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Siemens Building Technologies
Basic Documentation RVD110, RVD130
CE1P2381E
HVAC Products
14 Function block D.h.w. heating
27.05.2004
B1
Y1
Y7
B7
Q1
A6
B9
B71
Q7
23
81
S
0
9
N1
M
A6
Room unit
B1 Flow
temperature
sensor
B7
Primary return temperature sensor
B71 D.h.w. temperature sensor
B9 Outside
sensor
N1 Controller
Q1
Heating circuit pump
Q7 D.h.w.
circulating
pump
Y1
2-port valve for control of the heating circuit
Y7
2-port valve with electrothermal actuator for the d.h.w. circuit
14.5.2 Mode of operation
2-port valve Y7 in the d.h.w. circuit has an electrothermal actuator which is controlled
by control output Q3 / Y7. Control outputs Y5 and Y6 are not used.
The d.h.w. temperature is acquired by sensor B71. This means that maximum limitation
of the differential temperature in the heating circuit is not possible.
No thermostat may be used.
Sensor input B3 will not be used. The respective fault status message must be sup-
pressed by connecting a fixed resistor (recommendation: 1000
Ω
) to terminals B3-M.
This does not affect control output Q3 / Y7 and the frost protection function.
14.5.3 Settings
For this application, the following settings are of importance:
Operating
line
Function, parameter
Setting
Explanation
51 Plant
type
no.
6
55
Return from the d.h.w. circulating
pump
Any
Control outputs Y5 / Y6
and Q3 are not used
106 D.h.w.
priority
Any
107
Pump overrun time
Must be
0
111
Actuator opening time
Any
Control outputs Y5 / Y6
112
Actuator closing time
Any
are not used
113
P-band of control
Any
114
Integral action time of control
Any
Содержание RVD110
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