Premisys MP Series, MPE Series, MP-2-1, MP-4-0, MPE-1-1 Installation, Operation And Maintenance Manual

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PremiSys

Document 479650

Premi

Sys

Models MP, MPE and MPF

Packaged and Split Rooftop Ventilator

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!

Models MP/MPE (Packaged DX) Model MPF (Split DX)

General Safety Information

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

affect 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.

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.

Packaged and Split Rooftop Ventilator

PremiSys

Table of Contents

General Safety Information ....................1

Receiving, Handling, Storage ...................3

Product Overview

Cooling ....................................4

Heating ....................................4

Airflow Arrangement ..........................4

Safety Listing ...............................4

Supplemental IOM Manuals ....................4

Models and Capacities ........................4

Subassemblies

Blower ....................................5

Coils ......................................5

Compressors ...............................5

Dampers ...................................5

Electric Heater ..............................5

Filters .....................................5

Indirect Gas-Fired Furnace ....................5

Packaged DX System ........................5

Split DX System .............................5

Installation

Packaged DX Weights, Dimensions, Clearance ....6

Split DX Weights, Dimensions, Clearance .........7

Additional Clearances for Packaged DX ..........8

Handling Concerns for Units with Package DX .....8

Lifting .....................................8

Installation Site Requirements ..................8

Roof Curb Mounting ..........................9

Ductwork Configurations ......................9

Rail Mounting and Layout .....................9

Electrical Information

Determine the Size of Main Power Lines ........10

Determine the Size of Electric Heater Wiring .....10

Opening(s) for the Electrical Connections ........10

Connect the Power Supplies ..................10

Wire the Optional Convenience Outlet ..........10

Connect Field-Wired Low Voltage Components ...10

Field-Provided Disconnect ....................10

Electrical/Gas Supply Entry Locations ...........11

Alternate Supply Entry Locations ...............11

Indirect-Gas Piping Installation

Optional Gas Piping .........................11

Water Coil Piping Installation

Optional Coil Piping .........................12

Water Coils ................................12

Condensate Drain Trap ......................12

Split DX Piping Installation

R410 PIping Material ........................13

Piping Design ...........................13-14

Refrigerant Charge Calculation ................15

Piping Connections .........................16

Control Center Components

Main Control Center .........................17

Optional Indirect Gas-Fired Furnace ............17

Component Operation

Phase Monitor .............................17

Variable Frequency Drive .....................17

Supply Fan VFD Sequence ...................17

Exhaust Fan Only Power .....................18

Airflow Monitoring ..........................18

Packaged and Split Rooftop Ventilator

Factory-Installed Refrigeration Systems

Packaged DX ..............................19

Split DX ..................................20

Electrical Parts Specification ................21

Component Operation ......................21

Start-Up – Unit

Model and Serial Number ....................22

Pre-Start-Up Checklist .......................23

Special Tools Required ......................23

Start-Up Procedure .........................23

Voltage Imbalance ..........................23

Start-Up Checklist ..........................23

Start-Up – Components

Fan ......................................25

Supply Fan (Plenum Type) ...................25

Fan Wheel Rotation Direction .................25

Supply/Exhaust Fan .........................25

Vibration ..................................25

Discharge Air Temperature Sensor .............25

Airflow Monitor .............................26

Optional Energy Wheel

Start-Up ..................................27

Drive Belt .................................27

Adjust the Air Seals .........................27

Sequence of Operation ......................27

Maintenance ...............................28

Inspection .................................28

Wheel Disassembly .........................28

Cleaning ..................................28

Reassembly ...............................28

Energy Recovery Wheel Belt ..................28

Energy Recovery Wheel Bearings ..............28

Energy Recovery Wheel - Troubleshooting .......29

Troubleshooting

Alarms

Microprocessor Controller ..................29

Phase Monitor ............................29

Variable Frequency Drive ...................29

Optional FX05 Furnace Controller ............29

Optional Digital Scroll Compressor Controller ...29

Unit ......................................30

Refrigeration Circuit

Packaged ............................31-34

Split .................................35-37

Routine Maintenance

Monthly ...................................38

Semiannually ..............................38

Annually ..................................38

Units with Packaged DX, Semiannually ..........38

Maintenance Procedures

Lubrication ................................39

Dampers ..................................39

Gas Furnace ..............................39

Fan Motors ................................39

Fan Wheel and Fasteners ....................39

Internal Filter Maintenance ...................39

External Filter Maintenance ...................39

Coil Maintenance ...........................39

Maintenance Log ..................... Backcover

Receiving

PremiSys

This product may have been subject to road salt during transit. If so, immediately wash off 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 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.

The unit should be stored at least 3½ in. (89 mm) off

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 suf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 off.

Do not cover parts with plastic lm or tarps as these

cause condensation of moisture from the air passing through heating and cooling cycles.

Handling

Units are to be rigged and moved by the lifting brackets provided or by the skid when a forklift is used. 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.

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.

Packaged and Split Rooftop Ventilator

Product Overview

PremiSys

A horizontally congured Dedicated 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 Units with packaged DX are shipped fully charged with

refrigerant and are ready for operation upon arrival.

Heating

There are three different 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ow Arrangement

The unit is capable of Constant Air Volume (CAV), Variable Air Volume (VAV), 100% Outdoor Air.

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

Safety Listing

Models are listed per ANSI/UL 1995, Heating and

Cooling Equipment and are ETL Certied.

Models and Capacities

Model Cooling Capacity

Packaged DX

MP-1-1/MPE-1-1 5 to 15 tons

MP-2-1/MPE-2-1 15 to 30 tons

MP-4-0/MPE-4-0 20 to 45 tons

Split DX

MPF-1-1 5 to 12 tons

MPF-2-1 10 to 20 tons

Packaged and Split Rooftop Ventilator

Subassemblies

PremiSys

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 (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 the compressors may be a digital scroll type compressor. Optional inverter scroll compressors on Split DX system only.

Dampers

Motorized intake air damper.

Electric Heater

An SCR controlled electric heater (not shown) is available on the units. It requires a separate power

supply and has its own control panel. See unit-specic

wiring diagram.

Filters

Two-inch thick metal mesh lters in the optional Outdoor

Weatherhood air intake, 2-inch thick pleated paper

MERV 8 (standard) or MERV 13 (optional) lters in the airstream. Optional 4-inch thick lter bank with 2-inch

thick MERV 8 and 2-inch thick MERV 13 pleated paper Final Filters.

Indirect Gas-Fired Furnace

The optional model PVG furnace is available on housing sizes 1 and 2. Housing size 4 uses the optional model PVF furnace.

Packaged DX System

Unit may be ordered with a packaged DX system. It will include either one or two 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.

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.

Final Filters

(on coil face)

Main Control

Center

Intake Air

Damper

Plenum-Type

Supply Air Blower

Indirect Gas-Fired Furnace

(optional)

Energy Wheel (MPF)

Weatherhood Filters

(metal mesh)

Plenum-Type

Exhaust Air Blower

Coils

Open view of Model MPF showing split DX cooling, fans and energy recovery wheel.

Packaged and Split Rooftop Ventilator

Installation - Packaged DX

PremiSys

Typical Unit Weights and Dimensions

RA4

RA2

RA1

RETURN AIR INLET

A L W J* H

Unit Size

Outdoor

Air WHLength Width

MP-1-1 22.1 98.6 52.5 30.1 59.3 2700 20x20x2 4

SUPPLY FILTERS

DX COIL

SB4 SB3RA3

CONTROL

Condensing

Section

CENTER

SB2

SB1

SUPPLY AIR DISCHARGE BOTTOM

Height

OUTDOOR AIR

WEATHERHOOD

Unit

Weight

RECIRC

DAMPER

Outdoor

Air WH

OUTDOOR AIR DAMPER

SUPPLY AIR

DISCHARGE SIDE

Pre-Wheel

Qty

IG HEATER

Supply/

Exhaust

Filters*

Qty

SUPPLY BLOWER

SS1

SS2

SS3SS4

Supply Final

Filters

(Pre-coil)**

COMPRESSORS

Qty

20x20x2 4

MP-2-1 27.1 109 68.2 30.1 72.5 4500 25x25x2 4 16x25x2 8

MP-4-0 22 156 68 30 90 6400 20x25x2 6 16x20x2 12

MP-4-0

22 156 68 30 90 6400 20x25x2 6 16x20x2 12

MPE-1-1 22.1 149.5 52.5 30.1 59.3 3400 20x20x2 4 20x25x2† 2 MPE-2-1 27.1 163.2 68.2 30.1 72.5 5100 25x25x2 4 16x25x2‡ 4 MPE-4-0 22 224 68 30 90 8300 20x25x2 6 16x20x2# 7

MPE-4-0

27 224 68 30 90 8300 25x25x2 6

20x20x2/

20x24x2

† ‡ #

8 16x20x2 12

20x20x2 4 16x25x2 8 16x20x2 12

All dimensions are shown in inches. Weight shown in pounds. *Size and quantity is per airstream. **Dimension based upon

MERV 8 or 13 lters (MERV 14 lters are 4 in. thick).†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). #Based upon a 52 / 58 in. energy wheel (16x20x2, quantity of 8 for 74 in. energy wheel). ^Above 12,000 cfm. WH = weatherhood (aluminum mesh). Model MPE includes energy wheel (not shown).

Inlet/Discharge Locations

Unit Size RA1 RA2 RA3 RA4 SB1 SB2 SB3 SB4 SS1 SS2 SS3 SS4 MP-1-1, MPE-1-1 41 5.8 5.6, 56.6 11.5 28 14 22 24 21 6.5 22 25 MP-2-1, MPE-2-1 56 6.1 5.9, 60.2 16 53 7.6 23.2 27 21 6.5 22.2 29 MP-4-0, MPE-4-0 48.8 9.6 9, 77 21.8 42 13 37.7 36 32 6.4 45.2 32

Service Clearances

CC End

CLEARANCE

Unit Size ACS

End

CS from

MP-1-1/MPE-1-1 40 42 42 18

MP-2-1/MPE-2-1 36 58 42 18

MP-4-0/MPE-4-0 36 52 58 18

All dimensions are shown in inches.

