Mode Of Operation; Settings - Siemens RVD110 Basic Documentation

Siemens Building Technologies
HVAC Products
N1
B9
Y1
M
B7
Y7
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 Function, parameter
line
51 Plant type no.
55 Return from the d.h.w. circulating
pump
106 D.h.w. priority
107 Pump overrun time
111 Actuator opening time
112 Actuator closing time
113 P-band of control
114 Integral action time of control
Basic Documentation RVD110, RVD130
14 Function block D.h.w. heating
A6
B1
Q1
Q7
B71
Setting
6
Any
Any
Must be 0
Any
Any
Any
Any
Explanation
Control outputs Y5 / Y6
and Q3 are not used
Control outputs Y5 / Y6
are not used
51/94
CE1P2381E
27.05.2004