Product Overview

Technical Instruction
Document No. 155-067P25
Rev. 1, July, 1999
Page 10 Siemens Building Technologies, Inc.
Landis Division
Day Time Calibration
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1 —
Remove cover using 192-632
calibration tool. Verify room
temperature is between 70 and 80
°
F
(21 and 27
°
C).
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2 —
Verify that supply pressure is 18 psi (124 kPa).
Set day 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.
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3 —
Moisten needle and insert 192-633
test gauge and needle adapter in the
test port. Read control pressure.
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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.