
PIN CONNECTION
(74)
69
L2 (N)
(75)
6-26
(95)
*OVERLOAD
L1L2
CONTACTOR
CONTACTS
(48)
(51)
(85)
FAN CYCLE CONTROL
CRANKCASE HEATER
COMPRESSOR
R
C
(86)
(94)
(49)
RUN CAPACITOR
S
(47)
PTCR
RUN CAPACITOR**
(46)
(45)
FAN MOTOR
(AIR COOLED ONLY)
(50)
CONTACTOR
CONTACTS
Part No. 80-1100-3
(96)
SV2075
Page 79
Section 6Electrical System
Q1300/Q1800 - SELF CONTAINED - 3 PHASE WITH TERMINAL BOARD
SEE SERIAL PLATE FOR VOLTAGE
L3 L2 L1
TB35
TB32
HIGH PRES
CUTOUT
ICE THICKNESS PROBE
WATER LEVEL PROBE
AUCS DISPENSE TIME
(64)
(66)
CAUTION: DISCONNECT POWER BEFORE WORKING
BIN SWITCH
ON ELECTRICAL CIRCUITRY.
DIAGRAM SHOWN DURING FREEZE CYCLE
2
4
1
(65)
3
5
TRANS.
1C
1F
1G
FUSE (7A)
LOW D.C.
VOLTAGE
PLUG
(67)
(66)
TOGGLE SWITCH
(55)
(62)
(63)
(68)
(69)
(62)
(20)
(61)
(60)
(57)
(58)
CLEAN LIGHT
WATER LEVEL LIGHT
BIN SWITCH LIGHT
HARVEST LIGHT/
SAFETY LIMIT CODE LIGHT
ICE
INTERNAL WORKING
OFF
VIEW
CLEAN
(21)
RH HARVEST
SOLENOID
(77)
LH HARVEST
SOLENOID
TB31
TB37
(56)
(88)
(76)
(59)
(73)
DUMP
SOLENOID
(98)
WATER
VALVE
(87)
(80)
(81)
WATER
PUMP
TERMINATES AT
PIN CONNECTION
CONTACTOR
COIL
VIEW FOR WIRING
66
62
(22)
(99)
(74)
N - 50HZ
ONLY
(75)
TB30
TB30
TB30
TB30
TB30
68
67
69
L2L3
T3
L1
T2
COMPRESSOR
T1
TB35
(42)
TB35
TB33
(95)
(52)
(85)
FAN CYCLE CONTROL
CRANKCASE HEATER
(96)
NOTE: WIRE (96) IS NOT USED ON 50HZ
(86)
(53)
TB34
RUN CAPACITOR**
FAN MOTOR
(AIR COOLED ONLY)
(94)
TB30
TB30
TB30
SV1653
Part No. 80-1100-36-27
Page 80
Electrical SystemSection 6
Q1300/Q1600/Q1800 - SELF CONTAINED - 3 PHASE WITHOUT TERMINAL BOARD
SEE SERIAL PLATE FOR VOLTAGE
L3 L2 L1
(88)
(42)
ICE THICKNESS PROBE
WATER LEVEL PROBE
(89)(55)
HIGH PRES
CUTOUT
AUCS DISPENSE TIME
BIN SWITCH
(64)
CAUTION: DISCONNECT POWER BEFORE WORKING
ON ELECTRICAL CIRCUITRY.
DIAGRAM SHOWN DURING FREEZE CYCLE
(60)
CLEAN LIGHT
WATER LEVEL LIGHT
BIN SWITCH LIGHT
HARVEST LIGHT/
SAFETY LIMIT CODE LIGHT
(68)
ICE
(69)
OFF
CLEAN
(62)
(62)
(63)
(65)
2
4
3
1
5
TRANS.
1C
1F
1G
FUSE (7A)
LOW D.C.
VOLTAGE
PLUG
(67)
(66)
TOGGLE SWITCH
(61)
(57)
(58)
(56)
66
62
(21)(20)
WATER
VALVE
RH HARVEST
SOLENOID
(88)
(77)
LH HARVEST
SOLENOID
(76)
DUMP
SOLENOID
(98)(99)
WATER
PUMP
(59)
TERMINATES AT
PIN CONNECTION
CONTACTOR
COIL
VIEW FOR WIRING
68
67
69
(22)
(81)
(80)
(87)
(75)
N - 50HZ
ONLY
L2L3
T2
T3
COMPRESSOR
L1
CONTACTOR
CONTACTS
T1
(51)
(95)
(85)
FAN CYCLE CONTROL
CRANKCASE HEATER
NOTE: WIRE (96) IS NOT USED ON 50HZ
FAN MOTOR
(AIR COOLED ONLY)
(86)
RUN CAPACITOR**
(94)
(96)
SV3008
6-28
Part No. 80-1100-3
Page 81
Section 6Electrical System
0
0
0
0
0
0
Q450/Q600/Q800/Q1000 - REMOTE - 1 PHASE WITH TERMINAL BOARD
TB35
L1
HIGH PRES
CUTOUT
ICE THICKNESS PROBE
WATER LEVEL PROBE
TB32
CAUTION: DISCONNECT POWER BEFORE WORKING
NOT USED
(64)
(66)
ON ELECTRICAL CIRCUITRY.
DIAGRAM SHOWN DURING FREEZE CYCLE
(55)
2
4
1
3
5
TRANS.
FUSE (7A)
1C
1F
LOW D.C.
