Rapid Freeze® Ice Flaker - All Categories On Howe Corporation

Rapid Freeze® Ice Flaker
Owner’s Manual for
Self-Contained Ice Flakers
1000-SCAE
Howe Corporation
1650 North Elston Avenue
Chicago, IL 60642-1585
Phone: 1-773-235-0200
Fax: 1-773-235-0269
Website: www.howecorp.com
Email: howeinfo@howecorp.com
ENGINEERING GUIDELINES ................................................................................................................... 3
Location Requirements ........................................................................................................................................................... 3
Water Supply Requirements.................................................................................................................................................... 3
Water Quality Requirements ................................................................................................................................................... 4
Drain Water Piping Requirements ........................................................................................................................................... 4
Electrical Requirements ........................................................................................................................................................... 4
ENCLOSURE REMOVAL AND REINSTALLATION...................................................................................... 5
Field Removal of the Stainless Steel Enclosure Panels ............................................................................................................. 5
Field Placement of the Stainless Steel Enclosure Panels........................................................................................................... 6
FIELD INSTALLATION ............................................................................................................................ 7
Inspection ............................................................................................................................................................................... 7
Safety Information and Guidelines .......................................................................................................................................... 7
Field Wiring ............................................................................................................................................................................. 8
Installation Checklist ............................................................................................................................................................... 8
START UP AND OPERATION.................................................................................................................. 9
Water Operation ..................................................................................................................................................................... 9
Self-Contained Refrigeration System ......................................................................................................................................12
Howe Digital Touchscreen Controller .....................................................................................................................................19
Mechanical Operation ............................................................................................................................................................26
Start-Up Checklist...................................................................................................................................................................28
MAINTENANCE .................................................................................................................................. 29
Preventative Maintenance Schedule ......................................................................................................................................29
Cleaning Procedure ................................................................................................................................................................30
Sanitizing Procedure...............................................................................................................................................................31
Lubrication .............................................................................................................................................................................32
Water Filtration......................................................................................................................................................................33
APPENDIX .......................................................................................................................................... 35
2
IMPORTANT
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.
Engineering Guidelines
the floor so as to prevent the assembly from
tipping when empty.
Location Requirements
Water Supply Requirements
FOR INDOOR USE ONLY
Water supply must be within the range of 45°F
to 90°F.
Howe 1000-SCAE Rapid Freeze Ice Flakers are
designed to operate in ambient room
temperatures between 70°F and 90°F.
Minimum Water
Supply Temp.
45°F
Minimum Ambient Maximum Ambient
Temperature
Temperature
70°F
90°F
Maximum Water
Supply Temp.
90°F
The water supply pressure must be within a 15
PSIG to 60 PSIG range.
The Ice Flaker warranty is void if it is installed
in ambient room temperatures below 70°F.
Minimum Water
Pressure
15 PSIG
A minimum of 1 foot clearance on all sides is
required when installing the Howe 1000-SCAE
Ice Flaker. This clearance is required for service
access and efficient operation.
Maximum Water
Pressure
60 PSIG
Straight Reverse Osmosis (RO) treated water
should never be supplied to the Ice Flaker.
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.
The Ice Flaker must be located above a sanitary
sewer floor drain hub or trench drain to ensure
proper drainage to the floor. Many designers
slope floors to the sanitary sewer inlets to
manage these wet areas.
If installing the Ice Flaker with a Howe Ice Bin,
ensure that the bin is adequately secured to
3
supply is within the Howe Water Quality
Standard. If your water quality is outside the
Standard additional water treatment may be
required to comply with the standard. Damage
to equipment caused by non-compliance with
the Howe Water Quality Standard will not be
covered by the Warranty.
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.
Drain Water Piping Requirements
Water Sump overflow and low-point drain feed
into the integrated condensate drain pan of the
flaker. The drain pan then discharges through a
¼” female NPT connection on the rear face of
the unit. It is recommended that the drain
spout be piped directly to a floor sanitary sewer
hub or trench drain.
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.
Water Quality Requirements
Water chemistry has a significant impact on the
operating efficiency, service requirements and
life of your Howe ice flaker. The Howe filtration
products help protect against a range of waterrelated problems and are recommended for all
Howe ice flaker installations.
Howe Water Quality Guidelines
Characteristic (mg/l)
Acceptable Range
TDS
40 to 250
Hardness
35 to 125
Alkalinity
35 to 150
pH
7.0 to 8.5
Chloride
75 max
Iron
0.1 max
Chlorine
0.2 max
Code authorities having jurisdiction may dictate
other indirect water connection requirements.
