Data Sheet for Product
Technical Instructions TH 192 DN Day-Night and DNV Day-Night-Vent Room Thermostat
Document Number 155-067P25
February 11, 2022
Page 10 Siemens Industry, Inc.
Night Time Calibration
Step 1 —
If not already done, remove the cover
using the 192-632 calibration tool.
Verify that the room temperature is
between 70 and 80F (21 and 27C).
Step 2 —
Verify that the supply pressure is 25 psi
(172 kPa). Set the nighttime dial to room
temperature by turning the exposed adjustment
knob or using a hex key as shown. Allow the
thermostat to stand for about five minutes to
adjust to the new setting.
Step 3 —
Moisten the needle and insert the
192-633 test gauge and needle
adapter in the test port. Read the
control pressure.
Step 4 —
If the control pressure does not read 7 to 8 psi (48
to 55 kPa), turn the calibration screw using the
192-632 calibration tool or a 1/8” (3.2 mm) wrench
until the pressure is 7 to 8 psi (48 to 55 kPa). The
sensing element is now in calibration and the
setpoint can be changed to the desired room
temperature.