1G
VOLTAGE
PLUG
(62)
(63)
BIN SWITCH
(65)
(67)
(66)
(20)
TOGGLE SWITCH
(68)
(69)
CLEAN
(62)
SEE SERIAL PLATE FOR VOLTAGE
(61)
(60)
(57)
TB31
(58)
TB37
CLEAN LIGHT
WATER LEVEL LIGHT
BIN SWITCH LIGHT
HARVEST LIGHT/
SAFETY LIMIT CODE LIGHT
ICE
INTERNAL WORKING
OFF
VIEW
HPR
SOLENOID
(77)
HARVEST
SOLENOID
(76)
DUMP
SOLENOID
(98)
(59)
(73)
(56)
(22)(21)
WATER
VALVE
(79)(78)
(80)
(81)
WATER
PUMP
(83)
LIQUID LINE
SOLENOID
CONTACTOR
COIL
VIEW FOR WIRING
66
62
(99)
68
67
69
(82)
(74)
(75)
L2 (N)
TB3
TB3
TB3
TB3
(49)
TB35
(42)
CONTACTOR
CONTACTS
L1
TB33
(51)
COMPRESSOR
R
*OVERLOAD
(48)(45)
(52)
TERMINATES AT
PIN CONNECTION
(F1)
S
C
(53)
(47)
TB34
RUN CAPACITOR
(46)
PTCR
REMOTE
FAN MOTOR
RUN CAPACITOR
R
R
REMOTE CONDENSER
(50)
(F2)
TB3
TB3
SV1648
Part No. 80-1100-36-29
Page 82
Electrical SystemSection 6
)
Q450/Q600/Q800/Q1000 - REMOTE - 1 PHASE WITHOUT TERMINAL BOARD
CAUTION: DISCONNECT POWER BEFORE WORKING
ON ELECTRICAL CIRCUITRY.
L1
(89)
HIGH PRES
CUTOUT
(88)
(42)
ICE THICKNESS PROBE
WATER LEVEL PROBE
AUCS DISPENSE TIME
BIN SWITCH
(64)
DIAGRAM SHOWN DURING FREEZE CYCLE
(55)
2
4
1
3
5
TRANS.
FUSE (7A)
1C
1F
1G
(62)
(63)
(65)
LOW D.C.
VOLTAGE
PLUG
TOGGLE SWITCH
(67)
(66)
(68)
(69)
(62)
(20)(21)
(61)
(60)
CLEAN LIGHT
WATER LEVEL LIGHT
BIN SWITCH LIGHT
HARVEST LIGHT/
SAFETY LIMIT CODE LIGHT
ICE
OFF
CLEAN
(57)
VIEW FOR WIRING
66
62
SEE SERIAL PLATE FOR VOLTAGE
(22)
WATER
HPR
SOLENOID
(78)(79)
(88)(80)
HARVEST
SOLENOID
(77)
DUMP
SOLENOID
(98)
(59)(83)(82)
(58)
(56)
68
67
69
VALVE
(81)
(99)
WATER
PUMP
LIQUID LINE
SOLENOID
CONTACTOR
COIL
(74)
L2 (N
(75)
6-30
CONTACTOR
CONTACTS
L1
(48)
(51)
*OVERLOAD
COMPRESSOR
C
(49)
RUN CAPACITOR
SR
F1F2
(47)
(46)
PTCR
REMOTE
FAN MOTOR
RUN CAPACITOR**
RR
(45)
REMOTE CONDENSER
(50)
(94)
SV2073
Part No. 80-1100-3
Page 83
Section 6Electrical System
Q800/Q1000 -REMOTE - 3 PHASE WITH TERMINAL BOARD
SEE SERIAL PLATE FOR VOLTAGE
L3 L2 L1
TB35
ICE THICKNESS PROBE
WATER LEVEL PROBE
AUCS DISPENSE TIME
HIGH PRES
CUTOUT
(64)
CAUTION: DISCONNECT POWER BEFORE WORKING
ON ELECTRICAL CIRCUITRY.
DIAGRAM SHOWN DURING FREEZE CYCLE
TB32
2
4
1
(65)
3
5
TRANS.
FUSE (7A)
1C
1F
1G
LOW D.C.
VOLTAGE
PLUG
TOGGLE SWITCH
(67)
(66)
(55)
(62)
(63)
BIN SWITCH
(68)
(69)
(62)
(20)
(61)
(60)
(57)
TB31
(58)
TB37
CLEAN LIGHT
WATER LEVEL LIGHT
BIN SWITCH LIGHT
HARVEST LIGHT/
SAFETY LIMIT CODE LIGHT
ICE
INTERNAL WORKING
OFF
VIEW
CLEAN
(21)
HPR
SOLENOID
(78)
(77)
HARVEST
SOLENOID
(76)
DUMP
SOLENOID
(98)
(59)
(73)
(56)
(22)
WATER
VALVE
(79)
(80)
(81)
(99)
WATER
PUMP
(83)
CONTACTOR
COIL
VIEW FOR WIRING
66
62
LIQUID LINE
SOLENOID
68
67
(82)
(74)
69
(75)
TB30
TB30
TB30
TB30
(53)
(96)
TB34
REMOTE
FAN MOTOR
RUN CAPACITOR
(F2)
(42)
L1
CONTACTOR
CONTACTS
COMPRESSOR
TB35
TB33
L2
L3
T2
T3
T1
(52)
(F1)
TERMINATES AT
PIN CONNECTION
REMOTE CONDENSER
TB30
TB30
SV1649
Part No. 80-1100-36-31
Page 84
Electrical SystemSection 6
Q800/Q1000 -REMOTE - 3 PHASE WITHOUT TERMINAL BOARD
SEE SERIAL PLATE FOR VOLTAGE
L3 L2 L1
(89)
HIGH PRES
CUTOUT
(88)
(42)
ICE THICKNESS PROBE
WATER LEVEL PROBE
(55)
NOT USED
BIN SWITCH
(64)
CAUTION: DISCONNECT POWER BEFORE WORKING
ON ELECTRICAL CIRCUITRY.
