Scotsman FM1202RL User Manual

TO THE OWNER OR USER:

Single System RL

The service manual you are reading is intended to
provide you, and the maintenance or service
technician, with the information needed to install,
start up, clean, maintain and service this ice
system.

This Remote Low side unit is the freezer portion of
a commercial ice machine. It is designed to be
connected to the condensing section of a
refrigeration system, specifically a supermarket
R-404A system.

Table of Contents

FOR THE INSTALLER: Specifications . . . . . . . . . . . . . . . . . . . . . . . . . . . Page 2

FOR THE INSTALLER . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Page 3

FOR THE ELECTRICIAN . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Page 4

FOR THE PLUMBER . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Page 5

FOR THE INSTALLER: Final Check List Initial Start Up . . . . . . . . . . . . . . . . . . Page 6

COMPONENT IDENTIFICATION . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Page 7

COMPONENT DESCRIPTION: Control Box . . . . . . . . . . . . . . . . . . . . . . . . Page 8

COMPONENT DESCRIPTION: Evaporator . . . . . . . . . . . . . . . . . . . . . . . . . Page 9

ELECTRICAL SEQUENCE . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Page 10

OPERATION . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Page 11

OPERATION: Refrigeration . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Page 12

MAINTENANCE AND CLEANING . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Page 13

MAINTENANCE . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Page 14

CLEANING . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Page 15

SERVICE DIAGNOSIS: Condition - No Ice Being Produced . . . . . . . . . . . . . . . . Page 16

REMOVAL AND REPLACEMENT . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Page 18

REMOVAL AND REPLACEMENT: Bearing And Breaker . . . . . . . . . . . . . . . . . . Page 19

REMOVAL AND REPLACEMENT . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Page 20

REMOVAL AND REPLACEMENT . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Page 21

REMOVAL AND REPLACEMENT: Evaporator . . . . . . . . . . . . . . . . . . . . . . . Page 22

REMOVAL AND REPLACEMENT: Gearmotor . . . . . . . . . . . . . . . . . . . . . . . Page 23

CIRCUIT BOARD TESTING . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Page 24

Parts lists and wiring diagrams are in the center of this manual, printed on yellow paper.

This manual was printed on recycled paper. Keep
it for future reference.

Note the Warning symbol where it appears. It
marks a potential hazard.

January 1997

Page 1

Single System RL

FOR THE INSTALLER: Specifications

The unit is designed to fit a variety of Scotsman
storage bins. See sales literature for more
information.

Installation Limitations: The remote low side is
designed for indoor installations only. The machine
must also be in a controlled environment where
the air temperature does not fall below 500F., or
go above 1000F.

The water temperature must be between 400F.
and 1000F.

The electrical power supply must not drop below

-5% of the lowest nameplate voltage or go above
10% of the highest nameplate voltage.

SPECIFICATIONS:

Scotsman Ice Systems are designed and
manufactured with the highest regard for safety
and performance. They meet or exceed the
standards of U.L., N.S.F., and C.U.L.

Scotsman assumes no liability or responsibility of
any kind for products manufactured by Scotsman
that have been altered in any way, including the
use of any parts and/or other components not
specifically approved by Scotsman.

Scotsman reserves the right to make design
changes and/or improvements at any time.
Specifications and designs are subject to change
without notice.

Model Cabinet Size System Refrigerant BTUH required Voltage Ice Type
FME1200RL 21"w x 27"h x 24"d R-404A 8,000 208-230 Flaker
NME950RL 21"w x 27"h x 24"d R-404A 8,000 208-230 Nugget
FM1202RL 21"w x 27"h x 24"d R-22 8,000 208-230 Flaker
NM952RL 21"w x 27"h x 24"d R-22 8,000 208-230 Nugget
FME1500RL 21"w x 27"h x 24"d R-404A 8,000 208-230 Flaker
NME1250RL 21"w x 27"h x 24"d R-404A 8,000 208-230 Nugget

January 1997

Page 2

FOR THE INSTALLER

Select the Location:

The unit can only be installed indoors
within the limitations described on
page 2.

The ice machine will have to be
connected to the building’s
refrigeration system, check to be
sure that the system has enough
extra capacity to handle a minimum
of additional 8,000 BTU’s per hour @
1100F. liquid line temperature
(assume a 00F. evaporator
temperature).

Storage Bin:

Using a mechanical lift, install the ice
machine onto the top of the storage
bin.

Fasten the ice machine to the bin
using (4) 5/15-18 2.5" cap screws.

Level the assembly by:
a. Turning the leg levelers in or out

on the standard legs.
b. Use shims under the heavy duty

legs of the KLP4.
Locate the Nameplate: The

nameplate is located on the back
panel of the machine, and contains
the electrical characteristics
particular to the unit being installed.

Refrigeration Installation:

The skills of a refrigeration technician
are required to connect the ice
machine to the buildings refrigeration
system.

Notes:

•Suction Line and Liquid Line

Stubs are at the back of the
cabinet.

Single System RL

TYPICAL INSTALLATION: ALLOW ROOM FOR SERVICE ACCESS

FME1200RL

BX87 BIN

EXTENSION

B90 STORAGE BIN

•1.5 ounces of the appropriate

refrigerant is in the system as a holding charge.

•Be sure there is enough BTU capacity.

•Be sure that the liquid connection is NOT in

series with another liquid line valve.

•Local Codes must be observed.

•A P-trap should be installed where there will be

more than 10’ of vertical rise in the suction line.

January 1997

Page 3

Single System RL

FOR THE ELECTRICIAN

CONFORM TO ALL APPLICABLE CODES

Electrical Connections:

Locate the nameplate for the current
requirements, and then determine the
wire size and type per the National
Electric Code. The machine requires a
solid chassis to earth ground wire.
Refer to the wiring diagram. The ice
machine should be connected to it’s
own electrical circuit, and be
individually fused.

