Premisys MP User manual

Installation, Operation and Maintenance Manual
Please read and save these instructions for future reference. Read carefully before attempting to assemble, install,
operate or maintain the product described. Protect yourself and others by observing all safety information. Failure
to comply with instructions could result in personal injury and/or property damage!
1
Packaged and Split Rooftop Ventilator
PremiSys
Document 479650
Models MP, MPE and MPF
Packaged and Split Rooftop Ventilator
© 2021 Mitsubishi Electric US, Inc.
General Safety Information
WARNING
The roof lining contains high voltage wiring. To prevent
electrocution, do not puncture the interior or exterior
panels of the roof.
DANGER
• Always disconnect power before working on or near
this equipment. Lock and tag the disconnect switch or
breaker to prevent accidental power up.
• If this unit is equipped with optional gas accessories,
turn off gas supply whenever power is disconnected.
CAUTION
This unit is equipped with a compressed refrigerant
system. If a leak in the system should occur,
immediately evacuate the area. An EPA Certified
Technician must be engaged to make repairs or
corrections. Refrigerant leaks may also cause bodily
harm.
CAUTION
When servicing the unit, the internal components may
be hot enough to cause pain or injury. Allow time for
cooling before servicing.
Only qualied personnel should install and maintain this
system. Personnel should have a clear understanding of
these instructions and should be aware of general safety
precautions. Improper installation can result in electric
shock, possible injury due to coming in contact with
moving parts, as well as other potential hazards. Other
considerations may be required if high winds or seismic
activity are present. If more information is needed,
contact a licensed professional engineer before moving
forward.
1. Follow all local electrical and safety codes, as well as
the National Electrical Code (NEC), the National Fire
Protection Agency (NFPA), where applicable. Follow
the Canadian Electrical Code (CEC) in Canada.
2. All moving parts must be free to rotate without striking
or rubbing any stationary objects.
3. Unit must be securely and adequately grounded.
4. Do not spin wheel faster than maximum cataloged
fan RPM. Adjustments to fan speed signicantly
a󰀨ect motor load. If the fan RPM is changed, the
motor current should be checked to make sure it is
not exceeding the motor nameplate amps.
5. Verify that the power source is compatible with the
equipment.
6. Never open access doors to the unit while it is
running.
Models MP/MPE (Packaged DX) Model MPF (Split DX)
Premi Sys

2Packaged and Split Rooftop Ventilator
© 2021 Mitsubishi Electric US, Inc.
PremiSys
General Safety Information ......................1
Receiving, Handling, Storage ....................3
Product Overview .............................4
Subassemblies ...............................5
Installation ...................................6
Electrical Information..........................13
Indirect-Gas Piping Installation ..................14
Water Coil Piping Installation ...................15
Split DX Piping Installation .....................16
Control Center Components ....................20
Component Operation .........................21
Optional Component Operation. . . . . . . . . . . . . . . . . .21
Factory-Installed Refrigeration Systems ...........25
Start-Up – Unit. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .30
Start-Up – Components. . . . . . . . . . . . . . . . . . . . . . . .35
Optional Polymer Energy Wheel .................37
Optional Aluminum Energy Wheel ...............39
Troubleshooting..............................40
Routine Maintenance .........................49
Maintenance Procedure .......................50
Reference
Rated Airflow ....................... Backcover
Table of Contents

3
Packaged and Split Rooftop Ventilator
© 2021 Mitsubishi Electric US, Inc.
PremiSys
Receiving
This product may have been subject to road salt during
transit. If so, immediately wash o󰀨 all visible white
reside from all exterior surfaces. Upon receiving the
product, check to ensure all line items are accounted
for by referencing the delivery receipt or packing list.
Inspect each crate or carton for shipping damage before
accepting delivery. Alert the carrier if any damage is
detected, do not refuse shipment. The customer shall
make notation of damage (or shortage of items) on the
delivery receipt and all copies of the bill of lading which
should be countersigned by the delivering carrier. If
damaged, immediately contact your manufacturer’s
representative. Any physical damage to the unit after
acceptance is not the responsibility of the manufacturer.
Handling
Units are to be rigged and moved by the lifting brackets
provided. Location of brackets varies by model and size.
Handle in such a manner as to keep from scratching or
chipping the coating. Damaged nish may reduce ability
of unit to resist corrosion.
Unpacking
Verify that all required parts and the correct quantity
of each item have been received. If any items are
missing, report shortages to your local representative to
arrange for obtaining missing parts. Sometimes it is not
possible that all items for the unit be shipped together
due to availability of transportation and truck space.
Conrmation of shipment(s) must be limited to only items
on the bill of lading.
Storage
Units are protected against damage during shipment. If
the unit cannot be installed and operated immediately,
precautions need to be taken to prevent deterioration of
the unit during storage. The user assumes responsibility
of the unit and accessories while in storage. The
manufacturer will not be responsible for damage during
storage. These suggestions are provided solely as a
convenience to the user.
The ideal environment for the storage of units and
accessories is indoors, above grade, in a low humidity
atmosphere which is sealed to prevent the entry of
blowing dust, rain, or snow. Units designed for outdoor
applications may be stored outdoors. All accessories
must be stored indoors in a clean, dry atmosphere.
Indoor
Maintain temperatures evenly to prevent condensation.
Remove any accumulations of dirt, water, ice, or snow
and wipe dry before moving to indoor storage. To
avoid condensation, allow cold parts to reach room
temperature. Leave coverings loose to permit air
circulation and to allow for periodic inspection.
The unit should be stored at least 3½ in. (89 mm) o󰀨
the oor. Clearance should be provided to permit air
circulation and space for inspection.
Outdoor
The unit should be placed on a level surface to prevent
water from leaking into the unit. The unit should be
elevated so that it is above water and snow levels.
Ensure su󰀩cient support to prevent unit from settling into
soft ground. Locate parts far enough apart to permit air
circulation, sunlight, and space for periodic inspection.
To minimize water accumulation, place all unit parts on
blocking supports so that rain water will run o󰀨.
Do not cover parts with plastic lm or tarps as these
cause condensation of moisture from the air passing
through heating and cooling cycles.
Inspection and Maintenance
While in storage, inspect units once per month. Keep a
record of inspection and maintenance performed.
If moisture or dirt accumulations are found on parts,
the source should be located and eliminated. At each
inspection, rotate the fan wheel by hand ten to fteen
revolutions to distribute lubricant on motor. If paint
deterioration begins, consideration should be given to
touch-up or repainting. Units with special coatings may
require special techniques for touch-up or repair.
Machined parts coated with rust preventive should be
restored to good condition promptly if signs of rust occur.
Immediately remove the original rust preventive coating
with petroleum solvent and clean with lint-free cloths.
Polish any remaining rust from surface with crocus
cloth or ne emery paper and oil. Do not destroy the
continuity of the surfaces. Wipe thoroughly clean with
Tectyl®506 (Ashland Inc.) or the equivalent. For hard to
reach internal surfaces or for occasional use, consider
using Tectyl®511M Rust Preventive, WD-40®or the
equivalent.
Removing from Storage
As units are removed from storage to be installed in their
nal location, they should be protected and maintained in
a similar fashion until the equipment goes into operation.
Prior to installing the unit and system components,
inspect the unit assembly to make sure it is in working
order.
1. Check all fasteners, set screws on the fan, wheel,
bearings, drive, motor base, and accessories for
tightness.
2. Rotate the fan wheel(s) by hand and assure no parts
are rubbing.

