Howe Rapid Freeze 1000-RLE-CO2DX Supplement

Howe Corporation
Phone: [phone]
Fax: [phone]
1650 North Elston Avenue
Website: www.howecorp.com
Chicago, IL 60642-1585
Email: [e-mail]
Rapid Freeze®Ice Flaker
Installation & Service Manual
For Use with Parallel Compressor Rack System
1000-RLE-CO2DX
2000-RLE-CO2DX

2
ENGINEERING GUIDELINES .................................................................................................................3
Location Requirements ........................................................................................................................................................... 3
Electrical Requirements........................................................................................................................................................... 3
Water Supply Requirements.................................................................................................................................................... 3
Drain Water Piping Requirements ........................................................................................................................................... 4
Refrigeration Requirements .................................................................................................................................................... 5
Piping Table............................................................................................................................................................................. 7
Refrigerant Pipework .............................................................................................................................................................. 7
Refrigerant Pipework Insulation Requirements ....................................................................................................................... 7
FIELD INSTALLATION ..........................................................................................................................8
Safety Information and Guidelines .......................................................................................................................................... 8
Inspection ............................................................................................................................................................................... 8
Piping ...................................................................................................................................................................................... 8
Field Wiring ............................................................................................................................................................................. 9
Leak Testing ............................................................................................................................................................................ 9
Evacuation .............................................................................................................................................................................. 9
Installation Checklist ..............................................................................................................................................................10
START UP AND OPERATION ..............................................................................................................11
Water Operation ....................................................................................................................................................................11
Refrigerant Operation ............................................................................................................................................................14
Electrical Operation................................................................................................................................................................16
Mechanical Operation ............................................................................................................................................................21
Preventative Maintenance Schedule ......................................................................................................................................28
Cleaning Procedure ................................................................................................................................................................29
Sanitizing Procedure...............................................................................................................................................................30
Lubrication .............................................................................................................................................................................31
Water Filtration......................................................................................................................................................................32
Electronic Valve Settings ........................................................................................................................................................21
TROUBLESHOOTING.........................................................................................................................34
APPENDIX........................................................................................................................................37

Engineering Guidelines
3
Engineering Guidelines
Location Requirements
Howe Rapid Freeze Ice Flakers are designed to
operate in ambient room temperatures
between 50°F (10°C) and 100°F (38°C).
Minimum Ambient
Temperature
Maximum Ambient
Temperature
50°F (10°C)
100°F (38°C)
The Ice Flaker warranty is void if it is installed
in ambient room temperatures below 50°F
(10°C).
The Ice Flaker must be located above a sanitary
sewer floor drain hub or trench drain to ensure
proper drainage to the floor.
If installing the Ice Flaker with a Howe Ice Bin,
ensure that the bin is adequately secured to
the floor so as to prevent the assembly from
tipping when empty.
Many designers slope floors to the sanitary
sewer inlets to manage these wet areas.
Electrical Requirements
A dedicated 15 amp, 2 pole, 208-230 volt power
supply from a field furnished and installed
disconnect switch is required for each Ice
Flaker.
Water Supply Requirements
Cold water supply to the Ice Flaker must be
totally separate and unaffected by any local hot
water supply.
This cold water supply must be within the range
of 45°F (7°C) to 90°F (32°C).
Minimum Water
Supply Temp.
Maximum Water
Supply Temp.
45°F (7°C)
90°F (32°C)
The cold water supply pressure must be within
a 20 PSIG (140 kPa) to 60 PSIG (410 kPa) range.
Minimum Water
Pressure
Maximum Water
Pressure
20 PSIG (140 kPa)
60 PSIG (410 kPa)
Straight Reverse Osmosis (RO) treated water
should never be supplied to the Ice Flaker.
THE INFORMATION FOUND IN THIS MANUAL IS INTENDED FOR USE BY INDIVIDUALS POSSESSING
EXPERIENCED BACKGROUNDS IN ELECTRICAL, REFRIGERATION AND MECHANICAL REPAIR AND
MAINTENANCE. ANY ATTEMPT TO REPAIR OR ALTER THIS EQUIPMENT MAY RESULT IN PERSONAL
INJURY OR PROPERTY DAMAGE. THE MANUFACTURER IS NOT RESPONSIBLE FOR THE INTERPRETATION
OF THE INFORMATION CONTAINED HEREIN, NOR HAS THE MANUFACTURER ASSUMED ANY LIABILITY IN
CONNECTION WITH ITS USE.
THE MANUFACTURER IS NOT RESPONSIBLE FOR ANY LOSS, DAMAGE OR INJURY CAUSED AS A RESULT
OF EITHER (I) ANY REPAIR OR REPLACEMENT TO THE MANUFACTURER’S EQUIPMENT THAT IS DONE BY
A THIRD PARTY NOT PREVIOUSLY APPROVED BY THE MANUFACTURER, OR (II) ANY REPAIR OR SERVICE
WORK PERFORMED ON ANY OF THE MANUFACTURER’S EQUIPMENT WHICH DOES NOT STRICTLY
FOLLOW THE PROCEDURES SET FORTH HEREIN.
THE KIND OF REFRIGERANT EMPLOYED IN THE SYSTEM SHALL COMPLY WITH THE STANDARD
FOR REFRIGERANTS UL 2182.
IMPORTANT

