SIEMENS TH193 HC Heating-Cooling Room Thermostat Instruction Manual
Document No. 129-078
Installation Instructions
March 15, 2022
If the thermostat has been tampered with, the
sensitivity changed, or it is out of adjustment, use the
following procedures to recalibrate the instrument.
Thermometer Calibration,
Continued
The output pressure test port (Figure 5) is accessible
without removing the thermostat cover through the
8th opening from the top as follows:
•
•
For one-pipe thermostats, the test port is on the
right side.
For two-pipe thermostats, the test port is on the
left side.
Figure 4. TH193 HC Thermostat Details.
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.
Figure 5. TH193 HC Output Pressure
Heating Test Port.
To change the limit stop settings, use a needle nose
pliers to pull limit stop (Figure 4) between the setpoint
cam gear teeth. Do not pull the limit stop any more
than necessary to clear the gear teeth. Rotate the
limit stop to its new position. Changing the limit stop
position one gear tooth changes the limit stop setting
by 1-1/3F (0.7C).
CAUTION:
If you use the wrong test port,
thermostat damage can occur and
result in replacement of the device.
Cooling Calibration
1. Remove the cover using the calibration tool.
Verify that the room temperature is between 70°F
and 80F (21°C and 27C).
Sensitivity Adjustment
The factory thermostat sensitivity setting is
approximately 2.5 psi/F (31 kPa/C). To change the
sensitivity, use a flat-blade screwdriver to carefully
move the sensitivity slide (Figure 4) to the desired
position as follows:
2. Verify that the supply pressure is 25 psi
(172 kPa). Set the cooling dial to the 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.
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)
3. Moisten the needle and insert the test gauge and
needle adapter in the cooling test port. Read the
control pressure.
NOTE: If the thermostat sensitivity is adjusted,
recalibrate the thermostat.
4. Check the control pressure. If it does not read 7
to 8 psi (48 to 55 kPa), turn the calibration screw
(Figure 4) using the calibration tool or a 1/8-inch
(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.
Thermostat Calibration
The thermostat is factory-calibrated to a control
pressure of 7.5 psi (52 kPa) when the setpoint and
the ambient temperature are both at 72°F (22°C). No
adjustments are required if these settings are
appropriate.
Siemens Industry, Inc.
Page 3 of 4
| General | Details |
|---|---|
| Name | SIEMENS TH193 HC Heating-Cooling Room Thermostat Instruction Manual |
| Make | SIEMENS |
| Language | English |
| Filetype | PDF (Download) |
| File size | 0.07 MB |
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