Voltage, when the unit is under full
load, must remain within the limitations
listed on page 2.

LOW VOLTAGE CAN CAUSE
EQUIPMENT MALFUNCTION
AND/OR DAMAGE

All external wiring should conform to
the National, State, and local electrical
codes. Usually the services of a
licensed electrician will be required.

DETAIL OF

JUNCTION BOX

JUNCTION

BOX

POWER SUPPLY

January 1997

Page 4

FOR THE PLUMBER

CONFORM TO ALL APPLICABLE CODES

Single System RL

Water Supply:

The recommended water supply line is 3/8" O.D.
copper tubing, with a minimum operation pressure
of 20 PSIG, and a maximum of 80 PSIG. Connect
to cold water using the male flare connection at
the back of the machine. Install a shut off valve in
an accessible space between the ice maker and
the water supply.

SHUT OFF

VALVE

Drain System:

All drains are of the gravity type, and must have a
minimum of 1/4" fall per foot of horizontal run. The
drains must be installed to conform to local
plumbing codes. The use of a vent at the machine
and at the bin will allow the system to drain
properly. Use only rigid tubing for drains; insulation
of the bin drain is recommended.

3/8" MALE FLARE

3/4" FPT

VENT THIS DRAIN

WATER INLET

BIN DRAIN

FLOOR DRAIN

FIELD

SUPPLIED

WATER FILTER

January 1997

Page 5

Single System RL

FOR THE INSTALLER:

Final Check List

1. Is the unit installed where the air and water
temperatures are within and will remain within the
limitations for the unit?

2. Is there 6" clearance at the rear of the machine
for utility connections?

3. Has the water supply line be checked for
pressures between 20 and 80?

4. Has the unit been leveled?

5. Has the shipping material been removed from
inside the cabinet?

6. Have the electrical connections been made?

7. Have the drains been installed and checked for
leaks?

8. Has the refrigeration supply been installed and
checked for leaks?

9. Has the bin and cabinet been wiped clean or
sanitized?

10. Has the warranty registration card been
properly filled out and mailed to Scotsman?

11. Has the owner been given the service manual
and been instructed on how to maintain the ice
maker?

Initial Start Up

1. Remove the top and front panels.

2. Open the water valve, and observe that the two
float reservoirs fill up with water and shut off.

3. Switch on the electrical power.

4. Open the hand valve (in the liquid line).

5. Open the ball valve (in the suction line).

6. Switch on the master switch, and observe:
The liquid line valve opens
The gearmotor runs
Within a short time, that side of the machine

begins to make ice.
Water flows from the water reservoir, and the float

drops, letting in more water.

7. When operating, the sight glass should remain

full, and the low side pressure will be about:
RLE1202/952 - 25 PSIG + or - 2 PSIG
RLE1200/950 - 36 PSIG + or - 2 PSIG
RLE1500/1250 - 25 PSIG + or - 2 PSIG
Gearmotor amp draw should not exceed the

nameplate rating.

8. Check the system very carefully for any

refrigerant leaks, repair as needed.

13. Has the owner been given the name and
telephone number of the local Scotsman service
agency?

November 1999

Page 6

COMPONENT IDENTIFICATION

Single System RL

Liquid line valve

This valve operates to turn the ice making process
on and off.

When the ice level drops in the ice chute, the ice
level sensor will cause the circuit board to close
the liquid line relay, which energizes the liquid line
valve. The liquid line valve opens, and liquid
refrigerant flows to the thermostatic expansion
valve.

Thermostatic Expansion Valve

The metering device of the system, the valve
senses the temperature of the suction line and
varies the amount of liquid refrigerant that passes
through the valve into the evaporator, thus
maintaining a constant level of refrigeration. TXV’s
are factory set. Do not adjust unnecessarily.

DO NOT ADJUST THE TXV UNTIL THE EPR
HAS BEEN SET.

The superheat setting is 4-8
temperature of the evaporator outlet at the TXV
bulb, and check the low side pressure at the EPR
valve. Convert the pressure to temperature (using
a temperature pressure chart) and subtract the

0

F. Measure the

amount from the outlet temperature. The result is
the superheat. Use an electronic thermometer.

EPR: Evaporator Pressure Regulator Valve

This valve maintains a constant pressure on its
inlet (evaporator) side regardless of the pressure
on the outlet (suction) side. The EPR is factory
set, adjust only if needed. After adjusting, re-check
TXV superheat.

EPR Settings:
RLE1202/952: 25 PSIG + or - 2 PSIG
RLE1200/950: 36 PSIG + or - 2 PSIG
RLE1500/1250: 25 PSIG + or - 2 PSIG

Evaporator:

Where the water is frozen into ice crystals. As the
water cools, it begins to turn into ice, and the
slowly turning auger lifts the ice, as it is being
made, and forces it up and out of the “breaker” or
spout where the extra water is compressed out of
the ice. The ice then drops through the chute, into
the storage bin.

THERMO VALVE

LIQUID LINE

VALVE

EPR VALVE

November 1999

Page 7

Single System RL

COMPONENT DESCRIPTION: Control Box

Circuit Board: Controlling the ice machine
through sensors and relays. The sensors are: ice
level, and water level. The relays are for the gear
motor (with a built in time delay to clear the
evaporator of ice when the unit turns off) and for
the liquid line valve.

Transformer: Supplies low voltage to the circuit
board.

On/Off Switch: Manual control for that side of the
machine.

ON/OFF SWITCH

TRANSFORMER

CIRCUIT

BOARD

TERMINAL STRIP

January 1997

Page 8