Plum ecomaxx 800 R2, Assembly And Service Manual

Page: 33 / 48

33
11.17 Connection of temperature limiter
To avoid boiler overheating in case of
regulator failure, provide STB or other
appropriate safety temperature limiter.
Connect STB limiter to terminals 1-2 shown
in Fig. 25
.
Once the limiter has tripped, fan
and fuel feeder motor are OFF.
Safety temperature limiter should
be suitable to operate at rated
voltage min. 230V AC and hold
required certificates of approval.
In case the limiter is not installed- bridge the
terminals 1-2 using wire of cross-section
area of min. 1 mm
2
and with insulation
enough thick to meet safety requirements for
the
boiler.
11.18 Connection of room control panel
ecoSTER200 room control panel may be
installed. Main functions of the panel are
following:
- room thermostat (3 thermostat units),
- boiler control,
- alarm annunciator,
- fuel level indication.
4-wire connection:
Fig. 33 Wiring diagram (4 wires): 1 – ecoSTER200
room control panel, 2 – ecoMAXX800 regulator, 3 –
connecting wire, 4 sensor of room thermostat 2- type
CT7, 5 – sensor of room thermostat 3 - type CT7.