DIAGRAM SHOWN DURING FREEZE CYCLE
2
4
3
1
5
TRANS.
FUSE (7A)
1C
1F
LOW D.C.
1G
VOLTAGE
PLUG
(62)
(63)
(65)
TOGGLE SWITCH
(67)
(66)
(68)
(69)
(62)
CLEAN
(60)
ICE
OFF
(20)
(61)
(57)
(58)
(56)
CLEAN LIGHT
WATER LEVEL LIGHT
BIN SWITCH LIGHT
HARVEST LIGHT/
SAFETY LIMIT CODE LIGHT
INTERNAL WORKING
VIEW
HPR
SOLENOID
(77)
HARVEST
SOLENOID
(76)
DUMP
SOLENOID
(98)
WATER
PUMP
(59)
(21)
(78)
(83)
(22)
WATER
VALVE
(79)
(80)
(81)
(75)
(99)
(82)
LIQUID LINE
SOLENOID
CONTACTOR
COIL
(74)
VIEW FOR WIRING
66
62
68
67
69
L2
L3
T3
COMPRESSOR
6-32
(85)
L1
CONTACTOR
CONTACTS
T2
T1
(51)
(F2)
REMOTE
FAN MOTOR
RUN CAPACITOR
REMOTE CONDENSER
(F1)
SV2074
Part No. 80-1100-3
Page 85
Section 6Electrical System
0
0
0
0
0
0
Q1300/Q1800 - REMOTE - 1 PHASE WITH TERMINAL BOARD
TB35
L1
HIGH PRES
CUTOUT
ICE THICKNESS PROBE
WATER LEVEL PROBE
CAUTION: DISCONNECT POWER BEFORE WORKING
TB32
AUCS DISPENSE TIME
(55)
(64)
(66)
ON ELECTRICAL CIRCUITRY.
DIAGRAM SHOWN DURING FREEZE CYCLE
2
4
1
3
5
TRANS.
FUSE (7A)
1C
1F
1G
LOW D.C.
VOLTAGE
PLUG
(62)
(63)
BIN SWITCH
(65)
(67)
(66)
TOGGLE SWITCH
(68)
(69)
(62)
(20)
(61)
(60)
CLEAN LIGHT
WATER LEVEL LIGHT
BIN SWITCH LIGHT
HARVEST LIGHT/
SAFETY LIMIT CODE LIGHT
ICE
OFF
CLEAN
(21)
RH HARVEST
SOLENOID
(57)
(58)
INTERNAL WORKING
VIEW
LH HARVEST
SOLENOID
TB31
TB37
SEE SERIAL PLATE FOR VOLTAGE
WATER
VALVE
HPR
SOLENOID
(77)
(76)
DUMP
SOLENOID
(98)
(59)
(73)
(56)
(83)
(22)
(79)(78)
(87)(88)
(80)
(81)
WATER
PUMP
CONTACTOR
COIL
VIEW FOR WIRING
66
62
(75)
(99)
(82)
LIQUID LINE
SOLENOID
(74)
68
67
69
L2 (N)
TB3
TB3
TB3
TB3
TB35
TB35
(42)
CONTACTOR
CONTACTS
L1
TB33
(51)
(48)
(52)
*OVERLOAD
TERMINATES AT
PIN CONNECTION
(F1)
CRANKCASE HEATER
COMPRESSOR
R
C
(49)
(47)
S
(53)
TB34
RUN CAPACITOR
(46)
PTCR
FAN MOTOR
RUN CAPACITOR
(44)
REMOTE
R
(45)
(94)(95)
R
(50)
(F2)
REMOTE CONDENSER
CONTACTOR
CONTACTS
L2
(96)
SV1650
TB3
TB3
Part No. 80-1100-36-33
Page 86
Electrical SystemSection 6
Q1300/Q1600/Q1800 - REMOTE - 1 Phase Without Terminal Board
ON ELECTRICAL CIRCUITRY.
DIAGRAM SHOWN DURING FREEZE CYCLE
L1
(55)(89)
HIGH PRES
CUTOUT
(88)
ICE THICKNESS PROBE
WATER LEVEL PROBE
AUCS DISPENSE TIME
BIN SWITCH
(64)
(62)
(63)
(65)
2
4
1
3
5
TRANS.
FUSE (7A)
1C
1F
1G
LOW D.C.
