Data Sheet for Product

TH 192 S Single Temperature Room Thermostat Technical Instructions
Document Number 155-065P25
February 7, 2022
Siemens Industry, Inc. Page 9
Troubleshooting
Before troubleshooting thermostat per Table 3, make certain there is clean dry supply air
at 18 psi (124 kPa) minimum. Use test probe gauge and needle adapter to measure
control pressure at thermostat test port.
The output pressure test port is accessible without removing the thermostat cover
through the 8th opening from the top. For one-pipe thermostats, the port is on the right
side. For two-pipe thermostats, the port is on the left side.
Figure 9. Accessing Output Pressure Test Port.