4Packaged and Split Rooftop Ventilator
© 2021 Mitsubishi Electric US, Inc.
PremiSys
A horizontally congured High Percentage Outdoor
Air unit designed for installation outdoors. The unit
is designed to replace air that is exhausted from the
building and also heat and cool, as needed. The air
volume produced by the unit is constant, but can be
optionally modulated to provide a variable air volume
(VAV).
Cooling
Units have the following cooling options available:
• Packaged DX
• Split DX (model MPF only)
• Air-Source Heat Pump (ASHP)
Units with packaged DX are shipped fully charged with
refrigerant and are ready for operation upon arrival.
Heating
There are four di󰀨erent optional heat sources that can
be ordered for this unit:
• Indirect gas-red furnace with one or two sets of
heat exchangers
• Electric heat with innitely variable SCR control
• Hot water coil (Installed in furnace section)
• Air-Source Heat Pump (ASHP)
Airow Arrangement
The unit is capable of Constant Air Volume (CAV),
Variable Air Volume (VAV), and 100% Outdoor Air.
Safety Listing
Models are listed per ANSI/UL 1995, Heating and
Cooling Equipment and are ETL Certied.
Models and Capacities
Product Overview
Model Cooling Capacity
Packaged DX
MP-0-1 3 to 7 tons
MP-1-1/MPE-1-1 5 to 15 tons
MP-2-1/MPE-2-1 15 to 30 tons
MP-4-1/MPE-4-1 25 to 50 tons
MP-5-1/MPE-5-1 30 to 70 tons
Air-Source Heat Pump
MP-1-1/MPE-1-1 5 to 15 tons
MP-2-1/MPE-2-1 15 to 30 tons
Split DX
MPF-1-1 5 to 12 tons
MPF-2-1 10 to 20 tons
Supplemental Installation, Operation and
Maintenance Manuals
Refer to the following Manufacturer Installation,
Operation and Maintenance Manuals for additional
information:
• Indirect Gas-Fired Heat Modules
• Microprocessor Controller
• M-Net Connection
For information on Service and installation Operation
manual please refer to the manuals in the Outdoor
equipment.
• PUHY-P96T/YKMU
• PUHY-P144T/YKMU
• PUHY-P192T/YSKMU
• PUHY-P240T/YSKMU
• PUHY-EP96T/YNU
• PUHY-EP144T/YNU
• PUHY-EP192T/YSNU (twinned model)
• PUHY-EP240T/YSNU (twinned model)
• TUHYE096(3/4)AN40A(N/B)
• TUHYE144(3/4)AN40A(N/B)
• TUHYE192(3/4 )BN40A(N/B) (twinned model)
• TUHYE240(3/4)BN40A(N/B) (twinned model)

5
Packaged and Split Rooftop Ventilator
© 2021 Mitsubishi Electric US, Inc.
PremiSys
Subassemblies
Supply Filters
All housings are available with a lter bank depth of
either 2 or 4-inch.
Indirect Gas-Fired Furnace
Furnace model PVG is available on housing sizes 0-1,
1-1, and 2-1. Housing size 4-1 uses furnace model PVF
200-600 or model HMA 700-800. Housing size 5-1 uses
furnace model HMA 600-1200.
Packaged DX System
Unit may be ordered with a packaged DX system.
Housing size 0-1 will use one compressor, housing
size 1-1 will include either one or two compressors;
housing size 2-1 will include two compressors; housing
size 4-1 and 5-1 will include four compressors; a
condenser coil(s) and evaporator coil(s) and all needed
components. Units that have packaged DX are charged
with R-410A refrigerant. Do not use tools or parts
designed for other refrigerants on these units.
Air-Source Heat Pump - Units having an air-source
heat pump will include either one or two compressors,
an indoor and outdoor coil, and all required components.
Air-source heat pump units are charged with R410A
refrigerant. Do not use tools or parts designed for other
refrigerants on these units.
Split DX System
Unit may be ordered with a split DX system for
connection to a Mitsubishi Outdoor Unit. All MPF models
are standard with split DX cooling and the energy wheel.
Vestibule - Some units may be ordered with a factory-
assembled vestibule that is to be eld-attached to the
side of the unit. See lifting instructions.
Blower
Either one or two plenum-type fans. All units are
equipped with a plenum fan for Supply Air and a second
may be selected for Exhaust (Relief) Air.
Coils (Packaged)
Evaporator coil
Condenser coil
Hot water coil (Optional)
Reheat coil (Optional)
Coils (Air-Source Heat Pump)
Indoor coil
Outdoor coil
Hot water coil (Optional)
Reheat coil (Optional)
Coils (Split)
Evaporator coil
Hot water coil (Optional)
Reheat coil
Compressors
Each unit having packaged DX will have either one
or two refrigerant compressors. Optionally, one of the
compressors may be a digital or inverter scroll type
compressor. Air-source heat pump units will have one
inverter scroll compressor and may contain a second
staged compressor.
Dampers
Motorized intake air damper, optional motorized
recirculating damper. Optional return air damper.
Optional gravity-type exhaust damper.
Electric Heater
An SCR controlled electric heater (not shown) is
available on the units. It has its own control panel and
may require a separate power supply. See unit-specic
wiring diagram.
Plenum-Type
Supply Air Blower
Indirect Gas-Fired Furnace
(optional)
Intake Air
Damper
Coils
Main Control
Center
Final Filters
(on coil face) Weatherhood Filters
(metal mesh)
Energy Wheel (MPF)
Plenum-Type
Exhaust Air Blower

