86/166
Siemens Building Technologies
Basic Documentation RVA47.320
CE1P2379E
HVAC Products
Description of the heating engineer settings
15.07.2002
1. Press the operating line selection buttons to select operating line 121.
2. Press the + / – buttons to enter the required period of time during which d.h.w.
heating at the nominal setpoint shall be released.
Setting range
Unit
Factory setting
0...2 Increment
1
The setting defines the period of time during which d.h.w. heating at the nominal
setpoint is released. Outside this period of time, the reduced d.h.w. setpoint applies.
There is one exception, however, function d.h.w. push (function with no setting).
Release of d.h.w. heating to the nominal setpoint takes place when using the following
settings:
0
24 hours per day
1
According to the heating circuit time switch program)s) with forward shift
2
According to the d.h.w. time switch program of the RVA47.320
The frost protection temperature for d.h.w. is fixed at 5 °C and is always active.
4.37.1
24-hour operation -
Setting 0
The d.h.w. temperature is always maintained at the nominal d.h.w. temperature
setpoint, independent of any time switch programs (setting line 13).
0
6
12
18
24
h
23
71
Z18
4.37.2
Operation according to heating program(s) with
forward shift -
Setting 1
For d.h.w. heating, the heating circuit time switch programs of the controllers in the
selected range are taken into consideration. The selection of the range (local / segment
/ system) for which the d.h.w. is produced is made on operating line 123.
The switch-on point for the release is shifted forward in time against the earliest switch-
on point of all heating circuits. The switch-off point for the release coincides with the
last switch-off point of all heating circuits.
At the switch-on point, the controller switches from the reduced d.h.w. temperature
setpoint (operating line 120) to the nominal d.h.w. temperature setpoint (operating line
13).
At the switch-off point, the controller switches from the nominal to the reduced d.h.w.
temperature setpoint.
Setting
Effect
Note
Example:
