Following installation, please forward this manual
to the appropriate operations person.
801 Church Lane • Easton, PA 18044, USA
Toll free (877) 612-5086 • +1 (610) 252-7301
www.follettice.com
01034693R00
Page 2
2 Horizon 1650R/N Ice Machines
Page 3
Table of contents
Welcome to Follett Corporation ..................................................................................................................................4
Cleaning, weekly exterior care ..............................................................................................................................7
Service .........................................................................................................................................................................12
Water system .......................................................................................................................................................13
Electrical system .................................................................................................................................................14
Normal control board operation ....................................................................................................................14
Test points ....................................................................................................................................................15
Hard errors ...................................................................................................................................................15
Wiring diagram, evaporator unit ...................................................................................................................16
Wiring diagram, condenser unit ...................................................................................................................17
Gearmotor data ............................................................................................................................................17
Mechanical system ..............................................................................................................................................18
Refrigeration system ...........................................................................................................................................23
Condenser unit operation .............................................................................................................................23
Refrigerant pressure data .............................................................................................................................23
Ice capacity test ...........................................................................................................................................25
Bin full detection system .....................................................................................................................................26
Replacement parts ..............................................................................................................................................30
Horizon 1650R/N Ice Machines 3
Page 4
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 1650
series.
Chewblet® Ice Machine Model Number Configurations
RBSD1650HC
IcemakerVoltageSeriesCondenser
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 is208-230/60/1.
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 lb
(206 kg)
1000 up to
1036 lb
(471 kg)
1400 up to
1450 lb
(658 kg)
1650 up to
1580 lb
(717 kg)
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
ApplicationConfiguration
V Vision™
H Harmony™
B Ice storage
bin
J Drop-in
M Ice Manager™
diverter valve
system
S RIDE
(RIDE remote
ice delivery
equipment)
T Top-mount
CAUTION
• 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.
• 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.
®
4 Horizon 1650R/N Ice Machines
Page 5
Speci cations
F
C
50
10
60
16
70
21
80
27
90
32
60
16
1669
757
1596
724
1523
691
1440
653
1356
615
70
21
1580
717
1528
693
1474
669
1387
629
1298
589
80
27
1479
671
1451
658
1424
646
1332
604
1240
562
90
32
1422
645
1387
629
1350
612
1267
575
118 3
537
100
38
1366
620
1310
594
1254
569
119 1
540
112 7
511
lbs
kg
lbs
kg
lbs
kg
lbs
kg
lbs
kg
Inlet Water Temperature F/C
Ambient Air Temperature F/C
Ice machine capacity/24 hrs.
Electrical
Separate circuit and equipment ground required.
Evaporator unit
Standard electrical – 115/60/1
Maximum fuse – 15A
Amperage – 6A
Condensing unit
Single-Phase3-Phase
Electrical208-230 V, 6 0Hz208-230 V, 60 Hz
Maximum Circuit HVACR breaker size50A35A
Minimum Circuit Ampacity29.9A21.2A
Evaporator plumbing
3/8" OD push-in water inlet
3/4" MPT
Notes: 3/4" vented drain line must slope a minimum of 1/4" per ft (6mm per 30.4 cm run).
Drain to be hard piped and insulated.
Water shut-off recommended within 10 ft (3 m).
Follett recommends installation of Follett water lter system (P/N 00130286) in ice machine
inlet water line.
Ambient
Evaporator unit
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 70 psi max. (483 kPa) 10 psi min. (69 kPa)
Condenser unit
Air temperature 120 F/49 C max. -20 F/-29 C min.
Refrigeration
3/8" liquid line – insulated
7/8" suction line – insulated
Note:Rack system installations require a capacity of 7,700 BTU/hr at 0 F (-18 C) evaporator temperature.
Evaporator pressure regulator (not supplied) is required.
Weight Ice production
Evaporator unit
190 lb (88 kg)
Condenser unit
Single-phase: 390 lb (177 kg)
3-phase: 340 lb (154 kg)
Horizon 1650R/N Ice Machines 5
Page 6
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.
Note: Do not use bleach to sanitize or clean the ice machine.
Preventive maintenance
Periodic cleaning of Follett’s ice machine 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 ice machine 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.
Weekly exterior care
The exterior may be cleaned with a stainless cleaner such as 3M Stainless Steel Cleaner & Polish or equivalent.