ACS = Access CC = Control Center OA = Outdoor Air Weatherhood

CS = condensing section

Packaged and Split Rooftop Ventilator

Unit

ACS

CLEARANCE

OA End

Installation - Split DX

SS2

PremiSys

Typical Unit Weights and Dimensions

SUPPLY FINAL FILTERS

SUPPLY FILTERS

RA3

RA2

RA4

SB4

SB3

CONTROL

CENTER

SB2

OUTDOOR AIR

WEATHERHOOD

OUTDOOR AIR DAMPER

SUPPLY BLOWER

SB1

Unit

Weight

EXHAUST AIR

DISCHARGE

Outdoor

Air WH

Qty

INDIRECT GAS HEATER

Pre-

Wheel

Supply/

Exhaust

Filters*

20x25x2

SUPPLY AIR

DISCHARGE SIDE

Qty

†

‡

SS3SS4

Supply

Final

Filters

(Pre-coil)

20x20x2 4

16x25x2 8

EXHAUST BLOWER

EXHAUST DISCHARGE

WEATHERHOOD

RA1

ENERGY WHEEL

DX COIL

RETURN AIR INLET

EXHAUST FILTERS

HGRH COIL

SUPPLY AIR DISCHARGE BOTTOM

A L W H

Unit Size

Outdoor

Air WHLength Width Height

MPF-1-1 22.1 149.5 52.5 59.3 2400 20x20x2

MPF-2-1 27.1 163.2 68.2 72.5 5100 25x25x2 16x25x2

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).

Inlet/Discharge Locations

Unit Size R1 R2 R3 R4 SB1 SB2 SB3 SB4 SS1 SS2 SS3 SS4

MPF-1-1 41 5.8 5.6 11.5 28 14 22 24 21 6.5 22 25 MPF-2-1 56 6.1 5.9 16 53 7.6 23.2 27 21 6.5 22.2 29

SS1

Qty

Service Clearances

Unit Size 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

CLEARANCE

OA End

ACS

CC End

CLEARANCE

ACS = Access CC = Control Center PA = Piping Access OA = Outdoor Air Weatherhood

Packaged and Split Rooftop Ventilator

Additional Clearances for

PremiSys

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.

Minimum 48 inches clearance

Condenser Fans

Minimum 18 inches

clearance

Lifting

1. Before lifting, be sure 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. Always test-lift the unit to check for proper balance and rigging before hoisting to desired location.

Use spreader bars to prevent damage to cabinet.

Condenser Coil

End view of roof top unit with Packaged DX

Handling Concerns for Units with Packaged DX

Units having packaged DX have a system that is pressurized with refrigerant and if it is damaged, 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 - 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.

6. Never lift unit by weatherhood.

7. Never lift units in windy conditions.

8. Preparation of curb and roof openings should be completed prior to lifting unit to the roof.

9. 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.

10. Do not use fork lifts for handling unit.

Packaged and Split Rooftop Ventilator

Roof Curb Mounting

PremiSys

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 eld

assembly (by others). 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.

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

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.

Typical Unit with Condensing Section and

Factory-Supplied Curb Kit

Typical Unit Installed on Rails Supplied by Others

Packaged and Split Rooftop Ventilator

PremiSys

Electrical Information

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 off the power supply, turn off 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.

Packaged and Split Rooftop Ventilator

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.

Recommended Electrical and Gas Supply

PremiSys

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.

Disconnect Switch for electric heater. Present only if electric heat is selected. Terminate heater supply wiring here.

Optional Main Disconnect Switch (Terminate high voltage supply wiring here or at power distribution block).

RECOMMENDED LOCATION

for low voltage control wiring.

Indirect-Gas Piping Installation

Optional Gas Piping

Units with indirect gas-red furnaces require eld-

supplied and installed gas supply piping. The unit gas connection is 3⁄4 inch NPT. The maximum allowable gas pressure is 14 in. wg.

From Gas Supply

Gas Cock

Bleeder Valve or 1/8 in Plugged Tap

Ground

Joint

Union

8 in. Trap

Gas to

Controls

RECOMMENDED LOCATION:

Factory-provided opening for gas supply. If electric heat is ordered, use this location for high voltage supply wiring for heater.

RECOMMENDED LOCATION

for ﬁeld-supplied high voltage supply wiring.

Recommended Gas and Electric Supply Entry Locations

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.

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.

Typical Gas Supply Piping Connection

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.

Packaged and Split Rooftop Ventilator

Water Coil Piping Installation

PremiSys

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.

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 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.

Packaged and Split Rooftop Ventilator

Split DX Piping Installation

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 radical 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.

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 provided only as a reference. Use pipes the meet the local standards.

Size

(in.)

O.D.

**Radial

Thickness

(mm)

**Radial

Thickness

(in.)

*Pipe

Type

Piping Design

Refrigerant Line Sizes

DOAS Unit Refrigerant Line Connections

(in.)

MPF-1-**-**-96-11⁄2 liquid 11⁄8 suction

MPF-1-**-**-144-11⁄2 liquid 11⁄8 suction

MPF-2-**-**-144-11⁄2 liquid 11⁄8 suction

MPF-2-**-**-192-15⁄8 liquid 13⁄8 suction

MPF-2-**-**-240-15⁄8 liquid 13⁄8”suction

Field supplied 11⁄8” - 7⁄8” OD coupling may be needed at DOAS for installation.

Field supplied 13⁄8” - 11⁄8” OD coupling will be needed at DOAS for installation.

Outdoor Unit

Model

PUHY-P96T/ YKMU

PUHY-P144T/ YKMU

PUHY-P192T/ YSKMU

PUHY-P240T/ YSKMU

Refrigerant Line

Connections (in.)

⁄2 liquid

⁄8 liquid

⁄8 suction MPF-1

11⁄8 suction

DOAS Model

MPF-1

MPF-2

Packaged and Split Rooftop Ventilator

PUHY-P96/144TKMU/YKMU Piping

DOAS

PremiSys

PUHY-P192/240TSKMU/YSKMU Piping

DOAS

H (OU above DOAS)

H' (OU under DOAS)

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

15 [50] -

above DOAS)

Height between OU and DOAS (OU

15 [50] -

under DOAS)

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]

Piping “A” Size Selection Rule

Outdoor Unit Pipe (Liquid)

(mm [in.])

PUHY-P96T/ YKMU

PUHY-P144T/ YKMU

12.7 [1⁄2] 22.2 [7⁄8]

12.7 [1⁄2]

Pipe (Gas)

(mm [in.])

28.58 [11⁄8]

Outdoor Twinning Kit CMY-Y100CBK3

H' (OU under DOAS)

H (OU above DOAS)

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

Height between OU and DOAS (OU above DOAS)

Height between OU and DOAS (OU under DOAS)

OU: Outdoor Unit, DOAS: Dedicated Outdoor Air Unit *1 For distances beyond 50 ft, contact your Mitsubishi distributor

0.1 [0.3] -

15 [50] -

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]

Piping “A” Size Selection Rule

Outdoor Unit Pipe (Liquid)

(mm [in.])

PUHY-P192T/ YSKMU

PUHY-P240T/ YSKMU

For piping size “S”, “T”, please refer to specification of the twinning kit CMY-Y100CBK2 on the Outdoor units external drawing.

15.88 [

⁄8] 28.58 [11⁄8]

⁄8]

Pipe (Gas)

(mm [in.])

28.58 [11⁄8]

Packaged and Split Rooftop Ventilator

Split DX Refrigerant Charge Calculation

DOAS

PremiSys

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

• Calcuate 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].

TOTAL

additional

refrigerant

charge

(kg)

(oz)

Total length of liquid

pipe sized 15.88

[5⁄8 in.]

(m) x 0.20 (kg/m)

(ft.) x 2.16 [oz/ft.]

Total length of liquid

pipe sized 12.70

[1⁄2 in.]

(m) x 0.12 (kg/m)

(ft.) x 1.3 [oz/ft.]

Total length of liquid

pipe sized 9.52

[3⁄8 in.]

(m) x 0.06 (kg/m)

(ft.) x 0.65 [oz/ft.]

Additional Charge for OD Unit

Outdoor Unit Amount

PUHY-P96 2 kg [71 oz]

PUHY-P144 8 kg [283 oz]

PUHY-P192 8 kg [283 oz]

PUHY-P240 16 kg [566 oz]

DOAS

Charge

DOAS Charge Amount

Amount of Factory Charged Refrigerant

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

Outdoor Unit

Model

PUHY-P96

PUHY-P144

PUHY-P192

PUHY-P240

Example: MPF-1-**-**-96 DOAS with PUHY-P96 Outdoor Unit

42' Total Piping Length

1/2" Liquid Line

Additional Charge for

OU Unit

DOAS

ChargeOutdoor Unit Amount

TOTAL

additional

refrigerant

charge

Total length of liquid

pipe sized 12.70

[1⁄2 in.]

(m) x 0.12 (kg/m)

(ft.) x 1.3 [oz/ft.]

PUHY-P96 2 kg [71 oz]

PUHY-P144 8 kg [283 oz]

PUHY-P192 8 kg [283 oz]

PUHY-P240 16 kg [566 oz]

(reference only)

Liquid

Charge Amount

Line (in.)

⁄2 11.5 kg [406 oz]

⁄2 11.8 kg [417 oz]

⁄8 20.8 kg [735 oz]

⁄8 23.6 kg [834 oz]

TOTAL

additional

refrigerant

charge

305 oz

42’ x 1.30 [oz/ft.]

55 oz

+ 71 oz + 179 oz

Packaged and Split Rooftop Ventilator

Split DX Piping Connections

PremiSys

Liquid Line

Suction Line

Dimensions mm (in.)

