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Siemens Building Technologies
Data sheet RMH760
CE1N3131en
HVAC Products
03.07.2003
Boiler temperature control requires the RMZ781 boiler module. There are three
choices:
Pump in the flow:
Boiler pump in the bypass:
G1
G2
31
31
S
03
B2
M2
B7
31
31
S
04
B2
M2 B7
B2 Boiler temperature sensor
B7 Return temperature sensor
(optional, for minimum limitation)
M1 Boiler pump or system pump
(can be a twin pump)
M2 Bypass pump (can be a twin
pump)
In plants with maintained boiler return temperature with own mixing valve, the following
types of modules are required, in addition to the controller:
•
Heating circuit module RMZ782; it controls the boiler return temperature via a mixing
valve, depending on the temperature acquired with B1. The module also controls
boiler pump M1
•
Boiler module RMZ781; this module controls the boiler temperature depending on
the temperature acquired with B2, and also controls system pump M2
One of the basic types 4–… must be selected on the controller.
G3
31
31
S
41
M2
RMZ782
RMZ781
B2
B1
M1
Y1
Y2
B1 Boiler return temperature sensor (controlled variable)
B2 Boiler temperature sensor
M1 Boiler pump (can be a twin pump)
M2 System pump (can be a twin pump)
Y1 Mixing
valve
Y2 Balancing valve
DHW heating requires the RMZ783 DHW module. There are 5 choices:
DHW1
DHW2
31
31
S
34
M4
B41
B4
E7
M3
E7
31
31
S
35
M3
M4
B41
B4
Y5
B3
DHW3
DHW4
31
31
S
36
M3
M4
B3
Y5
E7
B41
B4
31
31
S
37
M3
M4
B3
Y4
B41
M5
B31
E7
B4
Boiler temperature control
Maintained boiler return
temperature
DHW heating
