Plum ecoMAX920P1-S TOUCH, Installation And Operating Manual, Page: 32 / 48

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temperature in mixer circuit is maximum (in
the controller it is position 100% ON) and
the valve position where mixer circuit
temperature is minimum (in the controller it
is position 0% OFF). Remember the position
for further verification of proper connection,
- disconnect electrical power of the
controller,
- connect electronically mixer servomotor
with the controller accordingly to the
electrical
scheme and manufacturer
documentation of the valve servomotor. Do
not mix the direction of opening with closing,
- connect the electrical power of the
controller and switch controller into ready
mode (the controller in Controller off” mode),
- check whether mixer opening ang closing
cables are not switched, to do so enter
Inputs test and open mixer by selecting
Mixer 1 Opening = ON. When opening the
servomotor the temperature on mixer sensor
should increase. If not, switch off the
electrical power of the controller and switch
the cables (attention, the other cause might
be falsely mechanically connected valve! –
check in valve manufacturer’s documentation
if it is correctly connected),
- set other mixer parameters.
Description of calibration of valve
position indicator.
For mixer 1 after some time it will calibrate
automatically. In order for the valve position
indicator to show the correct value more
quickly, disconnect the electrical power from
the controller, then switch manual control on
servomotor’s housing. Turn the valve plug to
the fully closed position, then switch back the
switch on servomotor’s housing to AUTO.
Switch on the controller’s power – %
indicator of valve opening has been
calibrated. Attention: in mixers 2,3,4,5 the
calibration is automatic after switching on
the mains power. In case of these mixers
wait until % indicator of valve opening is
calibrated. During calibration the servomotor
is closed by the Valve opening time.
12.17
Circulation pump connection
Circulation pump may be connected to the
boiler’s controller only after buying extension
executive module C.
12.18
Connecting STB temperature
limiter
In case of exceeding water temperature in
the boiler over 95°C the electrical power of
the feeder and airflow fan is shut off by
temperature safety limiter. Again switch on
requires limiter to reset. To do so, unscrew
the nut (1) covering the reset button (2) and
press the button.
Resetting STB temperature limiter: 1 – covering nut, 2 –
reset button
.
The button can be pressed only after water
temperature in the boiler drops. Fan and
feeder power will be brought back. If the
controller is not factory equipped with the
temperature safety limiter, then it should be
connected to terminals 1-2 of the controller
as an external device.
The STB temperature safety
limiter must have rated voltage of
at least 230 VAC and should have
valid approvals.
There is a hazardous voltage on
terminals 1-2!
In case of not installing the limiter terminals
1-2 are to be connected by a bridge. The
bridge must be made with insulated wire,
with diameter at least 0,75 mm
2 . With
insulation which is thick enough to meet
safety standards of the boiler.
Regulations require using STB
limiter.
12.19 Connecting room panel
The controller can be equipped with
ecoSTER200 or ecoSTER TOUCH room panel,
that can serve as: room thermostat, panel
controlling boiler, alarm signaling, fuel level
indicator.