Housing Size Coil Size A B C D

MPF-1-1

MPF-2-1

40 x 35 345 (13.57) 438 (17.23) 1377 (54.21) 1369 (53.90)

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)

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.)

Packaged and Split Rooftop Ventilator

Control Center Components

PremiSys

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, MP and MPF models.

High Voltage Side

1. Power distribution block; high voltage

supply is terminated here

2. Fuse holders

3. Phase monitor

4. VFDs

5. Compressor motor contactors

6. Condensing fan motor contactors

7. Wheel motor contactor

8. Transformer

9. Unit Disconnect

Low Voltage Side

10. Microprocessor controller

11. Monitoring points

12. Low voltage terminal strip

13. Relays

14. Dirty lter switch

15. Wheel pressure switch

16. Outdoor airow monitor

17. Exhaust airow monitor

18. Digital scroll controller

LOW VOLTAGE SIDE

Accessible via compressor door

HIGH VOLTAGE SIDE

Accessible via control center door

6 7

5 6

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.

Packaged and Split Rooftop Ventilator

Component Operation

PremiSys

Phase Monitor

The unit control circuitry includes a phase monitor that constantly checks for phase reversal, phase imbalance, loss of phase or a power brownout. It requires 24 VAC to operate and when it detects a fault, it cuts off the 24 VAC that goes to the low voltage terminal strip, thereby shutting off all motors.

Variable Frequency Drive (VFD)

If a VFD was provided and installed at the factory, it has been pre-set to control the speed of the blower motor for optimum performance. The motor speed needs to

be veried during test and

balance of the unit.

If the system was congured

for Constant Air Volume (CAV), the VFD will operate in an ON / OFF fashion and the speed of the motor will not change. If the system

was congured for Variable

Air Volume (VAV), the microprocessor controller will constantly monitor operating conditions and provide a signal to the VFD, changing the VFD output as needed.

The VFD may alternatively be connected to an external signal such as provided by a BMS and be operated by a 2 - 10 VDC or a 4-20 mA input.

Supply Fan VFD Sequence

Optional Room CO2 Sensor: The microprocessor

controller will modulate the supply fan based on a comparison of the CO2 setpoint to the actual CO2 levels reported from the sensor. Mechanical high static protection cutoffs must be installed by others to protect the system and equipment from over-pressurization.

Typical Phase Monitor

Typical Variable

Frequency Drive (VFD)

Optional Exhaust Fan Only Power

The exhaust fan will have a dedicated power circuit where in the case of a power outage, the exhaust fan will still run. A phase monitor will detect an outage or power loss and open the contact, disconnecting all power to the unit and controller. An external signal will need to be sent to a relay to power the exhaust fan, enabling the fan to run at a maximum speed. This sequence is NOT to be used for high temperature exhaust applications.

Airow Monitor

A factory-wired, mounted, and powered airow

monitoring system is provided in the outdoor and/or

exhaust air streams. The airow control system offers

the following functionality:

• Display of outdoor and/or exhaust airow rate in actual

cubic feet per minute (CFM) or actual liters per second (LPS) on a 16 character LCD display.

• Two congurable analog outputs for transmitting outdoor and/or exhaust airow rate, outdoor air

temperature, or a proportional-integral-derivative (PID)

control signal based on an outdoor airow set point.

• A congurable digital output that operates based on an airow set point or range.

Operation

Outdoor and/or exhaust airow monitoring is

accomplished using two thermal dispersion sensors

that accurately measure airow velocity down to zero feet per minute (fpm). The airow controller takes the average measurement for two sensor congurations, and determines the outdoor airow rate based on the

effective intake area. Field calibration of the outdoor

airow monitoring device determines the effective intake

area of the unit. Refer to GreenTrol® Automation Inc. GF-2200A and

GF-N2211technical data sheet for further detail.

Important

For the airflow monitoring device to perform as intended, field calibration is required. Calibration of the airflow monitoring device requires an independent measurement of airflow and should be performed when the system undergoes test and balance.

Packaged and Split Rooftop Ventilator

Factory-Installed Refrigeration System Components

Hot Gas Reheat Coil

PremiSys

Packaged DX Cooling with Three Way Hot Gas Reheat and Hot Gas Bypass MP, MPE

LLF

REC

SCC

Condensing Coil

109 1211

Supply Airﬂow

FCS

HCV

1. Compressor

2. High Limit Pressure Switch

The switch opens when refrigerant pressure increases above the set point in the discharge line. A manual reset is then required.

3. Hot Gas Reheat Valve (optional)

Units equipped with a reheat coil use a threeway valve with actuator to control the supply air discharge temperature of the unit during

dehumidication mode. The unit controller provides

a 0-10 VDC signal to control the amount of reheat to meet the supply temperature set point

4. Hot Gas Reheat Coil (Optional)

5. Hot Gas Reheat Check Valve (Optional)

6. Condenser Fans

7. Condensing Coil

8. Liquid Receiver (Optional)

9. Liquid Line Filter Drier

10. Sight Glass

11. Fan Cycle Switch(es)

The switch(es) open or close based on liquid refrigerant pressure to control the condensing fans to maintain liquid pressure.

12. Thermostatic Expansion Valve (TXV)

Each unit is equipped with a TXV on each

refrigerant circuit. The valve controls the ow of

liquid refrigerant entering the evaporator coil by maintaining a constant, factory-set superheat of 10°F. The valve is adjustable and is located on the

Condenser Airﬂow

4 13

TXV

HRV

HPS

Evaporator Coil

LPS

Compressor

HGB

side of the evaporator coil and can be accessed through the coil access panel.

13. Evaporative Coil

14. Low Limit Pressure Switch

The switch is installed on the suction line and disables the DX system when the suction pressure drops below the set point. The switch will auto reset when the pressure rises above the auto-reset set point.

15. Service Access Ports

16. Hot Gas Bypass Manual Shut Off Valve (Optional)

Used to disable hot gas bypass for service and troubleshooting procedures.

17. Hot Gas Bypass Valve (Optional)

On units equipped with hot gas bypass, hot gas from the compressor is injected into the liquid line of the evaporator coil after the TXV.

Valve Adjustment - To adjust the valve, connect

a pressure gauge to the suction line and block the entering air to the evaporator coil. The valve should begin to open when the suction pressure drops to approximately 115 PSIG for R-410A (the valve will feel warm to the touch). Adjustments are made by

rst removing the cap on the bottom of the valve

and then turning the adjusting stem clockwise to increase the setting pressure (counterclockwise to decrease). Allow several minutes between adjustments for the system to stabilize. When adjustment is complete, replace the cap on the valve.

Packaged and Split Rooftop Ventilator

Factory- Installed Refrigeration System Components Cont.

PremiSys

Split DX

MPF-1-**-**-96, 144 MPF-2-**-**-144-1

MPF-2-**-**-192, 240-1

LIQUID PIPE

1. Evaporative Coil

2. Gas Pipe Thermistor

3. Liquid Pipe Thermistor

4a. Linear Expansion Valve

4b. Linear Expansion Valve

5. Strainer

GAS PIPE

LIQUID PIPE

GAS PIPE

6. Solenoid Valve

7. Solenoid Valve

8. Reheat Coil

9. Strainer

10. Reheat Pipe Thermistor

Packaged and Split Rooftop Ventilator

Split DX Electrical Parts Specication-Refrigeration Control

PremiSys

Parts Name Symbol

Model

MPF-1-**-**-96, 144, MPF-2-**-**-144, 192, 240

Liquid Pipe Thermistor TH22

Gas Pipe Thermistor TH23

Reheat Pipe Thermistor TH25

Resistance 0ºC [32ºF]/15kΩ, 10ºC [50ºF]/9.7kΩ, 20ºC [68ºF]/6.4kΩ, 25ºC

[77ºF]/5.3kΩ, 30ºC [86ºF]/4.3kΩ, 40ºC [104ºF]/3.1kΩ

Resistance 0ºC [32ºF]/15kΩ, 10ºC [50ºF]/9.7kΩ, 20ºC [68ºF]/6.4kΩ, 25ºC

[77ºF]/5.3kΩ, 30ºC [86ºF]/4.3kΩ, 40ºC [104ºF]/3.1kΩ

Resistance 0ºC [32ºF]/15kΩ, 10ºC [50ºF]/9.7kΩ, 20ºC [68ºF]/6.4kΩ, 25ºC

[77ºF]/5.3kΩ, 30ºC [86ºF]/4.3kΩ, 40ºC [104ºF]/3.1kΩ

Fuse (indoor controller board) FUSE 250V 6.3V

Solenoid Valve Coil SV10

Solenoid Valve Coil SV11

Linear Expansion Valve LEV3a

Linear Expansion Valve LEV3b

208-230V Coil (208V 7W, 230V 8.5W) Normally closed port dimension

ø7.8

208-230V Coil (208V 7W, 230V 8.5W) Normally closed port dimension

ø7.8

DC 12V Stepping motor drive port dimension ø6.4, 0~1400 pulse <at R410A

outdoor unit>

DC 12V Stepping motor drive port dimension ø6.4, 0~1400 pulse <at R410A

outdoor unit>

M-Net Terminal Block TB5 (M1, M2, S) 250V 20A

MODBUS Terminal Block TB485 (+, -, G) 250V 20A

Split DX Component Operation

Function of the LED’s on the Control Board

Symbol LED Operation Under Normal Conditions

LED 1 When M-NET power is applied LED ON

LED 2 M-NET communication signal LED ON

DOAS Mode

Component

SV10 Solenoid Valve

SV11 Solenoid Valve

Cooling Reheat Dehumidifying Fan Only Heating Off

Open Closed Open Open Open Open

Closed Open Closed Closed Closed Closed

LEV3a Linear Expansion Valve

LEV3b Linear Expansion Valve

Position will be determined by capacity requirements.

