Follett 25CI425A-L Service Manual
Symphony Plus™ 25 and 50 Series
Ice and Water Dispensers
25CI425A/W, 25HI425A, 50CI425A/W, 50HI425A
Installation, Operation and Service Manual
25/50CI425A/W-SI Countertop
Ice-only Dispenser with
SensorSAFE™ Dispensing
25/50CI425A/W-S Countertop Dispenser
with SensorSAFE™ Dispensing
25/50CI425A/W-LI Countertop Ice-only
Dispenser with Lever Dispensing
25/50CI425A/W-L Countertop Dispenser
with Lever Dispensing
25/50HI425A-SI Wall Mount
Ice-only Dispenser with
SensorSAFE Dispensing
25/50HI425A-S Wall Mount Dispenser
with SensorSAFE Dispensing
Following installation, please forward this manual
totheappropriate operations person.
801 Church Lane • Easton, PA 18040, USA
Toll free (877) 612-5086 • +1 (610) 252-7301
www.follettice.com
Order parts online:
www.follettice.com
01033679R03
Contents
Welcome to Follett. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3
Before you begin .......................................................................... 3
Specications ..............................................................................4
Electrical ................................................................................ 5
Ambient ................................................................................. 5
Plumbing ................................................................................ 5
Ventilation clearances ...................................................................... 5
Uncrated weight .......................................................................... 5
Installation ................................................................................. 6
Before you begin .......................................................................... 6
Installing countertop dispensers with rear exiting utilities (no legs) ................................... 6
Installing countertop dispensers with bottom exiting utilities ........................................ 7
Installing wall mount dispensers ..............................................................8
User information ........................................................................... 11
How the dispenser works ...................................................................11
Cleaning/descaling and sanitizing ............................................................ 11
Weekly ................................................................................ 12
Monthly ................................................................................ 12
Semi-Annually (more often if conditions dictate) ................................................ 12
Service ................................................................................... 15
Ice machine Operation (all models) .......................................................... 15
The icemaking process .................................................................... 15
Water system ........................................................................... 16
Wiring diagram .......................................................................... 18
Ice machine operational and diagnostic sequences ............................................. 20
Diagnostic Stages ........................................................................ 25
Refrigeration system ...................................................................... 30
Dispenser troubleshooting .................................................................. 32
Lever model troubleshooting guide ..........................................................32
SensorSAFE model troubleshooting guide .................................................... 32
Ice machine removal instructions ............................................................. 33
Evaporator disassembly ................................................................... 37
Evaporator reassembly .................................................................... 38
Gearmotor replacement ................................................................... 38
Replacement parts ......................................................................... 39
Dispenser exterior ........................................................................39
Wheel motor and drive system .............................................................. 40
Dispense chute and splash panel (models with SensorSAFE infrared dispensing) ..................... 41
Dispense chute and splash panel (models with lever dispensing) ..................................42
Dispenser electrical box – SensorSAFE models ................................................43
Dispenser electrical box – lever models ....................................................... 44
Water and drain ......................................................................... 45
Water treatment accessories for Symphony Plus ice and water dispensers ........................... 46
Air-cooled ice machines ................................................................... 47
Water-cooled ice machines. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 49
Evaporator replacement parts .............................................................. 51
Ice machine electrical components ............................................................
2 25CI425A/W, 25HI425A, 50CI425A/W, 50HI425A
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 that same degree of service, we ask that you take
a moment to review the installation portion of this manual before beginning to install the unit. Our installation
instructions are designed to help you achieve a trouble-free installation. Should you have any questions or require
technical help at any point, please call our technical service group at (877) 612-5086 or
(610) 252-7301.
Note: To expedite assistance, all correspondence or communication MUST include the model number, serial
number and complete and detailed explanation of the problem.
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 ice dispensing equipment. Following is an explanation of the
different model numbers.
25CI425A-LI
I = ice-only; no water
Dispense actuation, L = lever, S = SensorSAFE
Condenser type, A = air-cooled, water-cooled
Ice machine capacity in lbs per day
Ice machine location, I = integral
Dispenser conguration, C = countertop, H = wall mount
Approximate storage capacity in lbs
CAUTION!