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 (P/N 00132001) and NU-CALGON IMS-II SANITIZER.
• 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
10 minutes before putting ice machine back into service.
Fig. 1
1. To clean – Remove cover. Press the CLEAN button. The
machine will drain. Wait for the LO WATER light to come
on (Fig. 1).
Note: For Ice Manager diverter valve application, refer
to manual 00175273 for ice machine and diverter valve
cleaning process.
Horizon 1650R/N Ice Machines 7
Page 8
2. Mix 1 gallon (3.8 L) 120 F (49 C) water and
HI WATER
12
LO WATER
N
A
E
L
C
7 oz (198 g) (one 7 oz packet of Follett SafeCLEAN ice
machine cleaner, P/N 00132001). Locate cleaning cup.
Fill until HI WATER light comes on (Fig. 2).
Note: Do not use bleach to sanitize or clean the ice machine.
3. Replace cover on cleaning cup. Wait until machine
restarts. Machine will clean, then ush 3 times in
approximately 12 minutes (Fig. 3).
Fig. 2
Fig. 3
Fig. 4
4. To sanitize – Press CLEAN button. The machine will
drain. Wait for LO WATER light to come on (Fig. 4).
8 Horizon 1650R/N Ice Machines
Page 9
5. Mix 1 gallon 120 F (49 C) water and 1.6 oz (48 ml)
HI WATER
12
NU-CALGON IMS-II SANITIZER. Fill until HI WATER
light comes on (Fig. 5).
Note: Do not use bleach to sanitize or clean the ice machine.
6. Replace cover on cleaning cup. Wait until machine
restarts. Machine will sanitize, then ush 3 times in
approximately 12 minutes (Fig. 6).
Fig. 5
Fig. 6
Fig. 7
7. To clean transport tube – Press power switch OFF
(Fig.7).
Horizon 1650R/N Ice Machines 9
Page 10
8. Disconnect coupling as shown (Fig. 8).
1
2
3
16"
(407mm)
9. Using disposable food service grade gloves, insert dry
Sani-Sponge™ (kit P/N 00132068). Next, insert SaniSponge soaked in Nu-Calgon IMS-II sanitizer solution.
Push both Sani-Sponges down ice transport tube with
supplied pusher tube (Fig. 9).
11. Reconnect coupling. Press power switch ON. Ice pushes
Sani-Sponges through tube (Fig. 11).
12. Place a sanitary (2 gallon or larger) container in bin
or dispenser to collect Sani-Sponges and ice for
10minutes. Collect 5.5 lb (3 kg) of ice from unit. Discard
ice and Sani-Sponges (Fig. 12).
Fig. 11
Fig. 12
Horizon 1650R/N Ice Machines 11
Page 12
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 (22 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 Horizon 1650R/N Ice Machines
Page 13
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.
Additional sensors are incorporated in the reservoir for alarm and cleaning/ ushing conditions.
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 10ppm.
Water system diagram
Water level diagram
Normal
operating
range
Alarm LO
Normal LO
Common
Normal HI
Horizon 1650R/N Ice Machines 13
Page 14
Electrical system
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 green light labeled POWER indicates power to the machine. A ashing green light labeled CPU is normal and
indicates that the Central Processing Unit “heart beat” is working. All other normal operation status indicators are
covered as follows:
Ice machine disposition Operating conditions
Legend:
ONOFF
ON or OFFFLASHING
1. Ice machine is making ice.
AUGER ON
REFRIG ON
PURGE
TIME DELAY
CLEANING
SERVICE
HI AMPS
DRAIN CLOG
HI WATER
CPU
LO WATER
2. Ice machine is not making ice.
AUGER ON
REFRIG ON
PURGE
TIME DELAY
CLEANING
SERVICE
HI AMPS
DRAIN CLOG
HI WATER
CPU
LO WATER
3. Ice machine is not making ice.
AUGER ON
REFRIG ON
PURGE
TIME DELAY
CLEANING
SERVICE
HI AMPS
DRAIN CLOG
HI WATER
CPU
LO WATER
LOW BIN
LOW BIN
LOW BIN
POWER
POWER
POWER
1. Normal running.
2. Normal time delay. When the bin lls with ice, the LOW BIN
light goes out and the refrigeration and auger drive systems
immediately shut down. 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.
