Plum ecoMAX920P1-S TOUCH, Installation And Operating Manual, Page: 29 / 48

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Installing the exhaust temp. sensor: 1 – exhaust temp.
sensor type CT2S, 2 – sensor lead, 3 – flue
.
Attention: Opening the boiler door
can
cause the emission
temperature to exceed the sensor‘s
thermal resistance, which can burn
the sensor out.
12.10 Temperature sensors checking
Temperature sensors can be checked by
measuring
their resistance in given
temperature. In case of big differences
between measured resistance value and
values in table below, the sensor should be
replaced with a new one.
CT4 (KTY81)
Ambient
Temp. °C
Min.
Ω
Nom.
Ω
Max.
Ω
0 802 815 828
10 874 886 898
20 950 961 972
25 990 1000 1010
30 1029 1040 1051
40 1108 1122 1136
50 1192 1209 1225
60 1278 1299 1319
70 1369 1392 1416
80 1462 1490 1518
90 1559 1591 1623
100 1659 1696 1733
CT6-P (PT1000) - weather
Temp.
°C
Min.
Ω
Nom.
Ω
Max.
Ω
-25 901,6 901.9 1000,2
-20 921,3 921.6 921,9
-10 960,6 960.9 961,2
0 999,7 1000.0 1000,3
25 1096,9 1097.3 1097,7
50 1193,4 1194.0 1194,6
100 1384,2 1385.0 1385,8
125 1478,5 1479.4 1480,3
150 1572,0 1573.1 1574,2
CT2S (Pt1000) - exhaust
Temp.
°C
Min.
Ω
Nom.
Ω
Max.
Ω
0 999,7 1000.0 1000,3
25 1096,9 1097.3 1097,7
50 1193,4 1194.0 1194,6
100 1384,2 1385.0 1385,8
125 1478,5 1479.4 1480,3
12.11 Optical sensor connection
The controller cooperates only with sensor of
type OCP. The sensor must be connected
accordingly to the electrical scheme.
Indications reading from optical flame sensor
is enabled in the menu:
Information
→
Flame
Incorrect optical sensor connection
shall not damage the controller or
sensor itself, but burner flame
detection will be false.
12.12 Mixers room thermostat
connection
Room thermostat after disconnecting wires
reduces preset temperature of the value of
reduction the preset temperature of the
mixer from the thermostat. Parameter is in
the menu:
Mixer 1-5 settings
→
Mixer room
thermostat
Parameter value should be chosen in such a
way, that after activating the room
thermostat
(opening contacts), the
temperature in the room was dropping. In
case of connecting room panel make sure,
that the parameter Thermostat selection is
properly set in the menu:
220ºC