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Packaged and Split Rooftop Ventilator
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
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
© 2017 Mitsubishi Electric US, Inc.
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