6Packaged and Split Rooftop Ventilator
© 2021 Mitsubishi Electric US, Inc.
PremiSys
L
W
H
B
A
Installation - Packaged DX
Typical Unit Weights and Dimensions
Component Access
1 Optional Inverter Compressor
2 Optional Compressor/Electrical
3 Optional Gas Furnace/Optional Electric Heater
4 Electrical
5 Supply Blower
6 Coil
7 Filters
8* Exhaust Blower/Optional Electric Preheat
9 Powered Exhaust Blower Section
* When a powered exhaust fan (or MPE) is selected,
door 8 will be to the immediate right of door 7.
W
L
H
A
1
2
3
4
56
7
Housing size 5-1
1
2
3
4
5
6
7
Housing size 1-1
and 2-1
Housing size 4-1
L
W
H
A
1
3
2
3
4
5
6
7
9
8
Housing size 0-1
L
W
A
H
12
4
3
6
7
5

7
Packaged and Split Rooftop Ventilator
© 2021 Mitsubishi Electric US, Inc.
PremiSys
Installation - Packaged DX
Typical Unit Weights and Dimensions
Model
Nominal
tonnage
(tons)
Height
(H)
Width
(W)
Length
(L)
Intake
(A)
Condensing
Section
(B)
Nominal
weight (lbs)
Outdoor
Intake
Supply
Discharge
Return
Intake
Exhaust
Discharge
MP-0-1 3-7 58.1 44.0 82.2922.3 NA 1,180
End
Bottom
or
Side
Bottom or
End2NA
MP-1-1 5-15 59.3 52.5 98.66/149.5722.1 30.1 2,700 Bottom,
End2
or
Side1
End3
or
Side1
MP-2-1 15-30 72.5 68.2 1096/163.2727.7 30.1 4,500
MP-4-1 25-50 101.3 98 155.26/188439/47.58NA 6,500
Bottom,
End11
or
Side1
End
MP-5-1 30-70 99.5 96 185 45.3 NA 7,950 Bottom or
End10 Side
MPE-1-1 5-15 59.3 52.5 149.5/180.5422.1 30.1 3,400
End
Bottom
or
Side
Bottom,
End2
or
Side1
End3
or
Side1
MPE-2-1 15-30 72.5 68.2 163.2/197.2427.1 30.1 5,100
MPE-4-1 25-50 101.3 98 199.65/233.8447.5 NA 8,000
Bottom or
Side
End
MPE-5-1 30-70 99.5 96 2635/307445.3 NA 10,450 Side
All dimensions are shown in inches. Weight is shown in pounds and includes largest supply and exhaust fans, PDX with reheat, largest indirect-gas
red furnace, and all dampers. Actual weights will vary based on the unit conguration.
1Only available with powered exhaust
2Only available without barometric relief
3Only available with barometric relief
4Length with side return
5Length with bottom return
6Length with bottom or end return
7Length with powered exhaust
8Length with powered exhaust bumpout
9
Optional indirect gas-fired furnace bumpout
length is additional 13.3 inches
10
Only available without powered exhaust
11
Only available without powered exhaust and
without barometric relief

8Packaged and Split Rooftop Ventilator
© 2021 Mitsubishi Electric US, Inc.
PremiSys
Installation - Packaged DX
Service Clearance
EXHAUST AIR
WEATHERHOOD
COOLING COIL
HGRH COIL
CONTROL
CENTER
OUTDOOR AIR
WEATHERHOOD
WHEEL CASSETTE
OUTDOOR AIR FILTERS
EXHAUST AIR FILTERS
SUPPLY FAN EXHAUST FAN
NA from Unit
ACS SIDE
CC
OAI
ACCESS DOOR
ACCESS DOOR ACCESS DOOR ACCESS DOOR ACCESS DOOR
CASSETTE REMOVAL
SUPPLY FILTERS
COMPRESSORS
CONDENSING SECTION
NA from CS
Model
ACS
Access
Side
CC
Control Cabinet End
OAI
Outdoor Air Intake
*NA
from Unit
NA
from
Condensing
Section
NA
from Piping
Vestibule
(not shown)
Other
Indoor
Mounted
with IG
Furnace
Outdoor
Mounted
Indoor
Mounted
MP-0-1 50 42 NA 36 NA 24 NA NA
MP-1-1 40 42 72 42 18 24 18 30
MP-2-1 36 58 72 42 18 24 18 30
MP-4-1 48 48 NA 87 NA 48 NA NA
MP-5-1 48 48 NA 60 NA 48 NA NA
MPE-1-1 40 42 72 42 18 24 18 30
MPE-2-1 36 58 72 42 18 24 18 30
MPE-4-1 48 48 NA 87 NA 48 NA NA
MPE-5-1 48 48 NA 60 NA 48 NA NA
All dimensions are shown in inches.
*No condensing section or piping vestibule, or unit has top condensing section.

9
Packaged and Split Rooftop Ventilator
© 2021 Mitsubishi Electric US, Inc.
PremiSys
Installation - Split DX
RA1
LA
OUTDOOR AIR DAMPER
H
SUPPLY BLOWER
EXHAUST AIR
DISCHARGE
RETURN AIR INLET
DX COIL
HGRH COIL
SUPPLY FINAL FILTERS
SUPPLY FILTERS
ENERGY WHEEL
EXHAUST FILTERS SUPPLY AIR
DISCHARGE BOTTOM SUPPLY AIR
DISCHARGE SIDE
INDIRECT GAS HEATER
OUTDOOR AIR
WEATHERHOOD
RA2
RA3 RA4 SB4 SB3
SB1
SB2
CONTROL
CENTER
EXHAUST BLOWER
SS2
SS1
SS3SS4
EXHAUST DISCHARGE
WEATHERHOOD
Service Clearances
Model
A L W H
Unit
Weight
Outdoor
Air WH Qty
Pre-Wheel
Supply/
Exhaust
Filters*
Qty
Supply
Final
Filters
(Pre-coil)
Qty
Outdoor
Air WH Length Width Height
MPF-1-1 22.1 149.5 52.5 59.3 2400 20x20x2 420x25x2†2†20x20x2 4
MPF-2-1 27.1 163.2 68.2 72.5 5100 25x25x2 16x25x2‡4‡16x25x2 8
All dimensions are shown in inches. Weight shown in pounds.
*Size and quantity is per airstream
†Based upon a 30 / 36 in. energy wheel (16x25x2, quantity of 3 for 41 in. energy wheel)
‡Based upon a 52 in. energy wheel (16x16x2, quantity of 8 for 58 in. energy wheel)
WH = weatherhood (aluminum mesh)
Model ACS CC End OA End *PA from Unit
MPF-1-1 36 32 42 24
MPF-2-1 36 58 42 24
All dimensions are shown in inches. *PA from Unit = piping access
ACS = Access
CC = Control Center
PA = Piping Access
OA = Outdoor Air Weatherhood
Typical Unit Weights and Dimensions
OA End
ACS
CC End
CLEARANCE
CLEARANCE
PA

