Scotsman Ice Machine MAR1400 Installation Manual
MAR1400 & MAR2000
Introduction
This is the manual for the SCOTSMAN MAR
SPLIT UNITS models MAR1400 and MAR2000.
They are designed to operate only with fresh
water.
Table of Contents
Specifications ·········································· 2
MAR1400 ············································· 4
MAR2000 ············································· 5
General information ······································· 6
Complete System Installation ································· 7
Condensing Unit Component Control Devices ························ 8
Location Consideration ····································· 9
Installation Diagrams ······································ 10
Water Circuit ··········································· 11
Installation ············································ 12
Bin Thermostat ·········································· 13
Component Assembly ······································ 14
Electrical Connection ······································ 15
Multiple Installations ······································· 16
Testing ·············································· 17
Start-Up ············································· 18
Electrical Sequence: ······································· 19
Water and Refrigeration Schematics ······························ 20
MAR Split - Electrical / Refrigeration ······························ 22
Adjustments ··········································· 24
Adjustment & Removal & Replacement Procedures ····················· 25
Adjustment & Removal & Replacement Procedures ····················· 29
Maintenance & Cleaning Instructions ····························· 30
Cleaning Instruction ······································· 31
Service Diagnosis ········································ 32
Service Diagnosis ········································ 33
December 2000
Page 1
MAR1400 & MAR2000
Specifications
The standard machine includes a stainless steel
cabinet, a 230 volt, 60 Hz, single phase drive
motor, automatic expansion valve, heat
exchanger, float reservoir, time delay switch, bin
thermostat, water pump, ice spout switch, liquid
line solenoid valve, EPR valve and low water
pressure cut out.
The condensing unit, interconnecting refrigerant
tubes and electrical system must be supplied by
the purchaser as per the instructions given in this
service manual.
Take time now and read this manual which
contains valuable information on the MAR Split
System. For any further questions regarding the
care or operation of the machine, please contact
your local Scotsman distributor or call
1-800-533-6006.
Basic Specifications
MAR Unit, shown without chute
Model Basic Electrical Maximum Fuse Size Minimum Circuit Ampacity
MAR1400RL-32A 208-230/60/1 15 2
MAR2000RL-32A 208-230/60/1 15 2
34 1/2"
Ice Machine Area
24 1/2"
Front
Chute Area
20 "
December 2000
Page 2
Top view of unit and chute.
10 "
MAR1400 & MAR2000
ABC
MAR1400
OR
MAR2000
876 mm
(34.49”)
621 mm
(24.49”)
876 mm
(34.49”)
* Adapter shipped inside unit to go to 3/8” male
flare.
** Line sizes may need to be larger, depending
upon length of run.
December 2000
Page 3
Ø1Water
Inlet Fitting
¾” Hose
Coupling
Thread*
Ø2 Liquid
Line
3/8” ** 5/8” ** 21 mm
Ø3 Suction
Line
Ø4 Drain
MAR1400 & MAR2000
MAR1400
Set for Fresh water Operation
IMPORTANT OPERATING REQUIREMENTS:
WATER LEVEL IN DRUM RESERVOIR
115-120 mm (4.5 to 4.75 inches)
•
DRUM ROTATING SPEED
1.5 RPM (thick ice)
•
2.3 RPM (thin ice)
•
REFRIGERANT:
R-404A
•
REQUIRED CONDENSING CAPACITY
4800 Kcal/h at -24EC Evap. Temp. (19,000
•
BTUH at -11
WATER PRESSURE CONTROL SETTING
0.8 Bar (11 PSIG)
•
MAX. WATER TEMPERATURE
35 °C (95oF)
•
MIN. WATER TEMPERATURE
5°C(41oF)
•
MIN. WATER PRESSURE
1 atm. (15 PSI)
•
MAX. WATER PRESSURE
•
5 atm. (75 PSI)
MIN. AMBIENT TEMPERATURE
•
5°C(41oF)
MAX. AMBIENT TEMPERATURE
•
40 °C (104oF)
MAX. VOLTAGE VARIATION
•
± 10%
o
F)
Suggested Condensing Unit Settings:
HEAD PRESSURE SETTING
15 Bar (218 PSIG) on air cooled and water
•
cooled units
LOW PRESSURE SETTING