Electrical Requirements
A dedicated 2 pole, 208-230 volt, 60 Hz power
supply from a field furnished and installed
disconnect switch should be connected to
Terminals L1, L2, and the provided Grounding
Lug on the reverse of the machine. See
nameplate of equipment for Electrical
Specifications.
There are significant variations in water quality
from one region to another. It is the
responsibility of the owner/operator of the
equipment to assure that the incoming water
4
Enclosure Removal and
Reinstallation
Field Removal of the Stainless Steel
Enclosure Panels
WARNING: Never lift the flaker by the
enclosure panels as they are designed to be
removable and may come loose under such
conditions.
With the 3/8” bolt loosened, the Front panel
can be lifted away. Use the finger well to lift
the panel straight up at least 1 inch before
pulling the panel away from the machine.
The Front, Top, Right Side, and Left Side
enclosure panels for the Howe 1000-SCAE flaker
are designed to be easily removed in the field
for initial installation/adjustment and to allow
for service access should the need arise. The
Drain Pan and Back panel (containing electrical
and water service bulkheads) are fixed more
permanently and likely will never need to be
removed for the life of the machine. Should
such an extenuating circumstance arise, contact
Howe Customer Service for more information.
Once the Front panel is removed, the top panel
can simply be lifted away from the unit. Lift the
panel straight up at least 3 inches before pulling
it away from the machine. It may be helpful to
nudge the leading edge of the Top panel free of
the Left Side and Right Side panels before
lifting.
CAUTION: It is recommended that gloves are
worn when handling the panels to protect
from any sharp edges.
Most routine service and diagnostic tasks
should only require removal of the Front
enclosure panel. The panel is hung from the
leading edge of the Top panel and secured to
the base of the machine by a 3/8” head bolt
centrally located beneath the finger well.
Loosen this bolt in place to free the Front panel.
It is not necessary to remove the bolt entirely.
The Left Side and Right Side panels are each
secured by three 3/8” bolts along the base of
the machine, as well as three 5/16” sheetmetal
screws, connecting the Side panels to the Back
panel. For removal of each Side panel, first
remove the three 5/16” sheetmetal screws.
5
With the sheetmetal screws removed, and the
3/8” bolts loosened, the panel can be lifted
from the machine. Lift the panel straight up 1-2
inches before pulling the panel away from the
machine.
Field Placement of the Stainless
Steel Enclosure Panels
To reinstall the enclosure panels for the Howe
1000-SCAE flaker, simply perform the reverse of
the steps for removal. The Left Side and Right
Side panels must be secured to the machine
before the Top panel can be set in place. The
Top panel must be set in place before the Front
panel can be reinstalled.
Next, loosen the three 3/8” bolts located along
the base of the machine. It is not necessary to
remove these bolts entirely.
6
Field Installation
Safety Information and Guidelines
Inspection
Only qualified service technicians should
attempt to install, service, or maintain the Ice
Flaker.
Upon receipt, check all items against the bill of
lading to make sure all crates and cartons are
accounted for.
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 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.
When installing, it is recommended using a fork
truck to lift from the bottom of the drain pan.
The full weight of the machine, once removed
from its shipping crate, the machine weighs
approximately 500 lb.
Take care not to damage equipment when
uncrating or upon installation – in particular,
the tube-fin condensing coil on the rear of the
unit.
Regardless of method, the unit should never be
lifted directly over any personnel and all
appendages should be kept clear of the
footprint of the machine until it is at rest.
The Top, Front, and two Side Panels should be
removed to better see the position of the
flaker.
Never lift the flaker by the enclosure panels as
they are designed to be removable and may
come loose under such conditions.
7
Field Wiring
Connect 208-230V/1/60 power to the terminals
marked “L1” and “L2” in the Junction Box on the
rear of the flaker. Use the provided Grounding
terminal on the Terminal Strip to properly
ground the incoming power.
All field wiring must be in compliance with local
and national codes. Use only copper
conductors of the appropriate size.
All internal wiring is pre-installed from the
factory.
Installation Checklist
1. Has the ambient temperature been verified between 70°F – 90°F?
(see Location Requirements p.3)
2. Has the incoming water temperature been verified between 45°F – 90°F?
(see Water Supply Requirements p.3)
3. Has the water supply pressure been verified between 20 PSIG and 60 PSIG?
(see Water Supply Requirements p.3)
4. Has the filtered water supply been verified as not RO water?
(see Water Supply Requirements 3)
5. Has the Ice Flaker been located near a floor sanitary sewer drain?
(see Drain Water Piping Requirements p.4)
6. Is there a dedicated 208-230 Volt electric power supply connected to the unit? Measure line
voltage to confirm. The acceptable voltage range is 190-250 Volts.