VOLTAGE
PLUG
(67)
(66)
TOGGLE SWITCH
(68)
(69)
(62)
ICE
OFF
CLEAN
(61)
(60)
(57)
CLEAN LIGHT
WATER LEVEL LIGHT
BIN SWITCH LIGHT
HARVEST LIGHT/
SAFETY LIMIT CODE LIGHT
INTERNAL WORKING
VIEW
SEE SERIAL PLATE FOR VOLTAGECAUTION: DISCONNECT POWER BEFORE WORKING
(21)(20)
HPR
SOLENOID
RH HARVEST
SOLENOID
(77)
LH HARVEST
SOLENOID
DUMP
SOLENOID
TB37
(59)
(58)
(56)
(78)
(88)
(76)
(98)
(83)
CONTACTOR
COIL
(22)
WATER
VALVE
(79)
(87)
(80)
(75)
(81)
(99)
WATER
PUMP
(82)
LIQUID LINE
SOLENOID
VIEW FOR WIRING
68
66
62
67
69
L2 (N)
(74)
6-34
(42)
CONTACTOR
CONTACTS
L1
(95)
*OVERLOAD
(48)
(51)
CRANKCASE HEATER
COMPRESSOR
RS
C
(F1)(F2)
(49)
(47)
PTCR
(44)
REMOTE
FAN MOTOR
RUN CAPACITOR
RUN CAPACITOR
(46)(50)
(94)
RR
(45)
REMOTE CONDENSER
(F2)
CONTACTOR
CONTACTS
(96)
L2
Part No. 80-1100-3
SV2076
Page 87
Section 6Electrical System
Z
Q1300/Q1800 - REMOTE - 3 PHASE WITH TERMINAL BOARD
SEE SERIAL PLATE FOR VOLTAGE
L3 L2 L1
TB35
TB32
HIGH PRES
CUTOUT
ICE THICKNESS PROBE
WATER LEVEL PROBE
AUCS DISPENSE TIME
(64)
(66)
CAUTION: DISCONNECT POWER BEFORE WORKING
BIN SWITCH
ON ELECTRICAL CIRCUITRY.
DIAGRAM SHOWN DURING FREEZE CYCLE
2
4
1
(65)
3
5
TRANS.
1C
1F
1G
FUSE (7A)
LOW D.C.
VOLTAGE
PLUG
(67)
(66)
TOGGLE SWITCH
(68)
(69)
(62)
(55)
(62)
(63)
(20)
RH HARVEST
(61)
(60)
ICE
OFF
CLEAN
SOLENOID
(57)
(58)
TB37
CLEAN LIGHT
WATER LEVEL LIGHT
BIN SWITCH LIGHT
HARVEST LIGHT/
SAFETY LIMIT CODE LIGHT
INTERNAL WORKING
VIEW
(21)
HPR
SOLENOID
(77)
LH HARVEST
SOLENOID
(76)
DUMP
SOLENOID
TB31
(98)
(59)
(73)
(56)
(78)
(88)
(83)
CONTACTOR
COIL
VIEW FOR WIRING
66
62
WATER
VALVE
(79)
(87)
(80)
(81)
WATER
PUMP
LIQUID LINE
SOLENOID
(99)
68
67
(82)
(74)
69
(75)
(22)
N - 50H
ONLY
TB30
TB30
TB30
TB30
TB30
CRANKCASE HEATER
(96)
(53)
TB34
REMOTE CONDENSER
REMOTE
FAN MOTOR
RUN CAPACITOR
(94)
TB30
TB30
(F2)
L2L3
T3
L1
T2
COMPRESSOR
T1
TB35
(42)
TB35
CONTACTOR
CONTACTS
(95)
NOTE: WIRE (96) IS NOT USED ON 50HZ
(F1)
TB33(52)(51)
TERMINATES AT
PIN CONNECTION
SV1651
Part No. 80-1100-36-35
Page 88
Electrical SystemSection 6
Z
Y
Q1300/Q1600/Q1800 - REMOTE - 3 PHASE WITHOUT TERMINAL BOARD
SEE SERIAL PLATE FOR VOLTAGE
L3 L2 L1
(55)(89)
HIGH PRES
CUTOUT
(88)
(42)
ICE THICKNESS PROBE
WATER LEVEL PROBE
NOT USED
BIN SWITCH
(64)
CAUTION: DISCONNECT POWER BEFORE WORKING
ON ELECTRICAL CIRCUITRY.
DIAGRAM SHOWN DURING FREEZE CYCLE
2
4
3
1
5
TRANS.
FUSE (7A)
1C
1F
LOW D.C.
1G
VOLTAGE
PLUG
(62)
(63)
(65)
TOGGLE SWITCH
(67)
(66)
(68)
(69)
(62)
(20)
(61)
(60)
CLEAN LIGHT
WATER LEVEL LIGHT
BIN SWITCH LIGHT
HARVEST LIGHT/
SAFETY LIMIT CODE LIGHT
ICE
OFF
CLEAN
HPR
SOLENOID
LH HARVEST
SOLENOID
(77)
RH HARVEST
SOLENOID
(76)
DUMP
SOLENOID
(57)
(58)
(56)
INTERNAL WORKING
VIEW
(98)
(59)
(21)
(78)
(88)
WATER
PUMP
(22)
WATER
VALVE
(79)
(87)
(80)
(75)
(81)
(99)
(82)(83)
LIQUID LINE
SOLENOID
CONTACTOR
COIL
(74)
VIEW FOR WIRING
66
62
N - 50 H
ONL
68
67
69
L2
L3
T3
COMPRESSOR
6-36
T2
L1
CONTACTOR
CONTACTS
T1
(95)(94)
NOTE: WIRE (96) IS NOT USED ON 50HZ
(F1)
(51)
REMOTE CONDENSER
(96)(96)
REMOTE
FAN MOTOR
RUN CAPACITOR
(F2)
SV2077
Part No. 80-1100-3
Page 89
Section 6Electrical System
THIS PAGE INTENTIONALLY LEFT BLANK
Part No. 80-1100-36-37
Page 90
Electrical SystemSection 6
Component Specifications and Diagnostics
MAIN FUSE
Function
The control board fuse stops ice machine operation if
electrical components fail causing high amp draw.