4
Engineering Guidelines
RO system treated water is aggressive toward
metals and plated surfaces. In addition RO
water will affect the life and integrity of rubber
and plastic material Ice Flaker components. If
only RO water is available, Post-RO treatment
must be provided to raise pH and mineral
content.
Generally, filtration of cold supply water is
recommended. Howe offers a complete line of
replaceable core cartridge filter treatment
systems designed to improve ice quality and
extend the life of the Ice Flaker.
This filtration will also reduce supply water
related service problems if changed at least
every six months or depending upon local water
conditions.
A dedicated 1/2” ODS copper cold water supply
should be located within 4 feet of the Ice Flaker
complete with hand shut off valve.
A 3/8” OD copper tube should connect the field
installed shut off valve with the Ice Flaker water
inlet connection located at the rear of the
machine.
Drain Water Piping Requirements
The Drain Water Piping figure above illustrates
the recommended piping to a floor sanitary
sewer hub or trench drain. The two vertical
pipe drops should drain water through an
indirect water connection with an “Air Gap”.
Code authorities having jurisdiction may dictate
other indirect water connection requirements.
The figure depicts two separate drain lines
which are required to ensure the Ice Flaker
does not inadvertently flow Water Sump Drain
water into the Ice Bin or Carts in the event of a
backup or any other malfunction.

Engineering Guidelines
5
Refrigeration Requirements
Model Refrigeration Requirements* Optimum Evaporator Temperature
1000-RLE-CO2DX
9,500 BTU/hr (2.78 kW)
0°F (-17.8°C)
2000-RLE-CO2DX
18,000 BTU/hr (5.28 kW)
-5°F (-20.5°C)
*Refrigeration requirements are based on operating the Ice Flaker with 70°F (21°C) supply water and 90°F (32°C) ambient air
conditions. Refrigeration requirements and/or capacity will vary with temperatures outside these conditions.
Parallel Compressor Rack Systems
The design saturated evaporator temperature
of the Ice Flaker requires connection to a low
temperature remote parallel compressor rack
system, or Rack.
The liquid and suction header refrigeration load
station stubs serving the Ice Flaker should be
equipped with ball shut-off valves only.
No suction pressure regulating valve of any type
should be assigned to the Ice Flaker at the Rack
or suction line branch. If a liquid line solenoid is
installed at the rack or on a liquid line branch
feeding the Ice Flaker, it must be a type which
allows backwards flow to prevent liquid
trapping between the valve and the Ice Flaker.
The Ice Flaker has its own liquid line solenoid to
prevent flooding of the evaporator when the Ice
Flaker is off. The Ice Flaker liquid line solenoid
valve as well as an Electronic Expansion Valve
(EEV) and the appropriate Electric Evaporator
Pressure Regulator (EEPR) valve come installed
at the flaker with their own pre-programmed
controls.
The Ice Flaker should always be assigned to the
liquid header station closest to the main liquid
feed from the refrigerant receiver. An alternate
solution is to install a 1/2” liquid stub directly
teed from the main liquid feed.
Racks equipped with gas defrost are not
recommended for use with Howe Ice Flakers.
Both hot gas and saturated vapor defrost
produce poor quality refrigerant returning to
the liquid header which can result in saturated
flash-gas being supplied to the Ice Flaker. If the
Ice Flaker is intended to be connected to a gas
defrost Rack, please take all necessary
measures to prevent flash-gas from reaching
the Ice Flaker.

