Cut Sheet

www.qmarkmep.com QMark Heating Products 3
THERMOSTATS
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THERMOSTATS
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-;376 Snap Action Snap Action Snap Action Snap Action
&?8/ SPST DPST SPST DPST SPST DPST SPST DPST
58$+;361 Model MD26 has Positive OFF Model M602W has Positive OFF Model M602TPW has Positive OFF Model M612W has Positive OFF
( 22A 22A 22A 22A
( 22A 22A 22A 22A
( 22A 22A 22A 22A
( 18A 18A 18A 18A
"347;<;? No Yes 125VA Yes 125VA Yes 125VA
$+61/@ 50ºF to 80ºF 45ºF to 75ºF 45ºF to 75ºF 45ºF to 75ºF
300/9/6;3+4 +/- 5ºF +/- 4ºF +/- 4ºF +/- 2 1/2ºF
/+;<9/:
These economy thermostats
are the snap action type that
are used in apartment
construction. Good thermostat
for its value. Ideal for radiant
cove heaters and baseboard.
These bi-metal snap action
thermostats are sensetive.
Large knob allow for easy
adjustment.
Same as M601W and
M602W except the cover
mounting cover offer
tamper proof feature.
Built-in heat anticipator as-
sures closer control of room
temperature. These snap ac-
tion thermostats are more
sensitive that
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-;376 Modulation (2 stage) Simultaneous switching (double ckt) Snap Action with Heat Anticipator Creep (Hydraulic) Action
&?8/ DPST SPST DPST SPST DPST
)+;;$+;361
( 22A 22A 22A 22A
( 22A 22A 22A 22A
( 22A 22A 22A 22A
( 18A 18A 18A na
"347;<;? Yes 125VA Yes 125VA Yes 125VA No
$+61/@ 50ºF to 80ºF 50ºF to 80ºF 50ºF to 90ºF 40ºF to 85ºF
300/9/6;3+4 Accuracy: Within 3ºF of setpoint Accuracy: Within 3ºF of setpoint +/- 2 1/2ºF +/- 2ºF
/+;<9/:
One thermostat controls two sep-
arate heating circuits and reduces
input during light load periods.
Second stage activates when
temperature drops to approx. 1
1/2ºF below the first stage turn-
ON temperature.
Simultaneous control of two
heating loads. Used where the
total load slightly exceeds capac-
ity of a single switch, where two
thermostats are impractical. Both
switches are calibrated to operate
at approx. the same temperature.
Line voltage thermostat with
everything; Performance, reliabil-
ity, durability, and a large knob.
Built-in heat anticipation assures
close temperature regulation.
Large knob for easy rotation.
Extra-sensitive element in
control knob senses radiant
heat as well as air tempera-
ture for ultimate control.
May cause slight radio or
television interference in
outlying fringe areas.