Specifications
The main fuse is 250 Volt, 7 amp.
Check Procedure
!
Warning
High (line) voltage is applied to the control board
(terminals #55 and #56) at all times. Removing the
control board fuse or moving the toggle switch to
OFF will not remove the power supplied to the
control board.
1. If the bin switch light is on with the water curtain
closed, the fuse is good.
Warning
!
Disconnect electrical power to the entire ice
machine before proceeding.
2. Remove the fuse. Check the resistance across the
fuse with an ohm meter.
BIN SWITCH
Function
Movement of the water curtain controls bin switch
operation. The bin switch has two main functions:
1. Terminating the harvest cycle and returning the ice
machine to the freeze cycle.
This occurs when the bin switch is opened and
closed again within 7 seconds during the harvest
cycle.
2. Automatic ice machine shut-off.
If the storage bin is full at the end of a harvest cycle,
the sheet of cubes fails to clear the water curtain
and holds it open. After the water curtain is held
open for 7 seconds, the ice machine shuts off. The
ice machine remains off until enough ice is removed
from the storage bin to allow the sheet of cubes to
drop clear of the water curtain. As the water curtain
swings back to the operating position, the bin switch
closes and the ice machine restarts, provide the
three-minute delay has expired.
Important
The water curtain must be ON (bin switch(s) closed)
to start ice making.
ReadingResult
Open (OL)Replace fuse
Closed (O)Fuse is good
Specifications
The bin switch is a magnetically operated reed switch.
The magnet is attached to the lower right corner of the
water curtain. The switch is attached to the evaporatormounting bracket.
The bin switch is connected to a varying D.C. voltage
circuit. (Voltage does not remain constant.)
NOTE: Because of a wide variation in D.C. voltage, it is
not recommended that a voltmeter be used to check bin
switch operation.
6-38
Part No. 80-1100-3
Page 91
Section 6Electrical System
Check Procedure
1. Set the toggle switch to OFF.
2. Watch the bin switch light on the control board.
3. Move the water curtain toward the evaporator. The
bin switch must close. The bin switch light “on”
indicates the bin switch has closed properly.
Move the water curtain away from the evaporator. The
bin switch must open. The bin switch light “off” indicates
the bin switch has opened properly.
OHM Test
1. Disconnect the bin switch wires to isolate the bin
switch from the control board.
2. Connect an ohmmeter to the disconnected bin
switch wires.
3. Cycle the bin switch open and closed numerous
times by opening and closing the water curtain.
NOTE: To prevent misdiagnosis:
•Always use the water curtain magnet to cycle the
switch (a larger or smaller magnet will affect switch
operation).
Water Curtain Removal Notes
The water curtain must be on (bin switch closed) to start
ice making. While a freeze cycle is in progress, the water
curtain can be removed and installed at any time without
interfering with the electrical control sequence.
If the ice machine goes into harvest sequence while the
water curtain is removed, one of the following will
happen:
•Water curtain remains off:
When the harvest cycle time reaches 3.5 minutes
and the bin switch is not closed, the ice machine
stops as though the bin were full.
•Water curtain is put back on:
If the bin switch closes prior to reaching the 3.5minute point, the ice machine immediately returns to
another freeze sequence prechill.
•Watch for consistent readings when the bin switch is
cycled open and closed (bin switch failure could be
erratic).
Part No. 80-1100-36-39
Page 92
Electrical SystemSection 6
COMPRESSOR ELECTRICAL DIAGNOSTICS
The compressor will not start or will trip repeatedly on
overload.
Check Resistance (Ohm) Values
NOTE: Compressor windings can have very low ohm
values. Use a properly calibrated meter.
Perform the resistance test after the compressor cools.
The compressor dome should be cool enough to touch
(below 120°F/49°C) to assure that the overload is closed
and the resistance readings will be accurate.
SINGLE PHASE COMPRESSORS
1. Disconnect power from the cuber and remove the
wires from the compressor terminals.
2. The resistance values must be within published
guidelines for the compressor. The resistance
values between C and S and between C and R,
when added together, should equal the resistance
value between S and R.
3. If the overload is open, there will be a resistance
reading between S and R, and open readings
between C and S and between C and R. Allow the
compressor to cool, then check the readings again.
THREE PHASE COMPRESSORS
1. Disconnect power from the cuber and remove the
wires from the compressor terminals.
2. The resistance values must be within published
guidelines for the compressor. The resistance
values between L1 and L2, between L2 and L3, and
between L3 and L1 should all be equal.
3. If the overload is open, there will be open readings
between L1 and L2, between L2 and L3, and
between L3 and L1. Allow the compressor to cool,
then check the readings again.
Check Motor Windings to Ground
Check continuity between all three terminals and the
compressor shell or copper refrigeration line. Scrape
metal surface to get good contact. If continuity is
present, the compressor windings are grounded and the
compressor should be replaced.
Determine if the Compressor is Seized
Check the amp draw while the compressor is trying to
start.