3. Normal purge indicator. After a selected period of ice
making time has elapsed (1 or 2 hours), the ice machine will
automatically self- ush. The refrigeration system will shut
down but the gear motor will continue to run. After the ush is
complete the machine will re ll and start without a time delay.
14 Horizon 1650R/N Ice Machines
Page 15
Test points:
The Horizon PC board incorporates on-board test points that can be used to determine various electrical outputs.
The test point holes allow a standard probe to be inserted for quick voltage measurement.
Error faults:
The Horizon PC board monitors various operating parameters including high pressure, auger gearmotor amperage
limits, clogged drain, and high 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.
Note: there are two types of LO WATER and HI AMPS errors as listed below.
Soft errors:
HI AMPS: The PC board monitors the amperage of the auger motor. Should the gear motor experience current
draw above the 8.4 amps limit the machine will shut down and the TIME DELAY, HI AMP, and SERVICE LED’s will
be illuminated. After the time delay the machine will restart and the TIME DELAY, HI AMP, and SERVICE LED’s 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 120 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.
DRAIN CLOG: The drain clog sensor, located in the plastic drain pan behind the drain solenoid, 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 rise to
the sensor, especially during a self- ushing purge cycle.
Hard error:
HI AMPS:
1. “Two strikes” feature. If the gearmotor has a second HI AMP occurrence during the countdown period (6 hours
after a HI AMP time delay) a hard error will occur and the HI AMP and SERVICE LED’s will be illuminated.
2. No current. To prevent the refrigeration system from running without gearmotor rotation the PC board will indicate
HIGH AMP and SERVICE if the drive relay is energized and there is no current draw.
LO WATER:
1. There is a sensor in the water reservoir that reaches down to the very bottom. The machine will not start if water is
not present at this sensor.
2. A hard error will occur should water not be present within 60 seconds of power up or if the sensors are
disconnected or damaged.
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.
Comp/Sol output:
The output for the compressor is labeled COMP/SOL.
Horizon 1650R/N Ice Machines 15
Page 16
Wiring diagram, evaporator unitEvaporator unit wiring diagram
COMPRESSOR EQUIPPED WITH AN INTERNAL OVERLOAD
PROTECTOR. ALLOW TIME FOR RESET.
USE COPPER CONDUCTORS ONLY.
COMPRESSOR
CONTACTOR
COMPRESSOR
TERMINAL
S
COIL
C
CRANK CASE
R
HP
HEATER
COMPRESSOR
CONTACTOR
BLACK
RED
LP
YELLOW
3-phase condensing unit wiring diagram
DT
P1
L1T2L2
T1
FAN 1
FAN 2
FC
L2
L1
L3T3T1F1
L3
T3
WITH BLEEDER
BLACK
RED
YELLOW
F2
START
CAPACITOR
RESISTOR
POTENTIAL RELAY
4
5
6
2
1
RUN
CAPACITOR
COMPRESSOR
CONTACTOR COIL
POWER SUPPLY
230-60-3
COMPRESSOR
TERMINAL
L3
L2
L1T1
GRD
C
HPLP
T3
T2
CRANK CASE
HEATER
BLACK
D.T.
TO "Y-OUT"
AT PHASE
MONITOR
TERMINAL
BOARD
A
P1
T1L1T2
FAN 1
FAN 2
TO "230 VAC"
B
AT PHASE
MONITOR
A
Y Y-
OUT
FFC
C
C115
ICM402
3 PHASE
MONITOR
L1 L2 L3
TO "L2"
AT TE RMINAL
BOARD
TO "L1"
B
AT TERMINAL
BOARD
230
VAC
VAC
TO "C"
C
AT PHASE
MONITOR
L1
L2L3T3T1F1F2
TO "P1"
AT TERMINAL
BOARD
L2
L3
T3
SR
RED
YELLOW
Horizon 1650R/N Ice Machines 17
Page 18
Mechanical system
Evaporator disassembly
1. Press PURGE button to purge evaporator, and then turn
power OFF.
2. Unscrew and remove stream divider as shown.
3. Unplug and remove gearmotor as shown.
4. Remove all traces of petrol-gel from the auger shaft.
Fig. 13
Fig. 14
Fig. 15
5. Unscrew and disconnect transport tube from louvered
docking assembly.
