Pace PAI Installation And Assembly Manual page 7

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
Form PA102.20-N1
TABLE OF CONTENTS (CONT'D)
7
Installation & Assembly Manual │ PACE
Issue Date: 07/03/2018