Product Overview

TH 192 DN Day-Night and DNV Day-Night-Vent Room Thermostat Technical Instruction

155-067P25

Rev. 1, July, 1999

Siemens Building Technologies, Inc. Page 11

Landis Division

Night Time Calibration

p p

p 1

1 —

If not already done, remove cover

using 192-632 calibration tool. Verify

room temperature is between 70 and

F (21 and 27

C).

p p

p 2

2 —

Verify that supply pressure is 25 psi (172 kPa).

Set night time dial to room temperature by

turning the exposed adjustment knob or using a

hex key as shown. Allow thermostat to stand for

about five minutes to adjust to the new setting.

p p

p 3

3 —

Moisten needle and insert 192-633

test gauge and needle adapter in the

test port. Read control pressure.

p p

p 4

4 —

If control pressure does not read 7 to 8 psi (48 to

55 kPa), turn calibration screw using 192-632

calibration tool or 1/8” (3.2 mm) wrench until

pressure is 7 to 8 psi (48 to 55 kPa). The sensing

element is now in calibration and the set point

can be changed to the desired room temperature.