§ Do not tilt any unit further than 30° off vertical during uncrating or installation.
§ Dispenser bin area contains mechanical, moving parts. Keep hands and arms clear of this area at all times. If
access to this area is required, power to unit must be disconnected rst.
§ Follett recommends a Follett water lter system be installed in the ice machine inlet water line (standard capacity
#00130299, high capacity #00978957, carbonless high capacity #01050442).
§ Prior to operation clean and sanitize the dispenser in accordance with instructions found in this manual.
§ Ice is slippery. Be sure counters and oors around dispenser are clean, dry and free of ice.
§ Do not block right side air intake or top air exhaust.
25CI425A/W, 25HI425A, 50CI425A/W, 50HI425A 3
Specications
Countertop
25CI400A/W
36"
(91.5 cm)
50CI400A/W
40"
(101.6 cm)
Wall mount
Front View
21" (53.4 cm) 24" (61 cm)
14.25"
(36.2 cm)
AIR INTAKE
AIR EXHAUST
Right Side View Rear View
3/8" FPT
condenser
inlet (watercooled only)
3/8" FPT
condenser
outlet (watercooled only)
3/4" FPT
drain
10.5"
(26.7 cm)
23"
(58.5 cm)
NEMA
5-15
0.88 (23 mm)
3/4 MPT MALE
Front View Right Side View Rear View
21.5" (54.6 cm)
24.5" (62.2 cm)*
DRAIN
10.5"
(26.7 cm)
3/8" water
inlet
2.63" (6.6 cm)
1.38" (3.5 cm)
2.56" (6.5 cm)
5.69" (14.4 cm)
7.69" (19.5 cm)
25HI400A/W
36.5"
(92.7 cm)
50HI400A/W
40.5"
(102.9 cm)
AIR INTAKE
* Includes .5” (13 mm) for bracket supplied with unit.
AIR EXHAUST
14.25"
(36.2 cm)
17"
(43.2 cm)
NEMA
5-15
21.5" (54.6 cm)
4 25CI425A/W, 25HI425A, 50CI425A/W, 50HI425A
Electrical
§ 115 V, 60 Hz, 1 phase, 11.0A
§ Connect to a 15A dedicated circuit.
§ Furnished with 7 ft (2 m) power cord with a 90° NEMA hospital grade 5-15 plug.
Ambient
Air temp* 100 F/38 C Max. 50 F/10 C Min. (Best performance below 80 F (27 C)
Water temp
†
90 F/32 C Max. 45 F/7 C Min. (Best performance below 70 F (21 C)
Water pressure 70 P.S.I./5Bar Max. 10 P.S.I./0.7 Bar Min.
* Ambient air temperature is measured at the air-cooled condenser coil inlet.
†
Ambient water temperature is measured in the ice machine oat reservoir.
Plumbing
Connections 25/50CI425A Rough-ins 25/50HI425A
Dispenser drain 3/4" MPT Air-cooled 3/4" FPT
Water inlet 3/8" FPT 3/8" FPT
Condenser inlet Water-cooled 3/8" FPT N/A
Condenser outlet Water-cooled 3/8" FPT N/A
Note: Water shut-off recommended within 10 ft. (3m) of dispenser. Drain to be hard-piped and insulated. Maintain at
least 1/4" per foot (20mm per 1m) run of slope.
Ventilation clearances
Air-cooled Water-cooled
Required for ventilation 3" (77 mm) each side N/A
Suggested for service 12" (30.5 cm) top,
6" (15.3 cm ) left side
Note: Do not block right side air intake or right side air exhaust.
12" (30.5 cm) top
Uncrated weight
§ 25/50 CI425A/W (countertop): 215 lbs. (98 kg)
§ 25/50 HI425A/W (wall mount): 230 lbs. (105 kg)
25CI425A/W, 25HI425A, 50CI425A/W, 50HI425A 5
Installation
Before you begin
§ All dispensers must be installed level in both directions to ensure proper operation.
