Technical Instructions
Document Number 155-067P25
October 28, 2010
Page 8
Siemens Industry, Inc.
Changeover Point
Adjustment,
Continued
Figure 7. 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 8. TH 192 DN and DNV
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 9. TH 192 DN and DNV
Sensitivity Adjustment.