COMPRESSOR DRAWING LOCKED ROTOR
The two likely causes of this are:
•Defective starting component
•Mechanically seized compressor
To determine which you have:
1. Install high and low side gauges.
2. Try to start the compressor.
3. Watch the pressures closely.
A. If the pressures do not move, the compressor is
seized. Replace the compressor.
B. If the pressures move, the compressor is turning
slowly and is not seized. Check the capacitors
and start relay.
COMPRESSOR DRAWING HIGH AMPS
The continuous amperage draw on start-up should not
be near the maximum fuse size indicated on the serial
tag.
The voltage when the compressor is trying to start must
be within ±10% of the nameplate voltage.
Diagnosing Capacitors
•If the compressor attempts to start, or hums and trips
the overload protector, check the starting
components before replacing the compressor.
•Visual evidence of capacitor failure can include a
bulged terminal end or a ruptured membrane. Do not
assume a capacitor is good if no visual evidence is
present.
•A good test is to install a known good substitute
capacitor.
•Use a capacitor tester when checking a suspect
capacitor. Clip the bleed resistor off the capacitor
terminals before testing.
6-40
Part No. 80-1100-3
Page 93
Section 6Electrical System
PTCR DIAGNOSTICS
What is a PTCR?
A PTCR (or Positive Temperature Coefficient Resistor) is
made from high-purity, semi-conducting ceramics.
A PTCR is useful because of its resistance versus
temperature characteristic. The PTCR has a low
resistance over a wide (low) temperature range, but
upon reaching a certain higher temperature, its
resistance greatly increases, virtually stopping current
flow. When the source of heat is removed, the PTCR
returns to its initial base resistance.
In severe duty cycles, it can be used to repeatedly switch
(virtually stop) large currents at line voltages.
PTCR’s have been used for many years in millions of
HVAC applications. In place of using the conventional
start relay/start capacitor, a simple PTCR provides the
starting torque assistance to PSC (Permanent Split
Capacitor) single-phase compressors, which can
equalize pressures before starting.
Compressor Start Sequence
PTCR’s provide additional starting torque by increasing
the current in the auxiliary (start) winding during starting.
The PTCR is wired across the run capacitor (in series
with the start winding).
1. It is important for the refrigerant discharge and
suction pressures to be somewhat equalized prior to
the compressor starting. To assure equalization of
pressures the harvest valve (and HPR valve on
remotes) will energize for 45 seconds prior to
compressor starting. The harvest valve (and HPR
valve on remotes) remains on for an additional 5
seconds while the compressor is starting.
2. When starting the compressor, the contactor closes
and the PTCR, which is at a low resistance value,
allows high starting current to flow in the start
winding.
3. The current passing through the PTCR causes it to
rapidly heat up, and after approximately .25-1
second it abruptly “switches” to a very high
resistance, virtually stopping current flow through it.
4. At this point the motor is up to speed and all current
going through the start winding will now pass
through the run capacitor.
5. The PTCR remains hot and at a high resistance as
long as voltage remains on the circuit.
6. It is important to provide time between compressor
restarts to allow the PTCR to cool down to near its
initial temperature (low resistance). When the
contactor opens to stop the compressor, the PTCR
cools down to its initial low resistance and is again
ready to provide starting torque assistance. To
assure the PTCR has cooled down, during an
automatic shut-off, the Q model ice machines have a
built-in 3-minute off time before it can restart.
Part No. 80-1100-36-41
Page 94
Electrical SystemSection 6
Q-Model Automatic Shut-Off and Restart
When the storage bin is full at the end of a harvest cycle,
the sheet of cubes fails to clear the water curtain and will
hold it open. After the water curtain is held open for 7
seconds, the ice machine shuts off. To assure the PTCR
has cooled, the ice machine remains off for 3 minutes
before it can automatically restart.
The ice machine remains off until enough ice has been
removed from the storage bin to allow the ice to fall clear
of the water curtain. As the water curtain swings back to
operating position, the bin switch closes and the ice
machine restarts, provided the three-minute delay period
is complete.
L1
CONTACTOR
CONTACTS
COMPRESSOR
R
C
S
RUN CAPACITOR
RR
PTCR
L2
SV1506
Figure 6-15. During Start-Up (First .25 - 1.0 Seconds)
L1
CONTACTOR
CONTACTS
COMPRESSOR
R
C
S
RUN CAPACITOR
RR
L2
Troubleshooting PTCR’s
WHY A GOOD PTCR MAY FAIL
TO START THE COMPRESSOR
The PTCR must be cooled before attempting to start the
compressor, otherwise the high starting torque may not
last long enough.
For example, if the PTCR is properly cooled, say 60°F
(15.6°C) when the compressor starts, it will take .25 to
1.0 seconds before its temperature reaches 260°F
(126.6°C), and current flow is stopped.
If the PTCR is still warm, say 160°F (71.1°C) when the
compressor starts, it will take only .125 to .50 seconds
before its temperature reaches 260°F (126.6°C), and
current flow is stopped. This decreased time may be
insufficient to start the compressor.
A good PTCR may be too hot to operate properly at
start-up because:
•The ice machine’s 3-minute delay has been
overridden. Opening and closing the service
disconnect or cycling the toggle switch from OFF to
ICE will override the delay period.
•The control box temperature is too high. Though rare,
very high air temperatures (intense sunlight, etc.) can
greatly increase the temperature of the control box
and its contents. This may require a longer off time to
allow the PTCR to cool.
•The compressor has short-cycled, or the compressor
overload has opened. Move the toggle switch to OFF
and allow the compressor and PTCR to cool.