§ Provide ventilation clearances mentioned above.
§ Countertop units provide the option of taking utilities out bottom or back of dispenser (on wall mount units and
countertop units with legs, utilities exit from back).
§ Wall mount model utilities exit through back of dispenser only..
§ Directions for each installation follow.
WARNING!
§ DO NOT LIFT UNIT AT THESE
POINTS. Panels will not support
weight of unit
§ Failure to follow warning may
result in equipment damage or
personal injury
Installing countertop dispensers with rear
exiting utilities (no legs)
1. Position dispenser in desired location.
2. Mark dispenser outline on counter and
remove dispenser.
3. Drill four 7/16" holes in counter to anchor
dispenser to counter (Fig. 1).
4. Apply a thick bead approximately 1/4" (7 mm)
diameter of NSF listed silicone sealant (Dow
Corning* RTV-732 or equivalent) 1/4" (7 mm)
inside marked outline of dispenser.
5. Reposition dispenser on counter and secure
to counter with four 3/8"-16NCbolts.
6. Smooth excess sealant around outside of
dispenser.
7. Make utility connections (Fig. 2).
CAUTION!
§ Do not connect water-cooled condenser outlet line
to the dispenser drain line.
8. Turn on water supply and check for leaks.
9. Clean and sanitize dispenser and ice machine
before putting into service.
10. Turn power on and allow ice machine to
produce ice.
Fig. 1 Countertop anchoring locations
1.56"
(40 mm)
4X
12.50"
(31.8 cm)
.50"
(13 mm)
Ø.375"
(10 mm)
hole
20" (50.8 cm)
Fig. 2 Utility connections as viewed from top for
countertop back access
condenser outlet
3/8" FNPT
condenser inlet
3/8" FNPT
potable water
3/8" FNPT
drain
3/4" MPT
power
* Dow Corning is a register trademark of Dow Corning Corporation in the United
States and other countries
6 25CI425A/W, 25HI425A, 50CI425A/W, 50HI425A
Installing countertop dispensers with bottom
exiting utilities
WARNING!
§ A sturdy work surface capable of supporting the
entire dispenser must be used.
§ The work surface must be large enough to
accommodate height of dispenser.
§ Failure to provide proper support may result in
personal injury.
1. Position dispenser with dispense chutes facing
upward on sturdy work surface (Fig. 3).
2. Move drain tting from back of dispenser and
mount (Fig. 4.1).
3. Cut drain tube to length and attach to barbed
connection (Fig. 4.2).
4. Move inlet water tting from back of dispenser
and mount (Fig. 4.3).
5. Cut water tubing to length and re-insert into
water tting.
6. Water-cooled only. Disconnect internal
condenser water inlet and outlet ttings.
7. Water-cooled only. Relocate water inlet and
outlet ttings and reconnect (Fig. 4.4). Note:
The water inlet is connected to the condenser;
the outlet line is connected to the water
regulating valve.
8. Remove the drain plug from the internal drain
line connection point and relocate to back of
dispenser and reconnect.
9. Raise the dispenser upright and position in
desired location.
10. Mark dispenser outline on counter and remove
dispenser.
11. Cut countertop utility opening and drill four
7/16" holes to anchor dispenser to counter
(Fig. 5).
12. Apply a thick bead approximately 1/4" (7 mm)
diameter of NSF-listed silicone sealant (Dow
Corning* RTV-732 or equivalent) 1/4" (7 mm)
inside marked outline of dispenser.
13. Reposition dispenser on counter and secure to
counter with four 3/8"-16NCbolts.
14. Smooth excess sealant around outside of
dispenser and make utility connections
through countertop cutout.
Fig. 3
Fig. 4
2
TRIM DRAIN TUBE FOR
NEW DRAIN FITTING
LOCATION.
Fig. 5
4X
Ø.375"
(10 mm)
hole
14.00"
(35.6 cm)
16.00"
(40.7 cm)
1
5
1.56"
(4.0 cm)
21.00"
(53.3 cm)
20.00"
(50.8 cm)
Cutout
connections
through
bottom
5.00"
(12.7 cm)
min.