(see Electrical Requirements p.4)
8
Start Up and Operation
Water Operation
9
1
8
5
7
44
2
3
1.
2.
3.
4.
5.
6.
7.
8.
9.
Water Inlet Connection
Float Valve
Water Pump
Water Regulating Valve
Water Distribution Pan & Side Spout
9
6
Sump Connections
Stop Valve
Condensate Drain Outlet
Sump Drain Outlet
Overflow Drain
The higher of the two drain connections on the
Water Sump is the Overflow Drain.
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.
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.
The Ice Flaker requires a minimum water
pressure of 15 PSIG and a maximum of 60 PSIG.
Sump Drain
The lower of the two is the Sump Drain. It is
used to flush the Water Sump of all liquid.
Float Valve
The water level in the Water Sump is regulated
by the Float Valve.
Stop Valve
The stop valve attached to the Sump Drain
fitting should always be closed during normal
operation.
The water level should always be below the
opening on the side of the Water Sump.
The stop valve should only be opened during
cleaning or emptying of the Water Sump.
Excess condensate and all overflow water from
the Water Sump will be discharged into the
built-in drain pan and directed to the external
drain connection on the back of the unit.
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 loosening the wing nut
connecting the float arm and valve arm and
adjusting each arm as needed. Additional fine
adjustment can be done by rotating the float
head.
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.
10
Water Distribution Pan
The Water Distribution Pan circulates the water
fed from the Water Pump down the walls of the
Evaporator.
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.
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.
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.
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.
Water exiting the enclosure during cleaning or
emptying of the Water Sump will do so through
the Sump Drain Outlet.
Do not plug or cap the bottom Lead Spout.
Both of these drain outlets must connect to a
floor drain. Make sure they are clear from
restrictions and flow freely.
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.
11
Self-Contained Refrigeration System
6
8
7
1
5
11
4
3
2
13
9
10
15 16
14
12
*Piping insulation not shown
8
2
6
3
1
7
14
13
5
12
10
11
1.
2.
3.
4.
5.
6.
7.
8.
9.
4
9
15
16
10. Evaporator Pressure Regulating Valve
(EPR)
11. Liquid Line Filter Drier
12. Moisture Indicator/Sight Glass
13. Evaporator Drum
14. Schrader Valve
15. Block Valve with Schrader Valve
16. Block Valve with Schrader Valve
Scroll Compressor
Condenser Coil
Condenser Fan Motor
Liquid Line Solenoid Valve
Refrigerant Receiver
Receiver Outlet Service Valve
Suction Accumulator
Accumulator Inlet Service Valve
Thermostatic Expansion Valve (TXV)
12
Refrigeration System Description
The HOWE self-contained air-cooled R-404A
refrigeration system is factory pre-charged,
operated, and is ready for use. See the Self
Contained Air Cooled Refrigeration System
schematic on page 12 of this manual.
photo below. A 40 Watt external band type
Crankcase Heater is also installed to provide
additional Compressor protection during the
refrigeration OFF-CYCLE.
A sealed hermetic Scroll Compressor ①
equipped with a 208-230 Volt, single phase, and
Capacitor Start-Capacitor Run motor with
inherent internal line break motor protection is
the heart of the system. An air cooled
condenser constructed of aluminum cross fins
on a copper tube coil ② is equipped with two
14 inch diameter fans each with a direct drive
permanent split capacitor open air over motor
③ with automatic reset thermal overload
internal protection. Additional refrigeration
system components include a refrigerant Liquid
Line Solenoid Valve ④, Liquid Refrigerant
Receiver ⑤ with an Outlet Service Valve ⑥
equipped with a High pressure service gauge
port. Also, for compressor protection there is a
Suction Accumulator ⑦which is equipped with
an Inlet Service Valve ⑧ and Low pressure
service gauge port. The adjustable Thermostatic
Expansion Valve ⑨ and the adjustable
Evaporator Pressure Regulator Valve ⑩ are
factory pre-set for general use. A Liquid Line
Filter Drier ⑪and a Moisture & Liquid Indicator
Sight Glass ⑫ completes the refrigerant piping
circuit.
D
B
A
C
Sequence of Operation
To start the flaker the rocker switch is placed in
the ON position and the green ON indication
lamp will illuminate. The Controller will then be
ready for commands. When commanded to run,
the Liquid line Solenoid Valve ④ is energized
by the Controller, increasing the system
pressure to the Cut-In pressure of 23 PSIG
which closes the R3 contacts. When closed, the
Compressor/Fan Contactor holding coil will then
energize the Compressor ① and both air
cooled condenser fan motors ③.
A non-adjustable High Pressure Cut-Out switch
and a non-adjustable Low Pressure Transducer
are connected and controlled by the Howe
Digital Touchscreen Controller. See the Wiring
Schematics located in the back of this manual.
