Ice-O-Matic GEM0956A2, GEM0450A2 Service Manual
Installation and Service Manual
Part Numb
9081350-04
2/10
GEM-MFI Series
Ice-O-Matic
11100 East 45th Ave
Denver, Colorado 80239
er
Date
8
GEM-MFI SERIES Introduction
How To Use This Manual
Ice-O-Matic provides this manual as an aid to the end user and service technician in installation and
maintenance of the GEM-MFI Series ice machines. Do not attempt to perform installation, start-up or
maintenance unless you have read and fully understand this manual.
If, at any time, you encounter conditions that are not addressed in this manual, call, E-mail or write the
Ice-O-Matic Service Department:
Ice-O-Matic
11100 E. 45
Denver, Co. 80239
Attn: Technical Service Department
E-Mail: Tech.service@iceomatic.com
Telephone Numbers Any Service communication must include:
800-423-3367 All Departments Model Number
888-349-4423 Technical Assistance Only Serial number
303-371-3737 A detailed explanation of the problem
Keep this manual for future reference.
The GEM-MFI Series Service Parts Manual is available separately.
Ice-O-Matic icemakers and dispensers are not approved for outdoor installation.
WARNING
repairs are performed on the ice machine and related equipment.
CAUTION:
machine and related equipment
th
Ave.
: Always disconnect electrical power and shut off water supply whenever maintenance or
Always wear protective eyewear whenever maintenance or repairs are performed on the ice
Page i
GEM-MFI SERIES Table Of Contents
Table of Contents
Introduction .................................................................................................................................. Page i
Table Of Contents ........................................................................................................................ Page ii
Freight Claim Procedure .............................................................................................................. Page iii
Warranty ...................................................................................................................................... Page iv
For The Installer (Guidelines) ...................................................................................................... Page 1
For The Installer (Applications) .................................................................................................... Page 4
For The Installer (Location) .......................................................................................................... Page 6
Remote Condenser ...................................................................................................................... Page 7
For The Plumber .......................................................................................................................... Page 12
For The Electrician ....................................................................................................................... Page 14
For The Installer (Completed Remote Installation) ...................................................................... Page 16
For The Installer (Check List) ...................................................................................................... Page 17
Start Up ........................................................................................................................................ Page 19
Component Description ............................................................................................................... Page 20
Electrical Sequence ..................................................................................................................... Page 24
Operation: Water ......................................................................................................................... Page 25
Operation: Refrigeration (Remote) .............................................................................................. Page 26
Operation: Performance .............................................................................................................. Page 29
Sanitizing and Cleaning ............................................................................................................... Page 31
Remote Condenser Maintenance ................................................................................................ Page 32
Air Cooled Maintenance .............................................................................................................. Page 33
Bearing Maintenance ................................................................................................................... Page 34
Sensor Maintenance .................................................................................................................... Page 35
Auger Maintenance ...................................................................................................................... Page 36
Service Diagnosis ........................................................................................................................ Page 37
Control System Diagnostics ......................................................................................................... Page 39
Removal and Replacement: Water Reservoir and Bin Controls .................................................. Page 40
Removal and Replacement: Bearing and Breaker ...................................................................... Page 41
Removal and Replacement: Auger .............................................................................................. Page 42
Removal and Replacement: Water Seal ...................................................................................... Page 43
Removal and Replacement: Evaporator ...................................................................................... Page 44
Removal and Replacement: Gear Motor ..................................................................................... Page 45
Removal and Replacement: Fan Blade and Fan Motor ............................................................... Page 46
Refrigeration System Service ...................................................................................................... Page 48
Wiring Diagrams………………………………………………………………………………………… Page 50
Service History ............................................................................................................................. Page 62
Page ii
GEM-MFI SERIES Freight Claim Procedure
Important!
Inspect Promptly
This merchandise has been carefully inspected and packed in accordance with the carrier’s packing
specifications. Responsibility for safe delivery has been assumed by the carrier. If loss or damage occurs, you
as the consignee must file a claim with the carrier and hold the container for carrier’s inspection.
Visible Loss or Damage
Any external evidence of loss or damage must be fully described and noted on your freight bill or express
receipt and signed by the carrier’s agent. Claim should be filed on a form available from the carrier.
Concealed Loss or Damage
If loss or damage does not appear until merchandise has been unpacked, make a written request for
inspection by the carrier within 15 days of the delivery date. Then file a claim on a form from the carrier.
