Metal-Fach ecoMAX860P TOUCH, Operating Manual, Page: 27 / 44

27
Connecting emission sensor: 1 – exhaust temp.
sensor type CT2S, 2 – sensor lead, 3 – flue.
Caution: Opening the boiler door
can
cause the emission
temperature to exceed the
sensor‘s thermal resistance,
which can burn the sensor out.
12.9 Checking temperature sensors
Temperature sensors CT4/CT6-P/CT2S can
be checked by measuring their resistance at
the given temperature. In the case of finding
significant differences between the value of
measured
resistance and the values
presented in the table below, the sensor
must be changed.
CT4 (KTY81)
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
150 1572,0 1573,1 1574,2
12.10 Connection of mixers room
thermostat
Room thermostat connected to the
operational unit affects mixer 1 circuit and/or
boiler circuit. If the whole heating circuit of
the building is supplied by a mixer with
electric servo, room thermostat for boiler
should be turned off.
Room thermostat, after disconnection of its
connectors reduces preset temperature of
the mixer circuit by a value set up in: Reduce
preset mixer temp. to thermostat. This
parameter is available in:
Mixer 1-4 settings
The mixer pump does not stop upon opening
contacts of the room thermostat unless other
settings have been made in the Service
Menu. Select the value of this parameter so
that once the room thermostat has
responded (its contacts have opened), the
temperature in the room drops.