Follett HCE700A Service Manual
HCE/HME700A, HCE/HME700W, Ice Machines
230 V/50 Hz (Self-contained)
Order parts online
www.follettice.com
Operation and Service Manual
Serial Numbers After H58642
Following installation, please forward this manual
to the appropriate operations person.
801 Church Lane • Easton, PA 18040, USA
Toll free (877) 612-5086 • +1 (610) 252-7301
www.follettice.com
01021674R06
CAUTION!
• This appliance should be permanently connected by a qualied person in accordance with application codes.
• If the supply cord is damaged, it must be replaced by the manufacturer, its service agent or similarly qualied
persons in order to avoid a hazard.
• Connect to potable water supply only.
• This appliance can be used by children aged 8 years and above and persons with reduced physical, sensory,
or mental capabilities, or lack of experience and knowledge if they have been given supervision or instruction
concerning use of the appliance in a safe way and understand the hazards involved. Children should be
supervised to ensure that they do not play with the appliance.
• This appliance is intended to be used for household and similar applications such as staff kitchen areas
in shops, offices and other working environments; farm houses and by clients in hotels, motels and
other residential type environments; bed and breakfast type environments; catering and similar non-retail
applications.
• WARNING! To avoid a hazard due to instability of the appliance, it must be xed in accordance with the
instructions.
• Warranty does not cover exterior or outside installations.
• Moving parts. Do not operate with front cover removed.
• Hot parts. Do not operate with cover removed.
• To reduce risk of shock, disconnect power before servicing.
• To prevent circuit breaker overload, wait 15 minutes before restarting this unit. This allows the compressor to
equalize and the evaporator to thaw.
• Drain line must be vented.
• Water supply must be treated by a scale-inhibiting lter.
• Most ice machine cleaners contain citric or phosphoric acid, which can cause skin irritation. Read caution
label on product and follow instructions carefully.
• Ice is slippery. Maintain counters and oors around dispenser in a clean and ice-free condition.
• Ice is food. Follow recommended cleaning instructions to maintain cleanliness of delivered ice.
2
Table of contents
Welcome to Follett Corporation ............................................................................................................................ 4
Specications ......................................................................................................................................................... 5
Operation ................................................................................................................................................................. 7
Cleaning .......................................................................................................................................................... 7
Weekly exterior care ................................................................................................................................. 7
Monthly condenser cleaning .................................................................................................................... 7
Semi-annual evaporator cleaning .................................................................................................................... 7
Service ................................................................................................................................................................... 12
Ice machine operation ................................................................................................................................... 12
Water system ................................................................................................................................................. 13
Electrical system ............................................................................................................................................ 14
Normal control board operation .............................................................................................................. 14
Error faults .............................................................................................................................................. 15
Hard error ............................................................................................................................................... 15
Soft errors ............................................................................................................................................... 15
Relay output indication ........................................................................................................................... 15
Flushing logic ......................................................................................................................................... 15
Wiring diagram ....................................................................................................................................... 16
Compressor data .................................................................................................................................... 17
Gearmotor data ...................................................................................................................................... 17
Resistance of windings .......................................................................................................................... 17
Mechanical system ................................................................................................................................. 18
Evaporator disassembly ......................................................................................................................... 18
Evaporator reassembly ........................................................................................................................... 21
Refrigeration system ...................................................................................................................................... 25
Refrigeration pressure data .................................................................................................................... 25
Refrigeration system diagram.................................................................................................................25
Refrigerant charge size .......................................................................................................................... 26
Refrigerant replacement requirements ................................................................................................... 26
Evacuation .............................................................................................................................................. 26
Ambients ................................................................................................................................................ 26
Ice capacity test ..................................................................................................................................... 26
Bin full detection system ................................................................................................................................ 27
Troubleshooting ............................................................................................................................................. 28
Replacement parts ........................................................................................................................................ 30
3
Welcome to Follett
Follett equipment enjoys a well-deserved reputation for excellent performance, long-term reliability and
outstanding after-the-sale support. To ensure that this equipment delivers the same degree of service, we ask
that you review the installation manual (provided as a separate document) before beginning to install the unit.