Compressor electrical components contained in
the Compressor Electrical Component Enclosure
are the Start Capacitor [A], Start Relay [B], Run
Capacitor [C], and Contactor [D] depicted in the
The energized open Liquid Line Solenoid Valve
④ allows liquid refrigerant to flow to the
Thermostatic Expansion Valve ⑨ which is the
flow metering device that creates a large
pressure drop from the High Pressure side of
13
temperature refrigerant within the coil is
transferred through copper tubing to the cooler
ambient air temperature circulated across the
exterior surface of the tubes and aluminum fins.
Heat is rejected by the Condenser Fans ③ and
the refrigerant vapor condenses back to the
liquid state. The liquid refrigerant then flows to
the Refrigerant Receiver ⑤ to be recirculated
to the Thermostatic Expansion Valve ⑨. The
cycle is then repeated.
the system to the low pressure side of the
system (Evaporator/ Water Freezing
Surface⑬). Heat contained in the circulating
water which cascades across the freezing
surface of the flaker is transferred to the
vaporizing refrigerant within the Evaporator⑬
and the low pressure vapor exits and then flows
through the Evaporator Pressure Regulating
Valve ⑩.
Heat is continuously removed from the
circulating water until freezing occurs on the
freezing surface and the ice temperature is
further reduced down to about 20°F. As the
thickness of the ice growth on the freezing
surface increases the rotating Ice Blade shatters
the ice thereby harvesting flakes which fall
through the drop zone below. The Evaporator
Pressure Regulating Valve ⑩ maintains the
Evaporator pressure between 31 and 34 PSIG,
depending upon installation conditions. The
refrigerant vapor then enters the Suction
Accumulator ⑦ which insures only vapor and
no liquid refrigerant returns to the Compressor
①.
Once the harvested ice has accumulated to the
elevation of the Photoeye Sensors and the
beam is blocked for 15 seconds, the Controller
Off-Delay Cycle will begin. The Controller will
then close the Liquid Line Solenoid Valve which
will begin the refrigerant Pump-Down cycle.
The Pump Down cycle is required to ensure that
all liquid refrigerant has been evacuated from
the Low Side of the system. When the solenoid
valve is closed, the compressor and cooling fans
continue running until Cut-Out pressure (5
PSIG) is reached and are then de-energized.
The Water Pump and Drive Motor will continue
to run until the factory-set Pump Down interval
(90 seconds total) expires.
The Compressor ① compresses the low
temperature vapor and raises the refrigerant
temperature and pressure to create the High
Pressure side of the system. The superheated
refrigerant is discharged to the Air Cooled
Condenser Coil ② where heat from the high
14
Pre-Start up Refrigeration System Checklist
1. Confirm the 208-230 volt single phase power supply to the Howe flaker is switched OFF at
the branch circuit breaker and/or the sight disconnect switch near the Howe flaker.
Measure voltage at the flaker terminal strip terminals L1 and L2 to confirm there is no
applied voltage.
2. Confirm the flaker rocker switch is in the OFF position.
3. Open (Backseat) the Liquid Receiver Outlet Service Valve and the Suction Accumulator Inlet
Service Valve. This will allow the refrigerant charge which was manually pumped down at
the Howe factory for shipping to enter the system however the Liquid Line Solenoid will
remain de-energized or closed at this time.
4. Visually inspect the Moisture & Liquid Indicator and confirm the indicator element is GREEN
which indicates the system refrigerant condition is DRY. If the indicator element is not
GREEN or DRY notify the Howe Service Department at (773)235-0200.
5. The Howe flaker rocker switch must remain in the OFF position and switch ON the 208-230
Volt single phase power supply to the Howe flaker. Measure voltage at the terminal strip
terminals L1 and L2 to confirm voltage is applied.
6. This will energize the 40 Watt Crankcase Heater which must remain on for a duration of 12
hours before attempting to Start-Up the refrigeration system by switching ON the Howe
Flaker rocker switch.
7. Confirm the heater amperage draw is about 0.2 amperes. Use a handheld Infrared
thermometer to confirm the heating element is thermally hot.
15
Evaporator Pressure Setting
Model
Temperature
R-404A
1000-SCAE
0°F
33 PSI
To decrease the pressure setting, rotate
counter-clockwise.
Evaporator Pressure Regulator (EPR)
EPR valves will be factory set, however,
different applications may require the correct
setting be verified.
If EPR fails to regulate pressure properly it must
be repaired or replaced.
The EPR will hold the suction temperature at
the proper level, allowing for minor
adjustments to be made using the Thermostatic
Expansion Valve (TXV).