10 Packaged and Split Rooftop Ventilator
© 2021 Mitsubishi Electric US, Inc.
PremiSys
Handling Concerns for
Packaged DX or Air-Source Heat Pump
Units with PDX or ASHP have a system that is
pressurized with refrigerant. If damage occurs, the
refrigerant could leak into the atmosphere or cause
bodily harm due to the extreme cold nature of expanding
refrigerant. Use protective equipment such as gloves
and safety glasses to minimize or prevent injury in case
of a system leak during installation.
Before Lifting
Before lifting, be sure that all shipping materials have
been removed from the unit.
Vestibule
Determine whether or not the unit has a vestibule that
must be eld-attached to the side of the unit. Vestibules
are shipped assembled but detached from the unit. They
have lifting lugs on them so they can also be lifted by
crane, but the installed location of the unit may make
it preferable to install the vestibule on the unit prior to
lifting.
Field Power Access
Determine where high voltage and low voltage wiring is
to be brought into the cabinet. If wiring is to be brought
into the cabinet through the oor, see Alternate Supply
Entry Locations in this manual. If unit is to be installed on
a roof, cut access openings in the roof deck as needed.
Additional Clearances for
Packaged DX Units
Packaged DX units require additional clearance
because they must have unrestricted air movement
around the condenser coil and condenser fans. Hot air
is being discharged from the condenser fans during
operation. Enough clearance must be provided to
avoid recirculation or coil starvation. When equipped
with condenser coils, the unit should never be placed
under an overhang or inside a building. A minimum of
48 inches above the condenser fans is acceptable, but
unobstructed is strongly recommended.
END VIEW OF MAKE-UP AIR UNIT
WITH PACKAGED DX
Minimum 48 inches clearance
Minimum 18 inches
clearance
Condenser Coil
Condenser Fans
End view of rooftop unit with Packaged DX
Installation
Additional Clearances for
Air Source Heat Pump
Air-source heat pump units require additional clearance
because they must have unrestricted air movement
around the outdoor coil and outdoor fans. Enough
clearance must be provided to avoid recirculation or
coil starvation. Air-source heat pump units should never
be placed under an overhang or inside a building.
A minimum of 48-inches above the outdoor fans is
acceptable, but unobstructed is strongly recommended.
IMPORTANT
Air-source heat pumps are equipped with a defrost
cycle to remove ice from the outdoor coil. During
defrost cycles, melted water may drip from the bottom
of the refrigeration section under the outdoor coil.
In cold climates, proper drainage/heat tape must be
installed under the outdoor coil to prevent the buildup
of ice on the roof.

11
Packaged and Split Rooftop Ventilator
© 2021 Mitsubishi Electric US, Inc.
PremiSys
Lifting
1. Ensure that all shipping materials have been
removed from unit.
2. To assist in determining rigging requirements,
weights are provided in the Unit Weights &
Dimensions section of this manual.
3. Unit must be lifted by all lifting lugs provided at top
of unit.
4. Spreader bars must span the unit to prevent
damage to the cabinet by the lift cables.
5. Never rest the spreader bar on the unit.
6. Always test-lift the unit to check for proper balance
and rigging before hoisting to desired location.
7. Never lift unit by weatherhood.
8. Never lift units in windy conditions.
9. Preparation of curb and roof openings should be
completed prior to lifting unit to the roof.
10. Check to be sure that gasketing (supplied by
others) has been applied to the top of the curb prior
to lifting the unit and setting on the curb.
11. Do not use forklifts for handling unit on housing
sizes 1, 2, 4, and 5.
12. If using forklift on housing 0, use forks with 48-inch
length and ensure forks extend to opposite side of
unit using factory-installed forklift pockets at unit
base.
WARNING
Spreader bars are required to prevent damage to the
cabinet, failure to do so can result in damage that is
the installer’s responsibility.
Installation
Roof Curb Mounting
Roof curb details, including duct locations and
dimensions, are to be found in the roof curb assembly
instructions.
Rooftop units require curbs to be mounted rst. The
duct connections must be located so they will be clear of
structural members of the building.
1. Factory-supplied roof curbs. Roof curbs are model
GKD which are shipped in a knockdown kit (includes
duct adapters) and require field assembly (by others)
on all housing sizes except MP-5-1, which are shipped
assembled. Assembly instructions are included with the
curb kit.
2. Install curb. Locate curb over roof opening and fasten
in place. Check that the diagonal dimensions are within
± 1/8 inch of each other and adjust as necessary. For
proper coil drainage and unit operation, it is important
that the installation be level. Shim the curb as required to
level. Install gasketing on top surface of curb (provided
by others).
3. Install ductwork. Installation of all ducts should
be done in accordance with SMACNA and AMCA
guidelines. Duct adapters are provided to support ducts
prior to setting the unit.
4. Set the unit. Lift unit to a point directly above the curb
and duct openings. Guide unit while lowering to align
with duct openings. Roof curbs t inside the unit base.
Make sure the unit is properly seated on the curb and
level.
5. Fasten the unit, Fasten the unit to the curb/
equipment support(s) using appropriate methods. The
installer is responsible for determining appropriate
support and fastening methods to ensure compliance
with all applicable codes.
6. Install vestibule. If unit was ordered with a vestibule
and it has not yet been attached to the unit, caulk and
attach the vestibule at this time.
W
L
L
W
L
W
Typical Unit with Condensing Section and
Factory-Supplied Curb Kit

12 Packaged and Split Rooftop Ventilator
© 2021 Mitsubishi Electric US, Inc.
PremiSys
Typical Unit Installed on Rails Supplied by Others
Rail Mounting and Layout
• The units may be installed on rails provided and
installed by others. Ensure that rails are designed to
handle the weight of the unit and provide proper load
distribution on building supports.
• Make sure that rail positioning does not interfere with
the openings on the unit.
• Rails should run the width of the unit and extend
beyond the unit a minimum of 12 inches on each side.
• Set unit on rails.
Installation
Ductwork Congurations
NOTE
Downblast Discharge Ductwork - whenever
downblast discharge is used, the ductwork directly
beneath the unit must be connected with either a “T” or
an “L” configuration and the area directly beneath the
heat source must not have any openings such as
louvers or grates.
No louvers or grates
Optional Piping Vestibule
If the unit was ordered with the vestibule, the NA (Non-
Access side) clearance dimension must be measured
from the vestibule.
W
L
L
W
L
W
Typical Unit with Piping Vestibule and
Factory-Supplied Curb Kit

