User Manual

Siemens Building Technologies CA1N1328E / 11.1998
Landis & Staefa Division 1/2
1
328
Room thermostats
TRM2
TRM2S
for HVAC systems
TRM2S
Room thermostats used in heating, ventilation and air conditioning systems to
control the room temperature.
•
Adjustment range 5 ... 30 °C
•
Contact rating AC 250 V / heating 10(3) A or cooling 3(1) A
•
TRM2S : additional on/off -switch
Two different types are available, one of which has an on/off switch:
TRM2
Room thermostat with setpoint adjuster
TRM2S
Room thermostat whith setpoint adjuster and on/off switch
Please specify quantity, name and type designation when ordering.
Example:
1 room thermostat, type TRM2
The sensing element is a bimetal strip. When the temperature falls to the selected
setpoint, the bimetal strip causes the electrical contact to switch over.
The thermostat can be operated either with or without thermal feedback. The switching
differential
∆
t will change from 5 K to 1 K accordingly.
– without thermal feedback ± 5 K
– with thermal feedback ± 1 K
The required temperature can be selected by
rotating the setpoint adjuster. A maximum and
minimum range limit can be set by moving the
two sliding stops at the back of the adjuster.
Adjustment range for setpoint X
K
5 ... 30 °C.
°C
min.
max.
9H100
3
0
25
20
15
1
0
5
5
1
5
2(3)
2(3)
1
y
X
K
∆
t
t
[
°C
]
∆
t
T
9I805A
Type summary
Ordering
Technical design
Adjustments
Operating diagram