In accordance with our policy of continuous product development and improvement,
this information is subject to change at any time without notice.
EI219360 Issued (JMT/KAK) 6 March, 2001
Manitowoc Beverage Equipment
2100 Future Drive Sellersburg, IN 47172-1868
Tel: 812.246.7000, 800.367.4233 Fax: 812.246.9922
www.manitowocbeverage.com
Foodservice Group
Multiplex Beverage Equipment Installation Instructions for
Electronic Temperature Control Retrofit Kit
for Model 75 Beermaster Glycol Chiller
P.N. 00219360
This kit is designed to replace the existing Ranco mechani-
cal temperature control in a Multiplex Model 75 Beermaster
Glycol Chiller. The Electronic Temperature Control (ETC) is
mounted under the top cover of the Model 75 Beermaster Gly-
col Chiller and provides a constant display readout of the sen-
sor temperature. It will be readily visible by lifting the top
cover of the unit.
Installing the electronic temperature
control retrofit kit
Tools Required
Screwdriver,
5
/32" Tip
Screwdriver,
1
/4" Tip
Screwdriver, #2 Phillips
Nut Driver,
5
/16"
Wire Cutter/Stripper
Installation
1. Turn “off” all control switches on unit.
2. Disconnect electrical power at branch circuit disconnect.
For cord-connected units, simply unplug the power cord.
3. Remove the cover panel from unit.
4. Remove the access panel from switch/control box.
5. Remove cover from temperature control mounted to bulk-
head.
6. Loosen two (2) terminal screws and disconnect both brown
wires.
7. Pull wires back through hole in bottom of control.
8. Cut the terminal connectors off the brown wires and strip
the wire ends
5
/16". Note that one (1) of the wires is at-
tached to one (1) of the control switches and the other
wire is routed to the refrigeration compressor.
9. From the opposite side of the bulkhead, loosen and re-
move two (2) screws that secure the temperature con-
trol. Remove the temperature control from the unit.
10. Position the ETC assembly where the holes in the rear
flange of the mounting bracket align with the holes in the
bulkhead, and the holes in the mounting bracket front
flange align with the two (2) holes in the front flange of
the motor shelf.
11. Secure the ETC assembly with two (2) #10 Phillips head
screws through the bulkhead holes, and with two (2) #10
hex head screws into the motor shelf.
Note: The screws into the motor shelf are self-threading
screws. Use a 5/16" nut driver to install.
12. Route the blue and brown wires extending from the ETC
into the switch/control box via the wire opening in the
bottom of the box.
13. Disconnect the two (2) wire nuts, add the blue and brown
wires to their respective wire groups, and reconnect the
wire nuts.
14. Loosen the four (4) screws in the ETC cover and open the
ETC.
15. Route the two (2) newly stripped brown wires formerly
connected to the old temperature control through the
opening in the end of the ETC.
16. Insert the stripped end of the wire from the control switch
into opening marked “C” of the ETC lower terminal block.
Tighten the pressure screw to secure the wire.
17. Insert the other stripped wire end into the adjacent open-
ing, marked “NO”. Tighten the pressure screw to secure
the wire.
18. Replace the cover on the ETC and temporarily secure by
partially starting two (2) diagonal screws (the cover will
be removed again later).
19. Route the sensor cord through an opening in the bulkhead
to the glycol tank
20. Using cable ties, secure the sensor to the bracket attached
to the evaporator.
21. Attach the cover plate to the switch/control box.
2
EI219360 Issued (JMT/KAK) 6 March, 2001
Equipment Installation Instructions
Caution: To Avoid Serious Injury
Important: Read the following warnings before beginning an installation. Failure to do so
may result in possible death or serious injury.
DO Adhere to all National and Local Plumbing and Electrical Safety Codes.
DO Turn “off” incoming electrical service switches when servicing, installing, or
repairing equipment.
DO Check that all flare fittings on the carbonation tank(s) are tight. This check
should be performed with a wrench to ensure a quality seal.
DO Inspect pressure on Regulators before starting up equipment.
DO Protect eyes when working around refrigerants.
DO Use caution when handling metal surface edges of all equipment.
DO Handle CO
2 cylinders and gauges with care. Secure cylinders properly against
abrasion.
DO Store CO2 cylinder(s) in well ventilated areas.
DO NOT Throw or drop a CO2 cylinder. Secure the cylinder(s) in an upright position
with a chain.
