Scotsman FM2400RL User Manual

TO THE OWNER OR USER:

Double System RL

The service manual you are reading is intended to provide you, and th e m ai n tenance or s ervice techni ci a n, with the i nf or m a ti o n ne eded to ins tall, start up, clean, maintain and service this ice system.

The is the freezer portion of a commercial ice machine. It is designed to be connected to the conden s i ng s ection of a r ef r i ge r ation sys t em , specifically a supermarket 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 . . . . . . . . . . . . . . . . . . . . . . . . . . Page 6

INITIAL START UP . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Page 7

COMPONENT IDENTIFICATION . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Page 8

COMPONENT DESCRIPTION: Control Box . . . . . . . . . . . . . . . . . . . . . . . . Page 9

COMPONENT DESCRIPTION: Evaporator . . . . . . . . . . . . . . . . . . . . . . . . . Page 10

ELECTRICAL SEQUENCE . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Page 11

OPERATION . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Page 12

OPERATION: Refrigeration . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Page 13

MAINTENANCE AND CLEANING . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Page 14

MAINTENANCE . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Page 15

CLEANING . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Page 16

SERVICE DIAGNOSIS: Condition - No Ice Being Produced . . . . . . . . . . . . . . . . Page 17

REMOVAL AND REPLAC EMENT . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Page 18

REMOVAL AND REPLAC EMENT: Bearing And Break er . . . . . . . . . . . . . . . . . . Page 19

REMOVAL AND REPLAC EMENT . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Page 20

REMOVAL AND REPLAC EMENT . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Page 21

REMOVAL AND REPLAC EMENT: Evaporator . . . . . . . . . . . . . . . . . . . . . . . Page 22

REMOVAL AND REPLAC EMENT: 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.

March 1997

Page 1

Double System RL

FOR THE INSTALLER: Spe cifications

BACK VIEW

20.84"

9.43"

5.25" 3"

15.53"

17.8"

18.8"

21.66"

The machine is des igned to fit the Scot sman storage bins BH800 or B90. Leg kit KLP4 is recommended when using both the B90 bin and an exte nsion.

Installation Limitations:

The machine is designed for indoor installations only. The machine must als o be i n a co ntrolle d en v i r on m en t w he r e the air temperatur e does not fall below 50 go above 100

The wate r tem p er a tu r e m ust be betw ee n 40 and 100

F., or

The electrical power supp ly must not dr op below

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

3.1"

SUCTION LINE CONNECTION

LIQUID LINE CONNECTION

POTABLE WATER INLET 3/8" FLARE

DRAIN 3/4" FPT

⁄

ELECTRICAL INLET

Scotsman Ice Systems are designed and manufactured w i th the highest regard for safety and performanc e . Th ey m ee t or exceed th e standards of U.L., N.S.F., and C.U.L.

Scotsman assumes no liability or responsibility of any kind for pr o du c t s ma nu fa c t ur e d by Sc otsman that ha ve been alt er ed in any way, including the use of any parts and/or other components no t specifically appr oved by Scotsman.

Scotsman reserves the right to make design chang es and/or i mprovements at any ti me. Specification s and designs are subject to chang e without notice.

SPECIFICATIONS:

Model Cabinet Size System

BTUH required Voltage Ice Type

Refrigerant FME2400RL 42"w x 27"h x 24"d R-404A 16,000 208-230 Flake NME1850RL same R-404A 16,000 208-230 Nugget FM2402RL same R-22 16,000 208-230 Flake NM1852RL same R-22 16,000 208-230 Nugget

March 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 R-404A refrigeration system, check to be sure that the system has eno ugh extra capacity to handle a minimu m of additional 16,000 BTU’s pe r hour @ 110 (assume a 0

Storage Bin:

Scotsman’s B90 will be the presumed bin of choice. If using the bin extension BX87, install heavy duty leg kit KLP4 and place the bin into position.

Remove the paper tape from the bin edge gasket, and install the bin extension onto the B90.

Remove the paper tape from the bin extension top edge, and using a mechanical lift, install the FME2400RH onto the top of the storage bin assembly.

Faste n th e i ce m achine to t he bi n usi n g ( 4) 5/15-18 2.5" cap screws.

Level the assembly by: a. Turni n g th e l eg le ve l er s i n or ou t on t he

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

the KLP4.

Locate t h e N ameplate:

locat ed on th e ba c k panel of th e mac h i ne , and contains the electrical characteristics particular to the unit being installed.