Even though the suction temperature at the
Evaporator is correct, the TXV may still be
underfeeding or overfeeding.
To read EPR setting install service manifold at
the Pressure Tap of the Evaporator or at the
inlet of the EPR. Alternatively, the Evaporator
pressure is displayed on the Touchscreen
Display whenever the machine is in Machine
Running condition.
For Angle Style EPR, remove end cap and adjust
using a 1/4" hex wrench.
To increase the pressure setting, rotate
clockwise.
16
Thermostatic Expansion Valve (TXV)
Always adjust the EPR prior to adjusting the
TXV.
TXV Underfeeding
2. If the TXV is not underfeeding, close the
TXV by 1/4 of a turn and wait 5
minutes.
3. Visually inspect the frost pattern of the
Evaporator.
Superheat is not a reliable method of adjusting
TXV on Ice Flaker. TXV must be adjusted while
visually inspecting the Evaporator’s freezing
surface.
4. Repeat steps #2 and #3 until
underfeeding can be seen at the very
bottom of the Evaporator.
To increase the refrigerant feed of the TXV,
rotate stem counterclockwise.
5. Now, open the TXV by 1/4 of a turn and
wait 5 minutes.
To decrease the refrigerant feed of the TXV,
rotate stem clockwise.
6. Repeat step #5 until the entire frost
pattern of the Evaporator becomes
milky white and harvests completely.
Adjusting Refrigeration to the Ice Flaker
1. Visually inspect the frost pattern on the
freezing surface of the Evaporator.
7. Confirm correct EPR setting.
If the TXV is underfeeding, the top of
the frost pattern will be a milky white
color and the bottom will be clear, soft,
and not harvest properly.
17
Solenoid Valve
The Solenoid Valve controls the flow of liquid
refrigerant to the Evaporator.
A Capacity Check confirms the Ice Flaker and
refrigeration settings are correct.
1. Choose an appropriately sized container
and weigh it while empty.
The Solenoid Valve should energize
immediately upon starting the Ice Flaker.
Container Weight
Sight Glass
The Sight Glass provides a quick way to visually
check that the Ice Flaker is being provided with
constant liquid refrigerant and that there is no
moisture in the system.
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.
There should never be bubbles in the Sight
Glass. This indicates a flashing or inconsistent
liquid feed.
The moisture indicator in the middle of the
Sight Glass should always be green.
•
•
Lbs.
Measured Weight
Green – Dry
Yellow – Wet
Lbs.
6. Subtract the weight of the container.
Measured Weight
- Container Weight = Calculated Weight =
Fan Cycling Control
Both condensing unit fans should run
automatically whenever the Compressor is
running.
(from #5)
(from #1)
Lbs.
7. Calculate the capacity by multiplying
the calculated weight by 96.
Calculated Weight
x 96
= Capacity =
(from #6)
x 96
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.
Field Capacity Check
The Ice Flaker is a continuous production
machine and makes ice at a steady rate once
stabilized.
18
Howe Digital Touchscreen Controller
The Howe Digital Touchscreen Controller is shipped pre-wired and pre-programmed for your application
from the factory. Upon startup, some adjustment of the TX and EPR valves may be necessary depending
on your installation. When supplied power, the Main Power Switch can be flipped to the ON position to
illuminate the controller and ready the device for further commands. The Main Power Switch alone will
never turn on the Ice Flaker Head.
When at rest, the controller will default to the Home Screen. The Home Screen indicates the time
remaining until the programmable Autostart is reached and the current Status of the machine. The
Autostart feature is disabled with factory default settings, displaying “--:--:--“ time until Autostart.
When navigating the Menus of the controller, the Home Screen can be reached at any time by clicking
the HOME icon in the upper left corner of the display.
While navigating away from the Home Screen, if the display is at rest for longer than 15 seconds, the
Controller will automatically return to the most recent screen displayed. This will continue to occur until
the display receives input from the operator or the Home Screen is reached.
19
Getting Started
When initially installed and powered ON, the end user should set the Local Time and Autostart
Adjustment parameters found in the Menus of the Controller.
To set the Local Time:
1. Press the MAIN MENU button on the Hold Screen.
2. Press the MAINTENANCE MENU button within the Main Menu.
3. Press the SET LOCAL TIME button within the Maintenance Menu.
4. Using the arrows found to the right of the dialog boxes, set your Local Time and Date and
press DONE.
When complete, the Controller will revert to the Home Screen.
20
To adjust Autostart function
1. Press the MAIN MENU button on the Hold Screen.
2. Press the AUTOSTART ADJUSTMENT button within the Main Menu.
3. Press the day of the week you would like to adjust.
4. Press the EDIT buttons to set Start Time and Run Time for that day.
5. Use the keypad to set Start Time and Run Time for that day. Press the green ✔ when
complete. Repeat for each day as necessary.
