MODEL
MAC-3
MULTIPLE APPLIANCE CONTROL
Copyright © 1999, Tjernlund Products, Inc. All rights reserved.
P/N 8504043
REV. A 5/99
OWNER INSTRUCTIONS, DO NOT DESTROY
Recognize this symbol as an indication of important Safety Information!
THESE INSTRUCTIONS ARE INTENDED AS AN AID TO QUALIFIED, LICENSED
SERVICE PERSONNEL FOR PROPER INSTALLATION, ADJUSTMENT AND
OPERATION OF THIS UNIT. READ THESE INSTRUCTIONS THOROUGHLY
BEFORE ATTEMPTING INSTALLATION OR OPERATION. FAILURE TO FOLLOW
THESE INSTRUCTIONS MAY RESULT IN IMPROPER INSTALLATION, ADJUST-
MENT, SERVICE OR MAINTENANCE POSSIBLY RESULTING IN FIRE, ELECTRI-
CAL SHOCK, CARBON MONOXIDE POISONING, EXPLOSION, OR PERSONAL
INJURY OR PROPERTY DAMAGE.
!
PLEASE READ CAREFULLY AND KEEP ON JOB
SITE FOR FUTURE REFERENCE.
For Interlocking one Power Venter, Draft Inducer
IN-FORCER
TM
or Damper with up to three burners
TABLE OF CONTENTS
Cautions ..........................................................................................................................................................................1
Electrical Wiring
Electrical Specifications & Circuit Board Features .....................................................................................................1
Output Power Venter, Draft Inducer, IN-FORCER & Damper Wiring Diagrams ....................................................2, 3
Burner Input Wiring Diagrams ...............................................................................................................................4, 5
Alternative Wiring Diagrams ..................................................................................................................................5, 6
MAC-3 Wired With up to Five Gas Burners and One Power Venter, Draft Inducer or IN-FORCER................5
MAC-3 Wired With a Power Venter or Draft Inducer and a Commercial IN-FORCER ....................................6
MAC-3 Circuit Board Schematic ....................................................................................................................................6
Replacement Parts & Warranty.......................................................................................................................................7
DESCRIPTION
The MAC-3 is used for wiring up to 3 heating appliances with a single Draft Inducer, Power Venter, IN-FORCER or 115V Damper. It
is suitable for both 24 VAC and 115 VAC control systems for gas and oil burners. Plug-in relays must be purchased separately
depending on control system voltage of appliance.
Use Tjernlund part # 950-1040 relay For 24 VAC control systems.
Use Tjernlund part # 950-0480 relay For 115 VAC control systems.
TJERNLUND PRODUCTS, INC.
1601 Ninth Street • White Bear Lake, MN 55110-6794
PHONE (800) 255-4208 • (651) 426-2993 • FAX (651) 426-9547
Visit our web site • www.tjernlund.com