Our instructions are designed to help you achieve a trouble-free installation. Should you have any questions or
require technical help at any time, please call our technical service group at (877) 612-5086 or +1 (610) 252-
7301.
Before you begin
After uncrating and removing all packing material, inspect the equipment for concealed shipping damage. If damage
is found, notify the shipper immediately and contact Follett Corporation so that we can help in the ling of a claim,
if necessary.
Check your paperwork to determine which model you have. Follett model numbers are designed to provide information
about the type and capacity of Follett equipment. Following is an explanation of the different model numbers in the
Horizon 700 series.
Chewblet® Ice Machine Model Number Configurations
A V SC 700HC
MC Maestro™
Chewblet
(400 Series)
HC Horizon
Chewblet
(1000, 1400,
1650 Series)
HM Horizon
Micro
Chewblet
C 208-230/60/1 (icemaking head)
Self-contained only.
D 115/60/1 (icemaking head)
Self-contained and remote.
If remote unit, high side is
208-230/60/1.
E 230/50/1 (icemaking head)
Self-contained only.
F 115/60/1 (icemaking head)
Remote only. High side is
208-230/60/3.
400 up to
454 lbs
(206kg)
700 up to
750 lbs
(340kg)
1000 up to
1036 lbs
(471kg)
1400 up to
1450 lbs
(658kg)
1650 up to
1580 lbs
(717kg)
CondenserSeriesVoltageMachine
A Air-cooled, self-contained
W Water-cooled,
self-contained
R Air-cooled, remote
condensing unit
N Air-cooled, no condensing
unit for
connection to parallel rack
system
V Vision™
H Harmony™
B Ice storage
bin
J Drop-in
M Ice Manager™
diverter valve
system
ConfigurationApplication
®
S RIDE
(RIDE remote ice
delivery equipment)
T Top-mount
4
Specications
Water-cooled ice machine capacity/24 hrs.
Electrical
Each ice machine requires its own separate circuit with electrical disconnect within 10 ft (6m).
Equipment ground required.
Standard electrical: HCE/HME700: 230/50/1 (6 ft (2m) cord
Maximum ice machine fuse: 15A each
Amperage: 7A
Plumbing
3/8" OD push-in water inlet
3/4" MPT drain
1/4" FPT condenser inlet (water-cooled condenser only)
1/4" FPT condenser drain (water-cooled condenser only)
Notes: 3/4" vented drain line must slope a minimum of 1/4" per foot (6mm per 30.4 cm run).
Drain to be hard piped and insulated.
To prevent back ow, do not connect drains.
Separate drains for ice machine and condenser.
Water shut-off recommended within 10 feet (3 m).
Water supply must be treated by a scale-inhibiting lter (Follett item# 00130286).
Ambient
Air temperature 100 F/38 C max. 50 F/10 C min.
Water temperature 90 F/32 C max. 45 F/7 C min.
Water pressure – potable 70 psi max. (483 kPa) 10 psi min. (89 kPa)
Note: Water-cooled condenser pressure 150 psi (1034 kPa)
Heat rejection
Air-cooled rejects 8850 BTU/hr
Water-cooled rejects 10150 BTU/hr
Ice production
Note: Water regulating valve set to maintain a 215 PSIG (95°F Saturated R404A) discharge pressure at all
conditions.
Air-cooled ice machine capacity/24 hrs.
