Scotsman Flockeneisbereiter MF 86
Page 1
Kälte-Berlin
Am Pfarracker 41
12209 Berlin
Page
Fon: +49 30 74 10 40 22
Fax: +49 30 74 10 40 21
Mail: [email protected]
Internet: www.kaelte-berlin.com
1
SERVICE MANUAL
Der Link zum Scotsman Flockeneisbereiter MF 86 bei Kälte-Berlin
MF 86
Modular
superflakers
MS 1000.28 REV. 02/2008
Page 2
Page 2
TO BE USED JUST
BY THE INSTALLER
Page 3
Page 3
TABLE OF
CONTENTS
Section I
Table of contents
Specifications
8
8
8
8
8
9
9
9
10
11
12
OPERATING INSTRUCTIONS
Pre-start inspection
Start up
Section III
3
4
GENERAL INFORMATION AND INSTALLATION
Introduction
Description
Sealed refrigerant system
Storage bin or ice room
Unpacking and iInspection
Location and levelling
Electrical connection
Water supply and drain connection
Remote condenser and pre-charged line
Final check list
Installation practice
Section II
page
14
14
PRINCIPLES OF OPERATION - HOW IT WORKS
ICE MAKER
Water
Ice
Refrigeration
ELECTRICAL/REFRIGERATION
16
16
16
16
17
ADJUSTMENT, REMOVAL &
REPLACEMENT PROCEDURES
19
Section V
SERVICE DIAGNOSIS
24
Section VI
WIRING DIAGRAMS
Wiring Diagram MF 86 AS
Wiring Diagram MF 86 ASR
26
27
28
Section VII
MAINTENANCE AND CLEANING INSTRUCTIONS
29
Section IV
Page 4
Page 4
SPECIFICATIONS
MF 86 - AIR & WATER COOLED MODEL
Important operating requirements:
MINIMUM
MAXIMUM
• Air temperature
10°C (50°F)
40°C (100°F)
• Water temperature
5°C (40°F)
35°C (100°F)
• Water pressures
1 bar
5 bar
• Electrical voltage variation
• voltage rating
specified on
nameplate
-10%
+10%
Extended periods of operation exceeding these limitations
constitutes misuse under the terms of Scotsman
Manufacturer's Limited Warranty, resulting in a loss of
warranty coverage.
We reserve the right to make product improvement at any
time. Specifications and design are subject to change
without notice.
ice making capacity
AIR COOLED MODELS
10-21
2300
32
2100
38
1900
1700
1500
ICE PRODUCED PER 24 HRS.
2500
AMBIENT TEMPERATURE
Kg.
2700
°C
AMBIENT TEMPERATURE
ICE PRODUCED PER 24 HRS.
Kg.
2700
WATER COOLED MODELS
2500
2300
2100
1900
1700
1500
38
32
27
21
15
10
WATER TEMPERATURE
5 °C
38
32
27
21
15
10
5 °C
WATER TEMPERATURE
NOTE. Daily ice capacity is directly related to condenser air and water inlet temperature, water
temperature to make ice - and age of machine.
To keep your machine performing at its maximum capacity it is necessary to perform periodic
maintenance as outlined on Maintenance & Cleaning Section of this manual.
Page 5
Page 5
SPECIFICATIONS (CONT'D)
Dimensions:
HEIGHT:
HEIGHT (with legs):
WIDTH:
DEPTH:
NET WEIGHT:
1140 mm
1290 mm
1080 mm
780 mm
400 Kg
MF 86 FLAKER - COMPACT-MACHINE SPECIFICATIONS
Model
Cond. unit
Finish
MF 86 AS
MF 86 WS
Air
Water
Stainless Steel
Basic electr.
Air Cooled
Air Cooled
Water Cooled
Air Cooled
230/50/3+N
400/50/3+N
230/50/3+N
400/50/3+N
* At 15°C (60°F) water temperature
Amps
***
13.5
***
14
Refr.
Compr. HP
5
Electric power cons.
Kwh per 24 HR
R 404 A
144
R 404 A
Water req.
lt/24 HR
2400*
26500*
Nr. of wires
***
5 x 2.5 m/m2
***
5 x 2.5 m/m2
Page 6
Page 6
SPECIFICATIONS
MF 86 - AIR REMOTE COOLED MODEL
Important operating requirements:
MINIMUM
MAXIMUM
• Air temperature
10°C (50°F)
40°C (100°F)
• Water temperature
5°C (40°F)
35°C (100°F)
• Water pressures
1 bar
5 bar
• Electrical voltage variation
• voltage rating
specified on
nameplate
-10%
+10%
Extended periods of operation exceeding these limitations
constitutes misuse under the terms of Scotsman
Manufacturer's Limited Warranty, resulting in a loss of
warranty coverage.
We reserve the right to make product improvement at any
time. Specifications and design are subject to change
without notice.
ice making capacity
AIR COOLED MODELS
Kg.
°C
2450
10
2350
2150
2050
32
1950
1850
38
1750
AMBIENT TEMPERATURE
ICE PRODUCED PER 24 HRS.
2250
1650
1550
1450
38
32
27
21
15
10
5 °C
WATER TEMPERATURE
NOTE. Daily ice capacity is directly related to condenser air and water inlet temperature, water
temperature to make ice - and age of machine.
To keep your machine performing at its maximum capacity it is necessary to perform periodic
maintenance as outlined on Maintenance & Cleaning Section of this manual.
Page 7
Page 7
SPECIFICATIONS (CONT'D)
Dimensions:
HEIGHT:
HEIGHT (with legs):
WIDTH:
DEPTH:
NET WEIGHT:
1140 mm
1290 mm
1080 mm
780 mm
400 Kg
MF 86 FLAKER - REMOTE MACHINE SPECIFICATIONS
Model
MF 86
Air
Basic electr.
Air Cooled
Air Cooled
Cond. unit
230/50/3+N
400/50/3+N
Compr. HP
Finish
5
Stainless Steel
Amps
Refr.
***
13.5
R 404 A
Electric power cons.
Kwh per 24 HR
144
Water req.
lt/24 HR
2400*
Nr. of wires
***
5 x 2.5 mm2
Page 8
Page 8
SECTION I
GENERAL INFORMATION & INSTALLATION
INTRODUCTION
This manual provides the specifications and the
step-by-step procedures for the installation, startup, operation and maintenance and cleaning of
the SCOTSMAN Model MF 86 Flaker.
The Model MF 86 is a quality designed,
engineered, constructed and throughly tested
icemaking system, providing the utmost in
flexibility to fit the needs of a particular user.
DESCRIPTION
The Scotsman MF 86 - continuous flow ice
maker - consists of one large capacity flake ice
making system contained within a compact
cabinet entirely in stainless steel. The flake ice
produced is extruded through an ice discharge
opening provided in the rear side of the unit. If the
unit location requires it, the ice spout can be
positioned, as well, to discharge the ice out
through a second opening provided in the left
side of the cabinet. All panels are removable to
allow easy access to electrical and mechanical
components for cleaning and maintenance.
UNPACKING AND INSPECTION
1. Call your authorized SCOTSMAN
Distributor or Dealer, for proper installation.
2. Visually inspect the exterior of the shipping
container and skid and any severe damage
noted, should be reported to the delivering carrier;
and, a concealed damage claim filled in subjetct
to internal inspection, with carrier representative
present.
3. Remove the packing, and remove the
shipping bolts and the shipping base or skid.
4. Remove screws and shipping tape, and
service panels from the cabinet, and inspect for
any concealed damage.
Notify carrier of any concealed damage claims,
as stated in step 2 above.
5. Remove all internal support packing, tape
and wires in machinery compartment.
6. Remove the plastic ice chutes as well as
the plastic ice spout cover.
