How the multiplex works, Water bath access, Service access – Manitowoc Ice MULTIPLEX 11M User Manual
Page 32: Sequence of operation, Pre-mix refrigeration unit, Ice bank is required
 
Operation
Section 3
3-2
How the Multiplex Works
The Model 11M is a 1/2 HP refrigeration unit that will 
provide premix carbonated beverages and chilled 
carbonated water for up to 12 gal (45 L) of 
syrup/day or 560 drinks/day (4,000 gal/year) with a 
100 ft (30 m) maximum conduit length. This is a remote 
refrigeration unit that derives its peak draw capacity from 
the reserve ice bank produced from a capillary tube 
refrigeration system. This system is controlled to cycle 
ON and OFF by the operation of the ice bank control. 
The sensing bulb that controls the ice bank is located on 
an adjustable bracket in the water bath.
WATER BATH ACCESS
SERVICE ACCESS
Sequence of Operation
PRE-MIX REFRIGERATION UNIT
Ice Bank Is Required
1. Check water bath for full ice bank.
2. The stabilized water bath operating temperature
must be maintained at 33°F (0.6°C) to 35°F (1.7°C).
The following is a sequence of operations for the 
Multiplex Pre-mix Beverage equipment. 
1. Once a drink is dispensed, the following will occur:
A. For a Syrup Tank System, the Pre-mix syrup is
manually mixed at the store. Pre-mix beverage 
is then transferred to a holding tank for supply to 
the Multiplex system. 
B. For a Bag-In-Box System, pre-mix syrup is
drawn from a Bag-In-Box by means of a gas 
driven syrup pump. 
2. The brix pump mixes a 5:1 ratio pre-mixer syrup and
water into a 3 gallon holding tank located in the 
pump box (the 3 gallon tank is vented to 
atmosphere). 
3. The carbonator pump (stainless) pulls the 5:1
pre-mix out of the 3 gallon holding tank and injects it 
into the pre-mix carbonator tank where the CO
2
pressure is 35 psi (2.4 bar) on the tank.
4. The circulator pump runs continuously and
circulates water bath water through the conduit to 
provide cooling for all drinks.
• End panel has two ovals in the rear of the panel with
edge trim to help protect conduit lines.
• Has a round hole in the front and back panels with
no edge trim to protect lines.
• Front panel was solid and did not allow easy access for service.
• Switch panel was mounted flush to end panel.