Siemens Powers TH 192 S Technical Instructions page 8

Technical Instruction
Document No. 155-065P25
Rev. 1, July, 1999
S S S S e e e e n n n n s s s s i i i i t t t t i i i i v v v v i i i i t t t t y y y y
A A A A d d d d j j j j u u u u s s s s t t t t m m m m e e e e n n n n t t t t
T T T T h h h h e e e e r r r r m m m m o o o o s s s s t t t t a a a a t t t t
C C C C a a a a li li li libr br br bra a a a t t t t i i i i o o o o n n n n
Page 8
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)
N N N N O O O O T T T T E E E E : : : : If the thermostat sensitivity is adjusted,
the thermostat must be recalibrated.
The thermostat is factory calibrated to a control pressure of 7.5 psi (52 kPa) when the set
point and the ambient temperature are both at 72°F (22°C). The factory sensitivity setting
is approximately 2.5 psi/°F (31 kPa/°C). No adjustments are required if these settings are
appropriate for the application. If the thermostat has been tampered, the sensitivity
changed, or is out of adjustment, use the following steps to re-calibrate the instrument.
S S S S t t t t e e e e p p p p 1 1 1 1 —
Remove cover using 192-632 calibration
tool. Verify room temperature is between
70 and 80°F (21 and 27°C).
Graduation
closest to the
minimum
(MIN) end of
the bimetal
element
1 psi/°F
F F F F i i i i g g g g u u u u r r r r e e e e 8 8 8 8 . . . . T T T T H H H H 1 1 1 1 92
(12 kPa/°C)
S S S S t t t t e e e e p p p p 2 2 2 2 —
Verify that supply pressure is 18 psi
(124 kPa). Set 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.
Siemens Building Technologies, Inc.
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92 92
A A A A d d d d j j j j u u u u s s s s t t t t m m m m e e e e n n n n t t t t . . . .
Landis Division