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 congured 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 ecient 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 dierential
(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
Air-Cooled Refrigeration Systems
46"
Dimensional Data
Multi-Pak Model MC-1Multi-Pak Model MC-2
41"
94"
94"
63"
43"
43"
36"
63"
36"
70"
63"
64"
51"
64"
Multi-Pak Model MC-3Multi-Pak Model MC-4
94"
124"
70"
46"
70"
46"
94"
51"
51"
70"
46"
46"
64"
46"
70"
70"
124"
70"
70"
Maximum
Total HP
5
8
14
20
Maximum Number
of Compressor Spaces
May contain up to 6 fractional
3
hermetic condensers
May contain up to 10 fractional
5
hermetic condensers.
May contain up to 14 fractional
7
hermetic condensers.
May contain up to 16 fractional
9
hermetic condensers.
Physical Data
Number of
Condenser Fans
.
143"63"41"750
LengthWidthHeight
Dimensions (In.)
Approximate
Weight (lbs.)
264"70"51"1100
394"70"51"1450
4124"70"51"2000
5
Job Information Request Form
Outdoor, Vertical Discharge Multi-Circuited Condensing Unit
General Data
Customer
Location
Sales Branch
Contact Name
Contact Phone Number
Date
Required VoltageVoltsPhaseCycle or HZ
Fused Disconnect Switch
Refrigeration Data
*
System
*
Circuit
*
Cabinet
Temperature
In º F
*
Evaporator
Temperature
In º F
*
Refrigerant
*
Defrost Type
Required Capacity
in BTU
*
Requested
Compressor
Existing
RDI
STD Model #
* Required Information
Note: Cooler Temperature Systems Will Be Sized for 16 HR Run Time or Less at 90° Ambient
Note: Freezer Temperature Systems Will Be Sized for 18 HR Run Time or Less at 90° Ambient
Accessory Data
System
Defrost
Type
Suction
Accumulator
Suction
Filter
Vibration
Eliminator
Oil
Separator
Standard Equipment:
• Drier
• Sight Glass
• Receiver with Shut-Off Valve
• Head Pressure Control (Headmaster)
• Vibration Eliminators on
Semi-Hermetic Compressors
• Suction and Discharge
Shut-off Valve on Semi-Hermetic
Compressors
• Fixed Low Pressure Control
• Fixed High Pressure Control
• Defrost Clock (With
Contactor and Circuit Protection
When Needed)
• Single Point Electrical Connection
• Circuit Breaker per Compressor Circuit
6
Warranty
RDI Parts and Labor Warranty (11-5-04)
All invoices submitted for consideration under RDI’s
parts and labor warranty must include the product serial
number and must be received by RDI within 60 days of
the date of service�
Parts Coverage
One (1) year from original start up date but no more
than fteen (18) months from ship date RDI will at it’s
option repair, replace, or reimburse for local purchase
of parts or assemblies found to be defective in material
or workmanship� Reimbursement for local purchase will
require a copy of the wholesale invoice and a maximum
20% markup� During the first year defective compressors
shall be exchanged over the counter by the compressor
manufacturer’s wholesaler� RDI will match the standard
3-year parts-and-labor warranty provided by Manitowoc
Ice on all components attached to the Manitowoc ice
machine�
Labor Coverage
RDI systems are covered by a 30 day labor warranty for
the replacement of component parts which are defective
in material or workmanship� The warranty period begins
on the original start up date but no more than 18
months from ship date� RDI reserves the right to pay
maximum hourly rates equal to the average commercial
hourly rates within that territory or region of the country�
General Conditions
This warranty is issued only to the original purchaser-user
at the original installation location and is in lieu of all
other warranties expressed or implied�
Following the expiration of the basic parts warranty,
replacement parts purchased from RDI shall be
warranted for parts replacement and shipping only for a
period of ninety days from ship date�
Exclusions From Warranty Coverage
1. Normal maintenance and adjustments such as
temperature controls, thermal expansion valves,
defrost timers and cleaning�
2. Repairs due to unauthorized modications of
warranted equipment�
3. Damage or failure caused by improper installation,
improper electrical supply, re, ood, or other natural
disasters, acts of terrorism or war.
4� Damage or delays occurring in transit�
5. Parts or assemblies subject to misuse, abuse, neglect
or accidents�
6. Damage or loss of any products, property, loss of
income or profit due to malfunctioning of sold unit�
Extended Compressor Coverage
If the optional four (4) year compressor warranty is
purchased and the original compressor fails after the
expiration of the one (1) year parts warranty. RDI will
provide a replacement compressor for the condensing
unit assembly� RDI will at it’s option provide directly or
authorize local purchase of the replacement compressor.
If local purchase is authorized the wholesale invoice
along with the serial tag from the original defective
compressor shall be sent to RDI for reimbursement� In
some instances the entire failed compressor may be
required. Labor, freight/transportation, and additional
parts/supplies are not covered.
2915 T en nessee A ve n or Th , PA rs on s, T n 3836 3 • 1-877-759- 9019 • FAx 1- 731-847-901 2
SolutionS
RDI provides many of the operational solutions from Manitowoc Foodservice, a global company dedicated to bringing
value to foodservice operators by equipping them with highly individualized real-world answers that enhance menus,
service, profits and efficiency.
To learn how Manitowoc Foodservice and its leading brands can equip you, visit our global web site at
www�manitowocfoodservice�com then find the regional or local resources available to you