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Siemens Building Technologies
Basic Documentation RVA47.320
CE1P2379E
HVAC Products
Description of the heating engineer settings
15.07.2002
The extent to which the switch-on point is shifted forward in time depends on the
number of d.h.w. heating cycles permitted in a 24-hour period (operating line 124):
0
6
12
17
24
5
h
23
79
Z2
9
16
4.37.3
Operation according to the d.h.w. time switch program
- Setting 2
For d.h.w. heating, time switch program (d.h.w.) of the local controller is taken into
account. The set switching times of that program are then used to change over
between the nominal d.h.w. setpoint (operating line 13) and the reduced d.h.w. setpoint
(operating line 120).
D.h.w. heating takes place independent of the heating circuit programs.
With this d.h.w. heating program, it is possible to have a maximum of 3 heating periods
per day. The forward shift of the switch-on times is inactive.
0
6
12
18
24
h
23
73
Z2
4
4.38
Switching program circulating pump
•
The circulating pump runs only during the selected periods of time
•
No heat losses during the periods of time when there is no demand for d.h.w.
Defines the time switch program according to which the circulating pump is switched on
and off.
1. Press the operating line selection buttons to select operating line 122.
2. Press the + / - buttons to select the required time switch program.
Setting range
Unit
Factory setting
0...1 Increment
1
Depending on the setting made, the circulating pump will be operated according to the
following time switch program:
0
For the switching program of the circulating pump, the switching program of the
controller internal heating circuit will be adopted.
1
Switching program according to the selected d.h.w. release (operating line 121).
Note
Example:
Heating periods
Example:
Benefit
Description
Setting
Effect