13
Packaged and Split Rooftop Ventilator
© 2021 Mitsubishi Electric US, Inc.
PremiSys
WARNING
The roof lining contains high voltage wiring. To prevent
electrocution, do not puncture the interior or exterior
panels of the roof.
WARNING
To prevent injury or death due to electrocution or
contact with moving parts, lock disconnect switch
open. For units with a gas furnace, if you turn o󰀨 the
power supply, turn o󰀨 the gas.
IMPORTANT
Before connecting power to the unit, read and
understand the following instructions and wiring
diagrams. Complete wiring diagrams are attached on
the inside of the control center door(s).
IMPORTANT
All wiring should be done in accordance with the latest
edition of the National Electric Code ANSI/NFPA 70
and any local codes that may apply. In Canada, wiring
should be done in accordance with the Canadian
Electrical Code.
IMPORTANT
The equipment must be properly grounded and
bonded. Any wiring running through the unit in the
airstream must be protected by metal conduit, metal
clad cable or raceways.
CAUTION
If replacement wire is required, it must have a
temperature rating of at least 105ºC, except for an
energy cut-off or sensor lead wire which must be rated
to 150ºC.
DANGER
High voltage electrical input is needed for this
equipment. This work should be performed by a
qualified electrician.
CAUTION
Any wiring deviations may result in personal injury
or property damage. Manufacturer is not responsible
for any damage to, or failure of the unit caused by
incorrect final wiring.
WARNING
Consult your dealer when the following issues on Y
system are the key concern.
• Warm air may flow out from the indoor unit during
heating Thermo-OFF.
• Refrigerant flow sound may occur in the rooms
with low background noise such as hotel rooms,
hospital rooms, bedrooms, or conference rooms.
To avoid the above issues on Y system, changing
board settings on the indoor and outdoor units is
required.
Electrical Information Determine the Size of the Main Power Lines
The unit’s nameplate, located on the outside of the
control panel side, states the voltage and the unit’s
MCA. The main power lines to the unit should be sized
accordingly. Model MPF is provided with a separate
condensing unit with its own disconnect that requires a
separate power feed from the unit.
Determine the Size of Electric Heater Wiring
An optional electric heater may require a separate power
supply. The power connection should be made to the
factory-provided electric heater disconnect and must be
compatible with the ratings on the nameplate, supply
power voltage, phase and amperage. Consult ANSI/
NFPA 70 and CSA C22.1 for proper conductor sizing.
Provide the Opening(s) for the Electrical
Connections
Electrical openings vary by unit size and arrangement
and are eld-supplied.
Connect the Power Supplies
Connect the main power lines and electric heater power
lines to the disconnect switches or terminal blocks and main
grounding lug(s). Torque eld connections to manufacturer’s
recommendations.
Wire the Optional Convenience Outlet
The convenience outlet requires a separate 115V power
supply circuit. The circuit must include short circuit
protection which may need to be supplied by others.
Connect Field-Wired Low Voltage
Components
Most factory-supplied electrical components are
prewired. To determine what electrical accessories
require additional eld-wiring, refer to the unit-specic
wiring diagram located on the inside of the control center
access door.
Control wires should not be run inside the same conduit
as that carrying the supply power. Make sure that eld-
supplied conduit does not interfere with access panel
operation. All low voltage wiring should be run in conduit
wherever it may be exposed to the weather.
The low voltage control circuit is 24 VAC and control
wiring should not exceed 0.75 ohms. If wire resistance
exceeds 0.75 ohms, an industrial-style, plug-in relay
should be added to the unit control center and wired in
place of the remote switch (typically between terminal
blocks R and G on the terminal strip. The relay must
be rated for at least 5 amps and have a 24 VAC coil.
Failure to comply with these guidelines may cause
motor starters to “chatter” or not pull in which can cause
contactor failures and/or motor failures.
Field-Provided Disconnect
If eld-installing an additional disconnect switch, it
is recommended that there is at least four feet of
service room between the switch and system access
panels. When providing or replacing fuses in a fusible
disconnect, use dual element time delay fuses and size
according to the rating plate.

14 Packaged and Split Rooftop Ventilator
© 2021 Mitsubishi Electric US, Inc.
PremiSys
Alternate Supply Entry Locations
Each installation is unique and as a result, alternate
entry locations may be eld-located. Before using any
alternate entry location, verify the suitability of the
location and ensure the use of an alternate location does
not interfere with unit wiring, components or functionality.
Recommended Electrical and Gas Supply
Entry Locations
Manufacturer recommends that electrical service and
gas supply be brought into the cabinet through the end
wall, as shown below. There are three penetrations into
the cabinet that are required; one for high voltage supply
wiring, one for low voltage control wiring and one for
either gas supply or high voltage supply wiring for an
electric heater.
Recommended Gas and Electric Supply Entry Locations
Optional Unit
Disconnect
Field Wiring
Indirect
Gas
Supply
Location
Optional Gas Piping
Units with indirect gas-red furnaces require eld-
supplied and installed gas supply piping.
Typical Gas Supply Piping Connection
Ground
Joint
Union
8 in. Trap
Gas to
Controls
From Gas Supply
Bleeder Valve or
1/8 in Plugged Tap
Gas Cock
Gas Connections
If this unit is equipped with an indirect gas-red furnace,
connection to an appropriate gas supply line will be
required. For complete information on installation
procedures for the optional gas furnace, refer the PVF/
PVG Indirect Gas-Fired Heat Module Installation,
Operation, and Maintenance Manual.
WARNING
Never drill holes in the roof of the unit! There is high
voltage wiring located between the inner and outer
roof panels. Damage to the wiring could cause severe
bodily harm or death.
NOTE
Housing size 5-1 gas furnaces are designed for gas
pressure of 5-13.5 in. wg for natural gas (6-inch
minimum on single 500 and 600 MBH furnaces) and
11-13.5 in. wg for LP. If the gas pressure at the job
location is greater than 13.5 in. wg, an additional
regulator is required to reduce pressure. For other
models, reference the Model PVF and PVG IOM.
Housing
Size
Total Heating
Capacity
(Input in MBH)
Gas
Connection
Size
Max Gas
Pressure
0-1
75
¾” NPT 14 in. wg.
100
150
200
1-1
100
¾” NPT 14 in. wg.
150
200
250
300
2-1
300
¾” NPT 14 in. wg.400
500
4-1
600 ¾” NPT
14 in. wg.
800
100 1” NPT
1200
5-1
600 1” NPT
13.5 in. wg.
800
2” NPT1000
1200