Modulating

Pulse = 41 Pulse = 41 Pulse = 41

Packaged and Split Rooftop Ventilator

Start-Up Unit - Packaged DX

PremiSys

DANGER

Electric shock hazard. Can cause injury or death. Before attempting to perform any service or maintenance, turn the electrical power to unit to OFF at disconnect switch(es). Unit may have multiple power supplies.

CAUTION

Use caution when removing access panels or other unit components, especially while standing on a ladder or other potentially unsteady base. Access panels and unit components can be heavy and serious injury may occur.

CAUTION

Do not operate without the filters and birdscreens installed. They prevent the entry of foreign objects such as leaves, birds, etc.

CAUTION

Do not run unit during construction phase. Damage to internal components may result and void warranty.

WARNING

Prior to starting up the unit, power must be energized for 24 hours without a call for cool to allow the compressor crankcase heaters time to boil off any liquid refrigerant present in the compressor.

Every installation requires a comprehensive start-up to ensure proper operation of the unit. As part of that process, the following checklist must be completed and information recorded. Starting up the unit in accordance with this checklist will not only ensure proper operation, but will also provide valuable information to personnel performing future maintenance. Should an issue arise which requires factory assistance, this completed document will allow unit experts to provide quicker

resolve. Qualied personnel should perform start-up to

ensure safe and proper practices are followed.

Unit Model No. ________________________________

Unit Serial No. ________________________________

Energy Wheel Date Code ________________________

Compressor 1 Model No. ________________________

• Unit was factory tested. All blowers, fans, and compressors are set-up to run correctly when supplied power. If any one fan is running backwards or the compressor is making loud noises, immediately turn off the power. Switch two leads on the incoming power to the disconnect. This will ensure proper operation of the unit. Failure to comply may damage the compressors and void the warranty.

• Do not jumper any safety devices when operating the unit. This may damage components within or cause serious injury or death.

• Do not operate compressor when the outdoor temperature is below 40ºF.

• Do not short-cycle the compressor. Allow 5 minutes between “on” cycles to prevent compressor damage.

• DX system is charged with refrigerant. Start-up

must be performed by EPA Certied Technician.

Compressor 2 Model No. ________________________

Start-Up Date _________________________________

Start-Up Personnel Name _______________________

Start-Up Company _____________________________

Phone Number ________________________________

Packaged and Split Rooftop Ventilator

Pre-Start-Up Checklist - Packaged DX

PremiSys

oDisconnect and lock-out all power switches. o Remove any foreign objects that are located in the

unit.

o Check all fasteners, set-screws, and locking collars

on the fans, bearings, drives, motor bases and accessories for tightness.

o Rotate the fan wheels and energy recovery wheels

by hand and ensure no parts are rubbing.

o Filters can load up with dirt during building

construction. Replace any dirty pleated filters and clean the aluminum mesh filters in the intake hood.

o Verify that non-motorized dampers open and close

properly.

o Check the tightness of all factory wiring connections. o Verify control wire gauge. o Verify diameter seal settings on the energy recovery

wheel.

o Verify proper drain trap installation. o Check condensing fans for any damage or

misalignment. Spin the blades and make sure they don’t contact any parts and are free turning without any resistance.

o Look over the piping system. o Inspect all coils within the unit. Fins may get

damaged in transit or during construction. Carefully straighten fins with a fin comb.

o If there is an indirect gas-fired furnace in this unit,

refer to the manual provided with this unit for PreStart-Up information.

o This unit contains a crankcase heater for each

compressor which needs power supplied to it 24 hours prior to start-up. If start-up is scheduled in 24 hours, unlock the disconnect power and energize unit.

SPECIAL TOOLS REQUIRED

• Voltage Meter (with wire probes)

• Amperage Meter

• Pressure Gauges – (refrigerant)

• Tachometer

• Thermometer

• Incline manometer or equivalent

Start- Up Procedure

The unit will be in operational mode during start-up. Use necessary precautions to avoid injury. All data must be collected while the unit is running.

o Make sure Pre-Start-Up checklist is complete. o Jumper R to G, R to Y1, and R to Y2 (if applicable) on

the control board.

o Turn the disconnect on. After 3 minutes compressors

will come on. Make sure all fans and compressors are rotating the correct direction.

o Allow the unit to run until the refrigerant system

stabilizes. Approximately 1-2 minutes.

Voltage Imbalance

In a 3-phase system, excessive voltage imbalance between phases will cause motors to overheat and eventually fail. Maximum allowable imbalance is 2%. To determine voltage imbalance, use recorded voltage measurements in this formula.

Key: V1, V2, V3 = line voltages as measured VA (average) = (V1 + V2 + V3) / 3 VD = Line voltage (V1, V2 or V3) that deviates farthest from average (VA)

Formula: % Voltage Imbalance = [100 x (VA-VD)] /VA

Packaged and Split Rooftop Ventilator

Start-Up Checklist - Packaged DX

PremiSys

Line Voltage. Check at unit disconnect.

L1-L2 Volts L2-L3 Volts L1-L3 Volts

Motor Amp Draw

Supply Motor Amps L1 Amps L2 Amps L3 Amps

Exhaust Motor Amps L1 Amps L2 Amps L3 Amps

Fan RPM Correct fan rotation direction?

Supply Fan RPM Supply Fan Yes / No

Exhaust Fan RPM Exhaust Fan Yes / No

Energy Wheel Motor

L1 Amps L2 Amps L3 Amps

Condensing Fans

Condensing Fan 1 L1 Amps L2 Amps L3 Amps

Condensing Fan 2 L1 Amps L2 Amps L3 Amps

Condensing Fan 3 L1 Amps L2 Amps L3 Amps

Compressors

Outdoor Air Temperature Deg F Outdoor Air Relative Humidity % RH

Return Air Temperature Deg F Return Air Relative Humidity % RH

oCompressor 1: _______ L1 amps _______ L2 amps _______ L3 amps _______ Crankcase Heater

Superheat _______ Deg. F.

Should be between 8º and 12ºF.

Subcooling _______ Deg. F.

Should be between 12º and 17ºF.

Discharge Pressure _________ PSIG

Should be between 300 and 500 PSIG

Suction Line Pressure _________ PSIG

Should be between 100 and 135 PSIG

Liquid Line Temperature _______ Deg. F.

Suction Line Temperature _______ Deg. F.

Moisture Indicating Sight Glass

Liquid Visible Yes / No Color of Center Dot Green / Yellow

Hot Gas Bypass Operational Yes / No

oCompressor 2: _______ L1 amps _______ L2 amps _______ L3 amps _______ Crankcase Heater

Superheat _______ Deg. F.

Should be between 8º and 12ºF.

Subcooling _______ Deg. F.

Should be between 12º and 17ºF.

Discharge Pressure _________ PSIG

Should be between 300 and 500 PSIG

Suction Line Pressure _________ PSIG

Should be between 100 and 135 PSIG

Liquid Line Temperature _______ Deg. F.

Suction Line Temperature _______ Deg. F.

Moisture Indicating Sight Glass

Liquid Visible Yes / No Color of Center Dot Green / Yellow

Hot Gas Bypass Operational Yes / No

Packaged and Split Rooftop Ventilator

Start-Up Components - Packaged DX

PremiSys

Fan

The fan should be checked for free rotation. If any binding occurs, check for concealed damage and foreign objects in the fan housing.

CAUTION

When operating conditions of the fan are to be changed (speed, pressure, temperature, etc.), consult manufacturer to determine if the unit can operate safely at the new conditions.

Supply Fan (Plenum Type)

The unit contains one plenum supply fan located on the end of the unit opposite the outdoor air intake and may optionally have a relief air blower which is referred

to as an exhaust blower in this document. Efcient fan

performance can be maintained by having the correct offset.

Offset: Proper offset, or overlap, is adjusted by loosening the wheel hub from the shaft and moving the wheel to the desired position along the shaft. The transition between the inlet cone

and the wheel should

Wheel

Offset

Inlet

Cone

be as shown; there is a smooth feel to the

prole when moving

one component to the other.

Supply/Exhaust Fan

The optional exhaust fan is a direct-drive plenum type. Fan speed is controlled by a VFD which, in turn, is controlled by the microprocessor controller or by an external signal. Motor speed will be set on the VFD during the unit Test and Balance, but after that, the VFD will not normally be changed. Always check the motor amperage rating shown on the motor nameplate when changing the fan RPM. All access doors must be installed except the control center door.

Vibration

Excessive vibration may be experienced during initial start-up. Left unchecked, excessive vibration can cause a multitude of problems, including structural and/ or component failure. The most common sources of vibration are listed.

Many of these conditions can be discovered by careful observation. Refer to the Troubleshooting section of this manual for corrective actions. If observation cannot

locate the source of vibration, a qualied technician

using vibration analysis

Vibration Causes

Off axis or loose components Drive component unbalance Poor inlet / outlet conditions Foundation stiffness

building by the ductwork. To eliminate this undesirable

effect, the use of exible connectors is recommended.

equipment should be consulted.

Generally, fan vibration and noise is transmitted to other parts of the

Fan Size

Offset

(inches)

Tolerance

(inches)

ER35C 5/32 ± 1/32

ER45C 3/16 ± 1/32

ER50C 13/64 ± 1/32

ER56C 1/4 ± 1/32

Refer to the respective Installation, Operation and Maintenance Manual shipped with this unit for additional start-up and maintenance information regarding the plenum fan.

Fan Wheel Rotation Direction

Check for proper wheel rotation by momentarily energizing the fan. Rotation is determined by viewing the wheel from the drive side and should match the rotation

decal afxed to the fan housing.

If the wheel is rotating the wrong way, direction can be reversed by interchanging any two of the three electrical leads. Check for unusual noise, vibration or overheating of the bearings. Refer to the Troubleshooting portion of this manual if a problem develops.

Discharge Air Temperature Sensor

Units are supplied with a Discharge Air Temperature

Sensor that is to be eld-installed prior to unit start-

up. The sensor is to be installed at least three duct diameters downstream of the heat exchanger. The sensor must be connected directly to the microprocessor controller.

