Honeywell A4021 Series User Manual

L
CONTENTS
Application 1................................................................
General 2....................................................................
Application (continued) 2.....................................................................
Features 3...................................................................
Description 4................................................................
Working principle 4..........................................................................
Specifications 7.............................................................
Mechanical 7...............................................................................
Electrical 7.................................................................................
Functional 7................................................................................
Dimensional drawings 9......................................................
Safety Provisions 10..........................................................
Energizing valve 1 and 2 10...................................................................
Use of terminal 12 10.........................................................................
Fail--safe relay drivers 10......................................................................
Anti--recycle--counter 10.......................................................................
Calculations 11...............................................................
General 11..................................................................................
Calculation examples 11.......................................................................
Installation and wiring 12......................................................
Installation 12................................................................................
Mounting Wiring Subbase 12...................................................................
Wiring 12....................................................................................
General considerations 12.....................................................................
Wiring 12....................................................................................
Pressure switch 12...........................................................................
General wiring diagrams 13....................................................
Applications with EC7850 14..................................................
Checkout 17..................................................................
Final checkout of the installation 17.............................................................
Troubleshooting 18...........................................................
Standards and Approvals 19...................................................
Ordering information 20.......................................................

Honeywell A4021 Series Specifications

General

Brand	Honeywell
Model	A4021 Series
Category	Control Unit
Language	English