User guide

9-15
Safety thermostats
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14
Sealing pipe thermostat with well.
Accessories
The STW Servies of universal strap-on thermostats are designed for floor heating applications. They
are suitable for use as strap-on, wall-mounted, or (with optional immersion well) immersion thermostat.
Devices of the STW Series measure temperature. If the sensor temperature exceeds the set value, a
snap-action switch opens, interrupting the electrical circuit. As soon as the sensor temperature drops
by more than 10 K, the snap-action switch again closes automatically. (Also, if the sensor temperature
drops to below approx. 20 degrees C, the snap-action switch opens, but closes again automatically
after the temperature rises again.
Accessories
Safety limiting thermostat, hand reset, large range (STW1)
Protection class IP54
Housing material Aluminium diecasting with plastic cover
Ambient temperature 0 ... 80
o
C
Switch function/capacity SPDT 230 Vac, 10 A
Mechanical lock/reset no mechanical lock
Certificates TUEV-approval STW (STB)89 401 S
Thermostat application immersion tube thermostat
Thermostat functions temp. setting inside, reset inside
Temp. setpoint range 20 ... 150
o
C
Mounting place in pipe
Immersion depth 150 mm
Immersion well material red brass, nickel plated
Immersion well thread R1/2"
Max. perm. temp. at
sensor
175
o
C
Additional description Fixed switching differential approx. 4% of setpoint value.
Type
STW1
Steel well R1/2" x 150 mm
T4NST
Safety strap-on thermostat for floor heating applications (STW)
Electrical connection M20x1,5
Protection class IP54
Housing material PA, ABS, PMMA
Ambient temperature 0 ... 80
o
C
Switch function/capacity max: 230Vac, 12 (2,5) A min: 24 Vad/dc, 100 mA
Mechanical lock/reset automatic reset
Setpoint device knob
Certificates CE, UL, PED, DIN EN 14597
Thermostat application strap-on thermostat
Differential fixed 10 K
Temp. setpoint range Type
o
C
20 ... 80 STW2080F
70 ... 130 STW70130F
Immerson well, G1/2, 100 mm
STG12-100F