Operation Of Circulating Pump During The Holiday Period - Siemens RVL481 Basic Documentation

Example 1
Siemens
Building Technologies
vides heating to the NORMAL temperature according to its heating program (independ-
ent of the operating mode) and is not in holiday mode.
The circulating pump runs with a forward shift against the times of the heating program;
this means it is affected by optimum start control.
With plant types 4–x, 5–x, and 6–x and the setting of "0" (own controller) on operating
line 121, the circulating pump never runs since these plant types have no own heating
program.
2 examples are given below to show the behavior of the circulating pump when control-
lers A, B, C and D are interconnected via data bus:
Operating line Con-
trollers
121 122
2 1 A
B
C
D
Example 2
Operating line Con-
trollers
121 122
2 1 A
B
C
D

16.3.2 Operation of circulating pump during the holiday period

During the holiday period, the circulating pump runs according to the setting made, as
shown in the following table:
Operating Operating
line 121 line 122
0 0, 1, 2, or 3
1 0, 1, 2, or 3
2 0, 1, 2, or 3
Heating and D.h.w. Controller RVL481
16 Function block "Basic settings d.h.w."
Operating Heating program, holidays Circulating
mode
06:00...18:00
07:00...23:00
07:00...22:00
03:00...22:00, HOLIDAYS
Heating program, holidays Circulating
Operating
mode
06:00:00..0.18:00, opti-
mum start control shifts
forward by 2 hours
08:00...23:00
07:00...22:00
05:00...21:00
Operation of circulating pump
Circulating pump OFF, if own controller in
holiday mode
Circulating pump OFF, if all controllers having
the same segment number are in holiday
mode
Circulating pump OFF, if all controllers in the
interconnected system are in holiday mode
pump
The circulat-
ing pump
runs from
06:00:00 to
23:00
pump
The circulat-
ing pump
runs from
04:00:00 to
23:00
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CE1P2541en
20.05.2008