3
4
0.50"
(13 mm)
1.56"
(4.0 cm)
2.50"
(6.36 cm)
(31.8 cm)
Water cooled
only
16.50"
(41.9 cm)
12.50"
7.00"
(17.8 cm)
CAUTION
§ Do not connect water-cooled condenser outlet line
to the dispenser drain line.
15. Turn on water supply and check for leaks.
16. Clean and sanitize dispenser and ice machine.
1 7. Turn power on and allow ice machine to
produce ice.
25CI425A/W, 25HI425A, 50CI425A/W, 50HI425A 7
Installing wall mount dispensers
Front View
Front View
SIDE VIEW
WARNING!
§ Wall mount dispensers are intended to be mounted
above a sink, eliminating the need for a drain pan.
§ Before beginning installation verify that the sink size
and location meet the requirements shown in Fig. 6.
§ If requirements are not met, a drain pan must be
used to prevent ice and water from falling on counter
or oor.
§ FAILURE TO TAKE THESE PRECAUTIONS
COULD RESULT IN SLIPS AND FALLS ON WET
FLOORS
Fig. 6 – Minimum sink requirements (without drain
pan), front view
Sink centered
below chutes
Sink centered
below dispenser
21.50"
(54.7 cm)
14.25"
(36.2 cm) min.
21.50"
(54.7 cm)
23.00"
(58.5 cm) min.
Fig. 7 – Minimum sink requirements (without drain
pan), side view
24.36" (61.9 cm)
25HI425
35.88" (91.1 cm)
50HI425
39.88" (101.3 cm)
17.01"
(43.2 cm)
18.92"
(48.1 cm)
30.00" (76.2 cm)
MIN DISTANCE TO SINK FRONT
18.00" (45.7 cm)
SUGGESTED POWER
CORD ROUTING
8 25CI425A/W, 25HI425A, 50CI425A/W, 50HI425A
1. Locate wall bracket mounting position relative
to wall studs (Fig. 8). Install the supplied
wall bracket with six 3/8" diameter fasteners
(Fig.10.1).
Note: Three holes are available at each fastening
site to allow capture of studs or supports
within the wall.
2. Locate and cut utility hole (Fig. 10.2) in wall
using Fig. 9 dimensions.
3. Rough in utilities. Wall mount bracket
dimensions can be used as a template.
§ Water: 1/2" FNPT
§ Drain: 3/4" MPT
4. Lift dispenser onto wall bracket positioning
unit so that hook on back of dispenser is
captured by wall bracket support angle
(Fig.10.3).
5. Install two 1/4" X 20 screws through bottom of
wall bracket into bottom of dispenser to secure
dispenser to wall bracket (Fig. 10.4).
6. Install supplied 1/2" MPT X 3/8" push-in
adapter onto 1/2" FNPT water supply.
Fig. 8 – Wall bracket location guide
TOP VIEW
1.00" (25 mm)
ANCHOR POINTS
0.438" (11 mm)
CLEARANCE
12.37" (31.4 cm)
3.44" (8.7 cm)
3.53" (9.0 cm)
2.00" (51 mm)
FRONT VIEW
16.00"
(406 mm)
WALL STUDS
WALL STUDS
13" (33.0 cm)
15" (38.1 cm)
0.75"
(19 mm)
19" (48.3 cm)
21" (53.3 cm)
6.00"
(15.2 cm)
25HI425A
50HI425A
25HI425A
50HI425A
Fig. 9 – Wall mount, utility location
FRONT VIEW
1.43" (3.6 mm)
3.99" (10.1 cm)
POTABLE WATER
3/8 COPPER TUBE
6.70" (17.0 cm)
POWER CORD EXIT
10.69" (27.1 cm)
3/4 COPPER TUBE
WALL CUTOUT
Fig. 10 – Wall mount bracket and fastener
requirements
3
1
0.77" (2.0 cm)
2
4
25CI425A/W, 25HI425A, 50CI425A/W, 50HI425A 9
7. Connect supplied 3/8" water line between
water supply and water inlet fitting (Fig. 11.1).