All other sensors and low voltage devices are to be connected to the low voltage terminal strip in the control center. The discharge air sensor is shipped loose and can be found in the unit’s control center. See the unit-

specic wiring diagram for connection locations.

Typical Discharge Air

Temperature Sensor

Packaged and Split Rooftop Ventilator

Airow Monitor

PremiSys

For additional information on how to navigate through the airﬂow controller menus, refer to technical manuals GF-2200A from GreenTrol® Automation Inc. at www. greentrol.com.

Field calibration procedure:

1. Turn off power to the unit using the power disconnect(s).

2. Remove the cover from the GreenTrol airow

monitoring controller.

3. Install a jumper wire between terminals R and G on the unit’s terminal board if one isn’t present.

4. When safe, turn the power back on to the unit using the power disconnect(s).

If no microprocessor controller, skip to step 8. Steps 5 thru 7 are for microprocessor only.

5. Look at the unit’s microprocessor controller screen and view the status of the unit. If the displayed status is “System Off” continue with step 6, otherwise go to step 7.

6. Adjust the unit on/off priorities on the unit’s microprocessor controller so that the unit will run for calibration.

a. Push the “Prg” button on the microprocessor

controller.

b. Use the up and down arrows to get to the “On/

Off Unit” menu.

c. Push the enter button to view the current unit

on/off priorities.

d. Push the down arrow to display the Unit ON/

OFF Control screen.

e. Record the settings below so they can be

changed back when calibration is complete.

By digit input: __________

By BMS: __________

By Scheduler: __________

f. Use the enter button to navigate between the

different settings on the page, use the up and down arrows to change the values so that “By digit input” is the only setting with “Yes”.

7. Enter the service override menu to control the damper position.

a. At the Home Screen push the “Prg” button. (If

you’re not at the home screen push the escape button until you get there).

b. Use the up and down arrows to get to the

“Service” menu, then push the enter button.

c. If you’re asked for a password, enter “1000” for

the password and push enter.

d. Use the up and down arrows to get to the

“Overrides” screen, then push enter.

e. Use the arrow buttons to get the supply

override.

8. Measure the supply airow rate of the unit using an

approved test and balance method.

9. Without making any changes to the system,

calibrate the airow monitoring controller so it reads the airow measured in step 8 by using the Field

Calibration Wizard.

a. The eld calibration lasts for two minutes. Any

signicant changes in airow will affect the

accuracy of the reading.

b. To enter the Field Calibration Wizard, hold the

Down and Enter buttons simultaneously on the

airow controller, then release the buttons.

c. Push the enter to enter to go Wizard 1

d. Push the enter button twice and change Wiz1

Enable to YES.

e. When asked for the number of calibration

points (Cal Points), set the value to 1.

f. Push the enter button when the display says

“Set Flow 1”.

g. After completing the steps above, set the

FLOW1 value to the airow measured in step 8,

then push the enter button to begin calibration.

10. After the calibration is completed, measure the

supply airow rate again and compare with the value on the airow controller’s display

a. If the values are within 5% of each other the

device has been successfully calibrated.

b. If the values are not within 5% of each other

repeat the eld calibration process.

11. If you had to change the On/Off priorities on the microprocessor unit controller, change them back to the values that were written down in part 6.

12. Turn off power to the unit using the power disconnect(s) and wait one minute for the variable frequency drive(s) to lose backup power.

13. Replace the cover to the GreenTrol airow

monitoring station.

14. If you added a jumper between terminals R and G in step 3 remove it at this time. If a jumper was already in place, leave it in place.

15. When safe, turn the power back on to the unit using the power disconnect(s).

a. Recycling of the power resets the manual

override values that were set during the calibration.

Packaged and Split Rooftop Ventilator

Energy Wheel (MPE and MPF)

PremiSys

Start-Up

If selected, the energy wheel is installed in the unit’s airstream with one half of the wheel in the intake airstream and one half in the exhaust airstream. Air leakage between the two airstreams has to be kept to a minimum and the wheel has air seals that must be adjusted for that purpose. The seals must be adjusted at time of start-up.

Retaining

Adjustable

Air Seals

Drive Belt

Screws

Bearing Support

Label showing cassette

serial # and

date code

Drive Pulley

Drive Belt

Inspect the drive belt. Make sure the belt rides smoothly in the pulley and around the outside of the wheel. Note the directional arrow and data information shown in the image.

Adjust the Air Seals

Make sure the unit power supply is locked out. Disconnect the wiring to the wheel module and pull the wheel cassette out of the cabinet on its tracks. Large cassettes are not removable. Then slowly rotate the wheel by hand to make sure there is no binding or misalignment.

There is a perimeter seal located around the outside of the wheel and a diameter seal across the face of the wheel on both sides. Check to make sure that all air seals are secure and in good condition.

Adjust the air seals by loosening all the air seal retaining screws on the bearing support. Using a piece of paper as a feeler gauge, adjust the seals so they almost touch the face of the wheel while tugging slightly on the paper. When the wheel is rotated, there should be a slight tug on the paper. Tighten the screws, repeat the steps on the other set of seals.

Push the wheel cassette back into the unit and plug in the power connector. Turn the main power supply back on and then observe the operation of the wheel by

opening the wheel access door slightly. Remove lters if

necessary to observe the wheel.

Sequence of Operation

Optional Economizer - The economizer will be locked

out when: the outside air is <40° F (- 2° F hysteresis,

adjustable); the unit is operating in dehumidication

mode; or there is a call for heating.

• Stop Wheel: When economizer mode is enabled

and there is a signal for cooling, the wheel will stop rotating to allow free cooling.

• Modulate Wheel: When economizer mode

is enabled and there is a signal for cooling, the wheel VFD modulates wheel speed to maintain the discharge temperature set point.

Optional Frost Control - The microprocessor controller will output a signal when wheel frosting is occurring which is determined by a temperature set point (OA <5° F – 2° F hysterisis, adjustable) and wheel pressure drop increase.

• Preheat: When frosting is occurring, the preheater

is energized to defrost the wheel. Once the pressure drop decreases below the set point, the preheater is de-energized.

• Timed Exhaust: When frosting is occurring, the

supply blower is cycled off. The exhaust blower shall continue to run, allowing the warm exhaust air to defrost the wheel. After the 10 minute cycle, the supply fan is re-energized to continue normal operation.

• Modulating Wheel: Includes a VFD in addition

to the thermostat and pressure sensor. When modulating wheel frost control is initiated, the VFD will reduce the speed of the wheel, which keeps the exhaust air condition from reaching saturation, thus, eliminating condensation and frosting. If the outdoor air temperature is greater than the frost threshold temperature OR the pressure differential is less than the set point, the wheel will run at full speed. If the outdoor air temperature is less than the frost threshold temperature AND the pressure differential is greater than the set point, the wheel will run at reduced speed until the pressure differential falls below the set point. The temperature and pressure differential set points are set at the factory, but are

eld-adjustable. The VFD will be fully programmed at

the factory.

Alarms Indication - Microprocessor shall have one

digital output for remote indication of an alarm condition.

Possible alarms include:

• Wheel Rotation Alarm: Monitors wheel

rotation, and sends a signal to controller (after a 15 second time delay with no rotation) that signals the microprocessor controller to activate an alarm.

Packaged and Split Rooftop Ventilator

Energy Wheel Maintenance (MPE and MPF)

PremiSys

WARNING

Whenever performing maintenance or inspections, always disconnect the power source.

Inspection

The wheel should be inspected semiannually in accordance with the maintenance schedule. Maintenance of the wheel consists mainly of inspecting the wheel for cleanliness and then checking the drive motor, belt, and pulley for wear. If the wheel layers appear dirty, the wheel should be disassembled and cleaned.

The wheel rotates through the two airstreams which are moving in opposite directions, the wheel is self-cleaning, up to a point. If the

Energy Wheel

Cassette

wheel media becomes blocked by dirt or dust, or if the media collects a layer of smoke

residue or an oily lm, the energy transfer efciency

drops.

The main factor in the frequency of cleaning is the

cleanliness of the air. If air lters are not changed

frequently, the wheel will collect contaminants and will then have to be cleaned.

Wheel Disassembly

Wheels are part of a cassette that may be pulled from the unit for easy access. There may be a small damper assembly or other component that blocks removal of the cassette. Before sliding out the cassette or any other component, disconnect any power supply cord and secure it so it cannot jam or otherwise get damaged.

Each wheel has removable segments that hold the coated layers of media and each segment is held in place with two retaining clips located on the outer rim of the wheel. When removing more than one segment, remove them in sequence from opposite sides of the wheel (180 degrees apart) to reduce the imbalance. Secure the wheel against rotation. Carefully release the two retaining clips and swing them fully open. The segment can now be removed by pushing the face of the segment close to the outer rim of the wheel. Wheel segments are built to close tolerances and the segment may have to be jiggled to remove it. Do not use a hammer or otherwise force the segment because these are high value items and are not built to withstand abuse.

Whenever retaining clips are opened, they should be closed as soon as possible. If the wheel should rotate when a clip is open, the clip will jam against the bearing support bar and could cause damage.

Segment Retaining Clip

Cleaning

Maintenance or cleaning of the wheel segments should be done with the segments removed from the wheel cassette to avoid splashing liquids or cleaning agents inside the cabinet. If the energy wheel appears excessively dirty, it should be cleaned to

ensure maximum operating efciency. Only excessive

buildup of foreign materials needs to be removed.

DISCOLORATION AND STAINING OF ENERGY RECOVERY WHEEL DOES NOT AFFECT ITS PERFORMANCE.

Thoroughly spray the wheel matrix with a household cleaner such as Fantastik™ or the equivalent. Gently rinse with warm water and use a soft brush to remove any heavy accumulations. A detergent/water solution can also be used. Avoid aggressive organic solvents, such as acetone. Wheel segments can be soaked in the above solution overnight for removal of stubborn dirt or accumulations.