6
Engineering Guidelines
Figure 1

Engineering Guidelines
7
Piping Table
Model Liquid Line* Suction Line*
1000-RLE-CO2DX
1/2" ODS
5/8” ODS
2000-RLE-CO2DX
1/2” ODS
5/8” ODS
*For runs up to 150 feet. If longer, use next larger line size.
Refrigerant Pipework
Howe recommends the field refrigerant piping
be installed according to the Suggested
Refrigerant Piping Diagram shown on previous
page.
Howe recommends the use of hard drawn ACR
type L tubing with refrigeration grade wrought
copper long radius elbows and fittings only. No
soft drawn tubing should be used in the
refrigerant pipe installation.
No field installed P-type oil trap is required at
the base of the suction riser since all Ice Flakers
are internally piped with a suction trap at the
outlet of the evaporator within the enclosure.
Installation specifications should require all
refrigerant piping should be joined with a
suitable silver brazing alloy while purging
nitrogen through the piping to prevent copper
oxidation scale from forming inside the tubing.
Refrigerant Pipework Insulation
Requirements
Field refrigerant pipework should be insulated
with closed cell flexible elastomeric foam
thermal insulation intended for cold
applications.
Liquid lines should be covered with 1/2” thick
and suction lines with 3/4” thick material.
The insulation material should be moisture
vapor resistant when correctly installed
according to the manufacturer’s instructions.
All butt joints and seams must be properly field
fabricated according to the insulation
manufacturer’s fusing adhesive instructions.
Self-adhering closed cell foam insulation is also
available in rolls and can be used to supplement
the conventional tubular materials on irregular
shapes.

8
Field Installation
Field Installation
Safety Information and Guidelines
Only qualified service technicians should
attempt to install, service, or maintain the Ice
Flaker.
Make sure all power sources are disconnected
before any service work is done to the Ice
Flaker.
All field wiring must conform to the
requirements of the equipment and all
applicable local codes and national codes.
Any liquid line solenoid valve installed at the
rack should allow backwards flow in the event
of liquid trapping between the valve and the ice
flaker.
Inspection
Upon receipt, check all items against the bill of
lading to make sure all crates and cartons are
accounted for.
Any shortage or damages should be reported to
the delivering carrier. Damaged material
becomes the delivering carrier’s responsibility
and should not be returned to the
manufacturer unless prior approval is given.
Take care not to damage equipment when
uncrating.
Piping
The Ice Flaker has been thoroughly cleaned and
dehydrated at the factory. However, foreign
matter may enter the system by way of the
piping to the RPCP. Therefore, care must be
used during installation of the piping to prevent
entrance of foreign matter.
Install all refrigeration system components in
accordance with applicable local and national
codes and in conformance with good practice
required for the proper operation of the Ice
Flaker.
The refrigerant pipe size should be selected
from the Piping Table. The interconnecting pipe
size is not necessarily the same as the stub-out
on the Rack or the Ice Flaker.
The following procedures should be followed:
1. Do not leave units or piping open to the
atmosphere any longer than is
absolutely necessary.
2. Use only refrigeration grade copper
tubing, properly sealed against
contamination.
3. Suction lines should slope 1/4" per 10
feet towards the compressor.
4. Refer to the Suggested Refrigerant
Piping Diagram (p.6) for suitable P-type
oil trap locations to enhance oil return
to the compressor.
5. When brazing refrigerant lines, Dry
Nitrogen should be passed through the
line at low pressure to prevent scaling
and oxidation inside the tubing.
6. Use only a suitable silver solder alloy on
suction and liquid lines.