21
For Normal Operation, there are two ways the controller can command the Flaker to begin
producing Ice.
1. The START NOW button on the Home Screen.
When pressed, this acts button as a manual override to the in-built Automatic Start Timer
and can be used to begin producing ice whenever the machine is in READY status.
Once pressed, the controller will prompt you for a run time. Select desired duration and the
flaker will immediately begin generating ice.
2. The Autostart time is reached, as displayed on the Home Screen.
The Autostart feature is a field-programmable Internal Clock Timer that can be used to set
daily start and run times for the Flaker. Each day of the week can be programmed with a
unique Autostart time and Run Time length. The Autostart feature is disabled with factory
default settings, displaying “--:--:--“ time until Autostart.
22
Under Normal Conditions, there are three ways that the controller can command the Flaker
to stop producing ice and go into Pump Down condition.
1. Manual Stop.
At any time during regular operation, the machine can be commanded to stop producing
ice, interrupting the internal Autostart feature. Press the STOP button on the Machine
Running screen. Once manually interrupted, the Autostart function for that day is
considered expired.
2. Autostart/Manual Duration expires.
When the machine has met the field-programmed timer duration, the machine will
automatically begin Pump Down sequence.
3. Photoeyes interrupted/Bin Full condition.
Machine will automatically begin the Pump Down sequence when the photoeyes cannot
‘see’ one another – typically indicating the Ice Bin has been filled. If the Ice Bin is emptied
and the Autostart timer has not expired, the machine will automatically begin producing ice
again until either of the conditions are met.
23
When the Flaker initiates a Stop/Pumpdown cycle under any of the above-listed
circumstances, three things will occur:
a. Solenoid will be de-energized, cutting off liquid refrigerant to the expansion valve.
b. The Compressor and Fans will continue to run until factory-set “Cut-Out” pressure is
achieved (evacuating the suction side of refrigerant).
c. The Main Drive Motor and Water Pump will continue to run for 90 seconds to ensure the
flaker is cleared of ice before the next run cycle.
Alarms and Alarm History
There are a number of factory-programmed Alarms included within the Howe Digital
Touchscreen Controller that will display an ALARM screen under specific undesirable conditions –
indicating specifically what condition triggered the Alarm. If an ALARM screen is displayed, a capable
Refrigerant Technician should investigate the problem immediately. To continue to operate the
machine, press the OK acknowledgement icon in the corner of the ALARM screen.
When acknowledged, all Alarm conditions will be saved and can be reviewed in the ALARM
HISTORY screen, available in under the MAINTENANCE MENU. To access the ALARM HISTORY:
1. Press the MAIN MENU button.
2. Press the MAINTENANCE MENU.
3. Press the ALARM HISTORY button to access the Alarm History screen.
24
Preventative Maintenance and Automatic Clean Cycle
The Howe Digital Touchscreen Controller has an internal clock that records Running Hours and
informs the operator when a PM Service is due. Total Run Hours can be found in the MACHINE
INFORMATION Screen under the Main Menu.
When a PM Service is nearly due, an automatic ATTENTION screen will appear, indicating the
specifics of the PM Service that is due. Please refer to the Howe product Installation and Service Manual
for how to conduct the PM. Only qualified Refrigeration Technicians should perform the PM Service. To
continue to operate the machine, press the OK acknowledgement icon in the corner of the ATTENTION
screen. Acknowledgement of the PM notification will be recorded in the ALARM HISTORY screen, found
in the MAINTENANCE MENU.
When performing the Descaling and Sanitizing Preventative Maintenance service, please consult
the product Owner’s Service Manual for more information to ensure that no cleaning solution
contaminates otherwise usable ice that may be stored beneath the Flaker. To access the Automatic
Cleaning Cycle within the controller, follow the steps below:
1. Press the MAINTENANCE MENU button within the Main Menu.
2. Press the AUTOMATIC CLEAN CYCLE button within the Maintenance Menu. The Machine will
begin its cleaning cycle for 30 minutes and indicate time remaining on the cycle.
25
Mechanical Operation
1. Ice Deflector
2. Ice Blade
3. Squeegee
4. Speed Reducer
5. Drive Motor
26
Gear Motor
The Gear Motor is a drive motor and speed
reducer combined into one single unit.
Ice Deflector
The Ice Deflector prevents ice from dropping
into the water return trough.
A properly installed Ice Deflector should have
the top outer edge positioned outside of the ice
drop zone to ensure all falling ice will hit the Ice
Deflector.
You should never try to remove the motor or
open the housing of the Gear Motor.
