Manitowoc Ice MC-104L-2 User Manual

Multi-Circuit Condensers

®

with CVD Technology

Now approved
for use with Manitowoc
QuietQube® Ice Machines

CONTENTS

Multi-Pak Advantages � � � � � � � � � � � � � � � � � � � � � � � � � � � � 3

Multi-Pak Refrigeration Systems � � � � � � � � � � � � � � � � � � 4

Dimensional Data � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � 5

Job Information Request Form � � � � � � � � � � � � � � � � � � � 6

Warranty � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � 7

2

MULTI-PAK • Multi-circuit Condensing Unit

The all new Multi-Pak is a multi-circuited vertical discharge condensing unit that can be configured to handle multiple
compressors� The MC1 single fan model is capable of handling up to three compressors with a maximum of 5 HP� The
MC2 two fan model is capable of handling up to five compressors with a maximum of 8 HP� The MC3 three fan model is
capable of handling up to seven compressors with a maximum of 14 HP� The MC4 four fan model is capable of handling
nine compressors with a maximum of 20 HP�

Multi-Pak Advantages:

• Available with Hermetic, Semi-hermetic or S

croll compressors

• Installer has only one unit to mount (reduces the

amount of space required)

• Single point electrical connection

• Condenser circuits may be allocated for use with

ice machines or other condenser requirements

• Easily removable panels for service

• Timer for electric defrost application is mounted

and pre-wired

• Compressors are individually protected

(circuit breakers)

• Crank case heaters only come on when unit

is in off-cycle (reduces excess heat that the

compressors have to overcome during warm

conditions and reduces energy consumption

• Head master valves (allows refrigerant to bypass he

condenser coil during cold weather conditions by

maintaining a minimum head pressure)

• Color-coded wiring

• All units have liquid line sight glass and dryer

• Single energy efficient 1/2 HP (1100 RPM)

PSC fan motor

• Large 24" diameter fan blade

• Exterior finish 18 Ga. G90 galvanized

• Unique placement of air intake louvers

provides maximum air flow over compressors

for cooler operation

• Provided with weather-proof housing

• Adjustable low pressure control

• Refrigerant lines piped for roof curb or ground

pad connections

overall)

The flexibility of this

unit makes it ideal for

walk-in cooler/freezer

applications, as well

as ice machines

and other remote

condenser needs.

3

Multi-pak • Multi-circuit Condensing

Multi-Pak Refrigeration System

The Multi-Pak refrigeration system will be ETL Listed to

UL Standard 1995, and may be located either on the roof
of the building, or, on a pad outside of the building. The
condensing unit consists of compressors, multi-circuit
condenser, receivers, and electrical panel, all located

within a weatherproof outdoor housing� The evaporator

coils supplied as part of the system, are complete with

all of the accessories required� All of the component

parts, and required options and accessories will be
mounted, wired, and piped as required. The system will
be manufactured to operate at either 208-230/1/60,
or, 208-230/3/60. This unit can also be congured to

support remote condenser loads�

Weatherproof Outdoor Housing

The Outdoor Weatherproof Housing is fabricated

of either 18 ga. G90 galvanized or 20 ga. stainless

steel� Each panel of the housing is removable for
complete access to the interior of the unit for servicing�
The perimeter rails are punched with openings to
accommodate spreader bars for lifting purposes�

Compressors and
Multi-Circuit Condenser

All compressors shall be Hermetic, Semi-Hermetic or

Scroll� Compressors are available to operate R-404A as
standard refrigerant but may be supplied with others
when required� Each compressor will be charged
with the appropriate refrigerant oil as required� Each
compressor will be provided with discharge and suction

vibration isolation (vibrasorbers will be provided on

semi-hermetic compressors)� Each compressor system

will include a dual pressure control, liquid line lter/drier,
sight glass w/moisture indicator, crankcase heater, and

receiver tank� Each receiver tank will be provided with
an isolation valve and access port at its outlet and are

sized to accommodate the required refrigerant charge,

without exceeding its capacity� The capacity can be
exceeded if the lines are too long�

The multi-circuit condenser system includes up to four

1/2 HP, PSC energy ecient fan motors with a 24” fan

blade mounted in a formed venture fan orifice� The

fan motor/blade assembly is protected by a coated

fan guard� Each compressor and condenser circuit is

equipped with “headmaster” ooded condenser head
pressure control. The compressor/condenser circuit is
sized to operate at an average temperature dierential
(TD) between the ambient and condensing temperature

of 20°F�

Electrical Control Panel

The weatherproof electrical control panel is mounted

on the interior of the housing, and is fabricated of
18ga. Galvanized steel. The control panel is equipped
with circuit breakers for each compressor system,
contactors, auxiliary contacts, fuses, defrost time clocks,
and compressor starting components (for single phase
operation). A color-coded wiring diagram is provided,

and mounted to the interior of the removable access

panel. The wiring is color coded per the diagram, and is

held in place with the appropriate fasteners� The entire
electrical system is protected by an exterior mounted
NEMA 3R rated fused disconnect switch�

Refrigeration System Piping

The refrigeration system piping is routed within the
housing so the installation contractor can pipe the
lines through the roof for roof curb applications or
through protective bushings in the lower perimeter rail

for ground pad mounting. Each set of liquid/suction

lines will be identified as to the system they serve� All
refrigeration piping will be A�C�R� grade refrigeration

copper, and will be held in place with tubing straps. All
suction lines shall be covered with 1/2” thick insulation

tube� The entire condensing unit assembly shall be
tested at a minimum of 250 psig for leaks� The system
will be shipped with a 50psig holding charge of
dry nitrogen�

Evaporator Coils

The evaporator coils will be mounted inside each walk­in compartment� Each evaporator coil will include a

thermostatic expansion valve (matched to the system
capacity requirements), liquid line solenoid valve (for
pump down), and a temperature control. If two or more
evaporators are required for a system, the solenoid

valve will be mounted on each evaporator and the
temperature control is shipped loose for field installation
in a central location�

4