6. Unplug sensor at the electrical box.
7. Remove vent tube from shuttle housing as shown.
18 Horizon 1650R/N Ice Machines
Page 19
8. Unscrew and disconnect transport tube from louvered
docking assembly.
9. Unplug sensor at the electrical box.
10. Remove vent tube from shuttle housing as shown.
11. Remove and discard mating ring and seal.
12. Carefully remove auger.
Fig. 16
Fig. 17
Fig. 18
Evaporator reassembly
1. Remove and inspect O ring seal. Discard if damaged in
any way.
2. Clean O ring groove. Lubricate O ring with petrol-gel and
reinstall.
Horizon 1650R/N Ice Machines 19
Page 20
3. Press new mating ring into main housing as shown.
Lube
with soap
touch
Do not
Cardboard
disc
4. Lube the shaft with liquid soap in the area shown and
slip on seal and spring.
Note: Do not touch the sealing surfaces. Use cardboard disk to
install.
5. Reinstall main housing as shown.
Fig. 19
Fig. 20
Fig. 21
6. Orient auger shaft with keyway in the upward position.
7. Force main housing into position against evaporator and
Note: Shuttle housing
removed for clarity
place 1/4" (7 mm) diameter Phillips screwdriver into hole
in the auger shaft.
8. Replace V-band clamp as shown.
9. Replace nut on V-band clamp and tighten.
10. Remove screwdriver.
20 Horizon 1650R/N Ice Machines
Page 21
11. Reconnect transport tube to louvered docking assembly.
Apply
petrol-gel
12. Plug sensor in at the electrical box.
13. Reconnect vent tube to the shuttle housing as shown.
14. Apply a coat of petrol-gel to the auger shaft.
15. Install gearmotor, making sure that insulation is properly
seated between gearmotor and main housing as shown.
16. Firmly tighten four gearmotor bolts in place.
Fig. 22
Fig. 23
Fig. 24
14. Insert a bolt into the auger shaft and nger tighten.
15. Using a wrench, rotate the shaft clockwise to align the
keyways in the gear housing and the shaft so as to
accept the key.
16. Insert the key into the keyway.
Horizon 1650R/N Ice Machines 21
Page 22
17. Remove bolt and reinstall the washer and bolt. Place
Apply
petrol-gel
retainer over bolt and secure with nut and washer.
18. Lubricate body of stream divider with petrol-gel and
reinstall.
19. Plug gearmotor power cord into electrical box
Fig. 25
Fig. 26
22 Horizon 1650R/N Ice Machines
Page 23
Refrigeration system
Condenser unit operation
The condensing unit is weatherproof and equipped to operate in ambient temperatures from -2 0 F to 120 F
(-29 C to 48.9 C). The condensing unit is controlled by a low pressure control, which works in concert with a
refrigerant solenoid valve on the evaporator module. On start-up, the refrigerant solenoid valve opens and suction
pressure rises above the “on” set point of the control. The compressor and fan turn on and the refrigeration system
operates. Upon shut down, the refrigerant solenoid closes. The compressor will pump down the ice machine
evaporator and suction line until the low “off” set point is reached, at which point the compressor and fan will turn off.
Low ambient operation: Reliable operation at low outdoor ambient temperature is achieved with a pumpdown cycle,
a crankcase heater and a head pressure control valve. When the outdoor ambient falls, the condensing pressure
falls. This causes the discharge pressure to fall as well. When the discharge pressure falls below the dome pressure,
the valve modulates open to the discharge port which allows discharge gas to bypass the condenser. Mixing the
discharge gas with the liquid creates a high pressure at the condenser outlet, reducing the ow and causing liquid
to back up in the condenser. Flooding the condenser reduces the area available for condensing. This reduction in
effective condenser surface area results in a rise in condensing pressure. During summer conditions, the discharge
pressure is high, thus closing the discharge port of the valve. Hence, there is full liquid ow from the condenser to
the receiver.
A check valve is installed in the liquid line between the receiver and the condenser to prevent liquid migration from
the receiver to the condenser during the off cycle. The low pressure control will start the condensing unit anytime the
low side pressure rises above the set point and pump the refrigerant out until the pressure falls to the set point. The
crankcase heater, which is energized whenever the condensing unit has power, keeps the compressor oil warmer
than the coldest location in the system. This minimizes off cycle refrigerant migration. If power to the condensing unit
is interrupted after the system is charged, the compressor should not be started unless the crankcase heater has
been energized for at least 24 hours immediately prior to compressor startup. However the compressor can safely be
started during the refrigeration system charging process (without the warm-up period) once sufficient refrigerant is in
the system to maintain a positive pressure on the suction side of the compressor.