Ambient Air Temperature F/C
60
70
F
16
651
295
620
281
572
259
569
258
537
244
600
272
574
260
538
244
519
235
504
229
21
C
50
10
60
16
70
21
80
27
90
32
Inlet Water Temperature F/C
571
259
531
280
506
230
493
224
471
214
Ambient Air Temperature F/C
60
70
80
592
269
567
257
537
244
514
233
508
230
90
27
32
583
lbs
264
kg
548
lbs
249
kg
528
lbs
239
kg
489
lbs
222
kg
484
lbs
220
kg
80
90
100
27
32
38
518
460
209
443
201
416
189
415
188
389
176
lbs
kg
lbs
kg
lbs
kg
lbs
kg
lbs
kg
235
492
223
479
217
452
205
430
195
F
16
21
C
608
600
50
276
272
10
578
571
60
262
259
16
554
540
70
251
245
21
530
521
80
240
236
27
515
512
90
234
232
32
Potable Make-up Water Temperature F/C
5
Dimensions and clearances
Entire front of ice machine must be clear of obstructions/connections to allow removal.
1" (26 mm) clearance above ice machine for service.
1" (26 mm) minimum clearance on sides.
The intake and exhaust air grilles must provide at least 160 sq in (1032 sq cm) of open area.
Air-cooled model HCE700A ice machines – 18" (458 mm) minimum clearance between discharge and air
intake-grilles.
21.25
(54 cm)
ICE TRANSPORT HOSE CONNECTION
" (57 cm)
"
3/8"OD PUSH-IN WATER INLET
1.75 MIN.22.44
3/4" MPT DRAIN
AIR EXHAUST
22.46" (57 cm)
1/4" FPT CONDENSER
(WATER COOLED ONLY)
Operation
Cleaning and preventive maintenance (all models)
Note: Do not use bleach to sanitize or clean the icemaker.
Preventive maintenance
Periodic cleaning of Follett’s icemaker system is required to ensure peak performance and delivery of clean,
sanitary ice. The recommended cleaning procedures that follow should be performed at least as frequently as
recommended, and more often if environmental conditions dictate.
Cleaning of the condenser can usually be performed by facility personnel. Cleaning of the icemaker system,
in most cases, should be performed by your facility’s maintenance staff or a Follett authorized service agent.
Regardless of who performs the cleaning, it is the operator’s responsibility to see that this cleaning is performed
according to the schedule below. Service problems resulting from lack of preventive maintenance will not be
covered under the Follett warranty.
6
Weekly exterior care
The exterior may be cleaned with a stainless cleaner such as 3M Stainless Steel Cleaner & Polish or equivalent.
Monthly condenser cleaning (air-cooled icemaker only)
1. Use a vacuum cleaner or stiff brush to carefully clean condenser coils of air-cooled icemakers to ensure
optimal performance.
2. When reinstalling counter panels in front of remote icemakers, be sure that ventilation louvers line up with
condenser air duct.
Semi-annual evaporator cleaning (every 6 months)
WARNING
• Wear rubber gloves and safety goggles (and/or face shield) when handling ice machine cleaner or sanitizer.
CAUTION
• Use only Follett approved SafeCLEAN™ Cleaner (part #00132001) and NU-CALGON IMS-II or IMS-III
SANITIZER (00979674).
• Do not mix Cleaner and Sanitizer solutions together.
• DO NOT USE BLEACH.
• 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 packaging before use.
Note: Complete procedure for cleaning an sanitizing MUST be followed. Ice must be collected for
10minutes before putting ice machine back into service.
1. To clean – Remove cover. Press the CLEAN button.
The machine will drain. Wait for the LO WATER light
to come on (Fig. 1).
Fig. 1
LO WATER
7
2. Mix 1 gallon (3.8L) 120 F (49 C) water and
7 ounces (198g) (one 7 ounce packet of Follett
SafeCLEAN ice machine cleaner, part# 00132001).
Locate cleaning cup. Fill until CLEANER FULL light
comes on (Fig. 2).
Note: Do not use bleach to sanitize or clean the
icemaker.
3. Replace cover on cleaning cup. Wait until machine
restarts. Machine will clean, then ush 3 times in
approximately 15 minutes (Fig. 3).
Fig. 2
CLEANER
FULL
Fig. 3
4. To sanitize – Press CLEAN button. The machine will
drain. Wait for LO WATER light to come on
(Fig. 4).
