Siemens Building Technologies
Basic Documentation RVL470
CE1P2522E / 30.03.2000
Landis & Staefa Division
Fundamentals
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3.2.5. Plant type 5 – "Pre-control with a boiler"
B7
Pre-control with demand-compensated boiler temperature control. Two-position control
through the burner.
Heat demand signal from the data bus. No heating program.
3.2.6. Plant type 6 – "Pre-control with district heat"
B7
B71
25
2
2
S
0
6
Pre-control with a district heat connection, with demand-compensated control of the
secondary flow temperature through the valve in the primary return.
Heat demand signal from the data bus. No heating program.
A6
Room unit QAW50 or QAW70
E1
Heat generating equipment
B1
Flow / boiler temperature sensor
(boiler / heat exchanger)
B5
Room temperature sensor
E2
Load (space)
B7
Return temperature sensor (primary circuit)
LPB Data bus
B71 Return temperature sensor (secondary circuit)
M1
Heating circuit pump/circulating pump
B9
Outside sensor
N1
Controller RVL470
Y1
Heating circuit mixing valve
3.3. Plant types and function blocks
Plant type
Level
Function block
1
2
3
4
5
6
End-user 1
z z z
End-user
level
End-user 2
z z z z z z
Plant type
z z z z z z
Space heating
z z z
Three-position actuator for heating circuit
z
z z
z
Boiler
z
z
Setpoint of return temperature limitation
z
z z z z
Settings for plant type 3
z
z
Service functions and general settings
z z z z z z
Contact H2
z
z z
z
Heating en-
gineer level
Contact H2 and general displays
z z z z z z
Locking level Locking functions
z z z z z z
