IMI CORNELIUS INC.
One Cornelius Place
Anoka. MN 55303-6234
Telephone (800) 238–3600
Facsimile (612) 422–3246
COPPER EVAPORATOR COIL KIT (P/N 185216000)
ON
UNIVERSAL 750 PRE-MIX DISPENSER
IMPORTANT: Only qualified Personnel should install this Kit.
INTRODUCTION
The purpose of this kit is to replace the original expanded aluminum evaporator, which also doubles as the water bath tank, with a new copper tube style evaporator. The old aluminum evaporator remains in place as the
water bath tank only.
A new anode and refrigeration system dual inlet strainer/dryer are also included with the kit and must be installed.
Retain these instructions as part of your equipment manual.
UNPACKING THE KIT
Unpack and inspect the kit. Make sure Loose-Shipped Parts are present and in good condition (see Figure 1).
Table 1. Loose-Shipped Parts
Item
No. Part No. Name Qty.
1 319238088 Suction Line Ass’y 1
2 186843000 Anode 1
3 187969000 Sheet Metal Screw, Phil Pan Hd, Type ‘‘A’’ Alum; No. 10 by 1/2-in. 1
4 185215000 Copper Evaporator Coil 1
5 319225000 Coil Spacer 4
6 320389000 Thread Rolling Screw, Phil Pan Hd, No. 6-32 by 1/4-in. 4
7 960050 Rubatex Insulation, 6-ft. long 1
8 2601 Strainer Dryer, Dual Inlet 1
9 189159001 Instructions 1
REQUIRED SUPPLIES AND EQUIPMENT
Supplies required are as follows:
Brazing alloy ‘‘Phos-Copper’’, ‘‘Silfos’’ or equivalent is required for copper-to-copper connections. These alloys
contain about 15% silver.
Brazing alloy. ‘‘Easy-flow’’ or equivalent is required for copper-to-steel connections. This alloy contains about
50% silver.
EIMI Cornelius Inc; 1984-91
Revised: December 10, 1991
November 30, 1984
189159001
Flux for use with copper-to-steel connections.
Principal equipment needed for installing this kit is listed in the following table. Equivalent items may
be substituted.
REQUIRED EQUIPMENT
Item
No.
1 Torch, Oxy-fuel (acetylene, propane, etc.) Brazing
2 Torch Tips size No. 2 or 3 Brazing
3 Vacuum pump and gaging with 50-micron blank-off pressure. Alternately a pump
having 28.5; HD minimum.
4 Refrigerant recovery system Removing refrig-
5 Charging cylinder, visual indicating type with a refrigerant R-12 or R-502 scale
and temperature correction curve, or a closed container with an accurate scale.
Charging equipment must be accurate to .025 oz.
6 Pinch-off tool To seal process
7 Ammeter, clamp-on type 0–50 amp range To measure
8 Voltmeter, 0–300 VAC To measure line
9 Ohmmeter, 0–10 and 100,000 ohms To check resis-
10 Leak detector, capable of detecting at least 1/2-ounce/year. To detect refriger-
11 Dry Nitrogen (–75° F dewpoint) To purge system
12 Tap line valve (2) To make connec-
Name and Description Use
Removing air
from system
erant from system
Charging the
reworked system
lines after
charging
power
voltage
tance of electrical
circuitry
ant leaks
before charging
tion to refrigerant
recovery system
DISASSEMBLY
1. Disconnect electrical power to the unit.
2. Melt ice bank and drain the tank.
3. Remove four screws securing unit top cover, then lift cover straight up off unit.
Unit with sealed evaporator tank only.
A. Disconnect agitator motor ground wire and power cord.
B. Disconnect product inlet line swivel nut connectors from product coil line fittings on agitator motor and
cover assembly. MAKE SURE LINES ARE LABELED FOR IDENTIFICATION SO THAT THEY MAY
BE RECONNECTED TO PROPER FITTINGS ON COVER ASSEMBLY.
C. Remove hex nuts securing product coil line fittings to cover assembly.
D. Remove screws securing cover assembly to unit, then lift cover straight up to remove. BE CAREFUL
NOT TO LOSE RUBBER WASHERS ON COIL FITTINGS.
189159001
2
E. Pull ice bank control sensing bulb up out of holder in product coil basket and lay off to one side. BE
CAREFUL NOT TO KINK CAPILLARY TUBE.
F. Disconnect anode wire from evaporator tank, then remove anode from holder in product coil basket.
Discard old anode.
Unit Without sealed evaporator tank.
G. Disconnect agitator motor power cord.
H. Pull ice bank control sensing bulb up out of holder in product coil basket and lay off to one side. BE
CAREFUL NOT TO KINK CAPILLARY TUBE.
I. Disconnect anode wire from evaporator tank, then remove anode from holder in product coil basket.
Discard old anode.
J. Remove two screws on each side securing agitator motor to evaporator tank.
4. Disconnect product lines from back of dispensing valves sleeves. MAKE SURE LINES ARE LABELED
FOR IDENTIFICATION SO THAT THEY MAY BE RECONNECTED TO PROPER VALVES.
5. Remove shank nuts from back of dispensing valves sleeves. Remove valves and sleeves, spacers, plate,
and plate gasket from unit.
6. Unit without sealed evaporator tank.
A. Pull unit product inlet lines up through unit cabinet far enough to allow product coil basket and agitator
motor to be lifted up and out of evaporator tank.
B. Very carefully, lift product coil basket and agitator motor up out of evaporator tank and lay them off to
one side.
7. Unit with sealed evaporator tank.
A. Very carefully, lift product coil basket up out of evaporator tank and lay them off to one side.
IMPORTANT: If evaporator tank has hole in it allowing water to leak to inside of unit, hole may
be repaired by using locally procured two-part epoxy patch.
8. Facing front of unit (dispensing valve side), remove left and rear lower access grilles for access to refrigeration system.
9. Remove drip tray from unit.
10. Remove four screws above and three screws below lower front access grille securing front panel to unit.
11. Remove three screws above and one screw below lower left access grille securing left-side panel to unit.
12. Remove five screws securing left (facing dispensing valve side of unit) side corner securing front and
left-side panels together.
13. Pull left and front side panels apart in preparation to route new SUCTION LINE ASS’Y (item 1) copper lines
from lower part of unit to inside of evaporator tank.
Removal of Refrigerant. In starting work, be advised that the following warnings, cautions and notes are
directly applicable:
WARNING: to avoid possible fatal electric shock or serious injury, disconnect electrical
power from the unit before starting kit installation.
WARNING: To avoid electrical shock even after electrical power has been disconnected
from the Unit, discharge the start capacitor by momentarily touching both terminals at the
same time using an insulated screwdriver.
3 189159001