After cleaning is complete, shake excess water from the wheel or segments. Dry the wheel or segments before putting them back into the cassette.

Reassembly

When reinstalling the segments, be sure to install them with the correct face toward the motor side of the cassette. Note that one face of each segment is smooth and the other face has a reinforcing channel or support cut into the surface.

Wheel Segment

(Pulley Side)

Wheel Segment

(Motor Side)

Energy Recovery Wheel Belt

Inspect belts each time lters are replaced. Belts that

look chewed up or are leaving belt dust near the motor pulley may indicate a problem with the wheel. Be sure to inspect wheel for smooth and unrestricted rotation. If a belt requires replacement, contact the local manufacturer representative. Instructions for replacement will ship with the new belt.

Energy Recovery Wheel Bearing

In the unlikely event that a wheel bearing fails, the bearing is behind a removable plate on the wheel support beam (slide cassette halfway out of cabinet to access). Contact the local manufacturer representative for detailed instructions on how to replace the bearing.

Packaged and Split Rooftop Ventilator

Energy Wheel – Troubleshooting (MPE and MPF)

PremiSys

Symptom Possible Cause

Energy wheel does NOT turn

Air seals are too tight.

Broken belt. Replace.

Corrective Action

Refer to Adjust the Air Seals in the Optional Energy Wheel Start-Up section.

No power to wheel motor. Make sure wheel drive is plugged in. Verify power is available.

Energy wheel runs intermittently

Wheel motor overloads are tripping due to rubbing between wheel and air seals.

Recheck air seals, make sure they are not too tight. See Adjust the Air Seals in the Optional Energy Wheel Start-Up section.

Troubleshooting – Alarms

Several of the electronic controls in the unit monitor the system for faults and will go into alarm, shutting down the unit or a single function within the unit.

Microprocessor Controller

Check the screen on the microprocessor controller for an alarm condition. If it is in an alarm condition, a message will show on the screen.

The microprocessor controller is located in the main control center. If it is in alarm condition, the Alarm button

will blink red. Press the Alarm button to see the specic

condition or to reset the microprocessor controller. Refer to the microprocessor controller IOM for detailed

information on fault codes and see the unit-specic

wiring diagram.

Phase Monitor

The phase monitor has two LED indicator lights, one red and one green. Green indicates proper operational status, red indicates the unit has detected a fault and is in alarm condition. The alarm LED will blink to show the

specic fault and there is a chart printed on the monitor

that shows the code for the blinking light. The phase monitor is self-resetting once the alarm condition is corrected. It is located in the main control center.

Variable Frequency Drive (VFD)

Variable frequency drives have a display screen that will show an alarm condition. If a fault such as a voltage spike occurs, the VFD will go into alarm and will not reset until a hard restart is performed. See the unit-

specic manufacturer’s manual supplied with the unit.

VFDs are located in the main control center.

Optional Digital Scroll Compressor Controller

Present only if packaged DX with digital scroll option is selected. The controller has three LED indicator lights. One is green, indicating that it has power, one is an alarm

indicator that will ash a code

for various alarm conditions and the third indicates whether the compressor is operating in a loaded or unloaded condition. See

the manufacturer’s unit-specic manual for further

information.

See the Fault Code chart below. The Fault Code chart is also printed on the back of the controller. Note that if the controller generates either a Code 2 or a Code 4 Lockout, a manual reset must be performed. Manual Reset is accomplished by shutting off main power to the unit and then turning it back on.

Digital Scroll Compressor

Controller Fault Codes

Alert Code

Code 2*

Code 3

Code 4* Locked Rotor Blinks 4 Times Lockout

Code 5

Code 6

Code 7 Future N/A N/A

Code 8

Code 9 Low Voltage Blinks 9 Times Trip Compressor

System Condition

High Discharge Temperature Trip

Compressor Protector Trip

Demand Signal Loss

Discharge Thermistor Fault

Welded Contactor

*Protective faults that require manual reset.

Diagnostic Alert Light

Blinks 2 Times Lockout

Blinks 3 Times Lockout

Blinks 5 Times Lockout

Blinks 6 Times

Blinks 8 Times

Action

Reduce Capacity

Unload Compressor

Packaged and Split Rooftop Ventilator

Troubleshooting – Unit

PremiSys

Symptom Possible Cause Corrective Action

Blown fuse or open circuit breaker. Replace fuse or reset circuit breaker and check amps.

Blower fails to operate

Motor starters “chatter” or do not pull in

Motor over amps

Low airow

(cfm)

High airow

(cfm)

Excessive noise or vibration

Defective motor or capacitor. Replace.

Motor overloaded. Reset VFD and check amps.

Electrical.

Control power (24 VAC) wiring run is too long. (Resistance should not exceed 0.75 ohms).

Check for On/Off switches. Check for correct supply voltage. Check Control wiring.

Shorten wiring run to mechanical room or install a relay to turn unit on/off. Consult factory for relay information. Increase wire gauge size so that resistance is 0.75 ohms or less.

Incoming supply power is less than anticipated. Voltage supplied to starter coil must be within +10% / -15% of

Need to increase supply power or use a special control transformer which is sized for the actual supply power.

nominal voltage stated on the coil.

Static pressures are higher than design. Check for dirty lters. Improve ductwork.

Motor voltage incorrect.

Motor horsepower too low.

Check motor wiring. Check motor nameplate versus supplied voltage.

See specications and catalog for fan curves to determine if horsepower is sufcient.

Shorted windings in motor. Replace motor.

Unit damper not fully open. Adjust damper linkage or replace damper motor.

System static pressure too high.

Improve ductwork to eliminate losses using good duct practices.

Check maximum motor RPM and compare with catalog

Blower speed too low.

data. Verify that external control wiring is in place if required.

Fan wheels are operating backwards.

Dirty lter.

For 3-phase, see Direction of Fan Wheel Rotation Direction in Start-Up, Components section.

Replace lters or follow cleaning procedures in Routine

Maintenance section of this manual.

Leaks in ductwork. Repair.

Elbows or other obstructions may be obstructing fan outlet.

Blower fan speed too high.

Correct or improve ductwork.

Check for correct maximum fan RPM. Decrease maximum fan speed if necessary in the VFD.

Filter(s) not in place. Install lters.

Insufcient static pressure (Ps). (airow resistance)

Fan wheel rubbing on inlet.

Bearings.

Induce Ps into system ductwork. Make sure grilles and access doors are installed. Decrease fan speed if necessary.

Adjust wheel and/or inlet cone. Tighten wheel hub or bearing collars on shaft.

Replace defective bearing(s). Lubricate bearings. Tighten collars and fasteners.

Loose wheel on shaft. Tighten wheel hub.

Motor base or blower loose. Tighten mounting bolts.

Make sure ductwork is supported properly. Make sure

Noise being transmitted by duct.

ductwork metal thickness is sized for proper stiffness. Check duct size at discharge to ensure that air velocities are not too high.

Always have a completed Pre-Start-Up Checklist and Start-Up Checklist prior to requesting parts or service information.

Packaged and Split Rooftop Ventilator

Troubleshooting – Packaged DX Refrigeration Circuit

PremiSys

TROUBLESHOOTING NOTE

IMPORTANT

Do not release refrigerant to the atmosphere! If Before any components are changed on the refrigeration system, the cause of the failure must be identified. Further problems will exist unless the true cause or problem is identified and corrected.

required service procedures include the adding or

removing of refrigerant, the service technician must

comply with all federal, state and local laws. The

procedures discussed in this manual should only be

performed by a qualified EPA Certified Technician.

NOTE: Unit is equipped with a phase loss/phase reversal control. If system does not start, check phase of electrical

supply. The rst step in troubleshooting a refrigeration circuit is to examine the microprocessor controller and digital

scroll compressor controller

(if present) and see if there is a fault code. The next step is to check airow conditions (e.g. improper ductwork,

atypical wet bulb / dry bulb, etc.). After these steps have been eliminated, proceed with troubleshooting by following this guide.

Symptom Possible Cause Corrective Action

Open disconnect switch or circuit breaker.

Compressor contactor not closing.

Blown fuse or tripped breaker.

Close switch and/or breaker.

Check voltage to contactor coil, transformer, slave relay, system. Replace parts as necessary.

Check for reason and repair. Replace fuse after correcting problem.

Compressor will not run or does not start

Compressor starts but cuts out on low pressure

Low pressure switch activates at 50 PSIG

Low line voltage.

Check line voltage. If more than 10% from compressor marking, correcting is necessary.

Motor thermal protector automatically resets.

Compressor motor protector open.

Allow time (2 hours) for compressor to cool down so protector will reset. Restart and check for reason overheat occurred.

Check motor for open circuit, short circuit, grounded

Compressor defective.

windings, or burn out. Compressor may be seized; check refrigerant. If necessary, replace compressor.

High pressure switch open or defective.

Low pressure switch open or defective.

Open room thermostat or control. (No cooling required).

If manual reset (high pressure), reset switch. (Switch opens at 600 psi and will not reset above 420 psi for R-410A). Replace if defective.

Switch will open at 50 psi and auto-close at 90 psi. Replace if defective.

Check room temperature. If temperature is proper, wait for thermostat to close.

Loose wiring. Check all wire terminals and tighten as necessary.

Low or loss of refrigerant charge.

Check refrigerant pressures and temperatures (subcooling.)

Check for dirty evaporator coil, dirty lters, dampers

Airow restricted.

closed, iced evaporator coil, improper belt, check motor amps, check duct design.

Check refrigerant pressures, look for frosted tubing and

Restriction in refrigerant line.

components indicating a restriction. Check pressure drop

across the lter drier.

Defective low pressure switch. Replace.

Always have a completed Pre-Start-Up Checklist and Start-Up Checklist prior to requesting parts or service information.