15
Packaged and Split Rooftop Ventilator
© 2021 Mitsubishi Electric US, Inc.
PremiSys
Condensate Drain Trap
This unit is equipped with a stainless steel condensate
pan with a stainless steel connection. It is important that
the drain connection be tted with a “P” trap to ensure
proper drainage of condensate while maintaining internal
static pressures and to prevent migration of sewer gas
back into the unit.
A “P” trap assembly (kit) is
supplied with each unit, except
for housing 5-1, and
is to be assembled and
installed as local conditions
require and according to the
assembly instructions
provided with the “P” trap.
If local and area codes permit,
the condensate may be drained
back onto the roof, but a drip pad should be provided
beneath the outlet. If local and area codes require
a permanent drain line, it should be fabricated and
installed in accordance with Best Practices and all
codes.
In some climates, it will be necessary to provide freeze
protection for the “P” trap and drain line. The “P” trap
should be kept lled with water or glycol solution at all
times and it should be protected from freezing to protect
the “P” trap from damage. If severe weather conditions
occur, it may be necessary to fabricate a “P” trap and
drain line of metal and install a heat tape to prevent
freezing.
Condensate Overow Switch
This unit is equipped with an optional factory-mounted
condensate overflow switch. In the event that a high
level of condensate is detected, the microprocessor
controller will trigger an alarm and shutdown the unit.
Optional Coil Piping
Factory-installed cooling components are mounted in the
coil section of the unit. The coil section is downstream of
the energy wheel on the supply air side of the unit.
Optional hot water coil is located downstream of the
supply fan on all models. Water piping can be routed
through the base of this unit if desired.
Piping vestibule is available for all models.
Water Coils
1. Piping should be in accordance with accepted
industry standards. Pipework should be supported
independently of the coils. When installing couplings,
do not apply undue stress to the connection
extending through the unit. Use a backup pipe
wrench to avoid breaking the weld between coil
connection and header.
2. Connect the water supply to the bottom connection
on the air leaving side and the water return to the
top connection on the air entering side. Connecting
the supply and/or return in any other manner will
result in very poor performance. Be sure to replace
factory-installed grommets around coil connections
if removed for piping. Failure to replace grommets
will result in water leakage into the unit and altered
performance.
3. Water coils are not normally recommended for
use with entering air temperatures below 40°F. No
control system can be depended on to be 100% safe
against freeze-up with water coils. Glycol solutions
or brines are the only safe media for operation of
water coils with low entering air conditions. If glycol
or brine solutions are not used, coils must be drained
when freezing conditions are expected. If required,
vent and drain connections must be field-piped,
external to the unit.
4. Pipe sizes for the system must be selected on the
basis of the head (pressure) available from the
circulation pump. The velocity should not exceed
6 feet per second and the friction loss should be
approximately 3 feet of water column per 100 feet
of pipe.
Water Coil Piping Installation

16 Packaged and Split Rooftop Ventilator
© 2021 Mitsubishi Electric US, Inc.
PremiSys
R410A Piping Design
1- Pipe
Refrigerant pipe for CITY MULTI® shall be made of
phosphorus deoxidized copper, and has two types.
• Type-O: Soft copper pipe (annealed copper pipe),
can be easily bent with human’s hands.
• Type-1⁄2H pipe: Hard copper pipe (straight pipe),
being stronger than Type-O pipe of the same radial
thickness.
The maximum operation pressure of R410A air
conditioner is 4.30 MPa [624psi]. The refrigerant piping
should ensure the safety under the maximum operation
pressure. Follow the recommended pipe size in the table
below or you shall follow the local industrial standard.
Pipes of radial thickness 0.7mm or less shall not be
used.
Copper Pipe Size and Radial Thickness for
R410A CITY MULTI®
Size (mm)
O.D.
Size
(in.)
O.D.
**Radial
Thickness
(mm)
**Radial
Thickness
(mils)
*Pipe Type
ø6.35 ø1⁄4 0.8 [32] 1 or 2
ø9.52 ø3⁄8 0.8 [32] 1 or 2
ø12.7 ø1⁄2 0.8 [32] 1 or 2
ø15.88 ø5⁄8 1.0 [40] 1 or 2
ø19.05 ø3⁄4 1.2 [48] 1 or 2
ø22.2 ø7⁄8 1.0 [40] 2
ø25.4 ø1 1.0 [40] 2
ø28.58 ø11⁄8 1.0 [40] 2
ø31.75 ø11⁄4 1.1 [44] 2
ø34.93 ø13⁄8 1.2 [48] 2
ø41.28 ø15⁄8 1.4 [56] 2
*Pipe Type:
1=ACR-Annealed
2=ACR-Drawn Temper
**The gures in the radial thickness column are based on the
Japanese standards and are provided only as a reference. Use
pipes that meet the local standards.
Split DX Piping Installation
Piping Design
Refrigerant Line Sizes
DOAS Unit Refrigerant Line Connections (in.)
MPF-1-**-**-96-1 1⁄2 liquid 11⁄8 suction1
MPF-1-**-**-144-1 1⁄2 liquid 11⁄8 suction
MPF-2-**-**-144-1 1⁄2 liquid 11⁄8 suction
MPF-2-**-**-192-1 5⁄8 liquid 13⁄8 suction2
MPF-2-**-**-240-1 5⁄8 liquid 13⁄8 suction2
1
Field supplied 11⁄8” - 7⁄8” OD coupling may be needed at
DOAS for installation.
2
Field supplied 13⁄8” - 11⁄8” OD coupling will be needed at
DOAS for installation.
Outdoor Unit Model Refrigerant Line
Connections (in.)
DOAS
Model
PUHY-P96T/YKMU 1⁄2 liquid
7⁄8
suction MPF-1
PUHY-P144T/YKMU 1⁄2 liquid 11⁄8 suction MPF-1
PUHY-P144T/YKMU 1⁄2 liquid 11⁄8 suction MPF-2
PUHY-P192T/YSKMU 5⁄8 liquid 11⁄8 suction MPF-2
PUHY-P240T/YSKMU 5⁄8 liquid 11⁄8 suction MPF-2
PUHY-EP96T/YNU 1⁄2 liquid
7⁄8
suction MPF-1
PUHY-EP144T/YNU 1⁄2 liquid 11⁄8 suction MPF-1
PUHY-EP144T/YNU 1⁄2 liquid 11⁄8 suction MPF-2
PUHY-EP192T/Y(S)NU
(twinned model) 5⁄8 liquid 11⁄8 suction MPF-2
PUHY-EP240T/Y(S)NU
(twinned model) 5⁄8 liquid 11⁄8 suction MPF-2
TUHYE096(3/4)
AN40A(N/B) 1⁄2 liquid
7⁄8
suction MPF-1
TUHYE144(3/4)
AN40A(N/B) 1⁄2 liquid 11⁄8 suction MPF-1
TUHYE192(3/4)
BN40A(N/B)
(twinned model)
5⁄8 liquid 11⁄8 suction MPF-2
TUHYE240(3/4)
BN40A(N/B)
(twinned model)
5⁄8 liquid 11⁄8 suction MPF-2

