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Siemens Building Technologies Basic Documentation RVD230 CE1P2383en
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 0–4…8–4
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
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 RVD230 has a total of 28 plant types preprogrammed. For detailed information,
refer to subsection 3.1.2 "Plant types"
• Plant types 0–4 through 0–10 are used exclusively for d.h.w. heating; they cannot be
used for heating circuit control or precontrol
• Plant types 1–0 and 5–0 only provide flow temperature control; they cannot be used for
d.h.w. heating
• Plant types 5–x and 6–x provide precontrol (the precontrolled flow can supply heat to a
heating circuit or any other consumers). They also control the d.h.w. temperature.
In contrast to plant types 1–x and 2–x, these types of plant control the flow temperature
not weather-compensated but demand-dependent
• Plant type 7–2 provides precontrol and controls a heating circuit and the d.h.w. circuit
• 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 devices can be an intermediate circuit pump, charging pump, circulating
pump, mixing or diverting 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 RVD230 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 tem-
perature 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
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