15
Fig. 4
LO WATER
8
5. Mix 1 gallon 120 F (49 C) water and 1.6 ounces
(48ml) NU-CALGON IMS-II or IMS-III SANITIZER.
Fill until CLEANER FULL light comes on (Fig. 5).
Place one Sani-Sponge™ in remaining sanitizing
solution and retain for Step 9.
Note: Do not use bleach to sanitize or clean the
icemaker.
6. Replace cover on cleaning cup. Wait until machine
restarts. Machine will sanitize, then ush 3 times in
approximately 15 minutes (Fig. 6).
Fig. 5
CLEANER
FULL
Fig. 6
15
9
7. Disconnect coupling as shown (Fig. 7).
Note: Steps 8-11 must be completed before machine
ushes and starts producing ice.
8. Using disposable food service grade gloves, insert
dry Sani-Sponge™ (kit part# 00132068). Next,
insert Sani-Sponge soaked in Nu-Calgon IMS-II or
IMS-III sanitizer solution (from Step 5). Push both
Sani-Sponges down ice transport tube with supplied
pusher tube(Fig.8).
Fig. 7
Fig. 8
1
16"
(407mm)
2
3
10
10
9. Remove and discard 16" (407mm) pusher tube
(Fig.9).
10. Reconnect coupling. When sanitizing cycle ends,
machine will start producing ice. Press power
switch ON. Ice pushes Sani-Sponges through tube
(Fig.10).
Fig. 9
Fig. 10
11. Place a sanitary (2 gallon or larger) container in bin
or dispenser to collect Sani-Sponges and ice for 10
minutes. Collect 5.5 lbs (3kg) of ice from unit. Discard
ice and Sani-Sponges (Fig. 11).
Fig. 11
1111
Service
Ice machine operation (all models)
Follett’s ice machine consists of ve distinct functional systems covered in detail as follows:
§ Water system
§ Electrical control system
§ Mechanical assembly
§ Refrigeration system
§ Bin full
The Horizon ice machine overview
The Follett Horizon ice machine uses a horizontal, cylindrical evaporator to freeze water on its inner surface.
The refrigeration cycle is continuous; there is no batch cycle. The evaporator is ooded with water and the level
is controlled by sensors in a reservoir. A rotating auger (13 RPM) continuously scrapes ice from the inner wall
of the evaporator. The auger moves harvested ice through the evaporator into an ice extrusion canal. The ice
is forced through a restrictive nozzle that squeezes out the water and creates the Chewblet. The continuous
extrusion process pushes the Chewblets through a transport tube into a dispenser or bin.
A solid state PC board controls and monitors the functionality of the ice machine. In addition to sequencing
electrical components, the board monitors various operational parameters. A full complement of indicator lights
allows visual status of the machine's operation. Additionally, the PC board controls the self-ushing feature
of the ice machine. The evaporator water is periodically drained and replenished to remove minerals and
sediment.
A unique “bin full” detection system is incorporated in the Horizon ice machine. A switch located at the ice
discharge port of the machine detects the position of the transport tube. When the bin lls up with ice, the
transport tube moves out of the normal running position, and the switch turns the ice maker off. A domed
housing at the end of the transport tube contains the ice extrusion loads during shut down.
Harvest system diagram
Ice Transport Tube
Water Inlet
Compression
Nozzle
Auger
12
Water system
The water level in the evaporator is controlled by a feed solenoid and level detecting sensors. Referencing the
diagram below, water sensing rods extend down into the reservoir at the end of the evaporator assembly. The
system works via electrical conductivity as follows:
One of the longest probes is a common. When water is between any of the other probes and the common, the
PC board will sense the activation. During normal operation, the water level rises and falls between the Normal
High and Normal Low sensors. As water is consumed to make ice, the level will fall until the Normal Low sensor
is exposed, triggering the water feed solenoid on. Water will ll until the Normal High sensor is activated.
Note: The potable water dissolved solids content must be greater than 10 ppm for the water control system to
function properly. If using reverse osmosis water ltration system, ensure T.D.S level is greater than 10
ppm.