8. Using supplied 3/4" drain tubing and barbed
fittings, connect 3/4" barbed drain elbow tting
on dispenser to 3/4" FNPT drain (Fig. 11.2).
9. Route power cord through utility access hole
to power supply (Fig. 11.3).
10. Turn on water supply and check for leaks.
Fig. 11 – Dispenser bottom view
1
11. Install bottom panel (Fig. 12). Fig. 12
3
2
10 25CI425A/W, 25HI425A, 50CI425A/W, 50HI425A
User information
How the dispenser works
Follett’s 25/50CI series automatic-load ice and water dispensers are equipped with Follett’s 425 lb (181kg)/day
ice machine. In the continuous icemaking process, water freezes to the inside wall of the evaporator. A rotating
stainless steel auger carries the ice to the top of the evaporator where it is compressed and extruded through an
outlet port. The ice is then pushed through a tube to the storage hopper. When the hopper is full, a bin thermostat
opens and shuts the ice machine off. When the dispense mechanism is activated, a dispense motor is turned on,
causing the wheel to turn. This moves ice to the dispense chute where it drops by gravity into the container held
below the chute.
How SensorSAFE infrared dispensing works
Follett’s SensorSAFE infrared dispensing maximizes sanitation and minimizes the possibility of cross-contamination
by eliminating physical contact between the cup or container and dispenser. Sensors in the panel use reected
infrared light to detect the presence of the container and send a signal to a control board which then activates the
appropriate components for ice or water dispensing.
The SensorSAFE infrared dispensing package includes a cleaning switch under the left side of the front cover
which temporarily shuts off dispensing to allow cleaning of the panel and lenses. If the switch is not turned back on
after cleaning, the dispenser automatically resets after two minutes for normal operation.
SensorSAFE infrared dispensing also includes a time limit safety feature which automatically stops ice dispensing
after one minute of continuous dispensing. Dispensing can be resumed by moving the container away from the
dispenser and returning it to the activation zone.
Cleaning/descaling and sanitizing
Follett ice machines and dispensers, and their associated cleaning and sanitizing procedures, are designed for
use with potable water sources. The presence, or suspected presence, of infectious agents may call for additional
measures, including the replacement of components and more comprehensive disinfection measures. Follett
recommends that these cleaning and sanitizing procedures be reviewed with the appropriate infectious agent
subject matter experts to assure complete remediation.
Periodic cleaning/descaling and sanitizing of Follett’s ice and water dispenser and 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.
Follett recommends sanitizing the pressurized water lines prior to cleaning/descaling and sanitizing the ice
machine/dispenser. Follett offers two kits: order P/N 01089572 when a Follett lter system with a pre-lter bowl
is present, or P/N 01089580 when a Follett lter system is not present. Follow the instructions provided with the
respective kits to sanitize the pressurized water lines immediately before cleaning/descaling and sanitizing the ice
machine/dispenser.
Cleaning of the condenser can usually be performed by facility personnel. Cleaning/descaling and sanitizing of
the ice machine system should be performed by your facility’s trained 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.
Recommended cleaning/descaling and sanitizing intervals*
Symphony Plus Frequency
Drain Line weekly
Drain Pan/Drip Pan weekly
Exterior, Water Station Tube as needed
Condenser monthly (air-cooled only)
Dispenser and Components semi-annually
Ice Machine semi-annually
Transport Tube semi-annually
Ice Storage Area/Bin semi-annually
Pressurized Water Sanitizing semi-annually
* Ice machine and dispenser must be sanitized prior to start-up.
25CI425A/W, 25HI425A, 50CI425A/W, 50HI425A 11
Weekly
CAUTION!
§ Do not use solvents, abrasive cleaners, metal scrapers or sharp objects to clean any part of the dispenser.
Dispenser drain pan and drain line
1. Pour 1 gal. (3.8 L) of hot tap water into drain pan to ush drains.
Splash panel front, SensorSAFE infrared dispensing
1. Deactivate dispensing by pressing and releasing clean switch located on left side of unit under top front
cover.