Under normal ambient operating conditions the left side condenser fan motor, when viewing the outdoor condensing
unit from the compressor side, is not energized; therefore,the fan will pinwheel. During hot summer days, at elevated
temperatures, the left side condenser fan will be energized to maintain the BTU efficiency of the condensing unit.
For additional information, please reference Horizon ice machine installation instructions for remote condensing units.
1650 0 – 50 ft (0 – 15.2 m) 11 lb (4.9 kg)
50 - 75 ft (15.2 - 22.9 m) 12 lb (5.4 kg)
75 - 100 ft (22.9 - 30.5 m) 13 lb (5.9 kg)
100 ft+ (30,5+m) Not Recommended
Horizon 1650R/N Ice Machines 23
Page 24
Refrigeration system diagram
TYPICAL
CONDENSING UNIT
low side service valve
with service port
condenser
head control valve, 180 PSI
EVAPORATOR UNIT
sight glass
high side service valve
with service port
compressor
check valve
high side
service port
filter-drier
heat exchanger
high side
refrigeration
line run
filter-drier
receiver
14 pounds
filter-drier
sight glass
high side
service valve
with service port
low side
service valve
with service port
High pressure vapor
thermostatic
expansion
valve
High pressure liquid
solenoid valve
low side
service port
Low pressure liquid
high side
service valve
with service port
low side
service valve
with service port
Low pressure vapor
low side
refrigeration
line run
24 Horizon 1650R/N Ice Machines
Page 25
Refrigerant replacement requirements
1. Non-contaminated refrigerant removed from any Follett refrigeration system can be recycled and returned to
the same system after completing repairs. Recycled refrigerant must be stored in a clean, approved storage
container. If additional refrigerant is required, virgin or reclaimed refrigerant that meets ARI standard 700-88
must be used.
2. In the event of system contamination (for example, a compressor burn out, refrigerant leak, presence of
non-condensibles or moisture), the system must be repaired, evacuated and recharged using virgin or reclaimed
refrigerant that meets ARI standard 700-88.
3. Follett Corporation does not approve of recovered refrigerants. Improper refrigeration servicing procedures will
void the factory warranty.
Evacuation
Evacuate the system to a level of 500 microns. When the 500 micron level is reached, close valves and both manifold
and shut down the vacuum pump. Allow the system to sit for approximately 20 minutes. During this period the system
pressure should not rise. If the system pressure rises and stabilizes there is moisture in the system and further
evacuation is needed. If the pressure continues to rise check the system for leaks.
Ambients (evaporator unit) Minimum Maximum
Air temperature
Water temperature2 45 F/7 C 90 F/32.2 C
1
Ambient air temperature is measured at the air-cooled condenser coil inlet.
2
Ambient water temperature is measured in the ice machine oat reservoir.
1
50 F/10 C 100 F/37.8 C
Ice capacity test
Ice machine production capacity can only be determined by weighing ice produced in a speci c time period.
1. Replace all panels on ice machine.
2. Run ice machine for at least 15 minutes.
3. Weigh and record weight of container used to catch ice.
4. Catch ice for 15 or 20 minutes.
5. Weigh harvested ice and record total weight.
6. Subtract weight of container from total weight.
7. Convert fractions of pounds to decimal equivalents (ex. 6 lb 8 oz = 6.5 lb).
8. Calculate production using following formula:
1440 min. x wt. of ice produced
= Production capacity/24 hr. period
Total test time in minutes
9. Calculated amount per 24 hours should be checked against rated capacity for same ambient and water
temperatures in Ice Production Tables.
Horizon 1650R/N Ice Machines 25
Page 26
“Bin full” detection system
The Follett Horizon ice machine incorporates a unique “bin full” detection system, that consists of the shuttle and
actuator. The shuttle incorporates a ag and sensor. Referencing the gure below, the normal running position of
the ag is down, out of the sensor. When the bin lls to the top and ice can no longer move through the tube, the
machine will force the shuttle ag up into the sensor, shutting the machine off. The shuttle actuator, located above
the ice bin allows the ice to curl up within it when the bin is full to contain any forces. In this way, there are no loads
generated that would tend to lift off the lid of the bin.
