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Siemens Building Technologies
Basic Documentation RVP540 / RVP550
CE1P2488en
HVAC Products
Description of the heating engineer settings
18.10.2002
4.163 Priority of buffer storage tank cooling with
the transfer pump
The priority of the cooling function can be selected (OFF / priority 1 / priority 2).
When the selected priority is released and the buffer storage tank is a minimum of 6 K
hotter than the d.h.w. storage tank, the heat will be carried to the d.h.w. storage tank by
means of the transfer pump (Q11 or Q3, refer to operating line 531).
Setting range
Unit
Factory setting
--- / 1...2
–
1
The transfer of heat will be stopped when the selected priority is no longer released
(refer to mode of operation on page 195), or the temperature differential between the 2
storage tanks is less than 4 K, or the d.h.w. storage tank has also reached its maximum
temperature (MSB).
4.164 Priority of buffer storage tank cooling with
the collector pump
The priority of the cooling function can be selected (OFF / priority 1 / priority 2).
As soon as the selected priority is released and the collector temperature has dropped
below the storage tank temperature by the amount of “Temperature differential ON”
(e.g. during the night or in the case of overcast skies), the heat will be released to the
environment via the solar collectors by activating the collector pump.
Setting range
Unit
Factory setting
--- / 1...2
–
1
The cooling function will be stopped when the selected priority is no longer released
(refer to “Functioning” on page 195) or the collector temperature lies less than “Tem-
perature differential OFF” below the current storage tank temperature.
“Temperature differential ON heat exchanger 1 / 2” (operating lines 329 / 331).
2 K (nonadjustable)
If the storage tank has 2 heat exchangers, the heat exchanger at the bottom will be
used for discharging.
Description
Setting
Effect
Description
Setting
Effect
Temperature differential
ON
Temperature differential
OFF
Note
