Honeywell AUTOMATIC CONTROL SI Edition User Manual

INDIVIDUAL ROOM CONTROL APPLICATIONS
ENGINEERING MANUAL OF AUTOMATIC CONTROL
395
CONTENTS
Individual Room Control Applications
ENGINEERING MANUAL OF AUTOMATIC CONTROL
Introduction ............................................................................................................ 397
Graphic Symbols ................................................................................. 398
Abbreviations ....................................................................................... 399
Air Terminal Unit Control ..................................................................... 399
Variable Air Volume ATU...................................................................... 399
Pressure-Dependent and Pressure-Independent ATU ................... 399
Single-Duct VAV ATU ...................................................................... 400
System Configuration ................................................................. 400
Throttling VAV ATU ..................................................................... 400
Variable Air Volume ATU ............................................................. 401
Variable Air Volume ATU with Electric Reheat ............................ 402
Constant Air Volume ATUs.......................................................... 402
Induction VAV ATU ...................................................................... 402
Parallel Fan ATU ......................................................................... 404
Series Fan ATU........................................................................... 404
Dual-Duct ATU ................................................................................ 406
Dual Duct Pressure Independent VAV ATU ................................ 406
Dual Duct Pressure Independent Constant Volume ATU............ 407
Unitary Equipment Control ............................................................................................................ 408
General................................................................................................ 408
Natural Convection Units ..................................................................... 408
Radiant Panels .................................................................................... 409
Unit Heaters ........................................................................................ 409
General ........................................................................................... 409
Control ............................................................................................ 410
Two-Position Control ................................................................... 410
Modulating Control...................................................................... 410
Down-Blow Unit Heater ................................................................... 410
Gas- or Oil-Fired Unit Heater .......................................................... 411
Unit Ventilators .................................................................................... 411
General ........................................................................................... 411
Control ............................................................................................ 412
ASHRAE Control Cycles............................................................. 412
Standby/Warmup Stage ......................................................... 412
Cycle I–Fixed Maximum Percentage of Outdoor Air............... 413
Cycle II–Fixed Minimum Percentage of Outdoor Air............... 413
Cycle III–Variable Outdoor Air ................................................ 414
Day/Night Setback Control ......................................................... 414
Unit Ventilator Digital Control ...................................................... 415
Precautions and Conditions for Successful Operation .................... 418
Blocked Airflow ........................................................................... 418
Power Failure .............................................................................. 418
Coil Freeze-Up ............................................................................ 418

Honeywell AUTOMATIC CONTROL SI Edition Specifications

General

Brand	Honeywell
Model	AUTOMATIC CONTROL SI Edition
Category	Control Systems
Language	English