Continued on next page …
Figure 6-16. After Start-Up
(Current Flows Through Run Capacitor)
6-42
PTCR
SV1507
Part No. 80-1100-3
Page 95
Section 6Electrical System
There are other problems that may cause compressor
start-up failure with a good PTCR in a new, properly
wired ice machine.
•The voltage at the compressor during start-up is too
low.
Manitowoc ice machines are rated at ±10% of
nameplate voltage at compressor start-up. (Ex: An
ice machine rated at 208-230 should have a
compressor start-up voltage between 187 and 253
volts.)
•The compressor discharge and suction pressures
are not matched closely enough or equalized.
These two pressures must be somewhat equalized
before attempting to start the compressor. The
harvest valve (and HPR valve on remotes) energizes
for 45 seconds before the compressor starts, and
remains on 5 seconds after the compressor starts.
Make sure this is occurring and the harvest valve
(and HPR solenoid) coil is functional before
assuming that the PTCR is bad.
CHECKING THE PTCR
Model
Q200
Q280
Q320
Q420
Q450
Q600
Q800
Q1000
Q1300
Q1600
Q1800
Manitowoc
Part Number
8505003305C2022-50 Ohms
8504993305C1918-40 Ohms
8504913305C98-22 Ohms
Cera-Mite
Part Number
Room
Temperature
Resistance
Warning
!
Disconnect electrical power to the entire ice
machine at the building electrical disconnect box
before proceeding.
1. Visually inspect the PTCR. Check for signs of
physical damage.
NOTE: The PTCR case temperature may reach 210°F
(100°C) while the compressor is running. This is normal.
Do not change a PTCR just because it is hot.
2. Wait at least 10 minutes for the PTCR to cool to
room temperature.
3. Remove the PTCR from the ice machine.
4. Measure the resistance of the PTCR as shown
below. If the resistance falls outside of the
acceptable range, replace it.
SV1540
Figure 6-17. Manitowoc PTCR’s 8505003 & 8504993
SV1541
Figure 6-18. Manitowoc PTCR 8504913
Part No. 80-1100-36-43
Page 96
Electrical SystemSection 6
ICE/OFF/CLEAN TOGGLE SWITCH
Function
The switch is used to place the ice machine in ICE, OFF
or CLEAN mode of operation.
Specifications
Double-pole, double-throw switch. The switch is
connected into a varying low D.C. voltage circuit.
Check Procedure
NOTE: Because of a wide variation in D.C. voltage, it is
not recommended that a volt meter be used to check
toggle switch operation.
1. Inspect the toggle switch for correct wiring.
2. Isolate the toggle switch by disconnecting all wires
from the switch, or by disconnecting the Molex
connector and removing wire #69 from the toggle
switch.
3. Check across the toggle switch terminals using a
calibrated ohm meter. Note where the wire numbers
are connected to the switch terminals, or refer to the
wiring diagram to take proper readings.
CONTROL BOARD RELAYS
Function
The control board relays energize and de-energize
system components.
Specifications
Relays are not field replaceable. There are five relays on
the control board:
4. Replace the toggle switch if ohm readings do not
match all three switch settings.
6-44
Part No. 80-1100-3
Page 97
Section 6Electrical System
ELECTRONIC CONTROL BOARD
AC LI NE VOLTAGE
ELECTRICAL
PLUG (NUMBERS
MARKED ON
WIRES)
CLEAN LIGHT
YELLOW
WATER LEVEL
PROBE LIGHT
GREEN
MAIN FUSE (7A)
BIN SWITCH
LIGHT GREEN
AUTOM ATIC
CLEANING
SYSTEM (AuCS)
ACCESSORY PLUG
ICE THICKNESS
PROBE (3/16''
CONNECTION)
WATER LEVEL
PROBE
JUMPER USED
ON Q1300/Q1600/
Q1800 ONLY
DC LOW VOLTAGE
ELECTRICAL PLUG
(NUMBERS
MARKED ON
WIRES)
HARVEST LIGHT/
SAFETY LIMIT
CODE LIGHT
RED
1C
1F
1G
67
62
63
68
65
SV1588
Figure 6-19. Control Board
Part No. 80-1100-36-45
Page 98
Electrical SystemSection 6
General
Q-Model control boards use a dual voltage transformer.
This means only one control board is needed for both
115V and 208-230V use.
Safety Limits
In addition to standard safety controls, such as the high
pressure cut-out, the control board has built-in safety
limits.
These safety limits protect the ice machine from major
component failures. For more information, see “Safety
Limits” on Page 7-13.
Inputs
The control board, along with inputs, controls all
electrical components, including the ice machine
sequence of operation. Prior to diagnosing, you must
understand how the inputs affect the control board
operation.
Refer to specific component specifications (inputs),
wiring diagrams and ice machine sequence of operation
sections for details.
As an example, refer to “Ice Thickness Probe” on the
next page for information relating to how the probe and
control board function together.
This section will include items such as:
•How a harvest cycle is initiated
•How the harvest light functions with the probe
•Freeze time lock-in feature
•Maximum freeze time
•Diagnosing ice thickness control circuitry
6-46
Part No. 80-1100-3
Page 99
Section 6Electrical System
Ice Thickness Probe (Harvest Initiation)
HOW THE PROBE WORKS
Manitowoc’s electronic sensing circuit does not rely on
refrigerant pressure, evaporator temperature, water
levels or timers to produce consistent ice formation.