SEALED REFRIGERANT SYSTEM
To provide quite efficient operation of the ice
maker, the compressor is mounted on rubber
grommets. The water cooled models have a
tube within a tube condenser with water regulating
valve for correct condensing water flow.
The air cooled model has a built-in condenser
with four fan motors, controlled by two pressure
controls. The freezer auger is driven by a gear
motor assy.
The refrigerant used is R 404 A controlled by an
automatic expansion valve.
On request the MF 86 cal also be supplied with
remote condenser and copper refrigerant lines.
7. Check that refrigerant lines do not rub or
touch lines or other surfaces, and that fan blades,
if any, move freely.
8. Check that the Compressor is snug on all
mounting pads.
9. Use clean damp cloth or disposable paper
wiper to pipe clean the exterior surfaces of the
cabinets.
10. See DATAPLATE on the cabinet base and
check that the location source voltage corresponds with the voltage specified on the
dateplate.
STORAGE BIN OR ICE ROOM
Since the MF 86 is a continuous flow type ice
maker and does not have its own attached
storage bin, it is necessary to use an auxiliary bin
or prefabricated ice room for appropriate ice
storage. An insulated ice storage bin or room is
always required, then - according to ice
applications - this can be refrigerated or nonrefrigerated; a weight/volume ratio of 1,8 m3 per
ton must be taken into consideration for correct
ice storage room design which, in any case,
should be dimensioned to accomodate a
minimum of 16 hrs. ice production.
CAUTION. Unproper voltage supplied to
the ice Maker will void your parts
replacement program.
11. Remove the Manufacturer’s Registration
Card from the User Manual and fill in all spaces
including: Model Number and Serial Number
taken from the aluminium plate.
Forward the completed, self addressed,
registration card to the Frimont Factory.
Page 9
Page 9
LOCATION AND LEVELLING
WARNING. This unit must be installed in
an area where it will not freeze and
protected from the elements such as wind,
rain, water spray or drip. Ambient temperature limitations are: 10°C (50°F)
minimum and 40°C (100°F) maximum,
while water temperature limitation are:
5°C (40°F) minimum and 35°C (90°F)
maximum. Ambient and water temperature exceeding these limitations may result
in machine malfunction and the loss of
warranty coverage.
Make sure that the structure on which the ice
maker will be located be on a solid footing and
supports at least 1000 Kgs.
This ice maker is designed for free standing
application only. Do not built it in. Make sure that
location site is well ventilated to ensure correct
operation of air-cooled models that have the
condenser directly behind the front panel. Also
allow 20 cm clearence in back and both side of
the ice maker to be able to easily perform service
inspections and operations.
1. Erection - For elevation of machine to its
stand or location, fork lifttrucks should be used.
2. Position the MF 86 in the selected permanent
location and level the cabinet on both the left-to
right anf front-to-rear direction.
3. Ice chute to convey the ice from the outlet of
the machine to the ice storage area is supplied
with the machine.
4. Thermostat capillary tube must be positioned so that its end extends out the ice chute
opening or the ice deflector and get easily in
contact with the cone formed by the ice deposited
in the storage room, before - anyway - that ice
builds-up in the chute.
Thermostat capillary tube is coiled behind the
control box, it must be routed to follow the ice
chute or ice deflector and protrude for a certain
extension beyond the ice discharge opening in
the storage room. Use caution when routing this
capillary to prevent kink or to bent it excessively.
Coil excess capillary inside ice maker cabinet.
Tape coil to prevent vibration againt another part.
ELECTRICAL CONNECTION
See machine electrical specifications in Unit
Nameplate and at page 3 of this Service Manual
to determine wire size to be used for electrical
supply. This unit must be grounded according to
all Electrical Codes and local ordinances. Provide
a fuse disconnect box within sight and easyreach of the ice maker. Use timed fuses on all
terminals.
The maximum allowable voltage variations should
not exceed ten percent of the nameplate rating,
even under starting conditions. Low voltages can
cause erratic operation and may be responsible
for serious damages to the overload switch and
motor winding.
WARNING. The compressor is equipped
with a crankcase heater which has to to
energized even when the ice maker is
switched-off. So, make sure to connect
the unit with the compressor crankcase
heater constantly energized. After long
inoperative periods remember to give
current to the heater 4 hours before the
ice maker start-up.
WATER SUPPLY AND DRAIN CONNECTIONS
A. AIR-COOLED MODELS: The recommended water supply line is a 3/4 inch O.D. fitting.
Connect to cold water supply line with standard
plumbing fittings, with a shutoff valve installed in
an accessible place between the water supply
and the Cabinet.
A wire mesh strainer is provided inside the fitting.
The strainer protects against large particles of
rust, scale, etc., which may be loosened in the
water supply pipe at the time of installation.
In some cases, a plumbing permit and services of
a licensed plumber will be required.
CAUTION - This ice maker is equipped
with a low water pressure safety device
which, in the event of low water pressure,
will automatically stop the ice maker to
prevent damage. The ice maker will
automatically restart with increased water
pressure.
This ice maker will not operate properly
when water supply temperatures are below
5°C (40°F) and above 35°C (90°F).
B. WATER-COOLED MODELS: On WaterCooled models a separate connection, to the
Condenser is required. A 3/4 inch O.D. fitting is
provided for a separate water inlet line to be
connected and a separate drain line to be
connected.
NOTE. - The WARNING, in the text above
for the Air-Cooled models equally applies
for the Water-Cooled models. In both type
installations, water supply must be
installed to conform with local plumbing
codes. In some cases, a plumbing permit
and services of a licensed plumber will be
required.
C.
WATER DRAIN
The recommended drain tube is a plastic or
flexible tube with 18 mm (3/4") I.D. which runs to
an open trapped and vented drain.
D.
WATER DRAIN - WATER COOLED MODELS
Connected the 3/4" male fitting of the condenser
water drain, utilizing a second flexible hose, to the
open trapped and vented drain.
Page 10
Page 10
WEATHER PROOF AIR COOLED REMOTE
CONDENSER
Installation of the remote air cooled condenser
and pre-charged refrigerant lines
The remote condenser version is similar to the air
cooled standard version with the only difference
of the remote condenser and of the Fan Speed
Control used to supply power to the three fan
motors.
A. Location considerations:
Select the best available place protected from
dirt/dust.
The weather proof remote air cooled condenser
can be installed indoor as well as outdoor and
can operate under the most different conditions
(rain, wing, snow, etc.).
Use the following formula for planning the location
of the condenser and ice machine.
Technical specifications
1.
Remote air cooled condenser fit on proper
brackets for horizontal and vertical
installation. Cooling capacity with T 15K is
17700 Kcal/hr.
2.
Fan motors 220-240/50-60/1 - 135 Watts 0,6 Amps with IP44 protection (against liquids
and solids) and flow rate of 2150 m3/hr.
3.
An Electronic Fan Speed Control set to 16
bar.
4.
Pre-charged refrigerant lines of 10 meters
length equipped with AEROQUIP quick
connections.
5.
6.
Location Limits - Condenser location must
not exceed ANY of the following limits
Maximum vertical drop dd of 1 meter between
the icemaker and the remote condenser.
Maximum vertical rise rd of 3 meters.
Physical line set maximum length between
icemaker and remote condenser is 10 meters.
Limit to max. one rise and one drop.
Limit the calculated distance (CD) as per the
Calculation formula to 18 meters.
Hi pressure safety control (manual reset
type) set to 34 bar.
A = Drop = dd x 6.6
B = Rise = rd x 1.7
C = Horizontal run = hd x 1
Hi pressure control warning light.
CD = A + B + C
hd
Remote Condenser
located ABOVE Ice
Machine
rd
dd
Remote Condenser
located BELOW Ice
Machine
Condenser Distance &
Location Schematic
Page 11
Page 11
B.