Field Installation
9
Field Wiring
All field wiring must be in compliance with local
and national codes. Use only copper
conductors of the appropriate size.
1. Install disconnect (not supplied by
factory).
2. Connect 230/1/60 power to the
terminals marked “L1” and “L2” in the
junction box on the rear of the Ice
Flaker.
3. In the junction box there are two red
wires marked “A” and “B”. Make sure
wire nut is secure.
4. Locate and connect Photo Eye sensors
to the matching plug inside the Ice
Flaker enclosure (see p.19).
Leak Testing
After all refrigerant connections are made, the
entire system must be leak tested. Use
accepted industry leak test methods. The
system should be pressurized to no more than
45 bar (653 psig).
It is recommended that this pressure be held
for a minimum of 12 hours and then rechecked.
For a satisfactory installation, the system must
be leak tight.
Evacuation
Do not use the refrigeration compressor to
evacuate the system. Do not start the
compressor while it is in a vacuum.
A good, deep vacuum pump should be
connected to both the low and high side
evacuation valves with copper tube or high
vacuum hoses (1/4” ID minimum).
If the compressor has service valves, they
should remain closed.
A deep vacuum gauge capable of registering
pressure in microns should be attached to the
system for pressure readings.
A shut off valve between the gauge connection
and vacuum pump should be provided to allow
the system pressure to be checked after
evacuation.
Do not turn off vacuum pump when connected
to an evacuated system before closing shut off
valve.
The vacuum pump should be operated until a
pressure of 1,500 microns absolute pressure is
reached – at which time the vacuum should be
broken with the refrigerant to be used in the
system through a drier until the system
pressure rises above “0” psig.
Refrigerant used during evacuation cannot be
vented. Reclaim all used refrigerant.
Repeat this operation a second time.
Open the compressor service valves and
evacuate the entire system to 500 microns
absolute pressure. Raise the pressure to 2 psig
with the refrigerant and remove the vacuum
pump.

10
Start Up & Operation
Installation Checklist
1. Has the ambient temperature been verified between 50°F – 100°F (10°C-38°C)?
(see Location Requirements p. 3)
2. Has the incoming water temperature been verified between 45°F – 90°F (7°C – 32°C)?
(see Water Supply Requirements p. 3)
3. Has the water supply pressure been verified between 20 PSIG (140kPa) and 60 PSIG (410kPa)?
(see Water Supply Requirements p. 3)
4. Has the filtered water supply been verified as not RO water?
(see Water Supply Requirements p.3)
5. Has the Ice Flaker been located near a floor sanitary drain?
(see Drain Water Piping Requirements p. 4)
6. Have all the refrigeration lines been sufficiently insulated?
(see Refrigerant Pipework Insulation Requirements p. 7)
7. Have the Photo Eye sensors been connected?
(see Field Wiring p. 9)
8. Has the system been leak tested properly?
(see Leak Testing p. 9)
9. Has the system been evacuated properly?
(see Evacuation p. 9)
10. Has the system been charged properly?