As ice forms on the evaporator, water (not ice) contacts
the ice thickness probe. After the water completes this
circuit across the probe continuously for 6-10 seconds, a
harvest cycle is initiated.
SV1730A
Figure 6-20. Ice Thickness Probe
HARVEST/SAFETY LIMIT LIGHT
This light’s primary function is to be on as water contacts
the ice thickness probe during the freeze cycle, and
remain on throughout the entire harvest cycle. The light
will flicker as water splashes on the probes.
The light’s secondary function is to continuously flash
when the ice machine is shut off on a safety limit, and to
indicate which safety limit shut off the ice machine.
FREEZE TIME LOCK-IN FEATURE
The ice machine control system incorporates a freeze
time lock-in feature. This prevents the ice machine from
short cycling in and out of harvest.
The control board locks the ice machine in the freeze
cycle for six minutes. If water contacts the ice thickness
probe during these six minutes, the harvest light will
come on (to indicate that water is in contact with the
probe), but the ice machine will stay in the freeze cycle.
After the six minutes are up, a harvest cycle is initiated.
This is important to remember when performing
diagnostic procedures on the ice thickness control
circuitry.
To allow the service technician to initiate a harvest cycle
without delay, this feature is not used on the first cycle
after moving the toggle switch OFF and back to ICE.
MAXIMUM FREEZE TIME
The control system includes a built-in safety which will
automatically cycle the ice machine into harvest after 60
minutes in the freeze cycle.
ICE THICKNESS CHECK
The ice thickness probe is factory-set to maintain the ice
bridge thickness at 1/8" (3.2 mm).
NOTE: Make sure the water curtain is in place when
performing this check. It prevents water from splashing
out of the water trough.
1. Inspect the bridge connecting the cubes. It should
be about 1/8" (3.2 mm) thick.
2. If adjustment is necessary, turn the ice thickness
probe adjustment screw clockwise to increase
bridge thickness, or counterclockwise to decrease
bridge thickness.
NOTE: Turning the adjustment 1/3 of a turn will change
the ice thickness about 1/16" (1.5 mm).
ADJUSTING SCREW
1/8” ICE BRIDGE THICKNESS
SV1208
Figure 6-21. Ice Thickness Check
Make sure the ice thickness probe wire and the bracket
do not restrict movement of the probe.
Ice Thickness Probe Cleaning
1. Mix a solution of Manitowoc ice machine cleaner
and water (2 ounces of cleaner to 16 ounces of
water) in a container.
2. Soak ice thickness probe in container of cleaner/
water solution while disassembling and cleaning
water circuit components (soak ice thickness probe
for 10 minutes or longer).
3. Clean all ice thickness probe surfaces including all
plastic parts (do not use abrasives). Verify the ice
thickness probe cavity is clean. Thoroughly rinse ice
thickness probe (including cavity) with clean water,
then dry completely. Incomplete rinsing and
drying of the ice thickness probe can cause
premature harvest.
4. Reinstall ice thickness probe, then sanitize all ice
machine and bin/dispenser interior surfaces.
Part No. 80-1100-36-47
Page 100
Electrical SystemSection 6
DIAGNOSING ICE THICKNESS CONTROL CIRCUITRY
Ice Machine Does Not Cycle Into Harvest When Water Contacts The Ice Thickness Control Probe
Step 1 Bypass the freeze time lock-in feature by moving the ICE/OFF/CLEAN switch to OFF and back to ICE. Wait
until the water starts to flow over the evaporator.
Step 2 Clip the jumper wire leads to the ice thickness probe and any cabinet ground.
ICE THICKNESS PROBE
EVAPORATOR
GROUND
JUMPER WIRE
CLEAN LIGHT
WATER LEVEL LIGHT
BIN SWITCH LIGHT
HARVEST/SAFETY LIMIT LIGHT
SV1588ASV3010
Figure 6-22. Step 2
Step 2 Jumper wire connected from probe to ground
Monitoring of Harvest LightCorrection
The harvest light comes on, and 6-10 seconds later, ice
machine cycles from freeze to harvest.
The harvest light comes on but the ice machine stays in the
freeze sequence.
The ice thickness control circuitry is functioning properly. Do
not change any parts.
The ice thickness control circuitry is functioning properly. The
ice machine is in a six-minute freeze time lock-in. Verify step 1
of this procedure was followed correctly.
The harvest light does not come on.Proceed to Step 3, below.
Step 3 Disconnect the ice thickness probe from the control board at terminal 1C. Clip the jumper wire leads to
terminal 1C on the control board and any cabinet ground. Monitor the harvest light.
EVAPORATOR
ICE THICKNESS PROBE
JUMPER WIRE
1C
GROUND
SV3011SV1588G
CLEAN LIGHT
WATER LEVEL LIGHT
BIN SWITCH LIGHT
HARVEST/SAFETY LIMIT LIGHT
Figure 6-23. Step 3
Step 3 Jumper wire connected from control board terminal 1C to ground
Monitoring of Harvest LightCorrection
The harvest light comes on, and 6-10 seconds later, ice
The ice thickness probe is causing the malfunction.
machine cycles from freeze to harvest.
The harvest light comes on but the ice machine stays in the
freeze sequence.
The control circuitry is functioning properly. The ice machine is
in a six-minute freeze time lock-in (verify step 1 of this
procedure was followed correctly).
The harvest light does not come on.The control board is causing the malfunction.
6-48
Part No. 80-1100-3
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