Unpacking and inspection:
Visually inspect the exterior of the shipping
container; any severe damage should be reported
to the delivery carrier.
Uncrate the remote condenser and pre-charged
refrigerant lines and inspect for any concealed
damage. Notify carrier of any cancealed damage.
Check that the pre-charged refrigerant linea are
intact, not kinked.
C.
Remote condenser installation
Install and attach the remote condenser to the
floor or to the wall of the building using methods
and practices conform to the local building
requirements.
Remove the control box cover from the remote
condenser and connect the electrical power line
coming from the unit following the wires colors.
NOTE. Cable connecting the unit to the remote condenser is at 230 Volts so it is imperative to have the cable properly protected
inside a plastic or metal tube according to the
local electrical code/standard.
D.
Pre-charged refrigerant lines
The set of pre-cherged refrigerant lines consists
of the 16 mm O.D. gas line and 12 mm O.D. liquid
line with AEROQUIP quick connections too.
Whenever then length of the pre-charged
refrigerant lines are longer then the distance
between the ice maker and the remote condenser
keep the excess portion indoor shaped as a
vertical spiral so to avoid refrigerant trapping.
CAUTION. Each coupling on the precharged refrigerant lines is self-sealed and
should be tightened 1/4 turn more then
snug tight.
ALWAYS USE TWO WRANCHES WHEN
TIGHTENING THESE FITTINGS, ONE AS
BACKUP WRENCH TO PREVENT
TWISTING OF TUBING AND POSSIBLE
KINKING OR LINE RUPTURE.
Connect the gas line coupling to the remote
condenser refrigerant fitting (labelled GAS) and
to the refrigerant fitting on the rear side of the ice
machine. Connect the liquid line coupling to the
remote condenser refrigerant fitting (labelled
LIQUID) and to the refrigerant fitting on the rear
side of the ice machine.
ATTENTION. The inlet of the remote air
cooled condenser (gas) must be always
located above the outlet (liquid) for both
horizontal and vertical installation.
Operating instructions
The remote air cooled condenser version is
operating in the same way as the standard
machine.
The only difference is the operation of the fan
motor.
In place of the fan pressure control operation in
ON-OFF mode, on remote air cooled condenser
version it's installed an electronic fan speed
control.
The fan speed control supplies a variable power
to the fan motors so to modulate their speed and
keep to a constant value the discharge pressure.
Correct adjustment of the fan speed control is 16
bar.
The hi pressure control is used only as a safety
device to switch OFF the operation of the machine
in case of fan motor failure.
FINAL CHECK LIST
1.
Is the Cabinet level? (IMPORTANT)
2. Have all electrical and piping connections
been made?
3. Is there an electrical service disconnect
within sight of the installed machine?
Has the voltage been tested and checked against
the nameplate rating?
4. Is the water supply line shutoff valve installed
near the machine.
5. Have all the wires been checked for
looseness and thightness.
6. Have the Compressor hold down nuts been
checked, to be sure the Compressor is snug on
the mounting pads.
7. Has the owner/user been instructed on how
to operate the Icemaker.
8. Has the Manufacturer’s registration Card
been properly filled out? Check for correct Model
and serial numbers from Serial nameplate, then
mail the completed card to the FRIMONT factory.
9. Check all refrigerant linea and conduit lines,
to guard against vibration or rubbing and possible
failure.
10. Is there at last 20 cm. clearance behind and
around Cabinet for proper air circulation?
11. Is the Icemaker installed indoor in a location
where ambient temperatures are a Minimum of
10°C (50-degrees F.) all year around?
12. Has water supply pressure been checked to
insure a minimum of 1 atm (14 PSI).
13. Is the remote condenser installed per local
building codes, and in a place where it has
adequate ventilation and minimal solar heat gain.
14. Verify that unit lighted switch is in the OFF
position.
15. Switch the main disconnect switch on power
line in the ON position to energize the compressor
crankcase heater well in advance the start-up.
16. Verify that dial of delay timer, in control box,
is set on 5 minutes.
17. Has the owner been given name and
telephone number of the authorized SCOTSMAN
Service Agency.
Page 12
Page 12
INSTALLATION PRACTICE
Page 13
Page 13
INSTALLATION PRACTICE
1
➀
2
➁
3
➂
4
➃
5
➄
6
➅
POWER LINE
HAND DISCONNECT SWITCH
CONTROL TIMER (OPTIONAL)
WATER SUPPLY LINE
HAND SHUT - OFF VALVE
WATER FILTER (NOT SUPPLIED)
7
➀
8
➁
9
➂
WATER INLET LINE W / SEPARATE SHUT - OFF VALVES
WATER DRAIN LINE
OPEN VENTED DRAIN
Page 14
Page 14
SECTION II
OPERATING INSTRUCTIONS
PRE-START INSPECTION
1. Make sure that the electrical power has
been on for at least 4 hours and that compressor
crankcase is warm.
2. From unit left side check to see, through
appropriate sight glass, the oil level in gear box
and also the oil level in compressor crankcase.
3. Verify that drive motor current limiter
GAVAZZI DIB71, located in control box on right
side of contactor, has the following setting.
400V
230V
HYS
LEVEL
6
60% - 1,2 Amps
***
***
DELAY
0,3 - 1,8 sec
***
2. Press unit lighted switch to ON. Unit will
start operating. Verify immediately if auger drive
motor turns the auger (coupling) in
counterclockwise direction.
NOTE. The MF 86 is equipped with a 3
Phase Monitoring Relay. In case the three
phase are connected in wrong way, the
machine doesn't start with the simultaneous
glowing of the 3 Phase Sequence Protector
Warning light. Just reverse two of the three
phases on the main plug so to have the
correct sequence and by so, the start up of
the machine.
3. 15 minutes, after the start up of the drive
motor (yellow led of the Time Delay Relay KT1
blinking), the compressor starts up as well.
4. After two or three minutes of unit operation
observe that flaked ice begins to drop out in the
ice spout.
START-UP
The following procedure can only be started after
pre-start inspection has been properly completed.
1. Open the water supply line shutoff valve.
Observe that water enters the water reservoir,
fills the tube from the reservoir to the evaporator
and then shut-off. Check for leaks.
5. Let the system operate for about 30 minutes.
Check for any excess noises beyond normal
compressor noise:
a) Fan noises when Air-Cooled: blades
touch other surfaces; blades bent; out of
balance.
b) Vibrating type from touching lines.
c) Chattering: lack of water in Freezer.
d) Compressor loose at one or more holddown bolts.
6. If desired, the low side pressure can be
checked, it should be 1.7 atm (25 PSI).
Check to see through liquid sight glass for correct
refrigerant flow and charge.
7. Hold a handful of ice around the ice storage
bin thermostatic control bulb to test shut-off.
Less than one minute is about normal for bulb
shut-off function to cause the ice maker to stop
(Compressor first and drive motor after 15 minutes
delay - yellow led of KT2 blinking).
Remember that unit will resume operation after
15 minutes that bin thermostat has closed its
contacts.
8. There are no adjustments to make, so
replace the panels.
Page 15
9. Throughly explain the owner/user the
significant specifications of the ice maker, the
start-up, operation and attention to pay going
through the procedures in the operating
Page 15
instructions. Answer all questions about the ice
maker, by the owner, and inform the owner of the
name and telephone number of the authorized
SCOTSMAN Service Agency serving him.
Page 16
Page 16
SECTION III
PRINCIPLES OF OPERATION - How it Works
ICEMAKER:
Water
The water supply flows from the building source
through the inline water strainer, enters at the
Cabinet fitting and on to the Water Reservoir.
The water Reservoir functions to maintain a
constant water level inside the Freezer Assembly.
Water from the Water Reservoir enters at the
bottom of the freezer Assembly and is changed
into ice by low temperatures inside the freezer.