DO NOT Connect the CO2 cylinder(s) directly to the product container. Doing so will
result in an explosion causing possible death or injury. Best to connect the
CO2 cylinder(s) to a regulator(s).
DO NOT Store CO2 cylinders in temperature above 125°F (51.7°C) near furnaces,
radiator or sources of heat.
DO NOT Release CO2 gas from old cylinder.
DO NOT Touch Refrigeration lines inside units, some may exceed temperatures of
200°F (93.3°C).
Notice: Water pipe connections and fixtures directly connected to a potable water supply
shall be sized, installed and maintained in accordance with Federal, State, and Local codes.
3
EI219360 Issued (JMT/KAK) 6 March, 2001
Equipment Installation Instructions
How to operate the electronic
temperature control
The LCD display provides a constant readout of the sensor
temperature and indicates if the output relay is energized.
The output relay controls operation of the refrigeration com-
pressor. When the S1 annunciator is constantly illuminated
during operation, the relay is energized and the compressor
should be running. The display is also used in conjunction with
the keypad to adjust the set-point temperature and differen-
tial.
Set-up
The temperature set-point refers to the temperature at
which the normally open (NO) contacts of the output relay
will open. The differential refers to the number of degrees
between the set-point temperature and the temperature at
which the NO contacts close. The differential may be set for a
heating mode or cooling mode. For the cooling mode, the dif-
ferential is above the set-point. The relay will de-energize as
the temperature falls to the set-point. It will energize when
the temperature rises above the differential.
Programming
1. Connect power to Multiplex Model 75 Beermaster Glycol
Chiller.
2. To program the ETC, press the SET (
) key once to access
the Fahrenheit/Celsius mode. The display will show the
current status, either F for degrees Fahrenheit or C for
degrees Celsius. Then press either the up arrow (
) or
down arrow ( ) key to toggle to the F designation.
3. Press the SET (
) key again to access the set-point. The
LCD will display the current set-point and the S1 annun-
ciator will be blinking “on” and “off” to indicate the
control is in the set-point mode. Then press the
up arrow (
) or down arrow ( ) key to set the set-point
at 28.
4. Press the SET (
) key again to access the differential.
The LCD will display the current differential and the DIF 1
annunciator will be blinking “on” and “off” to indicate
that the control is in the differential mode. Press the ap-
propriate up arrow (
) or down arrow ( ) to set the dif-
ferential to 2.
5. Press the SET (
) key again to access the cooling or heat-
ing mode. The LCD will display either C1 or H1. If H1 is
displayed, press either the up arrow (
) or down arrow ( )
to toggle to C1. Press the SET (
) key once more and
programming is complete.
Note: The ETC will automatically end programming if no keys
are depressed for a period of thirty seconds. Any settings that
have been input to the control will be accepted at that point.
All control settings are retained in non-volatile memory if
power to the ETC is interrupted for any reason. Re-program-
ming is not necessary after power outages or disconnects un-
less different control settings are required.
Lockout Switch
The ETC is provided with a lockout switch to prevent tam-
pering by unauthorized personnel. When placed in the LOCK
position, the keypad is disabled and no changes to the set-
tings can be made.
To access the lockout switch, disconnect the power supply
and open the control cover. The switch is located on the inside
of the cover about 2 inches above the bottom. To disable the
keypad, slide the switch to the left LOCK position.
After programming is complete and the control is locked,
place the ETC cover in position and tighten the four (4) screws.
Replace top cover of the Multiplex Model 75 Beermaster Gly-
col Chiller, restore power to the unit, and turn control switches
“on”. Verify settings and display after refrigeration has stabi-
lized and cycled “on” and “off”.
4
EI219360 Issued (JMT/KAK) 6 March, 2001
Equipment Installation Instructions
Troubleshooting Error Messages
Display Error/Problem How to Correct
E1 Appears when either the up arrow ( ) or If the E1 message appears even when no keys are
down arrow (
) key is pressed when not in the being pressed, replace the control.
programming mode.
E2 Appears if the control settings are not properly Check all settings and correct if necessary.
stored in memory.
EP Appears when the probe is open, shorted, or Check to see if the sensed temperature is out of
sensing a temperature that is out of range. range. If not, check for probe damage by
comparing to a known ambient temperature
between –30°F and 220°F. Replace the probe if
necessary.
EE Appears if the EEPROM data has been corrupted. This condition cannot be field repaired. Replace
the control.
CL Appears if the calibration mode has been entered. Disconnect power to the control for at least
5 seconds. Reconnect power. If the CL message
still appears, replace the control.
/
