Brochure

Tunstall Corporation
118 Exchange Street • Chicopee, MA 01013
We reserve the right to alter designs, specifications and information without notice.
Phone [phone] · Fax [phone]
www.tunstall-inc.com • www.maconcontrols.com
Bulletin-MTWZ-0714
Non-Electric Operators
THERMOSTATIC OPERATOR
DIRECT MOUNT w/REMOTE SENSOR
MTWZ
Each unit is factory pre-set per dial settings listed.
If field adjustments are necessary, see below.
Maximum setting
1. Turn the wheel to maximum and a red mark will
occur in the indicating window (located opposite
the dial setting window).
2. Push the mark in while turning the wheel to de-
sired temperature according to below chart.
3. When reached desired temperature let go of the
mark and the maximum temperature limit is set.
Minimum setting
1. Turn the wheel to minimum and a blue mark will
occur in the indicating window (located opposite
the dial setting window).
2. Push the mark in while turning the wheel to de-
sired temperature according to below chart.
3. When reached desired temperature let go of the
mark and the minimum temperature limit is set.
DATA
Temp. Range: 46° - 82°F
Hysteresis: 0.9°F
Heat Transfer: 1.1°F (Valve Housing Sensor)
Dead Time: 0.8 Minutes
Max. Differential Pressure: 20 psi
Suggested Differential Pressure = 0.5 to 2.9 psi
Max. Water Temp.: 250°F
Max. Storage & Ambient Temp.: 122°F
Max. Steam Pressure: 15 psig
Max. Movement: 0.125
Long Term Test: 5000 cycles (1.3°F)
DIAL SETTINGS:
* = 46°F (Frost Protection)
1 = 54°F
3 = 61°F
5 = 68°F
6 = 72°F
7 = 76°F
8 = 80°F
9 = 82°F
2.05
3.66
6’6”
.93
2.50
SENSOR PROVIDED
WITH GUARD
(GUARD NOT SHOWN)
ANGLE VALVE
BODY
THERMOSTATIC DIAL
INSIDE ENCLOSURE