Atag XL75W - Page 105

105
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Standard schemes
Scheme Boiler group Distribution group
3 Single boiler or cascade One or multiple mixing zones
Name and Description ECU I/O Note
Outdoor sensor NTC4
Boiler pump (230 V) P1
Boiler pump (PWM)
PWM_P1
%RLOHUÀRZVHQVRU NTC1
Boiler return sensor NTC2
T10 MTS1
HC1 pump P_Z1
Controlled with
CLIP 3 ZONE MIX.
CLIP 3 ZONE MIX needed!
HC1 mix valve MV_Z1
+&ÀRZVHQVRU NTC_Z1
HC2 pump P_Z2
HC2 mix valve MV_Z2
+&ÀRZVHQVRU NTC_Z2
HC3 pump P_Z3
HC3 mix valve MV_Z3
+&ÀRZVHQVRU NTC_Z3
System pump* MO1_HV
Heat request zone 1 PADIN1 or EBUS2
Heat request zone 2 PADIN2 or EBUS2
Heat request zone 3 PADIN3 or EBUS2
Alarm or sanitary pump VFR1
Optional
LPG/ Room supply Fan VFR3
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as a combination of scheme 2 and scheme 3.
*System pump: optional electrical connection. To use depending on application.