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Siemens Building Technologies
Basic Documentation RVP540 / RVP550
CE1P2488en
HVAC Products
Description of the heating engineer settings
18.10.2002
Display
Unit
Factory setting
Zeile 280
EXP
... 95
°C
8
Maintained boiler return temperature is only possible with oil- / gas-fired boiler partial
diagrams using a 3-port valve (
OeG 3
and
4
) or a bypass pump (
OeG 5
and
6
).
With partial diagrams
OeG 1, 2, 7, 8
and
9
, the maintained boiler return temperature is
only possible when restricting the consumers’ demand for heat (operating line 281
EXP
).
If the return temperature drops below the adjusted value, hot flow water will be added
to the return – using the 3-port valve or the bypass pump in accordance with the partial
diagram – until the adjusted value will be reached again.
•
With
the
3-port valve,
this is accomplished by constantly adding the required
amount of water
•
With the partial diagrams with
bypass pump,
the maintained boiler return tem-
perature is ensured by switching the bypass pump on / off with a switching differ-
ential of 6 K (ON according to line 252, OFF according to line 252 + 6 K)
4.62 Actual value of return temperature B7
•
Visualization of actual value of the return temperature
The return temperature (B7) currently acquired will automatically be displayed on this
operating line.
Display
Unit
-50...350
°C
- - -
No value available
4.63 Burner hours run of stage 1 (K4 / PPS)
•
Overview of the number of burner operating hours of burner stage 1
•
Criterion for service and maintenance work
The display shows the total number of operating hours of burner stage 1 of a single- or
2-stage burner.
The number of operating hours of burner stage 1 are generated based on the signal
present at input K4 or the PPS signal.
Display
Unit
0...999‘999 h
The average number of burner operating hours of stage 1 is obtained by making the
following calculation :
258)
(line
1
stage
starts
burner
of
number
1
stage
hours
operating
burner
[h]
The number of burner hours run can also be acquired via input E1 (operating lines 880
and 877).
To reset the hours run meter to 0, press the + / - buttons simultaneously for 3 seconds.
Setting
Important
Effect
Benefit
Description
Setting
Special displays
Benefit
Description
Setting
Note
Note
Resetting
