Siemens RVD240 - 11 Function Block Plant Configuration; Operating Lines; Parameters to be Set; Plant Type

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Siemens Building Technologies Basic documentation RVD240 CE1P2384en
HVAC Products 11 Function block Plant configuration 27.05.2004
11 Function block Plant configuration
11.1 Operating lines
Line Function, parameter Unit
Factory
setting
Range
51 Plant type 1–0 1–0...4–9
52 Function of input at terminal B71 / U1 1 0...3
54 Function of circulating pump 0 0...3
55 Function of the contact connected to terminal H5 0 0...4
56 Action of pulse input on the heating circuits 1 1...3
57 Assignment of variable speed pump control 0 0...4
58 Minimum speed of the speed-controlled pump % 50 0...variable
59 Maximum speed of the speed-controlled pump % 100 Variable ...100
60 Power factor at reduced pump speed % 85 0...100
11.2 Parameters to be set
By selecting the required plant type and by making entries regarding the
• circulating pump
• functions at terminals B71 / U1 and H5
• speed-controlled pump
all functions and settings required for the configured type of plant or the assigned oper-
ating lines will be activated. All the other operating lines will be deactivated and hidden.
11.2.1 Plant type
The type of plant is to be entered on operating line 51.
The plant types have the following features:
• The RVD240 has a total of 14 plant types preprogrammed. For detailed information,
refer to subsection 3.1.2 "Plant types"
• Plant types x–0 only provide flow temperature control in the heating circuits; d.h.w.
heating is not possible
• In terms of space heating, it is possible to have mixing or pump heating circuits
• The d.h.w. can be heated by a
− coil type storage heater
− heat exchanger
− stratification storage tank
• Actuating device can be an intermediate circuit pump, charging pump, circulating
pump or mixing valve
11.2.2 Input B71 / U1
The function of input (terminal) B71 / U1 must be selected on operating line 52. The
following choices exist:
• Setting 0:
The RVD240 interprets the connected sensor as a differential temperature sensor
• Setting 1:
The connected sensor is used in a heating or d.h.w. circuit as a return temperature
sensor. It is to be noted that when using a speed-controlled pump, sensor B71 must
always be present in the return of the respective control loop
• Setting 2:
The RVD240 can receive DC 0...10 V signals from a plant element and then pass
them on via M-bus. Plant element can be a differential pressure sensor, for instance.
The signals have no impact on the control functions of the RVD240