1.6 Bar (23 PSIG) on air cooled units
•
HI-PRESSURE CONTROL SETTING
36 Bar (522 PSIG)
•
LO-PRESSURE CONTROL SETTING
0.2 Bar (3 PSIG)
•
December 2000
Page 4
MAR2000
MAR1400 & MAR2000
Set for Fresh water Operation
IMPORTANT OPERATING REQUIREMENTS:
WATER LEVEL IN DRUM RESERVOIR
115-120 mm (4.5 to 4.75 inches)
•
DRUM ROTATING SPEED
2.4 RPM (thick ice)
•
REFRIGERANT:
R-404A
•
REQUIRED CONDENSING CAPACITY
6500 Kcal/h at –24oC Evap. Temp (26,000
•
BTUH at –11
WATER PRESSURE CONTROL SETTING
0.8 Bar (11 PSIG)
•
MAX. WATER TEMPERATURE
35 °C (95oF)
•
MIN. WATER TEMPERATURE
5°C(41oF)
•
MIN. WATER PRESSURE
1 atm. (15 PSI)
•
MAX. WATER PRESSURE
•
5 atm. (75 PSI)
MIN. AMBIENT TEMPERATURE
•
5°C(41oF)
MAX. AMBIENT TEMPERATURE
•
40 °C (104oF)
MAX. VOLTAGE VARIATION
•
± 10%
o
F. )
Suggested Condensing Unit Settings
HEAD PRESSURE SETTING
15 Bar (218 PSIG) on air cooled and water
•
cooled units
LOW PRESSURE SETTING
1.6 Bar (23 PSIG) on air cooled units
•
HI-PRESSURE CONTROL SETTING
36 Bar (522 PSIG)
•
LO-PRESSURE CONTROL SETTING
0.2 Bar (3 PSIG)
•
December 2000
Page 5
MAR1400 & MAR2000
General information
Each MAR1400 or MAR2000 is an “Evaporating
Unit Section”, complete with driving mechanism
and control devices, encased in a stainless steel
cabinet. They only require a condensing unit to
make a complete scale-ice maker system.
Because they must be remotely connected to a
properly sized Condensing Unit, it is very important
that the right type and size of all the components
be used to complete the refrigerant system. It is
also very important that highly skilled refrigeration
technicians be used to complete the system by
making the refrigerant, water supply, drain and
electrical connections.
APPLICATIONS
The MAR units produce scale ice. Scale ice is a
dryer and colder form of the familiar flake ice. The
MAR split unit is a remote low side system. A
remote low side allows more flexibility in
placement of the ice machine section.
Some specific applications include:
a) Fishing Vessels
b) Fish Markets and Fish Processing Plants
c) Supermarkets
d) Meat packaging plants
Basically they can go in any place where there is a
limited space situation or where the condensing
unit (compressor/condenser) must be located in a
room where noise and heat is not objectionable.
MAR Split can be set to produce “THICK ICE”
generally used in the fishing industry or the
MAR1400 can be set to produce “THIN ICE”
generally used in the meat processing industry.
Standard versions are set for “THICK ICE”
production (about 2 mm or 5/64” thickness) and for
fresh water operation.
December 2000
Page 6
Complete System Installation
MAR1400 & MAR2000
How it is made
The complete scale-ice making system can be
divided in three major groups, they are:
a) the condensing unit or rack system
b) the evaporator drum unit (MAR1400 or
MAR2000) complete with drive mechanism, drive
motor, refrigerant and water lines fittings,
refrigerants expansion valve and electric wire
junction box.
c) control panel and box with compressor ON/OFF
switch, relay, timer, warning lights, pressure
switches and electrical wire terminal block,
connected to and controlling the condensing unit.
CONDENSING UNIT COMPONENTS - For
Reference Only
The condensing unit is not part of the MAR1400 or
MAR2000. They must either be connected to an
existing rack system or a separate condensing
unit.
Dedicated Condensing Units: Suggested
Models
MAR1400: Use MAR1400-RHS-A/C (air cooled) or
MAR1400-RHS-W/C (water cooled)
MAR2000: Use MAR2000-RHS-A/C (air cooled) or
MAR2000-RHS-W/C (water cooled)
Condensing Unit Component Guidelines
The condenser is basically a heat exchanger
where the heat absorbed by the refrigerant during
the evaporating process is discharged to the
condensing medium, which could be air or water.
Water cooled condensers require the use of a
water regulating valve. When using a marine type
condenser a marine type water regulating valve is
required. The required capacity of the condenser
about 30,000 BTUH for the MAR1400 and 39,000
for the MAR2000.