Ice
A stainless steel Auger within the Freezer is
powered by a separate drive motor through a
speed reducer and the rotating Auger carriers
the ice upward to the Ice Breaker assy where
excess water is pressed out of the ice, as it is
extruded or flaked out through the Ice breaker.
The flake ice into spout in diverted out through
the ice discharge opening. Moving the manual
ON-OFF toggle switch, to the ON position starts
after 15 minutes the automatic and continuous
icemaking process. When the Ice touches the
Thermostatic Control Bulb, the sensing bulb
shuts off the compressor first and 15 minutes
later the drive motor.
Refrigeration
Beginning at the compressor, the refrigerant R
404 A is compressed into a high temperature
gas.
The discharge line directs this gas to the
condenser. At the condenser (air or water cooled),
the gas is cooled by either air or water and it then
condenses into liquid.
This high pressure liquid then goes through the
liquid line to the expansion valve. The expansion
valve meters liquid refrigerant into the evaporator.
At the evaporator, the refrigerant enters an area
of relatively low pressure where it can easily
"boil-off" or evaporate.
Page 17
Page 17
As it evaporates, it absorbs heat from the
evaporator and whatever is in contact with it
(such as the water inside it).
After the evaporator, the refrigerant, now a low
pressure vapor, goes through the heat exchanger
and suction line back to compressor, where the
cycle is repeated.
ELECTRICAL/REFRIGERATION
The MF 86 Flakers are designed to operate at
400 Volts. 50 Hertz, threephase plus neutral.
Special voltage requirements are available on
special order.
Therefore, always CHECK NAMEPLATE for
electrical information BEFORE proceeding with
electrical wiring connections to the Icemaker.
Cold ambient temperatures and interruptions in
water supply are conditions that can cause
excessively hard ice and overloads within the
Freezer Assembly, which is directly trasmmitted
to the Drivemotor; and in turn, will cause the
intervention of Drive Motor Current limiter.
Spout Switch is mounted on the top of the Ice
Spout and is actuated by the movement of the
spring retained pressure plate. The spout switch
acts as a back-up safety switch, should the
termostatic Control Bulb fail and cause ice to
jam-up in the ice spout. The switch will shutoff the
ice maker when actuated. The Spout Switch can
be manually tested by pressing upward the
pressure plate.
There are other five safety controls in the machine
and are:
The low Pressure Control an automatic reset,
adjustable control, set to electrically open at
0.3 bar (4 PSI) to stop the entire ice maker,
prevents operation at vacuum refrigerant
pressures and restart when rises up to 1 bar
(14 PSI).
Drive Motor Current Relay - Gavazzi DIB71
It senses the intensity at the drive motor, should
this exceed its Amps setting point as per here
below chart, tripping OFF the entire machine.
400V
230V
HYS
LEVEL
6
60% - 1,2 Amps
***
***
DELAY
0,3 - 1,8 sec
***
To restart the unit it's necessary to push the
Reset Button.
Setting of the 6 Dip Switches, located behind the
small service panel, MUST be in ON position for
all of them.
On water cooled models correct head pressure
is 17 atm (240 PSI). Adjustments can be made
on the Water regulation Valve.
Air cooled models are equipped with two upper
and lower fan motors. Both pair of motors are
controlled by individual high pressure controls
that are connected to the systems high side. The
left fan control with not operate until high side
pressure reach 16.5 atm (230 PSI). The right fan
control will not operate until pressure reach
17 atm (240 PSI). This way, in colder ambients
only the upper fan motors operate. In higher
ambients the lower fans will cycle on/off. In extremely high ambients all four fan motors operate.
Suction pressure should be 1.7) atm (25 PSI)
with proper refrigerant charge. When charging
the system with refrigerant - on water cooled
models - set the compressor head pressure at
17 atm (240 PSI) and charge with refrigerant so
that the frost line extends out of the compressor
at least eight inches after 15 minutes operation
for best capacity and performance.
MF 86 REFRIGERANT CHARGE
The low-water pressure Switch functions to
discontinue the ice making process whenever
incoming water pressure is reduced to below
0.3 bar (4 PSI). The switch will automatically
restart the icemaking process when the water
pressure is increased to 1 bar (14 PSI).
MODEL
Air cooled
Water cooled
Remote air cooled
The manual Reset High head Pressure Control
is factory set to stop the entire icemaker should
the head pressure reach 34 bar (490 PSI). Cut
IN is set up at 25 bar.
CONTROL CONSOLE
Compressor delay timer
Delays the start up of the compressor by 15' at
every start up of the ice maker.
Gear motor delay timer
Delays gear motor STOP by 15' at every trip OFF
of the ice maker.
3 - phases monitoring relay
On the power in of the machine check and assure
correct Wiring - rotation of the gear motor.
R 404A
R 404A
R 404A
4300 gr.
2200 gr.
4700 gr.
Located on the front panel is a virtual control
console that monitors unit performance automatically. Any interruption or significant reduction
in water or electrical supplies causes an instant
stop to the operation of the modular flaker.
At the same time a warning light is activated on
the control console telling the user of the ice
makers stoppage and also the reason why.
If the stoppage is caused by its refrigerant
pressures or overloading in the drive train
mechanism a warning light glows, the cause of
the stoppage should be diagnosed and corrected
before reoperating the ice makers corrected
before reoperating the ice makers stoppage and
also the reason why.
Page 18
Page 18
The warning light signals low or interrupted water
supply. This light and its internal control are on an
automatic reset device whereby the icemaker
will automatically start up and the red light goes
off when water pressure reaches 1 bar (14 PSI)
or more.
Two other lights signal respectively Compressor
Motor Overload and Bin Thermostat cut-out
situation. Both these controls are automatic.
Besides the compressor that has important
function to provide refrigerant to the evaporator
to form ice, in the MF 86 flaker there are the
following components that worth to be mentioned:
TOO HI DISCH. PRESS.
TOO LOW SUCT. PRESS.
TOO LOW WATER PRESS.
The gear reducer is securely bolted on the chassis
base and supports the freezing cylinder as well.
On its input shaft there is fitted the driving pulley.
A separate output shaft with double keys is fitted
in the gear box bore and connected to the auger
shaft via aluminium casting coupling.
The Bin Thermostat Ranco K 22 - L 1075 - must
have its sensing capillary extended into ice room
in a way that it could be contacted by the ice when
storage ice room becomes filled. It terminates ice
production when its capillary gets in contact with
ice. It is wired in series with all other controls. It
is factory set to cut-out at 1,5°C and cut-in at 4°C.
The Condenser Water Cooled is tube within a
tube with end plate manifold to permit cleaning of
water tube. Its heat rejection is of 12.000 Kcal/hr.
The Condenser Water Valve PENN 1/2" Bellow
type - Regulated water flow through the condenser
to maintain constant head pressure at 17 atm
(240 PSI).
The Drier Filter is Castel 164S of cm3 250
capacity to dehydratate moisture in the system.
SPOUT SWITCH
BIN THERMOSTAT
The Expansion Valve is FLICA mod. AMVX 3 Press 3 bar - Office 4.5 mm for R 404 A - meters
the refrigerant to the evaporator serpentine at 1.7
bar (25 PSI).
3 PHASE
MONITORING RELAY
The Compressor Contactor Telemecanique
LC1D25 - with 4 N.O. and 1 N.C. contacts at
400V 25A with 230V coil.
DRIVE MTR
CURRENT RELAY
COMPR. PROTECTOR
The Drive Motor Bonfiglioli mod. BN80A4
0.55 Kw Volts 230/400 Ph 3 Hz 50 Amps
2.65-1.53 RPM 1410 thermally protected.
Provides power through speed reducer to turn
auger.