Water system diagram
Water level diagram
NORMAL
OPERATING
RANGE
13
NORMAL LO
COMMON
NORMAL HI
ALARM LO
Electrical system
FLASHINGON or OFF
Legend:
OFFON
ATTENTION!
To prevent circuit breaker overload, wait 15 minutes before
restarting this unit. This allows the compressor to equalize and
the evaporator to thaw.
Normal control board operation
The PC board indicator lights provide all the information necessary to determine the machine's status. Green
indicator lights generally represent “go” or normal operation; Yellow indicators represent normal off conditions;
Red indicators generally represent alarm conditions, some of which will lock the machine off.
A ashing green light labeled POWER indicates power to the machine. All other normal operation status
indicators are covered as follows:
Ice machine disposition Operating conditions
1. Ice machine is making ice.
.
2. Ice machine is not making ice.
DIP Switch Settings
1. Normal running.
2. Normal time delay. When the bin lls with ice, the LOW
BIN light goes out momentarily and the refrigeration
and auger drive systems immediately shut down. (Note:
The fan motor will continue to run for 10 minutes to cool
condenser) The TIME DELAY light comes on, initiating
the time delay period. When the time delay expires, the
machine will restart provided that the LOW BIN light is on.
14
Error faults:
The Horizon PC board monitors various operating parameters including high pressure, auger gearmotor
amperage limits, clogged drain, and low water alarm conditions. There are two types of errors namely “hard” or
“soft”. A hard error is one that shuts the machine off and will not allow restart until the reset button is pressed.
Even cycling power will not reset a hard error. A soft error can either be automatically reset should the condition
rectify, or if power is cycled. Should an error occur, consult the troubleshooting guide in this manual or a Follett
service technician.
Soft errors:
HI AMPS: The PC board monitors the amperage of the auger motor. Should the gear motor experience current
draw above the allowable limit, the machine will shut down and the TIME DELAY and HI AMP will be illuminated.
After the time delay the machine will restart and the TIME DELAY and HI AMP will clear.
LO WATER: During operation, the water level cycles between the normal low and normal high sensors. Should
the water be shut off to a running machine, a soft error will occur. The error sequence is as follows: During
operation, the water level falls to the normal low sensor, and when it does the water feed solenoid is energized.
If water is not detected at the normal low sensor within 10 seconds, a soft error will occur. The machine will shut
down, but the water feed solenoid will remain energized. Should water return, it will ll to the normal low sensor
and the machine will resume normal operation. The error will clear automatically.
HI PRESSURE: Should the refrigeration pressure rise above 425 psi, the machine will shut down and the TIME
DELAY and HIGH PRESSURE will be illuminated. After the time delay, and if the pressure has fallen back below
the reset point of 295 psi, the machine will restart and the TIME DELAY and HIGH PRESSURE will clear.
Hard error:
DRAIN CLOG: The drain clog sensor, located in the chassis, underneath the rear drain pan, will detect the
presence of water just below the top edge of the pan. If water does not properly ow out of the drain pan it will
overow into the chassis and rise to the sensor (especially during a self-ushing purge cycle). Pressing the reset
button will restart the ice machine.
Relay output indication:
Each relay on the board has an indicator light associated with its output. For example, when the relay for the
water feed solenoid is energized, the adjacent indicator light glows green.
Flushing logic
Flush on y: For every one (1) hour of ice making time, the machine will open the drain valve for a duration of
60 seconds. While the drain valve is open, the machine will continue to make ice and the water feed valve will
cycle to maintain water level.
Off cycle: At the completion of off-cycle time delay, the machine checks for a cumulative one (1) hour of ice
making time since the last off-cycle ush. If the cumulative ice making time exceeds one (1) hour, the machine
will open the drain valve for 60 seconds to drain the evaporator in its entirety. It will then rell with water and
begin making ice. If the ice making time is less than 1 hour, the machine will start and begin making ice
without draining the evaporator.
15
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