Start Up & Operation
11
Start Up and Operation
Water Operation
1. Water Inlet Connection
2. Float Valve
3. Water Pump
4. Water Regulating Valve
5. Water Distribution Pan & Side Spout
6. Sump Connections
7. Stop Valve
8. Condensate Drain Outlet
9. Sump Drain Outlet

12
Start Up & Operation
Water Inlet
The supply water feed for the Ice Flaker must
be connected here. A shut-off valve should be
field installed before this connection.
The Ice Flaker requires a minimum water
pressure of 20 PSIG (1.4 bar) and a maximum of
60 PSIG (4.1 bar).
Float Valve
The water level in the Water Sump is regulated
by the Float Valve.
The water level should always be below the
opening on the side of the Water Sump.
Section View of Water Sump
Water should never be allowed to flow from the
Water Sump back through the opening and into
the Bottom Casting.
Adjust the water level by rotating the float end
of the Float Valve. Rotate clockwise to raise the
water level and counterclockwise to lower the
water level.
Water Pump
The Water Pump drives the water in a
continuous flow through the system.
The Water Pump inlet should be submerged at
all times. Air should never be pulled into the
intake.
Overflow Drain
The higher of the two drain connections on the
Water Sump is the Overflow Drain.
If water is exiting the Water Sump through the
Overflow Drain, the water level is too high and
the Float Valve needs to be adjusted.
Sump Drain
The lower of the two is the Sump Drain. It is
used to flush the Water Sump of all liquid.
Stop Valve
The stop valve attached to the Sump Drain
fitting should always be closed during normal
operation.
The stop valve should only be opened during
cleaning or emptying of the Water Sump.

Start Up & Operation
13
Water Distribution Pan
The Water Distribution Pan circulates the water
fed from the Water Pump down the walls of the
Evaporator.
There are two small plastic tabs on the bottom
of the Water Distribution Pan. These tabs
should straddle the wing of the Ice Blade to
prevent it from rotating.
The tube exiting the Water Distribution Pan
from the bottom is the Lead Spout. It must
always be flowing with water during normal
operation and pointing perpendicular to the
evaporator surface.
Do not plug or cap the bottom Lead Spout.
Section View of Water Distribution Pan
Water level in the Water Distribution Pan
should be about halfway full. The Side Spouts
should never be starved of water.
Water Regulating Valve
Adjust the water level in the Water Distribution
Pan by opening or closing the Water Regulating
Valve located directly above the Water Sump.
Only adjust the Water Regulating Valve after
the Ice Flaker has been producing ice for at
least 10 minutes.
Condensate Drain & Sump Drain Outlets
Any water or moisture that has formed on the
Ice Flaker or inside the enclosure will flow out
through the Condensate Drain Outlet.
Water exiting the enclosure during cleaning or
emptying of the Water Sump will do so through
the Sump Drain Outlet.
Both of these drains outlets must connect to a
floor drain. Make sure they are clear from
restrictions and flows freely.

14
Start Up & Operation
Refrigerant Operation
*Piping insulation not shown
1. Solenoid Valve
2. Electronic Expansion Valve (EEV)
3. Evaporator
4. Pressure Transducer
5. Evaporator Pressure Regulator (EEPR)
6. Pressure Relief Valves

Start Up & Operation
15
Solenoid Valve
The Solenoid Valve controls the flow of liquid
refrigerant to the Evaporator.
The Solenoid Valve should energize
immediately upon starting the Ice Flaker.
The solenoid should only de-energize when the
Ice Flaker is in Off-Delay Cycle (p. 17) or
Overload Condition (p. 18).
Electronic Valves
CO2 systems feature two step motor operated
valves. Each valve has its own standalone
controller. The controllers are located in a
control panel mounted to the upper left hand
corner of the flaker enclosure frame. The
controllers come factory set for the
recommended settings, therefore no
adjustment should be required
The Electronic Expansion Valve (EEV) controls
the flow of liquid refrigerant into the
evaporator.
The Electronic Evaporator Pressure Regulator
(EEPR) valve will hold the suction temperature
at the proper level.
For more information on the controller settings,
view the section under Electrical Operation.
Internal Pressure Relief Valves
The Internal Pressure Relief Valves will relieve
any excess pressure from the evaporator to the
rack.
Field Capacity Check
The Ice Flaker is a continuous production
machine and makes ice at a steady rate once
stabilized.
A Capacity Check confirms the Ice Flaker and
refrigeration settings are correct.
1. Choose an appropriately sized container
and weigh it while empty.
Container Weight
Lbs.
2. Run the Ice Flaker for 10 minutes.
3. Position the container below the
opening of the Ice Flaker.
4. Catch the falling ice in the container for
exactly 15 minutes. Be sure that the
container catches all of the ice.
5. Weigh the ice and the container
together in pounds using an accurate
scale. Do not drain before weighing.
Measured Weight
Lbs.
6. Subtract the weight of the container.
Measured Weight
(from #5)
- Container Weight
-
(from #1)
= Calculated Weight
=
Lbs.
7. Calculate the capacity by multiplying
the calculated weight by 96.
Calculated Weight
(from #6)
x 96
x 96
= Capacity
=
Lbs. per
24 hrs.
8. Compare the number with the rated
capacity of the Ice Flaker. Keep in mind
temperatures outside the rated
conditions will have an effect on the
capacity.