Shuttle ag and sensor
Shuttle actuator
Running
Off
Running
26 Horizon 1650R/N Ice Machines
Off
Page 27
Troubleshooting
FLASHINGON or OFF
Legend:
OFFON
Please see “Service” section for a description of each function.
Tecumseh Condensing Unit Date Code C0713 and before
Order parts online
www.follettice.com
Side View
16
15
17
10
16
5
11
14
7
18
Top View
10
8
1
14
4
11
2
7
5
6
18
19
20
12
13
17
4
3
6
9
15
12
13
Reference #DescriptionPart #
1Shroud00155937
2Condenser00977488
3Head pressure control valve00977496
4Condenser fan motor00173070
5Condenser fan guard00123067
6Receiver00110627
7Receiver service valve00173047
8Service valve, suction line00977504
9Service valve, discharge line00175935
10Filter drier, liquid00175869
11Compressor (includes start and run capacitors, relay, suction and liquid drier)00969071
12Shut-off valve, suction line00107078
13Shut-off valve, liquid line00107060
14Crankcase heater00977512
15Sight glass00175885
16Condenser fan blade00173088
17Filter drier, suction00991075
18Heat exchanger00977520
19Contactor00155952
20Low pressure switch00173104
Not shownCheck valve00175893
Not shownStarting relay00110585
Not shownGasket, receiver service valve00175901
Not shownBaffle, shroud00173096
Not shownRun capacitor00977462
Not shownStarting capacitor00977470
Not shownHigh pressure switch00173112
Not shownFan cycling switch00173120
38 Horizon 1650R/N Ice Machines
Page 39
Single-phase condensing unit
Tecumseh Condensing Unit After Date Code C0713
Order parts online
www.follettice.com
Side View
5
16
14
8
21
13
17
3
Top View
15
19
1
8
4
6
7
18
13
4
22
2
5
11
9
10
12
7
Reference #DescriptionPart #
1Shroud01018290
2Condenser00185843
3Head pressure control valve01021401
4Condenser fan motor01018266
5Condenser fan guard00123067
6Receiver00991034
7Filter drier, liquid00998252
8Compressor (includes start and run capacitors, relay, suction and liquid drier)01037027
9Shut-off valve, suction line00977504
10Shut-off valve, liquid line01036805
11Sight glass01036771
12Condenser fan blade00173088
13Filter drier, suction00991075
14Contactor00155952
15Low pressure control01018316
16Starting relay, with screws01038843
17Suction valve01036797
18Discharge valve01036789
19Process valve0103682
20Run capacitor00977462
21Starting capacitor01036755
22Heat exchanger00977520
Not shownCheck valve00175893
Not shownHigh pressure switch01018308
Not shownFan cycling switch01021393
Not shownCrankcase heater01036763
Note: Overload is internal to compressor.
20
12
39 Horizon 1650R/N Ice Machines
Page 40
3-phase condensing unit
6
7
3
4
1
4
2
5
8
9
10
11
13
7
8
13
5
14
15
12
16
12
17
18
Order parts online
www.follettice.com
Top View
Side View
Reference #DescriptionPart #
1Shroud01018290
2Condenser00185843
3Head pressure control valve00110619
4Condenser fan motor01018266
5Condenser fan guard00123067
6Receiver00991034
7Filter drier, liquid00998252
8Compressor00998237
9Shut-off valve, suction line00107078
10Shut-off valve, liquid line00107060
11Sight glass00175885
12Condenser fan blade00173088
13Filter drier, suction00991075
14Contactor00155952
15Low pressure control00991109
16Phase monitor00991117
17Suction valve01036797
18Discharge valve01036789
Not shownCheck valve00175893
Not shownHigh pressure switch00173112
Not shownFan cycling switch00173120
Harmony, Ice Manager, SafeCLEAN, Sani-Sponge and Vision are trademarks of Follett Corporation
Chewblet, RIDE and Follett are registered trademarks of Follett Corporation, registered in the US.
801 Church Lane • Easton, PA 18044, USA
Toll free (877) 612-5086 • +1 (610) 252-7301
www.follettice.com