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Siemens Building Technologies
Basic Documentation RVP540 / RVP550
CE1P2488en
HVAC Products
Description of the EXP settings
18.10.2002
Protection for the collector pump
5.25 Evaporation temperature of heat conducting
medium
•
Protects the collector pump(s) against damage caused by overtemperature and
cavitation
The evaporation temperature of the heat conducting medium (mixture) depends on the
type and amount of anti-freeze agent added.
The latest point in time when the circulating pump must be deactivated is when the
evaporation temperature is reached, to ensure no damage will occur. The temperature
at which the pump shall be deactivated can be set on this operating line.
Setting range
Unit
Factory setting
--- / 80...350
°C
- - -
"---" means that the function is deactivated.
If the collector temperature (sensor B6 or B61) exceeds the adjusted value, the associ-
ated pump(s) will be deactivated.
The pump(s) will be released again only when the collector temperature has dropped
one switching differential (operating line 311
EXP
) below the temperature set here.
5.26 Switching differential to evaporation
temperature of heat conducting medium
The switching differential is used to again release the collector pump after the collector
temperature has sufficiently dropped below the evaporation temperature.
Setting range
Unit
Factory setting
1...50 K
15
When the collector temperature falls by one switching differential below the value adju-
sted on operating line 310
EXP
, the relevant pump will be released again.
2392Z56
B6 / B61
P
°C
t
P
Release of the associated pumps (Q5, K12, Q16, K8, K18)
Benefit
Description
Setting
Effect
Description
Setting
Effect