16
Start Up & Operation
Electrical Operation
1. Level Control Relay (LC1)
2. Motor Relay (R1)
3. Control Module (CM)
4. Transformer (T1)
5. Power Switch
6. Ice Flaker Run Indicator Light
7. Motor Overload Indicator Light
1. Term 1: 24V Input Power
2. Term 2: 24V Input Power
3. Term 3: Control Signal
4. Term 4: Motor Overload Reset
5. Term 5: Motor Overload Switch Leg
6. Term 6: Ice Flaker Run Switch Leg
7. Term 7: Solenoid Valve Contact
8. Term 8: Solenoid Valve Contact
9. Off-Delay Setting
10. Motor Overload Setting
11. Overcurrent Condition Indicator Light
12. Overload Sensing Coil

Start Up & Operation
17
Level Control Relay (LC1)
This relay processes the signal from the Photo
Eyes. It shuts the Ice Flaker off when the Ice Bin
is full to prevent damage caused by ice backing
up into the evaporator section.
Motor Relay (R1)
This relay provides power to the Drive Motor,
the Water Pump, and the Solenoid Valve. It
features a manual override button, which when
depressed will engage the relay contacts, even
when the relay coil is not energized.
Transformer (T1)
This provides 24 volt control power to the
Control Module, Motor Relay, and indicating
lights.
Ice Flaker Run Indicator Light
This is lit green during Normal Operation.
Motor Overload Indicator Light
This is lit amber when Ice Flaker is in Overload
Condition.The Reset Button is located on the
rear of the Ice flaker. It is a normally open
switch, which resets the circuit after an
Overload Condition.
Control Module (CM)
The control Module features eight wire
terminals, two adjustable dials, and one
indicating light.
It operates in one of three main modes:
•Normal Operation
•Off-Delay Cycle
•Overload Condition
Normal Operation
Normal Operation begins when the Control
Module senses voltage at the Control Signal
(Term 3).
During Normal Operation voltage is present at
Ice Flaker Run Switch Leg (Term 6) and the
Solenoid Valve Contacts (Term 7 & 8) are
closed.
Off-Delay Cycle
The Off-Delay Cycle begins when voltage is
removed from the Control Signal (Term 3).
The length of the Off-Delay Cycle is determined
by the blue Off-Delay Setting dial. The
increments are in minutes with 1 being the
lowest possible setting and 30 being the
highest.
During the Off-Delay Cycle voltage is present at
Ice Flaker Run Switch Leg (Term 6) until the
time setting has been met. The Solenoid Valve
Contacts (Term 7 & 8) are opened when the
Off-Delay Cycle is initiated.
Off-Delay Setting
Under Normal Operation the Off-Delay Setting
should be adjusted to run approximately 2
minutes after the Solenoid Valve shuts off the
refrigeration to the Ice Flaker.
For proper adjustment, turn knob
counterclockwise until it stops. Then turn
clockwise 1/8 turn and stop.
The 30 minute setting is used for Cleaning
Procedure only.

