Brochure
Table Of Contents
Tunstall Corporation 
118 Exchange Street • Chicopee, MA 01013 
© July 2014 
We reserve the right to alter designs, specifications and information without notice. 
Phone (413) 594-8695 · Fax (413) 598-8109 
www.tunstall-inc.com • www.maconcontrols.com 
Bulletin-ZMC-DDC-0714 
Electric Operators 
ELECTRIC ZONE VALVE ACTUATOR 
ZMC - DDC Series
3 
3.1 Dimensions 
4) Installation notes 
4.1 Installation with valve adapter 
The valve adapter assortment guarantees a perfect match of the valve drive to almost any valve bottom and heating circuit 
distributor available on the market. Simply snap-on the Macon ZMC-ES to the manually pre-installed valve adapter. 
Screw the adaptor manually 
onto the valve. 
Place the Macon ZMC-
DDC manually in vertical 
position to the valve adap-
tor. 
The Macon ZMC-ES snaps 
onto the valve adaptor with 
a “click” when pressed 
down vertically by hand. 
4.2 Installation position 
The Macon ZMC-DDC must be installed preferably in 
vertical or horizontal installation position. For over-
head” installation special circumstances (e. g. drain-
water) can reduce the lifetime of the actuator. 
Connect the line to the 
actuator. 