Particular care must be deserved to the selection
of the water cooled condenser especially the
marine type for fishing vessels installation. They
must be marine type (cupro-nickel).
is
The selection of proper type and size of
compressor together with the proper type and size
of condenser, their components and controls, is
critical for proper system operation.
The available capacity of the system must equal at
least
•
4800 Kcal/h at -24EC Evap. Temp. (19,000
BTUH at -11
MAR1400
•
6500 Kcal/h at –24oC Evap. Temp (26,000
BTUH at –11
the MAR2000
Length of Tubing Run Suction Line Liquid Line
4 to 15 meters (11 to 50 feet) 18 mm ID (3/4” OD) 12 mm ID (1/2” OD)
Less than 3 meters (10 feet) 14 mm ID (5/8” OD) 14 mm ID (3/8” OD)
o
F) refrigerating capacity for the
o
F.) refrigerating capacity for
The Liquid receiver is a storage tank for liquid
refrigerant. It is a common component used in
refrigeration and should be large enough to hold all
the refrigerant in the system.
A suggested component for some installations an
oil separator. When the compressor operates
small amount of oil is pumped out along with the
hot compressed vapor and to prevent it from going
any further in the system, the oil separator traps it
to return, upon opening of its float valve, to the
crankcase of the compressor.
December 2000
Page 7
MAR1400 & MAR2000
Condensing Unit Component Control Devices
The scale-ice maker refrigeration system must
have certain safety devices and controls in order to
fully protect it, however an excess of automatic
controls and protections may complicate the
situation.
In order to help the installer to decide with which
controls to use, a description of typical controls
and their positive and negative points is listed
below.
High Pressure Control
Strongly recommended for a condensing unit. Set
to values shown on tech. spec.
Lo Pressure Control
Recommended for a condensing unit. Very
important because in case of refrigerant leaks at
the evaporator, it prevents the operation of the
machine when the evaporator is in a vacuum.
Operating the evaporator in a vacuum could draw
into the system water from the drum reservoir.
Vacuum could also cause air inflow through the
compressor crank-shaft seal.
However, it may trip-out at system start-up and if
the suction operating pressure is very close to the
cut out point, it may trip out then as well.
December 2000
Page 8
Location Consideration
MAR1400 & MAR2000
WARNING - MAR SCALE ICE MAKERS are not
designed for outdoor installations where air
temperature falls below 5EC (40EF) or may
exceed 40EC (100EF)
Operating a machine with an unacceptable
configuration will void the refrigeration system
warranty.
For installation on board of fishing vessels, the
location for the condensing unit is generally the
engine room, while the evaporator unit can be
permanently placed in some area of the
deck-house or, if it is not too cold (not below 5EC
o
or 40
F.), inside the fish and ice hold.
If the MAR unit will be mounted to a fabricated
stand, it must be adequately fastened to it.
The stand must also be sturdy so it does not cause
excessive vibration and must be able to be
securely fastened to the wall or to the floor.
Placement of the MAR unit must take into
consideration where the ice is discharged and
what type of container (ice storage bin or walk-in)
will be used.
REFRIGERANT LINES
The diameter of refrigerant lines going from
condensing unit to evaporator unit and back must
be of adequate size in relation to tubing length.
Insulate any lines that will be exposed to
temperatures that will be below freezing for
extended periods of time.
Follow straight line routing, when possible,
however pitch the suction line 2 cm per meter or
¾” per yard.
Do not restrict the liquid line. Bends and fittings
should be the minimum necessary as they can
increase the resistance to the fluid flow.
If using a semi-hermetic compressor, the use of
vibration absorbers near the condensing unit will
help to reduce condensing unit vibration traveling
into the lines.
Because the appearance of an installation is
important, the piping should be put-in as neatly as
possible.
For best sound absorption, it is best to put-in two
absorbers in each line, one vertically and one
horizontally.
For evacuation and charging operations two
service valves must be provided. One on the liquid
line and one on the suction line.
A drier and a sight glass should be installed in the
liquid line at the condensing unit.
The table below show the recommended sizes of
refrigerant lines:
Note: The tubing connections at the MAR unit are
3/8” liquid and 5/8” suction.
Length of Tubing Run Suction Line Liquid Line
4 to 15 meters (11 to 50 feet) 18 mm ID (3/4” OD) 12 mm ID (1/2” OD)
Less than 3 meters (10 feet) 14 mm ID (5/8” OD) 14 mm ID (3/8” OD)
December 2000
Page 9
MAR1400 & MAR2000
Installation Diagrams
December 2000
Page 10
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