Filter
Top Products
3
Model ERCH-HP Energy Recovery Unit
Table of Contents
General Safety Information ....................1
Receiving, Handling and Storage ...............2
Product Overview ............................4
Models and Capacities ........................4
Subassemblies
Coils ......................................5
Dampers ..................................5
Energy Wheel ..............................5
Filters . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .5
Heat Pump Module ..........................6
Optional Electric Heaters ......................6
Optional Indirect Gas Furnace ..................6
Installation
Dimensional Data ............................7
Unit Weights and Recommended Roof Opening ...7
Service Clearances ..........................8
Handling, Lifting and Lifting Lugs ...............9
Roof Curb Mounting, Dimensions, Weights ......10
Ductwork Connections ......................11
Rail Mounting / Layout .......................11
Exhaust Weatherhood .......................11
Start-Up Unit ...............................12
Pre-Start-Up Checklist .......................13
Start-Up Procedure .........................13
Voltage Imbalance ..........................13
Unit Start-Up Checklist ......................14
Electrical Information
General Electrical Information .................15
Discharge Air Temp Sensor ...................16
Plumbing/Piping Overview
Condensate Drain Trap ......................16
Optional Remote Control Panel and
Wiring Schematics .........................17
Typical Control Center Components ............18
Electrical Controls
Optional Frost Control .......................19
Optional Economizer ........................20
Phase Monitor .............................20
Variable Frequency Drive .....................20
Optional Rotation Sensor .....................21
Dirty Filter Sensor ..........................21
Energy Wheel
Start-Up ..................................22
Sequence of Operation ......................22
Maintenance ...............................23
Troubleshooting ............................24
Heat Pump Overview
Heat Pump Components .....................24
Heat Pump Controls ........................25
Refrigeration Schematic ......................26
Typical Operating Conditions ..................26
Unit Protection Module Fault Indicators .........27
Troubleshooting
Controller Alarms ...........................28
Airflow ...................................29
Unit ......................................30
Refrigeration Circuit ......................31-35
Maintenance
Monthly, Semianually, Annually ................36
Heat Pump ................................36
Maintenance Procedures
Lubrication ................................36
Dampers ..................................36
Fan Belts ..............................36-37
Fan Motors ................................37
Fan Wheel and Fasteners ....................37
Fan Bearings ..............................37
Internal Filter Maintenance ...................38
External Filter Maintenance ...................38
Coil Maintenance ...........................38
Maintenance Log ............................39
Warranty ............................Backcover