27VEDEX 4000
Boiler (STB) Temperature Limiter
Resetting of the boiler temperature limiter (STB)
Tripping of the boiler’s temp limiter warns of
incorrect operation of the System, which re-
quires investigation.
NOTE
1. The STB temperature limiter is available on the
left cover side in the upper part.
Temperature
limiter
2. Disconnect the boiler power supply cables.
3. Loosen the screw holding the plate which closes
the access to STB switch. Now expose the STB
temperature limiter by moving the plate down.
4. Press down STB temperature limiter, shift back
the blank plate and tighten the screw holding it.
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