File Claim Without Delay Do Not Return Damaged Merchandise to Ice-O-Matic
Page iii
GEM-MFI SERIES Warranty
Ice-O-Matic
Domestic & International Limited Warranty
Mile High Equipment LLC (the “Company”) warrants Ice-O-Matic brand ice machines, ice dispensers, remote condensers, water filters, and ice storage
bins to the end customer against defects in material and factory workmanship for the following:
Cube ice machines,”GEM” model compressed ice machines
,” MFI” model flake ice machines and remote condensers. Thirty-six (36) months parts and labor
“EF” and “EMF” model flake ice machines - Twenty-four (24)
months parts and labor
CD model dispensers - Thirty-six (36) months parts and
labor
An additional twenty-four (24) month warranty on parts (excluding labor) will be extended to all cube ice machine evaporator plates and compressors,
“GEM” model compressed ice machine compressors, and “MFI” model flake ice machine compressors from the date of original installation. An additiona l
thirty-six (36) month warranty on parts (excluding labor) will be extended to all “EF” and “EMF” model flake ice machine compressors from the date of
original installation. The company will replace EXW (Incoterms 2000) the Company plant or, EXW (Incoterms 2000) the Company-authorized distributor,
without cost to the Customer, that part of any such machine that becomes defective. In the event that the Warranty Registration Card indicating the
installation date has not been returned to Ice-O-Matic, the warranty period will begin on the date of shipment from the Company. Irrespective of the
actual installation date, the product will be warranted for a maximum of seventy-two (72) months from date of shipment from the Company.
ICE-model cube ice machines which are registered in the Water Filter Extended Warranty Program will receive a total of eighty-four (84) months parts
and labor coverage on the evaporator plate from the date of original installation. Water filters must be installed at the time of installation and registered
with the Company at that time. Water filter cartridges must be changed every six (6) months and that change reported to the Company to maintain the
extended evaporator warranty.
No replacement will be made for any part or assembly which (I) has been subject to an alteration or accident; (II) was used in any way which, in the
Company’s opinion, adversely affects the machine’s performance; (III) is from a machine on which the serial number has been altered or removed; or,
(IV) uses any replacement part not authorized by the Company. This warranty does not apply to destruction or damage caused by unauthorized service,
using other than Ice-O-Matic authorized replacements, risks of transportation, damage resulting from adverse environmental or water conditions,
accidents, misuse, abuse, improper drainage, interruption in the electrical or water supply, charges related to the replacement of non-defective parts or
components, damage by fire, flood, or acts of God.
This warranty is valid only when installation, service, and preventive maintenance are performed by a Company-authorized distributor, a Companyauthorized service agency, or a Company Regional Manager. The Company reserves the right to refuse claims made for ice machines or bins used in
more than one location. This Limited Warranty does not cover ice bills, normal maintenance, after-install adjustments, and cleaning.
Limitation of Warranty
This warranty is valid only for products produced and shipped from the Company after January, 2007. A product produced or installed before
that date shall be covered by the Limited W arranty in effect at the date of its shipment. The liability of the Compa ny for breach of this
warranty shall, in any case, be limited to the cost of a new part to replace any part, which proves to be defe ctive. The Company makes no
representations or warranties of any character as to accessories or auxiliary equipment not manufactured by the Company. REPAIR OR
REPLACEMENT AS PROVIDED UNDER THIS WARRANTY IS THE EXCLUSIVE REMEDY OF THE CUSTOMER. MILE HIGH EQUIPMENT SHALL
NOT BE LIABLE FOR ANY INCIDENTAL OR CONSEQUENTIAL DAMAGES FOR BREACH OF ANY EXPRESS OR IMPLIED WARRANTY ON THIS
PRODUCT. EXCEPT TO THE EXTENT PROHIBITED BY APPLICABLE LAW, ANY IMPLIED WARRANTY OR MERCHANTABILITY OR FITNESS
FOR A PARTICULAR PURPOSE ON THIS PRODUCT IS LIMITED IN DURATION TO THE LENGTH OF THIS WARRANTY.
