8
This heater has two safety de-
vices that protect this appliance
from damage or failure:
- safety temperature limiter WT3,
that goes off (shuts off power
supply) when the temperature in
the heating compartment [1] goes
over 100
0
C. After going the safety
temperature limiter off, operation
of the appliance is not possible.
The safety temperature limiter
does not work as electric protec-
tion of the heater.
Fig.10 Construction
[1] - heating box
[2] - differential pressure switch
[3] - WT3 safety temperature lim-
iter
[4] - protection wire terminal
[5] - plugged hole for electric
wires
[5a] - hole for electric wires
[7] - back plate
[13] - orifice
[15] - fixing screws
[16] - catches
[17] - inlet pipe - cold water
[18] - outlet pipe - hot water
[19] - flow regulating valve
[XP] - electric terminal
Any interference inside the
safety temperature limiter may
cause an irreversible damage to
the water heater.
In case, the heater forces another
electric appliance to be off for its high
power intake, you need to install a
priority switch. A current relay should
be installed in a distribution board
into a wire connected to the terminal
marked "V" at WT3 [3]. While the first
heating coil is being switched on, the
current that passes through the coil
causes the electric relay to work, and
the extra circuit is opened.
10
Construction