The Condenser Fan Motor on Air Cooled Mod.
only - 4 X unit - Elco mod. 3RGH 70/30/1
Watts 70 - amps 0,7 - Volts 220 - Ph 1 - Hz. 50 RPM 1300 - Thermally protected Capacitor
µf 3,15 - Volts 450 - Fan 300 m/mm3/h 1750.
The Gear Reducer
Bonfiglioli mod. VF/W49/110 Ratio 1/400. High
and lo speed gear box are oil lubricated. Oil Must
be changed at LOW SPEED SECTION every
25.000 hours. Use lt. 1.8 of Syntethic Oil only:
SHELL TIVELA OIL SC 320
Drive Motor Contactor Telemecanique
LC1K09 - with 4 N.O. contacts at 400V 9A with
230V 50-60 Hz coil.
The Evaporator: a vertical stainless steel tube,
refrigerated, and water filled. In it there is a
stainless steel auger and a water seal.
The Auger: a stainless steel triple spiral auger,
it pushes the ice ribbon up to the top of the
evaporator.
The Water Seal: a two part "face" seal, the top
half rotating with the auger, the bottom half
stationary, the sealing action being where the
two seal "faces" meet.
The Breaker: where the ice is compressed and
much of the extra water is squeezed out of it
before it reaches the ice spout.
The Thrust Bearing (Top bearing): as the ice is,
pushed up the evaporator, the auger is thrust
down, and pressure from the auger thrust is
taken up by this bearing.
Page 19
Page 19
SECTION IV
ADJUSTMENT AND REMOVAL AND REPLACEMENT PROCEDURES
The procedures provided in this Section are
arranged in alphabetical order, to make specific
Adjustment and Removal and replacement
information easy to locate.
Read the instructions throughly before performing
any Adjustment or Removal and Replacement
Procedures.
1.
ADJUSTMENT OF THE BIN
THERMOSTAT CONTROL
The control for the Bin Thermostat is the Temperature Control, located in the Control Box
Assembly.
WARNING - The adjusting screws on the
Temperature Control device have very
sensitive response to adjustment.
Over-adjusting or erratic guessing, can
foul the instrument and cause ultimate
delay and part replacement, WHICH
COULD HAVE BEEN PREVENTED.
RAISE or LOWER the Water Level by raising or
lowering the Water Reservoir and its Mounting
Brackets.
A. To RAISE the Water Level: loosen and
remove the two screws which attach the Mounting
Bracket of the Water Reservoir to the frame and
raise the Water Reservoir Assembly of the desired
amount; then thread the screws in the
corresponding holes and tighten.
B. To LOWER the water Level: loosen and
remove the two screws which attach the Mounting
Bracket of the Water Reservoir to the frame and
lower the Water Reservoir Assembly of the
desired amount; then thread the screws in the
corresponding holes and tighten.
WARNING. - Be sure the electrical power
supply and the water supply are OFF,
before starting any of the following
REMOVAL
AND
REPLACEMENT
procedures, as a precaution to prevent
possible personal injury or damage to
equipment.
Factory settings is +1,5°C cut-out and +4°C cutin.
2.
ADJUSTMENT OF THE WATER
REGULATOR ASSEMBLY (WATER
COOLED ONLY)
The correct head pressure on MF 86 Flakers is
17 atm (240 PSI). Adjustments can be performed
on the Water Regulator Assembly to increase or
decrease the head pressure.
To Adjust the Water Regulator Assembly:
A. To INCREASE the Head Pressure: Rotate
the adjusting Screw, on the Water Regulator
Assembly IN or CLOCKWISE.
B. To DECREASE the Head Pressure: Rotate
the adjusting Screw, on the Water Regulator
Assembly OUT or COUNTERCLOCKWISE.
3.
ADJUSTMENT OF THE WATER LEVEL
INTO THE FREEZER CHAMBER
The correct Water Level in the Freezer Chamber
is about 2 cm (3/4 inch) below the ice discharge
opening. Low Water Level causes excessive
strain inside the Freezer Assembly due to a
faster freezing rate.
When the Water Level is above or below the
correct level adjustment can be performed to
4.
ADJUSTMENT OF THE AUTOMATIC
EXPANSION VALVE
This valve may be manually regulated by means
of the adjusting stem.
Turning the adjustment to the left counterclockwise, will increase the rate of refrigerant flow.
Turning the adjustment to the right (clockwise),
the refrigerant flow to the evaporator is reduced.
Use hex head wrench for manual adjusting
operations.
5.
ADJUSTMENT OF FAN MOTOR
PRESSURE CONTROL
CAUTION - To prevent electrical schock
or damage to equipment, when the cover
is removed ensure that power supply is
switched off.
Two reverse acting, automatic reset, high
pressure controls fitted inside the control box are
electrically connected to the condenser fan motors
and by a capillary tube to the liquid line. Their
function is to maintain the head pressure at 16.5
and 17 bar (240 -245 PSI) with a fixed differential
range of 1 bar (14 PSI).
Page 20
Page 20
To adjust the condensing pressure turn the
grooved adjusting stem by the special adjusting
key P/n 00102300 clockwise to dicrease or
Counter-clockwise to increase the setting point.
B. To replace the Condenser, reverse the
removal procedure.
7.
NOTE.
A. These are general steps to be followed
at first, when removing any part of any
refrigeration system, which are in summary.
a) Store the refrigerant charge in
compressor crankcase.
b) Remove all refrigerant from part to be
opened.
c) Balance pressures in parts just
evacuated.
d) Isolate parts to be opened from the rest
of the system.
e) Clean and dry joints to be broken.
f) All refrigerant openings should be
immediately plugged as soon as they are
opened.
g) Upon reassembling, it is necessary to
remove all the air moisture from the lines and
whatever part that has been open to.
6.
The liquid refrigerant must be removed from the
condenser and the pressure in the condenser
must be adjusted to atmospheric pressure.
To remove the condenser:
1. Remove screws and the front panel and the
left side and right side panels.
2. Bleed off or blow the refrigerant charge
through the service valve after closing compressor
service valves; isolate the condenser.
3. Unsolder the refrigerant inlet and outlet
lines from the condenser.
4. Close off water circuit, disconnect the water
inlet and outlet lines from the condenser and
drain as much water as possible from the
condenser.
5. Remove bolts, lockwashers and washers
which secure the condenser to the chassis
mounting base.
6.
NOTE. Always install a replacement Drier,
anytime the sealed Refrigeration System is
opened. Do not replace the Drier until all
other repairs or replacements have been
completed.
A.
To remove the Compressor Assembly:
1) Remote screw and Right, Front, Rear
and Left Panels.
2) Remove two screw and the Cover from
the Compressor Junction Box.
3) Disconnect the electrical leads at the
Compressor Junction Box that originate in the
Control Box.
4) Close both suction and discharge Service
Valves. Bleed off or blow the refrigerant in
compressor through the Service Valves.
WARNING - Removal of compressor
because of its weight could present a
problem. Carts, small Hydraulic Hoists,
etc. must be made available to move the
compressor.
REMOVAL AND REPLACEMENT OF THE
WATER COOLED CONDENSER
NOTE. Always install a replacement Drier,
anytime the Sealed Refrigeration System is
opened. Do not replace the Drier until all
other repairs or replacements have been
completed.
Remove the condenser from the cabinet.
NOTE. Thoroughly evacuate the System to
remove moisture and non - condensables.
REMOVAL AND REPLACEMENT OF THE
COMPRESSOR ASSEMBLY
5) Unbolt the suction service and discharge
service valves from the compressor (DO NOT
REMOVE THE LINES FROM THE VALVES).
6) Immediately plug all the openings through
which refrigerant flows using dry rubber, cork
stoppers or tape.
7) Disconnect the compressor base bolts
that hold the compressor to the base.
8) Plug compressor refrigerant opening to
prevent oil from spilling out during compressor
removal, if this one is tilted.
9) Slide the compressor out from unit chassis
from the rear side.
