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-MTW-0714
Non-Electric Operators
THERMOSTATIC OPERATOR
DIRECT MOUNT
MTW
DIRECT
MOUNT
DIRECTION
OF FLOW
DIRECT MOUNT THERMOSTAT
MOUNTED THRU FACE OF COVER
PIPE COLLAR
(NOT SUPPLIED)
Maximum & Minimum Setting
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
desired 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
desired 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
Nominal Opening: 0.018 (3.6°F)
Long Term Test: 5000 cycles (1.3°F)
DIAL SETTINGS:
0 = Off
* = 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