Packaged and Split Rooftop Ventilator

Troubleshooting – Packaged DX Refrigeration Circuit

PremiSys

Symptom Possible Cause Corrective Action

Compressor starts but cuts out on high pressure switch

High pressure activates at 600 PSIG

Compressor cuts out on thermal overload

Refrigerant overcharge. Check pressures, charge by subcooling.

Condenser fan motor defective. Check fan motor.

Condenser coil inlet obstructed or dirty. Check coil and clearances. Clean coil if necessary.

Air or non-condensables in system.

Check high side equalized pressures, check thermal expansion valves.

Defective high pressure switch. Replace.

Restriction in discharge or liquid line.

Check refrigerant line pressures, check thermal expansion valves, replace any defective component.

Condensing fan relay not pulling in. Replace.

Low voltage. Check voltage.

Sustained high discharge pressure.

High suction and discharge pressures.

Defective compressor overload.

Check running amperage and conditions described under “low suction pressure” symptoms.

Check thermal expansion valve setting, check for air in system. Check air conditions and cfm.

If compressor is hot, allow compressor to cool for two hours. Recheck for open circuit.

Improper refrigerant charge. Check subcooling.

Improperly wired. Review wiring schematics.

Compressor hums, but will not start

Compressor noisy or vibrating

Loose wiring. Check all connections.

Defective start relay. Replace relay.

Motor windings damaged. Verify amp draw.

Improperly wired. Review wiring schematics.

Low line voltage. Check voltage.

Loose wiring. Check all connections.

Defective start relay. Replace relay.

Motor winding damaged. Verify amp draws. Replace compressor if necessary.

Internal compressor mechanical damage.

Replace.

Refrigerant overcharge. Check pressures and subcooling.

Liquid oodback.

Tubing rattle.

Scroll compressor rotating in reverse. (3-phase)

Check thermal expansion valve setting. Check for refrigerant overcharge.

Dampen tubing vibration by taping or clamping. Carefully bend tubing away from contact where possible.

Check high and low side pressures during operation to

conrm. Rewire for opposite rotation.

Damaged compressor. Replace the compressor.

Improper mounting on unit base.

Check that compressor is properly isolated and mounting bolts are tight.

Always have a completed Pre-Start-Up Checklist and Start-Up Checklist prior to requesting parts or service information.

Packaged and Split Rooftop Ventilator

Troubleshooting – Packaged DX Refrigeration Circuit

PremiSys

Symptom Possible Cause Corrective Action

High suction pressure

High discharge pressure

Excessive load on evaporator coil.

Compressor is unloaded. (digital scroll)

Check for high entering wet bulb temperature,

check for excessive air ow.

Check digital scroll controller signal and solenoid valve.

Check the thermal expansion valve, ensure bulb is

insulated. Check superheat. If superheat is high, then Expansion valve sensing bulb not secured to suction line.

valve is choking refrigerant ow.

• Check bulb for contact.

• Adjust valve for superheat ~10° F.

• Replace valve power head or valve.

Thermostatic expansion valve. Overfeeding.

Check bulb location and clamping. Adjust superheat.

Replace expansion valve power head.

Room load too large. Reduce the load or add more equipment.

Overcharged. Check pressures and subcooling.

Thermal expansion valve setting.

Air inlet to condenser dirty or obstructed.

Check thermal expansion setting and calibrate

superheat / subcooling.

Check for proper clearances and possible air recirculating.

Clean coil.

Condenser fan motor defective. Check condenser fan motor.

Too much refrigerant. Check subcooling. Remove excess refrigerant.

Non-condensable in system. Remove non-condensable from system.

Low suction pressure

Dirty condenser coil. Clean condenser coil.

Condenser fan not running or running backwards.

Check electrical circuit and fuse. Check fan cycling

controls.

High load conditions. Add more equipment or reduce load.

Refrigerant undercharge/loss of refrigerant charge.

Blower running backward.

Low entering air temperature. (Low load conditions).

Check pressures and subcooling.

Conrm blower rotation. If reversed, interchange any two

wires from 3-phase disconnect.

Check entering air wet bulb conditions.

Refrigerant leak. Check system for leaks. Repair leaks and add refrigerant.

Evaporator dirty or iced-up, or airow

restricted.

Clean the coil. Check fan operation. Check airow.

Plugged liquid line lter-drier. Replace lter-drier, check psi across lter.

Improper hot gas bypass setting. Check setting and correct as required.

Expansion valve defective, superheat too high or valve too small.

Adjust valve for proper superheat or replace the

expansion valve if too small or defective.

Moisture in system, check sight glass. Reclaim refrigerant, check for leaks, recharge.

Always have a completed Pre-Start-Up Checklist and Start-Up Checklist prior to requesting parts or service information.

Packaged and Split Rooftop Ventilator

Troubleshooting – Packaged DX Refrigeration Circuit

PremiSys

Symptom Possible Cause Corrective Action

Check subcooling, check for leak. Repair leak and add refrigerant.

Check superheating and adjust thermal expansion valve.

Check condenser controls and reset to obtain desired condensing temperature.

Check thermostat, check heat anticipator setting.

Check thermal expansion valve setting. Check for refrigerant overcharge. Check crankcase heater operation.

Check equalized high side pressure with equivalent outdoor temperature.

Check airow, check lters, check VFD control signal for

proper operation.

Check bulb of thermal expansion valve.

Check valve. If defective, replace.

Low discharge pressure

Compressor short cycles

Compressor loses oil

Not enough cooling or lack of cooling

Liquid line is frosted or wet

Suction line is frosting

Frost on evaporator coil

Insufcient refrigerant charge.

Defective or improperly adjusted expansion valve.

Low suction pressure. See “low suction pressure”.

Faulty condenser temperature controls. (Condensing fan cycle switch).

Thermostat location or controls malfunction.

Improper refrigerant charge. Check subcooling, verify superheat.

Defective high or low pressure control. Check high or low pressure switch.

Poor air distribution. Check ductwork for recirculating.

High discharge pressure. See “high discharge pressure”.

Low airow at evaporator(s). Check blower operation and airstream restrictions.

Incorrect unit selection (oversized). Contact factory.

Refrigerant leak. Check system for leaks. Repair leaks and add refrigerant.

Short cycling. Check low pressure control settings.

Refrigerant ood back.

Reheat ush cycle inadequate. Contact factory.

Refrigeration undercharged. Check subcooling. Adjust charge, if necessary.

Dirty lter or evaporator coil. Check lter, coil and airow.

Dirty or clogged condenser coil. Check coil and airow.

Air or other non-condensables in system.

Restriction in suction and liquid line. Check for restrictions in refrigerant circuit.

Control contacts stuck. Check wiring.

Excessive load. Add more equipment or reduce room load.

Restriction in liquid line. Clear restriction upstream of point of frosting.

Insufcient evaporator airow.

Malfunctioning or defective expansion valve.

Hot gas bypass valve not functioning properly.

Manual hot gas bypass valve closed. Open valve.

Low load or airow. Increase airow, check lters.

Always have a completed Pre-Start-Up Checklist and Start-Up Checklist prior to requesting parts or service information.

Packaged and Split Rooftop Ventilator

CN60, CNLEV2

Temperature

Resistance (KΩ)

Troubleshooting – Split DX Refrigeration Circuit

PremiSys

Part Name Checking Points

Liquid pipe thermistor (TH22)

Gas pipe thermistor (TH23)

Reheat pipe thermistor (TH25)

Disconnect the connector then measure the resistance between terminals with a tester. (Surrounding temperature 10ºC~30ºC [50ºF~86ºF].

Normal Abnormal

4.3kΩ~9.6kΩ Open or short

(Refer to the <Thermistor characteristic graph>)

Liquid thermistor (TH22)

Gas pipe thermistor (TH23)

Reheat pipe thermistor (TH25)

Thermistor R10 = 15kΩ ± 3%

Fixed number of B = 3460kΩ ± 2%

Rt = 15exp {3465 (1⁄273+t - 1⁄273)}

-20-10

41432506886

01020304050

104 122

(˚C) [˚F]

0ºC 32ºF 15kΩ

10ºC 50ºF 9.7kΩ

20ºC 68ºF 6.4kΩ

25ºC 77ºF 5.3kΩ

30ºC 86ºF 4.3kΩ

40ºC 104ºF 3.1kΩ

Linear Expansion Valve

White

Yellow

Orange

LEV

Blue

Red

Brown

3 4 5

Solenoid valve coil

SV10, SV11

Disconnect the connector then measure the resistance between terminals with a tester.

Normal Abnormal

1-5

White-Red

2-6

Yellow-Brown

3-5

Orange-Red

4-6

Blue-Brown

Open or short

200 kΩ ± 10%

Measure the resistance between the terminals with a tester.

(Surrounding temperature 20ºC [68ºF]

Normal Abnormal

1183Ω ± 100% Open or short

Packaged and Split Rooftop Ventilator

LEV

(G)

Valve opening (refrigerant flow rate)

80 - 100 pulses

PremiSys

The valve opening changes according to the number of pulses.

1- AHU controller board and LEV Connection.

(J)

(A)

12VDC

(C)

(A)

(E)

(F)

(D)

(B)

(A) Brown (F) White

(B) Red (G) Control board

(D) Orange (I) Drive circuit

(E) Yellow (J) Linear expansion valve

2- Pulse Signal Output and Valve Operation

Output (phase)

number

ø1

ø2

ø3

ø4

1 2 3 4

ON OFF OFF ON

ON ON OFF OFF

OFF ON ON OFF

OFF OFF ON ON

Output State

(B)

(C)

(D)

(E)

(F)

(H)

(I)

Output pulses change in the following orders when the

Valve is closed: 1 →2 →3 →4 →1

Valve is open: 4 →3 →2 →1 →4

*1. When the LEV opening angle does not change, all

the output phases will be off.

*2. When the output is open phase or remains ON, the

motor cannot run smoothly, and rattle and vibrates.

