TH 192 HC Heating/Cooling Room Thermostat Technical
Instructions
Document Number 155-066P25
October 26, 2010
Siemens Industry, Inc.
Page 7
Changeover Point
Adjustment,
Continued
Figure 6. Changeover Point Adjustment.
Limit Stop
Adjustment
Thermostat limit stops define the
minimum and maximum thermostat
setpoints. The limit stops engage in the
setpoint cam gear teeth and cause
interference between the setpoint cam
gear and the adjustment knob gear.
To change limit stop settings, use needle
nose pliers to pull limit stop between the
setpoint cam gear teeth. Rotate limit
stop to its new position. Do not pull limit
stop any more than necessary to clear
the gear teeth. Changing the limit stop
position one gear tooth changes the limit
stop setting by 1-1/3
°
F (0.7
°
C).
Figure 7. TH 192 HC Limit Stop Adjustments.
Sensitivity
Adjustment
To change thermostat sensitivity, use a flat blade
screwdriver to carefully move the sensitivity slide to
the desired position as follows:
Graduation
closest to the
rigid end of the
bimetal element
4 psi/
°
F
(50 kPa/
°
C)
Graduation
closest to the
minimum
(MIN) end of
the bimetal
element
1 psi/
°
F
(12 kPa/
°
C)
NOTE:
If the thermostat sensitivity is adjusted, the
thermostat must be recalibrated.
Figure 8. TH 192 HC
Sensitivity Adjustment.
