Honeywell W7750A User Manual

74- 2958- 1

® U.S. Registered Trademark
Copyright © 2000 Honeywell Inc. •  All Rights Reserved 

W7750A,B,C CONSTANT VOLUME AHU CONTROLLER

Abbreviations and Definitions ............................................................................... 10
Construction ......................................................................................................... 11

PERFORMANCE SPECIFICATIONS .........................................................  13
L

® Functional Profile .....................................................................  17

ANALOG INPUTS:......................................................................................  18
DIGITAL INPUTS: .......................................................................................  19
TRIAC OUTPUTS ON THE (W7750B,C MODELS ONLY):........................  19
DIGITAL OUTPUTS: ...................................................................................  19

General ........................................................................................................... 22
Allowable Heating and Cooling Equipment Configurations ............................ 24

STAGED HEATING/COOLING CONTROL ................................................  24
MODULATING HEATING/COOLING CONTROL .......................................  24
HEAT PUMP CONTROL.............................................................................  24
ECONOMIZER CONTROL .........................................................................  25
PNEUMATIC ACTUATOR CONTROL ........................................................  25
MIXED-OUTPUT-TYPE CONTROL ...........................................................  26

Occupancy Sensor  ......................................................................................... 26
Window Open/Closed Digital Input  ................................................................. 26
Wall Module Options ....................................................................................... 26
Dirty Filter Monitor  .......................................................................................... 27
Indoor Air Quality (IAQ) Override  ................................................................... 27
Smoke Control  ................................................................................................ 27
Freeze Stat  ..................................................................................................... 27

Overview .............................................................................................................. 29
Step 1. Plan the System ....................................................................................... 29
Step 2. Determine Other Bus Devices Required .................................................. 29
Step 3. Lay Out Communications and Power Wiring ........................................... 30

® Bus Layout ................................................................................ 30

POWER BUDGET CALCULATION EXAMPLE ..........................................  32
LINE LOSS .................................................................................................  33