Refrigeration Installation:

The skills of a refrigeration technician are requi r ed to connect the ice mac hine to the buildings refrigeration system.

Notes:

•

Suctio n Line and Liquid Line Stubs are at the ba ck of the cabinet .

F. liquid line temperature

F. evaporator temperature).

The nam ep l ate is

Double System RL

TYPICAL INSTALLATION: ALLOW ROOM FOR SERVICE ACCESS

Ice Machine

BX87 BIN

EXTENSION

B90 STORAGE BIN

•

1.5 ounc es of t he app r op r i at e r ef r i ge r an t i s in the system as a holding charge.

•

Be sure there is enought BT U capacity.

•

Be sure 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.

March 1997

Page 3

Double 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 indivi dually 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 Nati on al , State, and local el e c tr ical codes. Usually the services of a licensed electrician will be required.

DETAIL OF

JUNCTION BOX

JUNCTION

BOX

POWER SUPP LY

March 1997

Page 4

FOR THE PLUMBER

CONFORM TO ALL APPLICABLE CODES

Double System RL

Water Supply:

The recommended water supply line is 3/8" O.D. copper tu bi n g, with a mi ni m u m operation press ur e of 20 PSIG, and a maximum of 80 PSIG. Connect to cold water using the male flare connection at the back of the ma ch i ne . In stall a shut of f v alve in an accessible spac e between the ice maker and the water supply.

SHUT OFF

VALVE

Drain System:

All drains are of the gr avity ty pe, 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 on ly rigid tub ing 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 FILTE R

March 1997

Page 5

Double System RL

FOR THE INSTALLER: Final Check List

1. Is the unit inst al led where th e ai r an d w at er temperatures are within and will remain within the limitations for the unit?

2. Is ther e 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 ins t r uc t ed on ho w to m ai n ta i n th e i c e maker?

13. Has the ow ne r bee n gi ve n the name an d telephone num ber of the local Scotsman servic e agency?

March 1997

Page 6

INITIAL START UP

Double System RL

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. Swit ch on the electrical power.

4. Open th e ha nd v al ve s ( in the liqui d l ine s ) .

5. Open th e ba l l val ves (in th e suction li ne s ) .

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

begins to m ak e i c e. Water fl ow s from th e water rese r vo i r , an d the float

drops, letting in more water.

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

begins to m ak e i c e. Water fl ow s from th e water rese r vo i r , an d the float

drops, letting in more water.

8. With both sides operating, the sight glass

should remain full, and the low side pressure will be about

2400 or 185 0 m od el s (R-404 A) 36 PSIG, + or - 2 2402 or 185 2 m od el s (R-22) 25 PSIG, + or - 2 Gearmotor amp draw should not exceed the

namepl ate rati ng .

9. Check the system very carefully for any

refrigerant leaks, repair as needed.

March 1997

Page 7

Double System RL

COMPONENT IDENTIFICATION

Liquid line valve(s)

These v alves operate to turn the ice making process on and off.

When the i c e level drops i n th e i ce ch ut e, the ice level sensor will cause the circuit board to close the liquid line relay, which energizes the liquid line valve for that side of the system. The liquid line valve opens, and liquid refrigerant flows to the thermos tatic expa nsion valve.

Thermostatic Expansion Valve

The metering device of each system, the valve(s) sense the tem peratu r e of t he s uction lin e an d v a r y the amoun t of liquid refr i g er a nt t ha t pa s se s 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 UN TIL THE EPR HAS BEEN SET.

The super h eat settin g i s 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 amount from the ou tlet temperature. The resul t is the supe r he at . U se an el ectronic thermom et er .

THERMO VALVE

F. Measure the

EPR VALVE

EPR: Evaporator Pressure Regulator Valve

This valve maintains a constant pre ss ure on its inlet (evaporators) side regardless of the pressure on the out l et (s uc t i on ) s i de . The EPR is fac tory set, adjust only if needed. After adjusting, re-check TXV superheat.

EPR Settings: R-22 models (2402/1852): 25 PSIG R-404 A m odels (2400/1850): 36 PSIG

Evaporators:

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 w he r e th e extra wat er i s com p r essed out of the ice. The ice then drops through the chute, into the storage bin.

THERM O

VALVE

LIQUID LIN E

VALVE

EVAPORATO R

March 1997

Page 8

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