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7.2.1 Reset the high-limit thermostat.
Staff:
❒ Operator
Protective equip‐
ment:
❒ Protective workwear
❒ Protective gloves
❒ Safety shoes
Special tools:
❒ Screwdriver
The high-limit thermostat switches off the boiler at a temperature of 203-212°F
(95-100°C). The pumps continue to run.
Once the temperature falls below approx. 167°F (approx. 75°C), the high-limit thermo‐
stat can be reset mechanically.
❒ Unscrew the cap of the high-limit thermostat.
❒ Unlock the high-limit thermostat by pressing with a screwdriver.
❒ Refit the cap of the high-limit thermostat.
7.3 After troubleshooting
Once the fault is eliminated, perform the following steps to start the boiler up again:
❒ Reset the emergency stop device.
❒ Acknowledge the fault message at the boiler controller.
❒ Make sure that there is no one in the danger zone.
❒ Start the boiler according to the instructions in the “Heating the boiler” section.
7
Boiler faults
Troubleshooting table
74
Froling GesmbH | A-4710 Grieskirchen, Industriestraße 12 | www.froeling.com