Brochure

Tunstall Corporation
118 Exchange Street • Chicopee, MA 01013
© July 2014
We reserve the right to alter designs, specifications and information without notice.
Phone [phone] · Fax [phone]
www.tunstall-inc.com • www.maconcontrols.com
Bulletin-ZMC-ES-0714
Electric Operators
ELECTRIC ZONE VALVE ACTUATOR
ZMC - ES Series
3
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-ES
vertically on 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
Preferred installation position of
the Macon ZMC-ES is vertical
or horizontal. An upside down
position may reduce product life
through special circumstances
(e.g. contaminated water).
Calculation of maximum cable length (copper ca-
ble) for 24 V rated voltage
L = C x A / n
L Cable length in m
K Constant (269 m/mm²)
A Conductor cross-section in mm²
n Number of Alpha-Actuators
We recommend the following cables for installing
a 24 V system:
Telephone wire J-Y(ST)Y 0.8 mm
2
Light plastic-sheathed cable: NYM 1.5 mm²
Flat webbed building wire: NYIF 1.5 mm²
Transformer:
A safety isolating transformer according to EN
61558-2-6 (Europe) must always be used. Trans-
former dimensioning results from the making ca-
pacity of the Macon ZMC-ES.
Rule-of-thumb formula:
P
Transformer
= 6 W x n
n = Number of Actuators