B) To replace the compressor assy reverse
the removal procedures.
8.
REMOVAL AND REPLACEMENT OF
THE DRIER
A. To remove the Drier:
1) Remove screws and all service panels.
2) Remove screws and Drier brace attaching
the drier to the Chassis.
3) Bleed off or blow the refrigerant charge
through the service valve.
4) Unloose the refrigeration lines flare nuts
at each end of Drier, remove the Drier and
separate drier from the drier brace.
Page 21
A. To replace the Drier:
CAUTION
1. If the factory seal is broken on the
replacement drier, exposition of it to the
athmosphere, more than a few minutes,
the Drier will absorb moisture from the
atmosphere and loose substantial ability
for moisture removal.
2. Be sure the replacement Drier is
installed with the arrow positioned in the
direction of the refrigerant flow.
1) Remove the factory seals from the
replacement drier and install the drier in the
refrigerant lines with the arrow positioned in the
direction of the refrigerant flow.
Page 21
4. Disconnect the water inlet line at the rear
of the Water Regulator.
5. Disconnect the Condenser water inlet
tube at the front of the Water Regulator.
6. Remove two screws, lockwashers and
washers which attach the Water Regulator
Assembly bracket to the Chassis base and
remove the Water Regulator Assembly and
bracket.
NOTE. - Thoroughly evacuate the System to
remove moisture and non - condensables.
B. To replace the Water Regulator Assembly
reverse the removal procedure.
2) Install the drier brace on the drier.
3) Tighten the flare nuts to both drier fittings
to connect the refrigerant lines.
4) Purge the system and check for leaks.
5)Throughly evacuate the system to remove
moisture and non-condensables.
6) Charge the system with refrigerant, by
weight. SEE NAMEPLATE.
7) Re-mount all Service Panels.
11. REMOVAL AND REPLACEMENT OF THE
AUGER, WATER SEAL, BEARINGS AND
COUPLING
A. To Remove the Auger, Water Seal,
Bearings, and Coupling:
1. Remove screws and the Front Panel and
the Top Panel. Shut close water supply. Drain
the water reservoir and freezer assy using the
drain tube attached to the freezer water inlet.
2. Remove the screws that secure the spout
to the stop of the Freezer Assembly.
9.
REMOVAL OF EXPANSION VALVE
A. To remove the expansion valve:
1. Remove screws and service panels.
2. Close service valves on liquid line.
3. Run the compressor for a moment until
the evaporator coil has no liquid refrigerant in it.
4. With the compressor idling, equilize the
pressure by cracking the liquid line service valve.
5. Turn the suction service valve stem all
the way in.
6. Dry and clean the expansion valve
accurately.
7. Remove the liquid line and unbolt the
valve.
8. Seal refrigerant openings immediately.
B. To replace the expansion valve reverse
the removal procedures.
10. REMOVAL AND REPLACEMENT OF
THE WATER REGULATOR ASSEMBLY WATER - COOLED MODELS
A. To remove the Water Regulator
Assembly:
1. Remove screws and the Service Panels.
2. Bleed off or blow the refrigerant charge
through the Schrader valve.
3. Unsolder the Capillary line from the Water
Regulator Assembly, where connected at the
process header.
3. Disconnect wires from micro box spout
switch.
4. Remove micro-box and the spout assy.
5. Remove center plastic cap that protects
top bearing.
6. Unloose and remove center bolt that
secures the ice breaker to the auger.
7. Unloose and remove 8 screws that hold
the ice breaker to freezer barrel.
(Two longer screws are used with freezer side
bracket).
8. Insert two of these screws into two
threaded-blind holes, which must have no bottom
on barrel and by evenly drawing them down, ice
breaker is lifted up.
9. Grasp the ice breaker and lift it up entirely.
Worm shaft witt remain into the freezer worm
tube.
10. With a rowhide mallet or a piece of wood
placed on the bottom end of the top bearing, tap
the bottom of the bearing to break it loose to be
pulled out from ice breaker.
11. Clean away old grease and replace the
"O" rings in the ice breaker.
12. Insert in auger hub threaded hole an
eyebolt of 16 m/m in order to offer sufficient and
positive hook for pulling-out the auger.
13. Lift and pull-out the auger with the help,
eventually of a small hydraulic Hoist.
Page 22
NOTE:
1. Any time the Auger is removed for
replacement, or, for the inspection and
replacement of the Bearing or Coupling, use
extra care in handling the Water Seal parts,
so no dirt or foreign matter are deposited on
the surfaces of the Seal.
2. If there is any doubt about the
effectiveness of the Water Seal or O-Ring,
REPLACE THEM. A dirty, worn or faulty
Water Seal or O-Ring will cause a leak and
ultimately require a second, time consuming,
removal and replacement procedure to be
performed, that COULD HAVE BEEN
PREVENTED.
3. Lower bearing or water seal should be
removed by pulling-out the bearing retainer
from the bottom of freezer barrel.
You can heat the bearing retainer with a soft
flame.
The bearing will drop out by itself.
14. Remove screws and lockwashers which
attach the Freezer Assembly to the Adaptor on
the Gear box.
15. Raise the Freezer Assembly off of the
Adaptor, to gain access to the Bearing Retainer;
then, temporarily secure the Freezer Assembly
out of the way to allow room to work.
16. Unloose and remove the four screws
that secure the bottom flange to the worm tube.
Page 22
NOTE:
1. When installing the Bearing, in the
bearing retainer carefully tap a piece of wood
positioned across the bearing, to evenly seat
the Bearing in the retainer.
2. After assembling the ice breaker on
the upper end of the Auger and BEFORE
installing the Cap apply an ample coating of
vary bond grease type Never Seez food
grade H1 - certified -20°C +150°C Grease, P/
N 263612 00, to the upper part of the Bearing,
the Cap Screw and Washer.
Then, install the Cap in place.
12. REMOVAL AND REPLACEMENT OF
THE FREEZER ASSEMBLY
NOTE:
1. The Cabinet may have to be removed
from is permanents location, especially if
located in a corner, in order to have access to
the left side and rear of the Chassis.
2. In addition to shutting OFF electrical
power and inlet water to the icemaker, be
sure to disconnect the inlet water line
BEFORE moving the icemaker from the
permanent location.
3. Always install a replacement Drier,
anytime the sealed refrigeration system is
opened. Do not replace the Drier until all
other repair or replacement has been
completed.
A. To Remove the Freezer Assembly:
1. Remove screws and left and right side
rear panels.
17. Push out to remove the seal ring.
2. Refer to procedure IV-12 and remove the
Spout Assembly, Ice Breaker and Auger.
18. Remove the clip ring and the bearing
from the bearing retainer.
3. Remove Corbin clamp and Tygon tube
from the Freezer Assembly that connects to the
Water Reservoir Assembly.
19. Inspect the lower half of the Water Seal.
If reusable, use care to protect it from dirt, etc.
prior to replacement procedure.
4. Perform operation at steps 2-3-4-5 at
procedure IV-10.
20. Inspect the lower Bearing and, if the
Bearing is dry replace it with a new one.
5. Disconnect suction line joint from the
freezer.
6. Unsolder the refrigerant inlet line at the
freezer.
21. Inspect the O ring of lower bearing
retainer - eventually replace it with a new one.
7. Remove screws that secure bracket of
freezer to the left side of chassis.
22. Reach through the Adaptor and remove
the Coupling for inspection.
8. Remove screws, lock washers and
washers which attach the bottom of the Freezer
Assembly to the Adaptor on the Gear box.
23. Check the Coupling for cracks, chipping
and excessive wear.
9. Lift the Freezer Assembly up and off of
the Adaptor of Gear box.
NOTE: Throughly evacuate the System to
remove moisture and non - condensables.
B. To replace, the Auger, Water Seal,
Bearings, and Coupling, reverse the removal
procedure.