Sleeve Bearings
Ice Flakers have two Sleeve Bearings on the
Main Shaft located in the Top Casting and the
Bottom Casting.
There should be a minimum 1/8” clearance
between the top of the Ice Deflector and the
aluminum lip of the Bottom Casting under the
Evaporator.
Over time, normal usage can cause these
bearings to wear.
There should also be a minimum 1/8” clearance
between the outer edge of the Ice Deflector
and the Bottom Casting.
Worn bearings can result in ice harvesting
problems and even damage to the Evaporator.
The Ice Deflector should never touch the Ice
Deflector Scraper or the Bottom Casting.
Improper refrigeration setting and lack of
maintenance can cause the Sleeve Bearings to
wear faster than normal.
Ice Blade
The Ice Blade shatters the ice formed on the
Evaporator freezing surface as the Main Shaft
rotates.
Please contact Howe to receive the Sleeve
Bearing Replacement Instructions for your
model Ice Flaker.
Ice harvesting problems are often caused by
improper refrigeration settings. Adjusting the
Ice Blade should be a last resort after all other
means have been expended.
27
Start-Up Checklist
1. Have you followed the Pre-Start up Refrigeration System Checklist?
(see Pre-Start up Refrigeration System Checklist p.15)
2. Is the operating water level in the Water Sump correct?
(see Float Valve p.10)
3. Is the operating water level in the Water Distribution Pan correct?
(see Water Distribution Pan p.11)
4. Is the Stop Valve on Sump Drain connection closed?
(see Stop Valve p.10)
5. Is the Suction Temperature at the Evaporator correct?
(see Evaporator Pressure Setting p.16)
6. Have you visually inspected the freezing surface of the Evaporator?
(see Adjusting Refrigeration to the Ice Flaker p.17)
7. Have you run a Field Capacity Check?
(see Field Capacity Check p.18)
8. Have you completed and returned the Ice Flaker warranty registration?
28
Maintenance
Preventative Maintenance Schedule
Page
Number
Every 6
Months
Ensure Float Valve is unclogged and
flowing freely
3
•
Clean and Sanitize Ice Flaker
30
•
Replace Water Filter Cartridge
33
•
Run a Field Capacity Check
18
•
Check Main Shaft for movement and
Sleeve Bearing wear
27
•
Lubricate Sleeve Bearings
32
•
29
Every 12
Months
Cleaning Procedure
To keep the evaporator in peak performance,
the Ice Flaker should be cleaned every 6 months
or as the touchscreen controller dictates.
Only use cleaning solutions that are labeled as
“Nickel-Safe”.
1. Turn the Power Switch “Off” at the Ice
Flaker Control Panel.
4. Open Ice Flaker Stop Valve to allow
water to exit from Water Sump.
Afterwards close Stop Valve to prevent
loss of solution.
2. Remove all ice from Ice Bin.
5. Prepare approved cleaning solution by
following manufacturer’s instructions.
3. Close water supply at shut-off valve.
6. Pour cleaning solution into Water Sump
to a level just below the side opening.
30
Alternate Method: Substitute an approved
sanitizer designed for general use in food
dispensing equipment in Step 1. Mix sanitizing
solution according to instructions on the bottle.
7. Initiate the AUTOMATIC CLEAN CYCLE
found within the controller menus.
8. After cleaning, drain solution as shown
in Step 4 except keep Stop Valve open.
9. Fill Water Sump with fresh water.
Initiate the AUTOMATIC CLEAN CYCLE
found within the controller menus. This
will flush cleaning solution from Ice
Flaker while it is being drained.
10. Continue filling Water Sump with fresh
water until all cleaning solution is
flushed out.
Sanitizing Procedure
1. Mix 16 oz. of household bleach with 2
gallons of warm water (90°F – 115°F).
2. Pour solution into the Water Sump to
the normal operating level, then recirculate the sanitizing solution by using
the preprogrammed AUTOMATIC
CLEAN CYCLE feature found in the
Controller Menus.
3. Drain solution and rinse thoroughly
with fresh water at least twice,
following the technique described in
Cleaning Procedure #9.
4. After the Ice Flaker is thoroughly rinsed,
return to normal operation by opening
water supply valve, re-adjusting OffDelay Setting, and restoring
refrigeration by turning the Power
Switch back to “On”.
31
Lubrication
Gear Motor Lubrication
The Gear Motor is permanently lubricated and
does not normally require re-lubrication.
Sleeve Bearing Lubrication
The bearings should be greased annually using
USDA approved food grade edible grease.
Over-greasing may “pop” the seal out of its
normal position.
If over-greased and the seal is popped out of
position, the excess grease will need to be
removed prior to re-installing the seal.