17
Packaged and Split Rooftop Ventilator
© 2021 Mitsubishi Electric US, Inc.
PremiSys
Piping Length
Item
Piping
in the
figure
Max.
length
(m[ft])
Max. equiv.
length (m[ft])
Max. piping length A 15 [50] *1 15 [50] *1
Height between OU and
DOAS
(OU above DOAS)
H 15 [50] -
Height between OU and
DOAS
(OU under DOAS)
H115 [50] -
OU: Outdoor Unit, DOAS: Dedicated Outdoor Air Unit
*1 For distances beyond 50 ft, contact your Mitsubishi distributor
Bend Equivalent Length “M”
Outdoor Unit M (m/bends [ft./bends])
PUHY-P96T/YKMU 0.42 [1.38]
PUHY-P144T/YKMU 0.50 [1.64]
PUHY-EP96T/YNU 0.42 [1.38]
PUHY-EP144T/YNU 0.50 [1.64]
TUHYE096(3/4)AN40A(N/B) 0.42 [1.38]
TUHYE144(3/4)AN40A(N/B) 0.50 [1.64]
TUHYE192(3/4)BN40A(N/B)
(twinned model) 0.42 [1.38]
TUHYE240(3/4)BN40A(N/B)
(twinned model) 0.50 [1.64]
Piping “A” Size Selection Rule
Outdoor Unit Pipe Liquid
(mm [in.])
Pipe (Gas)
(mm [in.])
PUHY-P96T/YKMU 12.7 [1⁄2] 22.2 [7⁄8]
PUHY-P144T/YKMU 12.7 [1⁄2] 28.58 [11⁄8]
PUHY-EP96T/YNU 12.7 [1⁄2] 22.2 [7⁄8]
PUHY-EP144T/YNU 12.7 [1⁄2] 28.58 [11⁄8]
TUHYE096(3/4)AN40A(N/B) 12.7 [1⁄2] 22.2 [7⁄8]
TUHYE144(3/4)AN40A(N/B) 12.7 [1⁄2] 28.58 [11⁄8]
TUHYE192(3/4)BN40A(N/B)
(twinned model) 12.7 [1⁄2] 22.2 [7⁄8]
TUHYE240(3/4)BN40A(N/B)
(twinned model) 12.7 [1⁄2] 28.58 [11⁄8]
PUHY-P96/144TKMU/YKMU Piping PUHY-P192/240TSKMU/YSKMU Piping
OU
DOAS
A
H (OU above DOAS)
H' (OU under DOAS)
OU
DOAS
H (OU above DOAS)
H' (OU under DOAS)
A
S
T
Outdoor Twinning
Kit CMY-Y100CBK3
h2
OU
Piping Length
Item
Piping
in the
figure
Max.
length
(m[ft])
Max.
equiv.
length
(m[ft])
Max. piping length A+S+T 15 [50] *1 15 [50]
*1
Height between OU and OU h2 0.1 [0.3] -
Height between OU and DOAS
(OU above DOAS) H 15 [50] -
Height between OU and DOAS
(OU under DOAS) H115 [50] -
OU: Outdoor Unit, DOAS: Dedicated Outdoor Air Unit
*1 For distances beyond 50 ft, contact your Mitsubishi distributor
Bend Equivalent Length “M”
Outdoor Unit M (m/bends [ft./bends])
PUHY-P192T/YSKMU 0.50 [1.64]
PUHY-P240T/YSKMU 0.50 [1.64]
PUHY-EP192T/Y(S)NU
(twinned model) 0.50 [1.64]
PUHY-EP240T/Y(S)NU
(twinned model) 0.50 [1.64]
TUHYE096(3/4 )AN40A(N/B) 0.50 [1.64]
TUHYE 144(3/4 )AN40A(N/B) 0.50 [1.64]
TUHYE 192(3/4 )BN40A(N/B)
(twinned model) 0.50 [1.64]
TUHYE240(3/4 )BN40A(N/B)
(twinned model) 0.50 [1.64]
Piping “A” Size Selection Rule
Outdoor Unit Pipe Liquid
(mm [in.])
Pipe (Gas)
(mm [in.])
PUHY-P192T/YSKMU 15.88 [5⁄8] 28.58 [11⁄8]
PUHY-P240T/YSKMU 15.88 [5⁄8] 28.58 [11⁄8]
PUHY-EP192T/Y(S)NU
(twinned model) 15.88 [5⁄8] 28.58 [11⁄8]
PUHY-EP240T/Y(S)NU
(twinned model) 15.88 [5⁄8] 28.58 [11⁄8]
TUHYE096(3/4)AN40A(N/B) 15.88 [5⁄8] 28.58 [11⁄8]
TUHYE144(3/4)AN40A(N/B) 15.88 [5⁄8] 28.58 [11⁄8]
TUHYE192(3/4)BN40A(N/B)
(twinned model) 15.88 [5⁄8] 28.58 [11⁄8]
TUHYE240(3/4)BN40A(N/B)
(twinned model) 15.88 [5⁄8] 28.58 [11⁄8]
For piping size “S”, ‘’T”, please refer to specication of the twinning
kit CMY-Y100CBK2 on the Outdoor units external drawing.

