Thermo Scientific 180 Series, Operating And Maintenance Manual

Page: 26 / 36

GP Water Baths 7-3 Thermo Scientific
Section 7
Service
Replace Thermostat
(Under the Pan)
Use the following procedure when the sensing bulb is located UNDER the
pan.
1. Put the power in the "OFF" position and disconnect power to the
bath.
2. Turn bath upside down and remove bottom plate and fiberglass
insulation.
3. Mark the location of the wire leads on the thermostat and disconnect.
4. Remove thermostat control knob by loosening two set screws on knob.
5. Remove two screws fastening thermostat to control panel.
6 Loosen the two hex nuts holding thermostat bulb bracket and pull the
thermostat and bulb out from behind the control panel.
7. Mount the new thermostat by reversing steps 1 through 6.
Caution Make sure the wire leads do not touch the heater element.
s