Form PA102.20-N1
7
Installation & Assembly Manual │ PACE
Issue Date: 07/03/2018
Motors for Supply, Return, and Exhaust Fans .......................................................................................78
Wiring the Energy Recovery Wheel ...............................................................................................................78
Wiring the Gas Heat Device ...........................................................................................................................79
Wiring the Electric Heat Device ...................................................................................................................... 80
Power Options ....................................................................................................................................... 80
Disconnect Switch Options ....................................................................................................................80
Control Options .....................................................................................................................................81
Installing Electrical Heat Option ............................................................................................................81
Electric Humidifier ..........................................................................................................................................84
Humidifier .......................................................................................................................................................84
Field Penetrations for Piping and Electrical Connections ...............................................................................85
Tools Required ......................................................................................................................................85
Material Required ..................................................................................................................................85
Procedure .............................................................................................................................................. 85
Lights for AHUs ..............................................................................................................................................87
Piping Connections ........................................................................................................................................87
Coil Piping ......................................................................................................................................................88
Staggered Coils ..................................................................................................................................... 88
Hot and Chilled Water Coils ..................................................................................................................89
Water Treatment ............................................................................................................................................. 91
Freeze Protection ..................................................................................................................................91
Steam Coils ...........................................................................................................................................91
Steam Distributing Coils ........................................................................................................................91
Steam Control .......................................................................................................................................91
Steam Traps ..........................................................................................................................................91
Drains and Traps ............................................................................................................................................93
Condensate Drain Piping ......................................................................................................................93
Elevating AHU for Gravity Floor Drain Connections ..............................................................................94
Duct Connections ...........................................................................................................................................94
Duct Connection Guidelines ..................................................................................................................94
Flanged Duct or Sleeves .......................................................................................................................94
Raw or Straight Edge Duct or Sleeves ..................................................................................................95
Sound and Vibration Transmission .......................................................................................................95
Installing Top Discharge Outdoor AHU Duct .........................................................................................95
Installing Front and Rear Discharge Outdoor AHU Duct ....................................................................... 95
Vertical Tube Integral Face and Bypass (VIFB) and Integral Face and Bypass (IFB) ....................................97
Shipping Bolts (VIFB Only) ....................................................................................................................97
Piping Suggestions ...............................................................................................................................97
Flexible Connectors (VIFB Only) ........................................................................................................... 97
Freezing Conditions ..............................................................................................................................97
Refrigeration ................................................................................................................................................. 101
DX Direct Expansion Coils ..................................................................................................................101
Available Coil Arrangements ..............................................................................................................103
Thermostatic Expansion Valves (TXV) ........................................................................................................ 105
Hot Gas Bypass (HGBP) .............................................................................................................................. 105
Dx Coil Circuiting and Staging ......................................................................................................................105
Advantages of Multiple Control Stages ...............................................................................................106
Maintaining Adequate Airflow .....................................................................................................................106
VAV Systems ................................................................................................................................................ 107
TABLE OF CONTENTS (CONT'D)
To Next Page
Loading...