Filing a Claim
All claims for reimbursement must be received at the factory within 90 da ys from date of service
time period will be void. The model, the serial number and, if necessary, proof of installation, must be included in the claim. Claims for labor to
replace defective parts must be included with the part claim to receive consideration. Payment on claims for labor will be limited to the published labor
time allowance hours in effect at the time of repair. The Company may elect to require the return of components to validate a claim. Any defective part
returned must be shipped to the Company or the Company-authorized distributor, transportation charges pre-paid, and properly sealed and tagged. Th e
Company does not assume any responsibility for any expenses incurred in the field incidental to the repair of equipment covered by this warranty. The
decision of the Company with respect to repair or replacement of a part shall be final. No pe rson is authorized to give any oth er warranties or to assume
any other liability on the Company’s behalf unless done in writing by an officer of the Company.
GOVERNING LAW
This Limited Warranty shall be governed by the laws of the state of Delaware, U.S.A., excluding their conflicts of law principles. The United Nations
Convention on Contracts for the International Sale of Goods is hereby excluded in its entirety from application to this Limited Warranty.
Mile High Equipment LLC, 11100 East 45
Parts and Labor
Ice storage bins -Twenty-four (24) month parts and labor
IOD model dispensers - Twenty-four (24) months parts, Twelve (12) months
labor
Water filter systems - Twelve (12) months parts and labor (not including filter
cartridges)
to be eligible for credit. All claims outside this
th
Avenue, Denver, Colorado 80239 (303) 371-3737
January 2007
Page iv
GEM-MFI SERIES For the Installer
Installation Guidelines:
For proper operation of the Ice-O-Matic ice machine, the following installation guidelines must be followed.
Failure to do so may result in loss of production capacity, premature part failures, and may void all warranties.
Ambient Operating Temperatures: (Not including remote condenser)
Minimum Operating Temperature: 50°F (10°C)
Maximum Operating Temperature 100°F (38°C)
Note: Ice-O-Matic ice makers and dispensers are not approved for outdoor installation.
Incoming Water Supply
Minimum incoming water temperature: 40°F (4.5°C)
Maximum incoming water temperature: 100°F (38°C)
Minimum incoming water pressure: 20 psi (1.4 bar)
Maximum incoming water pressure: 80 psi (4.1 bar)
Note: If water pressure exceeds 80 psi a water pressure regulator must be installed.
Drains
All drain lines must be installed per local codes. Flexible tubing is not recommended. Route bin drain, vented
float overflow drain and water condenser drain individually to a floor drain. The use of condensate pumps for
draining water is not recommended by Ice-O-Matic. Cold water drains should be insulated to prevent
condensation from forming. Ice-O-Matic assumes no responsibility for improperly installed equipment.
Water Filtration
A water filter system should be installed with the ice machine.
Clearance Requirements: Self contained air cooled ice machines must have a minimum of 6 inches (15cm) of
clearance at the rear, top, and sides of the ice machine for proper air circulation.
Stacking
Ice-O-Matic GEM-MFI ice machines are not designed to be stacked.
Dispenser Application
The GEM ice machine is approved for specific dispenser applications, reference page 4.
The MFI Series is not approved
Electrical Specifications
Refer to the serial plate at the rear of the ice machine to make sure proper voltage and circuit breaker size
have been supplied. Make sure the machine is on a dedicated circuit. The GEM-MFI Series are not supplied
with an electrical power cord and will need to be installed and wired per local electrical codes.
Adjustments
Level the machine within 1/8 inch in all directions. Adjust the cabinet or bin legs as required.
Check the bin control for proper operation.
Check the water level in the reservoir for proper adjustment.
Check the water regulating valve adjustment if water cooled.
for dispenser applications.
Page 1
GEM-MFI SERIES For The Installer
Air and Water Cooled
Page 2
GEM-MFI SERIES For The Installer
Remote
Page 3
GEM-MFI SERIES For the Installer
(
Bin Application
The GEM Series are designed to fit the following Ice-O-Matic Bins
●B42, using Bin Top KBT 24 (Note: 21 inch wide cabinet ONLY)
●B25, B40 B55 using Bin Top KBT 19.
●B100-B120 using Bin Top KBT 23 (one unit) or KBT 22 (two units).
● B150, B170 Not designed for GEM-MFI Series.
