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4.5 Thermal fuses
The devices of the FLP series have several
thermal fuses which are electrically con-
nected in series. After one of the fuses has
tripped, the device switches to the fault sta-
tus. A device restart is required but is possi-
ble only if the relevant thermal switches have
cooled down or the thermal sensors have
been unlocked.
The following fuses are available:
on the cylinder cover
•
1 thermal switch (Klixon) to protect
against overheating of the steam cylin-
der; the switch has a pin for manual
reset after cooling down
•
1 or 2 (for devices with six radiators)
thermal sensors with capillary tube for
direct thermal monitoring of the radia-
tors. One capillary tube each is con-
nected to 1 to 3 radiators (depending
on the device type). After a thermal
sensor has been triggered, it must be
reset manually (see maintenance
description)
on solid state relays
The solid state relay (or two solid state relays
on devices with higher power) is (are) ther-
mally protected by a bimetal switch. The
bimetal switch returns to its initial position
during the cooling process.