2. Clean lens and splash panel front using a soft cloth and mild, non-abrasive, non-chlorine based cleaner.
3. Reactivate dispensing by pressing and releasing clean switch again.
Monthly
CAUTION!
§ Do not use solvents, abrasive cleaners, metal scrapers or sharp objects to clean any part of the dispenser.
Condenser (air-cooled ice machine only)
1. Use a vacuum cleaner or stiff brush to carefully clean condenser coils of lint and debris to ensure optimal
performance.
Semi-Annually (more often if conditions dictate)
§ A cleaning/descaling and sanitizing procedure should always include both the ice machine and dispenser.
§ Icemaking system can be cleaned/descaled in place.
CAUTION!
§ Wear rubber gloves and safety goggles (or face shield) when handling cleaner or sanitizer mixtures.
§ Use only Follett approved cleaners.
§ It is a violation of Federal law to use Cleaning or Sanitizing solution in a manner inconsistent with their labeling.
§ Do not use solvents, abrasive cleaners, metal scrapers or sharp objects to clean any part of the dispenser.
Cleaning solution: Following manufacturer’s instructions, mix cleaning solution of 1 gal. (3.8L) 100 F (38 C)
water and 7 oz. (198 g) (one 7oz. packet) of Follett SafeCLEAN™ ice machine cleaner/
descaler (P/N00132001).
Sanitizing solution: Following manufacturer’s instructions, mix a sanitizing solution of 1 gal. (3.8 L) 100 F (38 C)
water and 1.6oz. (48 ml) Nu-Calgon IMS-II or IMS-III Sanitizer (P/N 00979674).
Cleaning & Sanitizing Tool Checklist
§ (2) 1.5 Gallon (or larger) Plastic Buckets
§ (2) clean cloths
§ Sanitary gloves
§ Safety Glasses
§ (2) Sani-Sponge™ (P/N 00131524 - single sponge)
§ (1 ) Packet of SafeCLEAN™ (P/N 00132001 - 24 packets)
§ 1.6 oz. of Nu-Calgon IMS-II or IMS-III Sanitizer (P/N 00979674 - 16 . oz. bottle)
12 25CI425A/W, 25HI425A, 50CI425A/W, 50HI425A
Ice Machine and Dispenser
Cleaning/Descaling Procedure
Note: Check drains and drain cup to ensure they are open and owing freely.
1. Remove front cover and turn OFF bin signal switch.
2. Dispense all ice from storage hopper and discard.
Note: CI Models only: remove splash panel.
3. Press CLEAN switch. The MAINTENANCE light will turn on and the machine will drain. Wait for the LOW
WATER light to turn on.
4. Remove lid from cleaning cup and ll (about 1 quart) until cleaning solution completely lls the reservoir.
Place lid back on cup. Save remainder of cleaning solution.
5. CLEANER FULL light will turn on and machine will start cleaning cycle then rinse three times; this
process takes approximately 15 minutes.
6. While ice machine is cleaning/descaling, clean dispenser as follows:
a. Turn OFF dispenser power.
b. Remove hopper lid. (Note: for CT models, remove hopper access cover)
c. Remove knurled nuts from front of storage hopper.
d. Remove stud assembly, baffle, wheel, and any remaining ice.
e. Remove dispense chutes from splash panel.
f. Submerse drain grill in cleaning solution and allow to soak to remove any scale buildup.
g. Wipe stud assembly, baffle, wheel, inside of storage area, dispense chutes, drain grill and drain pan with
damp cloth wrung out in cleaning solution. Thoroughly rinse all parts with damp cloth wrung out with clean
water.
Note: To avoid possible damage to motor assembly, only use a damp cloth to clean storage hopper. Do not
allow water to run through motor shaft hole in bottom of hopper.
7. When machine is nished cleaning, the MAINTENANCE light will turn off.
25CI425A/W, 25HI425A, 50CI425A/W, 50HI425A 13
Sanitizing Procedure
8. Press CLEAN switch. The MAINTENANCE light and LOW WATER light will turn on.
9. Fill cleaning cup until sanitizing solution completely lls the reservoir. Place lid back on cup. Save
remainder of sanitizing solution.