Dispenser Application
The GEM Series can be placed on and used with certain ice and beverage dispensers. Kits are required
proper operation. The MFI Series is not approved
IOM Gem Accessory List
Dispenser GEM0450 GEM0650 GEM0956
ICE-O-Matic IOD150 KBT15022, KGEMDIV KBT15022, KGEMDIV KBT15022, KGEMDIV
ICE-O-Matic IOD200 or IOD250 KBT25022_KGEMDIV+KGEMBIOD KBT25022_KGEMDIV+KGEMBIOD KBT25022_KGEMDIV+KGEMBIOD,
Cornelius ED or DF150 KBT15022+R629088514* KBT15022+ R629088514* KBT15022+R629088514*
Cornelius ED or DF200 KBT25022+KGEM200 KBT25022+ KGEM200 KBT25022+ KGEM200
Cornelius ED or DF250 KBT25022+ KGEM250 KBT25022+ KGEM250 KBT25022+ KGEM250
Cornelius ED300 KGEM300+629087966* KGEM300+629087966* KGEM300+629087966*
Cornelius Flavor Fusion KDIL-N-CFF+62988681 Black* KDIL-N-CFF+62988681 Black* KDIL-N-CFF+62988681 Black*
Lancer (Must have N in the
part number) 30 Inch 4500
Model
* Cornelius Part Number
All the dispensers have automatic agitation to keep the ice from clumping. If agitation is too frequent, the Pearl Ice will be damaged and will become
difficult to dispense. The Ice-O-Matic and Cornelius dispensers need to be set to 2 seconds on every 3 hours and the Lancer needs to be set to 4
seconds on, 150 seconds off.
The Ice-O-Matic and most Cornelius dispensers also have a restrictor plate at the outlet of the hopper. When used, that plate should be adjusted to be 1.5
inch open to limit the speed of the Pearl Ice flows out during dispensing.
Ice Machine Specifications
Model
Number
GEM0450A 2 21x24x27 115/60/1 Air 16.00 20 22
GEM0450W2 21x24x27 115/60/1 Water 14.35 20 18
GEM0650A2 21x24x27 115/60/1 Air 21.00 30 24
GEM0650W2 21x24x27 115/60/1 Water 19.50 30 19
GEM0650R2 21x24x27 115/60/1 Remote 23.50 30 208
GEM0655A2 21x24x27 230/50/1 Air 10.10 15 24
GEM0655W2 21x24x27 230/50/1 Water 9.50 15 19
GEM0956A 2 21x24x27 208-230/60/1 Air 11.80 15 30
GEM0956W2 21x24x27 208-230/60/1 Water 11.20 15 22
GEM0956R2 21x24x27 208-230/60/1 Remote 15.30 20 208
GEM0955A 2 21x24x27 230/50/1 Air 13.40 20 30
GEM0955W2 21x24x27 230/50/1 Water 13.10 15 22
MFI0500A2 21x24x27 115/60/1 Air 16.00 20 22
MFI0500W2 21x24x27 115/60/1 Water 14.35 20 18
MFI0800A2 21x24x27 115/60/1 Air 21.00 30 24
MFI0800W2 21x24x27 115/60/1 Water 19.50 30 19
MFI0800R2 21x24x27 115/60/1 Remote 23.50 30 208
MFI0805A2 21x24x27 230/50/1 Air 10.10 15 24
MFI0805W2 21x24x27 230/50/1 Water 9.50 15 19
MFI1256A2 21x24x27 208-230/60/1 Air 11.80 15 30
MFI1256W2 21x24x27 208-230/60/1 Water 11.20 15 22
MFI1256R2 21x24x27 208-230/60/1 Remote 15.30 20 208
MFI1255A2 21x24x27 230/50/1 Air 13.40 20 30
MFI1255W2 21x24x27 230/50/1 Water 13.10 15 22
WxDxH
Inches)
Page 4
for dispenser applications.
KDIL-N-L and Lancer Part Number 823491
Basic Electrical Condenser
KDIL-N-L and Lancer Part Number
82-3491
Minimum Circuit
Ampacity
Maximum Fuse
Size
for
KDIL-N-L and Lancer Part Number
82-3491
Refrigerant Charge
oz. R404
GEM-MFI SERIES For the Installer
Location:
Ice-O-Matic ice machines are designed to be installed indoors in a controlled environment. Install the ice
machine in a location where it has enough space around it to be accessible for service. A minimum of 6 inches
must be allowed at the back for air circulation on air cooled models. Try to avoid hot, dirty and crowded
locations. Be sure that the location of the machine is within the environmental limitations.