18
Start Up & Operation
Overload Condition
An Overload Condition begins when the
Overload Sensing Coil reads amperage from the
motor lead passing through it that is higher
than the Motor Overload Setting.
During an Overload Condition no voltage is
present at Ice Flaker Run Switch Leg (Term 6),
the Solenoid Valve Contacts (Term 7 & 8) are
open, and the Overcurrent Condition Indicator
Light is lit red.
The Motor Overload setting should be adjusted
on start-up and anytime changes are made to
the Drive Motor or Main Shaft.
Motor Overload Setting
The proper adjustment of Motor Overload
Setting will protect the Ice Flaker and help avoid
nuisance service calls.
To set the Motor Overload correctly,
1. Mark the location of the setscrew
before an adjustment is made, as a
point of reference.
2. Place a small flat blade screwdriver in
the adjustment screw while the Ice
Flaker is operating.
3. Gently and slowly turn
counterclockwise until Overload
Condition Indication Light illuminates.
Do not force adjustment screw past
bottom stop.
4. Then turn adjustment screw clockwise 1
hash mark and stop.
5. Press the reset button to start the Ice
Flaker again.

Start Up & Operation
19
Photo Eyes (Level Control)
Emitter
Part# E20T104
Two Pins ( Blue & Brown )
One LED ( Green)
Receiver
Part# E20T105
Three Pins ( Blue, Black, & Brown )
Two LEDs ( Green & Amber )

20
Start Up & Operation
The Photoelectric sensors, or Photo Eyes, shoot
an infrared beam across the opening of the Ice
Flaker.
If this beam in interrupted for more than 15
seconds, the Ice Flaker will begin the Off-Delay
Cycle. This prevents ice from filling into the ice
making area and damaging internal parts.
The Ice Flaker will return to Normal Operation
when the infrared beam is re-established,
provided the Off-Delay Cycle has completed.
If the Ice Flaker was purchased without an Ice
Bin the Photo Eyes will be shipped loose and
need to be properly mounted by the installing
contractor. Please contact Howe for further
information.
Water or Moisture in Molex Plug
If the Molex plug for either the Emitter or
Receiver is wet or has moisture in it, shake
water off plug and dry properly.
Molex plug must be re-packed with Di-electric
grease every time it is unplugged to maintain
water resistance.
Correct Wiring Arrangement
The Emitter should have only the blue & brown
wires connected to it. There should not be any
pin in the center position on the Molex
connector attached to the Emitter.
The Receiver should have the blue, brown &
black wires connected.
Correct Voltage
With Level Control Relay plugged in and power
to Ice Flaker on, unplug Emitter and Receiver.
Use a voltmeter to verify 24 volts across blue
and brown pins.Alternatively you can check
terminals #1 and #10 on the Level Control
Relay.
If 24 volts is not present, the Level Control Relay
has likely failed and needs to be replaced.
Sequence of Operation
There are Light-Emitting Diode (LED) indicators
on the rear of both the Emitter & Receiver.
The Emitter has a green LED, which is
illuminated whenever the Ice Flaker has power.
The Receiver has two LEDs. The green LED is
always illuminated whenever the Ice Flaker has
power. The amber LED is illuminated when it
“sees” the infrared signal from the Emitter.
During Normal Operation, all LEDs should be lit.
The Level Control Relay (LC1) should open the
Solenoid Valve, and the Ice Flaker should begin
making ice.
When the infrared beam is blocked, both green
LEDs will remain lit. However, the amber LED
on the Receiver will go out.
After 15 seconds of the beam being blocked,
the Solenoid Valve will de-energize and the Off-
Delay Cycle will begin.
Depending upon the adjustment of the Off-
Delay Setting, the Driver Motor and Water
Pump will continue to operate for between 2 –
30 minutes.
If the Photo Eyes do not operate in this fashion,
please consult the Troubleshooting section.