Siemens LMU54 Series Basic Documentation page 165

Note
Siemens Building Technologies
HVAC Products
1)
Following applies to these diagrams:
• The PWM pump must be powered by the continuous live wire (refer to section14.2)
• The multispeed pump must be connected according to the table in section 14.2
Legend
B1 Flow sensor
B2 Boiler flow sensor
B3 DHW sensor 1
B4 DHW sensor 2
B5 Room sensor HC1
B6 Room sensor HC2
B7 Boiler return sensor
B8 Flue gas sensor
B9 Outdoor sensor
PWM pump, mandatory
PWM pump, optional
Multispeed pump, single-speed
(no PWM pump)
Basic Documentation LMU54... / LMU64...
14 Addendum: Hydraulic diagrams BMU
Room thermostat e.g. REV
20 °C
Room controller e.g. QAA73...
Room unit (QAA70)
Heating controller (RVA)
7494h01legE
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CC1P7494en
07.11.2002