Storage Bin:
Remove the bin packaging. Tip the storage bin on its back, using parts of the packaging to protect the exterior
finish. Remove the skid and install the legs into the threaded holes in the bottom of the bin. Turn the leg
levelers all the way in preparation for leveling later. Return the bin to the upright position.
Note: Do not push the bin into position, but lift it there. Pushing a bin, especially one with ice in it, can cause
damage to the bin legs and mounts.
Install the appropriate bin top according to the instructions provided with the bin top.
Ice machine:
The ice machine is heavy, so the use of a mechanical lift is recommended for lifting the machine high enough
to install on top of the bin. After the unit is placed on the bin, line it up so it is even with the back side. Secure
the ice machine to the bin with the hardware provided with the ice machine. Remove the front panel and
remove any shipping blocks or packaging material.
Proper functioning of the bin door requires the bin door, when it is opened, to be in a stable position. If the ice
machine is too far forward on the bin, the opened door may not be stable, resulting in an unexpected closing of
the bin door.
If the ice machine is to be mounted on a bin or dispenser other than an Ice-O-Matic, refer to the manufacturer’s
instructions for machine mounting. Ice-O-Matic will not be responsible for damage or injury that results from
unexpected closing of the bin door as a result of the ice machine being too far forward on the bin.
Water Limitations:
An ice machine is a food manufacturing plant: it takes a raw material, water and transforms it into a food
product, ice. The purity of the water is very important in obtaining pure ice and maximizing product life. This
section is not intended as a complete resource for water related questions, but it does offer these general
recommendations:
●Check with a water treatment specialist for a water test and recommendations regarding water filters and
treatment.
●In most cases, the water used to make ice should be filtered or treated, depending upon the water.
There is no one type of water filter that is effective in all situations. That is why a water test in important.
RO Water Limitations:
Water conductivity must be no less that 35 microSiemens/cm.
Notice:
Ice-O-Matic ice machines are designed and manufactured with the highest regard for safety and performance
and meet or exceed the standards of UL, NSF and CUL.
Ice-O-Matic assumes no liability or responsibility of any kind for products manufactured by Ice-O-Matic that
have been altered in any way, including the use of any part and/or other components not specifically approved
by Ice-O-Matic.
Ice-O-Matic reserves the right to make design changes and/or improvements at anytime. Specifications and
design are subject to change without notice.
Page 5
GEM-MFI SERIES For the Installer
A
A
llow 6 “Clearance for Air Circulation
llow 6 “Clearance for Air Circulation
A proper installation locates the
ice machine indoors, but in a
place where the heat and noise it
produces are not objectionable.
Air cooled machines discharge
hot air out the back
have a minimum of 6 inches of
clearance behind the ice
machine.
Space for maintenance access is
also important. If two units are
placed side by side on a bin, side
access becomes even more
important.
and must
Two Units on One Bin
Page 6
GEM-MFI SERIES Remote Condenser
ERC Dimensions (Inches) GRC1001 GRC1061
A 33.36 33.36
B 10.75 10.75
C 23.81 23.81
D 2.04 2.04
E 6.12 6.12
F 16.73 16.73
G 11.65 11.65
H 19.57 19.57
GEM-MFI Model Number GEM0650R GEM0956R-MFI1256R
Line Sets
RT325404 25 Foot Precharged Line Set
RT340404 40 Foot Precharged Line Set
RT345404 45 Foot Precharged Line Set
RT360404 60 Foot Precharged Line Set
Page 7
GEM-MFI SERIES Remote Condenser Location
Use the following for planning the placement of the remote condenser relative to the ice machine.
Location Limits: Remote condenser location must not exceed ANY of the following:
● Maximum rise from the ice machine to the remote condenser is 35 physical feet.
● Maximum drop from the ice machine to the remote condenser is 15 physical feet.
● Physical line set maximum length is 100 feet.
● Calculated
Calculation Formula
● Drop = dd x 6.6 (dd= distance in feet)
● Rise = rd x 1.7 (rd = distance in feet)
● Horizontal Run = hd x 1 (hd = distance in feet)
● Calculation: Drop(s) + Rise(s) + Horizontal Run = dd+rd+hd=Calculated Line Length
Configurations that do NOT meet these requirements must receive written authorization from
Ice-O-Matic. This includes multipass or rack system remote condensers.
Do NOT:
● Route a line set that rises, then falls, then rises.
● Route a line set that falls, then rises, then falls.