3- LEV Valve Closing and Opening Operations

Valve closed

Packaged and Split Rooftop Ventilator

Valve open

Fully open: 1400 pulses

Pulses

* When the power is turned on, the valve closing signal of 2200 pulses will be output from the inboard to LEV to

x the valve position. It must be xed at Point A.

When the valve operates smoothly, no sound from LEV or no vibration occurs, however, when the pulses change from E to A in the chart of the valve is locked, a big sound occurs.

* Whether a sound is generated or not can be determined by holding a screwdriver against it, then placing your ear against the handle.

Judgment Methods and Possible Failure Mode

PremiSys

Malfunction Mode Judgment Method Remedy

Microcomputer driver circuit failure

Disconnect the control board connector and connect the check

LED as shown in the gure below.

1 k

LED

When the drive circuit has a problem, replace the control board.

resistance: 0.25W 1kΩ

LED: DC15V 20mA or more

When the main power is turned on, the control board pulse signals to the LEV’s for 10 seconds

LEV mechanism is locked

If the LEV is locked, the drive motor runs idle, and makes a small clicking sound.

Replace the LEV.

When the valve makes a closing and opening sound, the valve has a problem.

Disconnected or short-circuited LEV motor coil.

Faulty wire connections in the connector or faulty contact.

Measure resistance between the coils (red-white, red-orange, brown-yellow, brown-blue)using a tester. They are normal if resistance is 200 ohm ± 10%.

1. Check for loose pins on the connector and check the colors of the lead wires visually.

2. Disconnect the control board’s connector and conduct a continuity check using a tester.

Replace the LEV coils.

Check the continuity at the points where an errors occurs.

Solenoid Valve

Judgement methods and possible failure mode

Solenoid valves are normally closed when de-energized and open when energized. Solenoid valves should make a clicking noise when coil is energized. If no noise is heard, follow coil test procedure below.

Measure the temperature at the upstream and dwonstream pipes of the solenoid valve. When the solenoid valve in ON: There is no temperature difference. When the solenoid valve is OFF: there is a temperature difference.

Solenoid valve coil

SV10, SV11

Measure the resistance between the terminals with a tester.

(Surrounding temperature 20ºC [68ºF]

Normal Abnormal

1183 ± 100Ω Open or short

Packaged and Split Rooftop Ventilator

Routine Maintenance

PremiSys

DANGER

Electric shock hazard. Can cause injury or death. Before attempting to perform any service or maintenance, turn the electrical power to the unit to OFF at disconnect switch(es). Unit may have multiple power supplies.

CAUTION

This unit requires minimal maintenance to operate properly. Maintenance requirements for this model vary for each installation and depend greatly on how much the system is used and the cleanliness of the air. Proper maintenance will both increase the life of the

system and maintain its efciency. Maintenance must be

performed by experienced technicians and in the case of

refrigeration systems, must be done by an EPA certied

technician.

Maintenance frequency is based on a presumed nominal use of the system. If the system is being run constantly, the frequency should be adjusted accordingly. If there is seasonal debris in the air which can be drawn into

the lters and the coils, they should be checked more

frequently. If the system is being used for only a few hours per day, the frequency may be reduced. Use the maintenance log at the end of this manual to record each maintenance session and observations and then establish a maintenance schedule that is appropriate for the installation. The following is provided as a guideline:

Maintenance Frequency:

Monthly

1. External Filter

Clean metal mesh lters

2. Internal Filters Replace MERV 8 lters monthly.

Adjust replacement schedule for MERV 13 or

other lters as inspection requires.

Semiannually

1. Check motor and motor bearings Check for excessive heat, vibration or noise.

Lubricate bearings in accordance with the motor manufacturer’s recommendations.

2. Condensate Drain (if applicable)

Inspect and clean – rell with water

3. Condenser Coils Inspect for cleanliness – clean as required

Annually

It is recommended that the annual inspection and maintenance occur at the start of the cooling season. After completing the checklist, follow the unit startup checklist provided in the manual to ensure the refrigeration system operates in the intended matter.

1. Lubrication Apply lubricant where required

2. Dampers Check for unobstructed operation

3. Blower Wheel and Fasteners Check for cleanliness

Check all fasteners for tightness Check for fatigue, corrosion, wear

4. Door Seal Check if intact and pliable

5. Wiring Connections Check all connections for tightness

6. Cabinet Check entire cabinet, inside and out, for dirt

buildup or corrosion. Remove accumulated dirt, remove any surface corrosion and coat the area

with appropriate nish.

Packaged and Split Rooftop Ventilator

Units with Packaged DX:

Semiannually

1. Evaporator Coil Maintenance Check for cleanliness - clean if required

2. Condenser Coil Maintenance Check for cleanliness - clean if required

3. Condensate Drain

Inspect and clean - rell with water

4. Condensing Fan Blades and Motors Check for cleanliness Check all fasteners for tightness Check for fatigue, corrosion and wear

Maintenance Procedures

Filter

PremiSys

Lubrication - Check all moving components for proper lubrication. Apply lubricant where required. Any components showing excessive wear should be replaced to maintain the integrity of the unit and ensure proper operation.

Dampers - Check all dampers to ensure they open and close properly and without binding. Backdraft dampers can be checked by hand to determine if blades open and close freely. Apply power to motorized dampers to ensure the actuator opens and closes the damper as designed.

Gas Furnace - Maintain furnace in accordance with instructions in the Indirect Gas-Fired Heat IOM shipped with this unit.

Fan Motors - Motor maintenance is generally limited to cleaning and lubrication. Cleaning should be limited to exterior surfaces only. Removing dust and grease buildup on the motor housing assists proper cooling. Never wash-down the motor with high pressure spray.

Greasing of motors is only intended when ttings are provided. Fan motors typically have two grease ttings.

Each motor manufacturer has different lubrication schedules for different models. Go to the motor manufacturer’s website and download their maintenance requirements. Do not over-lubricate motors or use an incompatible grease. Many fractional motors are permanently lubricated for life and require no further lubrication.

Fan Wheel and Fasteners - Wheels require very little attention when moving clean air. Occasionally oil and dust may accumulate on the wheel causing imbalance. When this occurs, the wheel and housing should be cleaned to assure smooth and safe operation. Inspect fan impeller and housing for fatigue, corrosion, or wear.

Routinely check all fasteners, set screws and locking collars on the fan, bearings, drive, motor base and accessories for tightness. A proper maintenance program will help preserve the performance and reliability designed into the fan.

Internal Filter Maintenance - The unit will typically be

provided with 2-inch thick pleated paper lters in the airstream. These lters should be checked according

to a routine maintenance schedule and replaced as

necessary to ensure proper airow through the unit. Replacement lters shall be of same performance and quality as factory installed lters. Filter must be pleated design with integral metal grid. Two acceptable lter

replacements are Aerostat Series 400 or Farr 30/30®.

Filters upstream of the coil should be checked regularly.

If the lters are dirty, they should be cleaned or replaced. It is important the lters stay clean to maintain desired airow.

WARNING

REFER TO GENERAL SAFETY INFORMATION

Do not operate this unit without the lters and

birdscreen installed. They prevent the entry of foreign objects such as leaves, birds, etc.

Do not remove access panels or other unit components while standing on a ladder or other unsteady base. Access panels and unit components are heavy and serious injury may occur.

External Filter Maintenance- Aluminum mesh, 2-inch thick lters are located in the supply weatherhood (if the weatherhood option was purchased). These lters should be checked and cleaned on a regular basis for best efciency. The frequency of cleaning depends upon the cleanliness of the

Outdoor Air Intake Hood

Mesh Filter Access

incoming air. These lters should be cleaned by rinsing

with a mild detergent in warm water prior to start-up.

Coil Maintenance- Coils must be cleaned to maintain maximum performance. Check coils once per year under normal operating conditions and if dirty, brush or

vacuum clean. Soiled ns reduce the capacity of the

coil, demand more energy from the fan and create an environment for odor and bacteria to grow and spread through the conditioned zone. High pressure water

(700 psi or less) may be used to clean coils with a n

thickness over 0.0095 inches thick. TEST THE SPRAY PRESSURE over a small corner of the coil to determine

if the ns will withstand the spray pressure.

For coils with fragile ns or high n density, foaming

chemical sprays and washes are available. Many coil cleaners use harsh chemicals, so they must be used

with caution by qualied personnel only. Care must be taken not to damage the coils, including the ns, while

cleaning. Caution: Fin edges are sharp!

WARNING

Biological hazard. May cause disease. Cleaning

should be performed by qualied personnel.

Drain pans in any air conditioning unit will have some moisture in them, therefore, algae and other organisms will grow due to airborne spores and bacteria. Periodic cleaning is necessary to prevent this buildup from

plugging the drain and causing the drain pan to overow. Inspect twice a year to avoid the possibility of overow.

Also, drain pans should be kept clean to prevent the spread of disease. Cleaning should be performed by

qualied personnel.

Packaged and Split Rooftop Ventilator

Maintenance Log

PremiSys

Date _________________ Time ____________ AM/PM

Notes: ______________________________________

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Notes: ______________________________________

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Notes: ______________________________________

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Notes: ______________________________________

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Notes: ______________________________________

____________________________________________

Date _________________ Time ____________ AM/PM

Notes: ______________________________________

____________________________________________

Date _________________ Time ____________ AM/PM

Notes: ______________________________________

____________________________________________

Date _________________ Time ____________ AM/PM

Notes: ______________________________________

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Notes: ______________________________________

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Notes: ______________________________________

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Notes: ______________________________________

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Packaged and Split Rooftop Ventilator, Document# 479650 Rev. 6 April 2017

PremiSys® is a registered trademark of Greenheck Fan Corporation. Used with permission.

Premisys MP Series, MPE Series, MP-2-1, MP-4-0, MPE-1-1 Installation, Operation And Maintenance Manual

Specifications and Main Features

Frequently Asked Questions

User Manual