10. CLEANER FULL light will turn on and machine will start sanitizing cycle then rinse three times; this
process takes approximately 15 minutes.
11. While ice machine is sanitizing, sanitize dispenser as follows:
a. Wipe inside of hopper lid, stud assembly, baffle, wheel, inside of storage area, dispense chutes, drain grill
and drain pan with damp cloth wrung out in sanitizing solution.
Note: To avoid possible damage to motor assembly, only use a damp cloth to clean storage hopper. Do not
allow water to run through motor shaft hole in bottom of hopper.
b. Reinstall dispense chutes, wheel, baffle, stud assembly and knurled nuts. (See manual for correct baffle
position.)
12. When machine is nished rinsing, the MAINTENANCE light will turn off. Loosen phillips-head screw on
nozzle connected to evaporator. Remove nozzle from evaporator side only, leave other side of nozzle
connected to transport tube.
13. Place one Sani-Sponge in remaining sanitizing solution.
14. Insert the sponge soaked in sanitizing solution into nozzle then insert a dry sponge into the nozzle.
15. Replace nozzle onto evaporator and tighten screw. Ensure drain is connected to reservoir and vent tubes
are connected to evaporator drain pan.
16. Turn ON bin signal switch. Wait for ice to push sponges through transport tube.
1 7. Collect sponges from ice storage bin.
18. Replace hopper lid (access cover for CT models), machine top, turn ON dispenser power and install front
cover.
19. After 10 minutes, dispense all ice and discard.
14 25CI425A/W, 25HI425A, 50CI425A/W, 50HI425A
Service
Ice machine Operation (all models)
Follett’s ice machine consists of four distinct functional systems:
§ Harvesting system
§ Water system
§ Electrical control system
§ Refrigeration system
These four systems work together to accomplish the production and harvesting of ice. A problem in any one of
these systems will result in improper operation of the entire ice production cycle. When troubleshooting the ice
machine, it is important to analyze the entire system operation to determine which system is not functioning
properly, then pinpoint the component within that system that is malfunctioning. Determine what corrective action
must be taken before making any adjustments or replacing any components.
The icemaking process
The Maestro Plus ice machine uses a stainless steel jacketed evaporator and operates on a continuous freezing
cycle. Water is supplied to the evaporator from the water reservoir where the water level is controlled by conductivity
probes.
When the ice machine is running, a layer of ice forms on the interior surface of the evaporator. This ice is
continuously removed by a slowly rotating (12RPM) auger. The auger carries the ice upward into the cavity
formed by the top bearing housing and the compression loop, where it is compressed to remove excess water.
When the ice reaches the desired hardness it rotates within the cavity and is forced through a discharge port
and compression nozzle and into the ice transport tube. The discharge tube and compression nozzle are slightly
restricted to further compress the ice and produce the desired hardness.
A solid state control board located in the electrical box of the ice machine controls the normal operation of the ice
machine and monitors gearmotor torque. This control board will shut down the ice machine should an over-torque
condition occur. It is very important that you familiarize yourself with the operational sequences detailed in this
manual before attempting to service the ice machine.
water
inlet
evaporator
port
ice transport tube
compression nozzle
auger
25CI425A/W, 25HI425A, 50CI425A/W, 50HI425A 15
Water system
The water level in the evaporator is controlled by a ll solenoid (Fig 13) and level detecting sensors. Water sensing
rods (Fig. 14) 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.
Fig. 13 – Water system diagram
VENT
CLEANING CUP
RESERVOIR FILL
ICE
NOZZLE
SOLENOID
EVAPORATOR
DRAIN PAN
TO DRAIN CUP
Fig. 14 – Water level diagram
B COMMON
C HIGH
A ALARM LOW
D LOW
WATER
RESERVOIR
C
NORMAL OPERATING RANGE
D
WATER SUPPLY
3/8" FPT, 45-90 F (7-32 C)
10-70 PSI (69-483 KPA)
B A
16 25CI425A/W, 25HI425A, 50CI425A/W, 50HI425A
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