Calculation Example 1:
The remote condenser is to be located 5 feet below the ice machine and then 20 feet away horizontally.
(5 feet x 6.6=33 feet) + (20 feet) = 53 feet. This location would be acceptable.
Calculation Example 2:
The remote condenser is to be located 35 feet above the ice machine and then 100 feet away horizontally.
(35 feet x 1.7=59.5 feet) + (100 feet) = 159.5 feet. 159.5 feet is greater than the 150 maximum is NOT
acceptable.
line set length maximum is 150 feet.
Page 8
GEM-MFI SERIES For the Installer
Remote Condenser Location:
Limited to a 25 foot or a 40 foot length of precharged refrigerant tubing connecting the ice machine to the
remote condenser. The remote condenser must be above or level with the ice machine. Select the best
available location, protecting the remote condenser from extremes of dirt, dust and sun. Meet all applicable
building codes. Usually the services of a licensed electrician are required.
Roof Attachment:
1. Install and attach the remote condenser to the roof of the building, using the methods and practices of
construction that conform to the local building codes, including having a roofing contractor secure the
remote condenser to the roof.
2. Have an electrician connect the remote condenser fan motor to the ice machine, using the junction box at
the back of the ice machine.
Precharged Line Set Routing
CAUTION: Do not connect the precharged
tubing until all routing and forming of the
tubing is complete. See the coupling
instructions for connecting information.
1. Each set of preharged tubing refrigerant lines
consists of a 3/8 diameter liquid line and a 1/2
inch diameter discharge line. Both ends of
each line have quick connect couplings, one
end has a Schrader valve connection, that end
goes to the condenser.
Note: The openings in the building ceiling or
wall, listed in the next step, are the minimum
sizes recommended for passing the refrigerant
lines through.
2. Have the roofing contractor cut a minimum
hole for the refrigerant lines of 1.750 inch.
Check local codes, a separate hole may be
required for the electrical power to the
condenser.
CAUTION: DO NOT KINK OR CRIMP
REFRIGERANT TUBING WHEN
INSTALLING IT.
3. Route the refrigerant lines through the roof
opening. Follow straight line routing whenever
possible. Any excess tubing MUST remain
within the building.
4. Spiral the excess length of precharged tubing
inside the building. Use a horizontal spiral
(does not need to be as tight as illustrated) to
avoid any traps in the lines.
5. Have the roofing contractor seal the holes in
the roof per local codes.
CAUTION: The couplings on the sets of
precharged lines are self sealing when
installed properly. Carefully follow the
instructions:
Page 9
GEM-MFI SERIES For the Installer
Typical Installation
REMOTE CONDENSER
ICE MACHINE
Page 10
GEM-MFI SERIES For the Installer
Coupling Instructions:
Initial Connections:
1. Remove the protector caps and plugs. Wipe the seats and threaded surfaces with a clean cloth to be
certain that no foreign matter remains on them.
2. Lubricate the inside of the couplings, especially the O-Rings with refrigerant oil.
3. Position the fittings on the correct connections on the remote condenser
and ice machine.
●The 1/2 inch discharge line (Schrader valve end) goes to the remote
condenser fitting marked “Discharge Line”
●The 3/8 inch liquid line (Schrader valve end) goes to the remote
condenser fitting marked “Liquid Line”.
●The 1/2 inch discharge line goes to the ice machine fitting marked
“Discharge Line”.
●The 3/8 inch liquid line goes to the ice machine fitting marked “Liquid
Line”.
Final Connections:
4a. Begin by tightening the couplings together by hand. Continue to turn the swivel nuts by hand until it is
certain that the threads are properly engaged.
4b. Using two wrenches, one to rotate the swivel nut and one to hold the tubing, tighten each coupling.
It is CRITICAL that ONLY the NUT on the precharged tube be turned or
the diaphragms will be torn loose by the piercing knives and be loose in
the refrigeration system causing severe operational problems.
Note: As the coupling is tightened, the diaphragms in the quick connect
couplings will begin to be pierced. As that happens, there will be
increased resistance to tightening the swivel nut.
4c. Continue tightening the swivel until it bottoms out or a very definite
increase in resistance is felt (no threads should be showing). Do NOT
over tighten.
5. Using a marker or pen, mark a line lengthwise from the coupling union nut
to the bulkhead. Then tighten the coupling and additional 1/4 turn. As
the nut turns, the line will show when the 1/4 turn is made.