B. To replace the Freezer Assembly, reverse
the removal procedure.
Page 23
13. REMOVAL AND REPLACEMENT OF THE
WATER RESERVOIR ASSEMBLY
A. To remove the Water Reservoir
Assembly:
1. Remove screws and the left Panel and
the Top Panel. Close the Water Supply.
Drain water reservoir and freezer assy.
Using the drain tube attached to the freezer
water inlet.
NOTE: Be prepared with container or rags,
to catch water left in lines, when lines are
disconnected in next steps, to prevent
draining water on parts, components,
electrical lines, etc.
2. Disconnect the water inlet tube from the
Water Reservoir Assembly.
3. Remove two corbin clamps and two
tubes from the bottom of the water reservoir assy
and damp all water in them by bending them
down in a pail.
4. Unscrew and remove the screws that
secure the water reservoir bracket.
5. Remove the Water Reservoir Assembly,
from the mounting bracket.
B. To replace the Water Reservoir
Assembly, reverse the removal procedure.
NOTE: Check that the installed replacement
Water Reservoir Assembly float moves freely.
Page 23
2. Disconnect wire leads to motor.
3. Remove four hex head bolts, lockwashers
and washer which attach the motor to the gear
reducer.
4. Remove the drive motor out of the gear
reducer.
B. To replace the drive Motor reverse the
removal procedure.
15. REMOVAL AND REPLACEMENT OF
GEAR BOX
A. Remove screws and all service panels.
1. Remove four nuts and washers which
hold the gear box adaptor to the evaporator
assembly.
2. Unloose and remove screws securing
upper evaporator bracket to left side chassis.
3. With a small hydraulic Hoist raise the
evaporator assembly to facilitate removal of entire
gear box.
4. Unloose and remove four nuts holding
the gear box to unit base. The gear box is now
loose and can be removed. Do not tilt to avoid oil
spillage.
NOTE: Gear box is supplied with the drive
motor already in place.
14
REMOVAL AND REPLACEMENT OF THE
DRIVE MOTOR
A. To remove the drive motor assembly:
1. Remove screws and front, and left side
panels.
B. To remount Gear Box assembly reverse
the removal procedure taking care to position
correctly the output shaft with its keys well in
shape.
Page 24
Page 24
SECTION V
SERVICE DIAGNOSIS
The Service Diagnosis Sections is for use in
aiding the servicemen in diagnosing a particular
problem for pin-point the area in which the
problems lies, thus an ever available reference
for proper corrective action.
1.
The following chart lists corrective actions for
the causes of known symptoms of certain
problems that can occur in the ice
makingrefrigeration system.
ICE MAKING - REFRIGERATION SYSTEM
SYMPTON
POSSIBLE CAUSE
SUGGESTED CORRECTION
2nd Warning Light glows
Lo-refrigerant press.
Incorrect refrigerant
suction pressure
Add Refrigerant to raise suction
pressure.
Raise head press. control setting.
Moisture in system.
Overcharge of oil in system.
Purge - change drier.
Dehidratate & recharge the system.
Not enough refrigerant.
Check for refrigerant leak and
re-charge correctly.
No water in float reservoir.
Check for water inlet through
float ball or for water waste.
3rd Warning Light glows
Lo-water pressure.
Intermittent water supply
or too low water pressure.
Water shut-off valve closed.
Check and clean water strainer
The unit does not make ice.
Drive coupling worn or splitted.
Unloose and pull-ont gear box
and change coupling.
Gear in gear box stripped.
Check and replace.
Water not entering
freezer assy.
Check water line from reservoir
to freezer.
Hi-pressure control cut-off
unit operation.
Check cooling water at condenser.
Condenser tube clogged-up.
Water regulating valve to be
re-adjusted.
1st Red Light glows
Hi-pressure excessive.
Fan motor out of operations.
Dirty condenser.
Green Light is off. Unit
will not run
4th Warning light glows
5th Warning light glows
6th Warning light glows
Loose electrical connection
Check wiring.
Inoperative master switch.
Replace switch
Ice inside the plastic spout
Remove it and check reason why
Inoperative Spout Switch
Replace it
Ice in contact with the bin
thermostat bulb
Remove it and check reason why
Bin thermostat out of order
Replace it
Machine located in a very cold
room temperature
Move it to a warmer place (min.
room temp. +10°C)
Wrong connection of the three
phase to the unit plug
Reverse two of them
Short of one of the three phases
Check for proper power supply
Page 25
Page 25
SYMPTON
POSSIBLE CAUSE
SUGGESTED CORRECTION
7th Warning light glows.
Cut OFF at Drive
Motor Current Relay
Auger rubbing in freezer barrell Freezer barrell scored.
Remove auger to check situation
smooth freezer barrel and auger spiral
with send paper or replace them.
Auger bearing seized.
Gear box seized - No lubricant.
Freeze up.
Replace bearing.
Add lubricant or replace gear box.
Melt ice in freezer and remove ice
breaker and auger to check cause
of freezer-up.
Drive motor running on reverse.
Interchange connection wires.
Gear reducer loose on frame.
Tighten.
Drive motor end-play or
worn bearings.
Repair or replace.
Motor compressor not
floating on rubber cushions.
Loosen hold-down bolts.
Water level in evaporator
too low.
Set water level correctly
Damaged water seal.
Replace seal.
Gravity feed line leaking.
Check hose clamp.
Water level in reservoir too high.
Adjust water level.
Low voltage.
Check for overloading.
Dirty Condenser.
Clean condenser.
Water regulating valve too close.
Open water valve.
AEV valve closed.
Adjust.
Non-condensable gases
in system.
Purge-off.
Surrounging air temperature
above 40°C (100°F).
Correct or move unit to cooled
location.
Under-or over-charge of
refrigerant.
Re-charge with proper
amount.
Closed AEV.
Adjust valve for correc
refrigerant flow.
Faulty compressor valve plate.
Repair or replace.
Float ball full of water.
Replace.
Loss of refrigerant, under
or overcharge of refrigerant.
Check and recharge with
proper amount of refrigerant.
Plugged condenser water tubes.
Clean condensor.
Low water level in the reservoir.
Check float valve operation.
Overcharge of oil in system.
Check at oil sight glass.
Lower to 1/2 sight glass.
Low on lubricant.
Remove filling plug and
add synthetic Oil.
Excessive noise.
Water leaks.
8th Warning light glows.
Making wet ice.
Low ice production.
Gear box noise.
Page 26
Page 26
SECTION VI
WIRING DIAGRAMS
This section is provided as an aid in understanding
the electrical circuit of the MF 86 Flaker.
The Wiring Diagrams in this Sections are:
Figure 6.1 - Wiring diagram - MF 86 AS
(400/50/3+N).
Figure 6.2 - Wiring Diagram MF 86 ASR-14
(400/50/3+N).
WARNING - When conducting a continuity check of the MF 86 Flaker:
1. Disconnect the main power source.
2. DO NOT use an incandescent lamp or
jumper wire, conduct all tests with a
voltohm-meter.
