40
Hoval STU Wood Pellet Boiler
Appendix C - Boiler Familiarisation Information
Water dump Container
Water dump thermal
valve
Clamp on burnback
thermostat.
Sleeve for water dump
thermal valve sensor.
Important:
The
sensor must be
located in this sleeve
to ensure correct
operation of the wa-
ter dump device
Removable cap
Water dump container
Boiler drain connection (two
per boiler)
Water dump thermal valve
preset to open at 95 °C
Thermal valve test
button (red)
Note: Water dump container
and thermal valve should be
removed from the delivery
auger tube and held over a
suitable container before
testing. Please ensure the
container is refilled with
water as per page 41.
STU Boiler