6. After all connections are made, and after the king valve has been opened,
check the couplings for leaks.
Page 11
GEM-MFI SERIES For the Plumber
Water Inlet:
●Air Cooled Models: The recommended water supply is clean, cold water. Use 3/8 inch O.D. copper tubing,
connect to the 3/8 FPT at the back of the cabinet. Install a hand valve near the machine to control the water
supply.
●Water Cooled Models: A separate 3/8 inch O.D. copper line is recommended, with a separate hand valve to
control it. Connect to the 3/8 inch FPT condenser inlet at the back of the cabinet. The water pressure to all
lines must always be above 20 psig, and below 80 psig.
●Water Treatment: In most areas, a water filter of some type will be useful. In areas where the water is
highly concentrated with minerals, the water should be tested by a water treatment specialist, and the
recommendations of the specialist regarding filtration and/or treatment should be followed.
Drains:
●Air Cooled Models: Connect a rigid drain tube to the ¾ FPT drain fitting at the back of the cabinet. The
●Water Cooled Models: Connect a separate drain line to the ½ inch condenser drain connection at the back
●Storage Bin: Connect a separate
WATER COOLED MODELS
drain is a gravity type, and a ¼ inch per foot fall is the minimum acceptable pitch for the drain. There should
be a vent at the highest point of the drain line, and the ideal drain receptacle would be a trapped and vented
floor drain. Use only ¾ inch rigid tubing.
of the cabinet. Do not vent this drain.
gravity type drain line to the ice storage bin drain. Vent this drain if there is
a long horizontal run from the bin to the floor drain. Insulation of this drain line is recommended.
AIR COOLED MODELS
Condenser Inlet
Water Filter
Hand Valve
Condenser Drain
Condenser Inlet
Water In
Condenser Drain
Vented Drain
Vented Drain
Water Filter
Vented Drain
Hand Valve
Water In
Vented Drain
Water Inlet
Bin Drain
Bin Drain
Floor Drain
Page 12
GEM-MFI SERIES For the Plumber
Water Inlet:
●Remote Cooled Models:
The recommended water supply is cold water. Use 3/8 inch O.D. copper tubing, connect to the 3/8 inch FPT
on the back of the cabinet. Install a hand valve near the machine to control the water supply.
Drains:
●Remote Cooled Models:
There is one 3/4 inch FPT drain at the back of the cabinet; the drain line is of the gravity type, and 1/4 inch per
foot fall is an acceptable pitch for the drain tubing. There should be a vent at the highest point of the drain line,
and the ideal drain receptacle would be a trapped and vented floor drain. Use only ¾ inch rigid tubing.
Storage Bin:
Install a separate gravity type drain. Insulation of this drain line is recommended.
3/8 FPT
Page 13
GEM-MFI SERIES For the Electrician
Electrical Connections:
Check the ice machine nameplate (located on the back panel) for the voltage requirements, and minimum
circuit ampacity. The ice machine requires a solid chassis to earth ground.
Connect the ice machine to its own electrical circuit so it is individually fused. Voltage variation must remain
within the limitations, even under starting conditions.
Note: All external wiring must conform to national, state and local electrical codes.
The use of a licensed electrician is required to perform the electrical installation.
Water Cooled Models
Electrical Inlet
Power
Supply
Air Cooled Models
Page 14
GEM-MFI SERIES For the Electrician
INSTALLATION MUST CONFORM TO ALL APPLICABLE CODES.
Connect the electrical power to the unit to the wires in the junction box at the rear of the machine. Check the
nameplate (located on the back panel) for the voltage requirements, and for the minimum circuit ampacity.
The machine requires a solid chassis to earth ground wire.
Connect the ice machine to its own electrical circuit so it is individually fused. Voltage variation must remain
within design limitations, even under starting conditions.
There is a separate junction box for the remote condenser fan motor. Install an interconnecting wire between
the remote condenser and the junction box at the back of the ice machine.
The remote condenser must be wired to the ice machine in accordance with local and national electrical codes
with a minimum of 18 AWG. wire with a ground bonding wire connected to the ground screw provided in both
the condenser and machine field wiring boxes. All outdoor wiring must be in rainproof conduit.
All external wiring must conform to national, state and local electrical codes. The use of a licensed
electrician is required to perform the electrical installation.
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