Page 27
Page 27
F.G. 6.1
WIRING DIAGRAM MF 86 AS
400 / 50 / 3 + N
LEGEND
EV
FAN MOTOR
F1
3-PHASE MONITORING RELAY
FC1
SPOUT SWITCH
FU1
FUSE
HL1
POWER ON
HL2
HI PRESSURE ALARM
HL3
LOW PRESSURE ALARM
HL4
WATER ALARM
HL5
SPOUT SWITCH LIGHT
HL6
BIN FULL
HL7
WRONG PHASE ALARM
HL8
CURRENT DRIVE-MOTOR ALARM
HL9
COMPRESSOR THERMAL
PROTECTOR ALARM
KA1
CURRENT DRIVE-MOTOR RELAY
KA2
ICE LEVEL CONTROL RELAY
KA3
DRIVE-MOTOR START RELAY
KM1
COMPRESSOR CONTACTOR
KM2
DRIVE-MOTOR CONTACTOR
KT1
COMPRESSOR TIMER DELAY
KT2
DRIVE-MOTOR TIMER DELAY
M1
COMPRESSOR
M2
DRIVE MOTOR
R1
CRANCKCASE HEATER
SA1
SWITCH
SB1
RESET PUSH BUTTON
SP1
FAN PRESSURE CONTROL
SP2
HI PRESSURE CONTROL SAFETY
SP3
WATER PRESSURE CONTROL
SP4
LOW PRESSURE CONTROL
ST1
THERMOSTAT
TM1
COMPRESSOR THERMAL
PROTECTOR
TM1
COMPRESSOR THERMAL RELAY
Page 28
Page 28
F.G. 6.2
WIRING DIAGRAM MF 86 ASR
400 / 50 / 3 + N
LEGEND
3-PHASE MONITORING RELAY
FC1
SPOUT SWITCH
FSC1
FAN SPEED CONTROL
HL1
POWER ON
HL2
HI PRESSURE ALARM
HL3
LOW PRESSURE ALARM
HL4
WATER ALARM
HL5
SPOUT SWITCH LIGHT
HL6
BIN FULL
HL7
WRONG PHASE ALARM
HL8
CURRENT DRIVE-MOTOR ALARM
HL9
COMPRESSOR THERMAL
PROTECTOR ALARM
KA1
CURRENT DRIVE-MOTOR RELAY
KA3
DRIVE-MOTOR START RELAY
KM1
COMPRESSOR CONTACTOR
KM2
DRIVE-MOTOR CONTACTOR
KT1
COMPRESSOR TIMER DELAY
KT2
DRIVE-MOTOR TIMER DELAY
M1
COMPRESSOR
M2
DRIVE MOTOR
R1
CRANCKCASE HEATER
SA1
SWITCH
SB1
RESET PUSH BUTTON
SP2
HI PRESSURE CONTROL SAFETY
SP3
WATER PRESSURE CONTROL
SP4
LOW PRESSURE CONTROL
ST1
THERMOSTAT
TM1
COMPRESSOR THERMAL RELAY
TM1
COMPRESSOR THERMAL
PROTECTOR
REMOTE UNIT
FAN MOTOR
F1
MAIN ELECTRIC BOX
EV
Page 29
Page 29
SECTION VII
MAINTENANCE & CLEANING INSTRUCTIONS
GENERAL
The periods and procedures for maintenance
and cleaning are given as guides and are not to
be construed as absolute or invariable. Cleaning
especially will vary, depending upon local water
conditions and the ice volume produced and,
each icemaker must be maintained individually,
in accordance with its own particular location
requirements.
ICEMAKER
THE FOLLOWING MAINTENANCE SHOULD
BE SCHEDULED AT LEAST TWO TIMES PER
YEAR ON THIS ICEMAKER. CALL YOUR
AUTHORIZED SCOTSMAN SERVICE
AGENCY.
1. Check and clean optional water line strainers
or water purification system.
2.
Remove screws and top and front panel.
3. Remove cover from water reservoir and
depress the float to ensure that a full stream of
water enters each reservoir.
10. Check setting and function of all the pressure
controls also make sure that their corresponding
light will glow.
11. Inspect the top bearing in the ice breaker,
wipe clean of old grease and apply a coating of
food grade grease, SCOTSMAN P/N 263612.00
or equivalent.
12. Clean the air-cooled condensers, using a
vacuum cleaner, ahisk broom or brush.
The icemaking performance and capacity is
affected by the clean condition of the air-cooled
condenser. Instruct customer to clean frequently
and to be sure icemaker and fan motor are OFF.
13. Check that fan blades move freely, are not
touching any surfaces and are not bent or out of
balance.
14. Check for refrigerant leaks.
15. Check for water leaks. Pour water down
drain line to be sure that drain line is open and
clear.
4. Check that the icemaker cabinet is level, in
side-to-side and front-to-rear directions.
16. Check the quality of ice. Ice should be
slightly wet when formed, but will cure rapidly to
normal hardness in the bin.
5. Check that the water level in water reservoir
is below the overflow and is level to correspond
20 m/m below the ice discharge opening.
17. Check the bin thermostat control bulb, hold
ice on the control bulb of each system to test
icemaker shut-off.
6. Clean water reservoir and interior of the
freezer assembly, using a solution of SCOTSMAN
Ice Machine Cleaner. Refer to CLEANINGIcemaker.
NOTE. Cleaning requirements vary
according to local water conditions and
individual user operation. Visual inspection
of the auger before and after cleaning will
indicate frequency and procedure to be
followed in local areas.
7. When doubtful about refrigerant charge,
install refrigerant gauges on Service valves and
check gauge for compressor head and check
gauge for compressor head pressure. See
Nameplate for refrigerant charge specifications.
NOTE. The bin thermostat is factory se at
4°C differential and should keep the entire
icemaker system shut off at least 10 minutes
in high ambient temperatures, longer in low
ambients temperature during normal
operation. Settings are 1,5°C CUT-OUT and
4°C CUT-IN.
18. Make sure that water lines in water cooled
condenser are free from any excess of water
minerals, otherwise arrange to clean the tube
with a power driven wire brush or running through
it a weak acid solution made with 20 percent of
Hydrocloridic acid.
8. Check gauge for suction line pressure: will
be 1.7 Bar (24 PSI).
19. Check compressor oil level through sight
glass. Stop unit operation and after 10" see that
oil level is 2/3 m/m above center line of sight
glass.
9. Check drive motor operation:
Normal operating temperatures about 70° which
is hot to touch. Check with Ammeter amps drawn
and make sure they are in the limits of Drive
motor windings.
20. Check gear box oil level through its sight
glass every 6 months. Oil, on low speed section,
must be replaced every 25.000 hrs. Use
Syntetic Oil Shell Tivela SC320.
Page 30
Page 30
CLEANING
1. Remove screws and the top, left and front
panel.
2. Move master ON-OFF switch to OFF
position.
3. Remove reservoir cover and block the float
in water reservoir.
4. Drain the water reservoir and freezer
assembly using the drain tube attached to the
freezer water inlet. Return the drain tube to its
normal upright position and replace the end cap.
WARNING - SCOTSMAN Ice Machine
Cleaner contains Phosphoric and
Hydroxyacetic acids. These compounds
are corrosive and may cause burns. If
swallowed, DO NOT induce vomiting. Give
large amounts of water or milk. Call
Physician immediately. In case of external
contact flush with water. KEEP OUT OF
THE REACH OF CHILDREN.
5. Prepare cleaning solution: Mix 1 liter of
SCOTSMAN Ice Machine Cleaner with 10 liters
warm water.
6. Slowly pour the cleaning solution into water
reservoir until it is full.
7. Move master ON-OFF switch to ON position
and after 15 minutes compressor start up delay
as the ice maker begins to use water from the
reservoir continue to add more cleaning solution
to maintain full reservoir, if any has remained.
8. Continue icemaking, clearing ice from the
spout, until the water reservoir is empty. DO NOT
allow the icemaker to operate with empty
reservoir.
9.
Move master ON-OFF switch to OFF.
10. Flush-out the remaining cleaning solution
from freezer, as per step 4 Wash and rinse the
water reservoir.
11. Remove the block from the float in the water
reservoir and allow new fresh water to fill up the
freezer. Move the master ON-OFF switch to ON
position.
12. Continue icemaking for at least 15 minutes,
to eliminate any remanent of the cleaning solution.
Check ice for acid taste - continue icemaking
until ice tastes sweet.
CAUTION - DO NOT use ice produced
from the cleaning solution. Be sure none
remains in the bin.
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