If seal is damaged due to over-greasing it may
need to be replaced.
Typically, only one squirt of the grease gun is
required or until you feel resistance on the
pump.
Use caution to ensure the bearings is not overgreased.
32
Water Filtration
cause added wear on parts and can clog valves
and impede flow.
The purpose of water filtration is to keep the Ice
Flaker clean and operating efficiently.
The value to the user is reduced operating cost
due to less maintenance, improved
performance and a greater return on
investment as result of extended asset life.
There are three primary categories of
contaminants that damage and cause the Ice
Flaker to operate inefficiently. They are listed
here in order of importance with regard to
impact.
The effects of scale and sediment can be very
destructive to the Ice Flaker.
1. Scale
2. Sediment
3. Chlorine
Chlorine
Chlorine is the most common disinfectant used
to kill pathogenic organisms in order to make
our water safe to drink. However, residual free
chlorine in water can contribute to pitting, rust
and corrosion of stainless steel.
Scale
Scale or fouling is the accumulation of
unwanted material on solid surfaces to the
detriment of function. Scale is primarily made
up of calcium and magnesium hardness
compounds.
It’s estimated that scale is responsible for 70%
of unscheduled maintenance, inefficient
operation, and down time.
Scale forms on wetted surfaces, accumulates in
tubing and fittings and interferes with
operation.
Sediment
The formation of scale from dissolved minerals
is made worse by sediment.
If not removed from water, chlorine mixes with
moisture in the Ice Flaker and Ice bin to form a
mild hydrochloric acid. This acid can cause
surface rust to form on stainless steel surfaces
in one to two years.
Sediment is suspended particles of dirt, silt and
other fine particulate matter that act as a
catalyst for scale to form.
Sediment can be detrimental to the condition
and performance of the Ice Flaker. Particulates
33
Howe Water Filters
Howe offers a complete line of water treatment
systems designed to extend the life and
performance of the Ice Flaker.
Howe Water Filters inhibit the formation of
scale and provides additional corrosion
protection.
They remove 95% of all dirt, rust, and sediment
larger than 5 microns.
They reduce chlorine to less than 2 PPM to
guard against corrosion and improve ice quality.
Water Filter Cartridge Replacement
1. Turn off water filtration system by
closing ball valve.
2. Press the red button to release
pressure.
3. Remove housing(s) – use filter wrench if
necessary. Clean housings with warm
water. If desired, disinfect housings
using 1/2 teaspoon of household bleach
in a bowl of water. Let stand 5 minutes,
and then discard.
4. Insert new cartridges into filter
housings. Match cartridge model
numbers to model numbers on bracket.
5. Make certain the O-ring is properly
positioned and reinstall filter housing
(hand tighten only).
6. Slightly open the inlet ball valve; push
the red pressure relief button to release
trapped air until a small amount of
water comes out – release the red
button and fully open the ball valve.
7. Turn connected equipment back on.
34
Appendix
Cut View – 1000-RLE
Owner’s Manual For Use with 1000-SCAE
Rev. Date: Feb 2017
Wiring Diagram – Ice Flaker
FEBRUARY 27, 2017
SCHEMATIC WIRING DIAGRAM FOR 1000-SCAE
FIELD ELECTRICAL
SUPPLY
208-230, 1 PH
NOTE: BRANCH CIRCUIT AND FUSED
DISCONNECT SWITCH BY OTHERS PER ALL
APPLICABLE CODES
L1
T1
LOW WATER
PRESSURE
CUT-OUT
c
L2
T2
HOWE CORPORATION
RAPID FREEZE FLAKE ICE MACHINES
POWER SUPPLY
TERMINAL BLOCK
JUNCTION BOX
G
G
GRN
HOWE DIGITAL
TOUCHSCREEN
CONTROLLER
23
BLK
24
BLK
7
BLK
8
BLK
RED
5
RED
6
HIGH PRESSURE CUT-OUT
BLK
CRANKCASE
HEATER
BLK
COMPRESSOR ELECTRICAL
COMPONENT ENCLOSURE
COPELAND
SCROLL
COMPRESSOR
L2
L1
C
M
CFC
S
R
T1
YEL
25A
CONTACTOR
T2
BLK
RED
WHT
FAN A
RED
1
POTENTIAL
RELAY
BLK
BLK
2
BLU
M
M
5
RUN CAPACITOR
YEL
START CAPACITOR
RED
Owner’s Manual For Use with 1000-SCAE
Rev. Date: Feb 2017
FAN B
Owner’s Manual For Use with 1000-SCAE
Rev. Date: Feb 2017
Owner’s Manual For Use with 1000-SCAE
Rev. Date: Feb 2017
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