18 Packaged and Split Rooftop Ventilator
© 2021 Mitsubishi Electric US, Inc.
PremiSys
Split DX Refrigerant Charge Calculation
At the time of shipping, the outdoor air unit is charged with refrigerant. As this charge does not include the amount
needed for extended piping, additional charging for the refrigerant lines will be required on site. In order that future
servicing may be properly provided, always keep a record of the size and length of the refrigerant lines and the
amount of additional charge by writing it in the space provided on the condensing unit.
Calculation of the Additional Refrigerant Charge
• Calculate the amount of additional charge based on the length of the piping and the size of the refrigerant line.
• Use the table below as a guide to calculate the amount of additional charge and add this amount to the system.
• If the calculation results in a fraction of less than 0.1kg [4 oz], round up to the next 0.1kg [4 oz]. For example, if the
result of the calculation was 12.38 kg [436.4 oz], round the result to up to 12.4 kg [437 oz].
<Additional Charge>
TOTAL
additional
refrigerant
charge
=
Total length of liquid
pipe sized
15.88 [5⁄8 in.]
+
Total length of
liquid pipe sized
12.70 [1⁄2 in.]
+
Total length of liquid
pipe sized
9.52 [3⁄8 in.]
+
Additional Charge for OD Unit
+DOAS
Charge
Outdoor Unit Amount
PUHY-P96T/YKMU 2 kg [71 oz]
(kg)
(oz)
(m) x 0.20 (kg/m)
(ft.) x 2.16 [oz/ft.]
(m) x 0.12 (kg/m)
(ft.) x 1.3 [oz/ft.]
(m) x 0.06 (kg/m)
(ft.) x 0.65 [oz/ft.]
PUHY-P144T/YKMU 8 kg [283 oz]
PUHY-P192T/YSKMU 8 kg [283 oz]
PUHY-P240T/YSKMU 16 kg [566 oz]
PUHY-EP96T/YNU 0 kg [0 oz]
PUHY-EP144T/YNU 0 kg [0 oz]
PUHY-EP192T/Y(S)NU
(twinned model) 14 kg [494 oz]
PUHY-EP240T/Y(S)NU
(twinned model) 14 kg [494 oz]
TUHYE096(3/4)
AN40A(N/B) 0 kg [0 oz]
TUHYE144(3/4)
AN40A(N/B) 0 kg [0 oz]
TUHYE192(3/4)
BN40A(N/B)
(twinned model)
14 kg [494 oz]
TUHYE240(3/4)
BN40A(N/B)
(twinned model)
14 kg [494 oz]
DOAS Charge Amount
Model Number Charge Amount
MPF-1-**-**-96-1 5.5 kg 194 oz
MPF-1-**-**-144-1 5.5 kg 194 oz
MPF-2-**-**-144-1 5.6 kg 198 oz
MPF-2-**-**-192-1 18.8 kg 663 oz
MPF-2-**-**-240-1 18.8 kg 663 oz
Amount of Factory Charged Refrigerant
(reference only)
Outdoor Unit Model Liquid Line
(in.) Charge Amount
PUHY-P96T/YKMU 1⁄2 11.5 kg [406 oz]
PUHY-P144T/YKMU 1⁄2 11.8 kg [417 oz]
PUHY-P192T/YSKMU 5⁄8 20.8 kg [735 oz]
PUHY-P240T/YSKMU 5⁄8 23.6 kg [834 oz]
PUHY-EP96T/YNU 1⁄2 9.8 kg [346 oz]
PUHY-EP144T/YNU 1⁄2 10.8 kg [381 oz]
PUHY-EP192T/Y(S)
NU (twinned model)
5⁄8 19.6 kg [692 oz]
PUHY-EP240T/Y(S)
NU (twinned model)
5⁄8 19.6 kg [692 oz]
TUHYE096(3/4)
AN40A(N/B)
1⁄2 9.8 kg [346 oz]
TUHYE144(3/4)
AN40A(N/B)
1⁄2 10.8 kg [381 oz]
TUHYE192(3/4)
BN40A(N/B)
(twinned model)
5⁄8 19.6 kg [692 oz]
TUHYE240(3/4)
BN40A(N/B)
(twinned model)
5⁄8 19.6 kg [692 oz]

19
Packaged and Split Rooftop Ventilator
© 2021 Mitsubishi Electric US, Inc.
PremiSys
OU
DOAS
A
42' Total Piping Length
1/2" Liquid Line
Example: MPF-1-**-**-96 DOAS with PUHY-P96T/YKMU Outdoor Unit
TOTAL
additional
refrigerant
charge
=
Total length of liquid
pipe sized 12.70
[1⁄2in.]
+
Additional Charge for
OU Unit
+
DOAS
ChargeOutdoor Unit Amount
PUHY-P96T/YKMU 2 kg [71 oz]
(m) x 0.12 (kg/m)
(ft.) x 1.3 [oz/ft.]
PUHY-P144T/YKMU 8 kg [283 oz]
oz
PUHY-P192T/YSKMU 8 kg [283 oz]
PUHY-P240T/YSKMU 16 kg [566 oz]
TOTAL
additional
refrigerant
charge =42’ x 1.30 [oz/ft.]
55 oz + 71 oz + 179 oz
305 oz
Dimensions mm (in.)
Housing Size Coil Size A B C D
MPF-1-1 40 x 35 345 (13.57) 438 (17.23) 1377 (54.21) 1369 (53.90)
MPF-2-1 32 x 45 658 (25.91) 627 (24.68) 1636 (60.46) 1472 (57.97)
50 x 45 388 (15.28) 449 (17.66) 1455 (57.27) 1445 (56.88)
Split DX Piping Connections
MPF-1-**-**-96, 144 - MPF-2-**-**-144 MPF-2-**-**-192, 240
Suction Pipe ø28.58 (11⁄8) ø34.93 (13⁄8)
Liquid Pipe ø12.7(1⁄2) ø15.88 (5⁄8)
Measurement in mm (in.)
Liquid Line
Suction Line

20 Packaged and Split Rooftop Ventilator
© 2021 Mitsubishi Electric US, Inc.
PremiSys
Control Center Components
Main Control Center Components
Image represents a typical installation for MP-1-1 or MPE-2-1. Components and locations will vary on
MPE-4-0,-5-1, MP and MPF models.
Electrical Cabinet
1. Power distribution block; high voltage
supply is terminated here
2. Fuse holders
3. Phase monitor
4. Unit Disconnect
5. Condensing fan motor contactors
6. Wheel motor contactor
7. Compressor motor contactors
Controls Cabinet
8. Transformer
9. VFDs
10. Microprocessor controller
11. Monitoring points
12. Low voltage terminal strip
13. Relays
14. Dirty filter switches
15. Wheel pressure switch
16. Outdoor airflow monitor
17. Exhaust airflow monitor
18. Digital scroll controller
Optional Indirect Gas-Fired Furnace
Note: In some models, two furnaces are installed to provide greater output. When two furnaces are installed, they are
in parallel and both will operate at the same time and the same output. Both furnaces will have identical controls.
1. Single-stage valve
2. Modulating valve
3. PCOE expansion board
4. Ignition controller
5. Transformer
6. Combustion blower
7. Burner manifold
8. Collector box
For further information on the optional furnace and its control center, see the Indirect Gas-Fired Heat lOM shipped
with the unit.
Electrical Cabinet
Controls Cabinet
7
1
3
5
6
8
2 2
5
14
15
16
17
18
13
12
11
10
9
9
9
4
Accessible via control center door
Accessible via compressor door
2 2
5
12
4
3
6
7
8
5
12
4
3
6
7
8