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Siemens Building Technologies
Basic Documentation RVP540 / RVP550
CE1P2488en
HVAC Products
Description of the heating engineer settings
18.10.2002
4.89 Temperature differential ON heat exchanger
•
Switching differential can be selected depending on the requirements
Minimum temperature differential (
Δ
T) between storage tank and collector sensor re-
quired for switching on the relevant heat exchanger.
Setting range
Unit
Factory setting
Line 330…40
Line 332…40
°C
°C
8
8
Temperature differential ON for heat exchanger 1
Temperature differential ON for heat exchanger 2
The switching differential defines the minimum temperature differential
Δ
T between
storage tank and collector sensor (B6 or B61) from which storage tank charging via the
respective heat exchanger is released.
When this temperature differential is reached, a valve – if present – is brought into the
position required for storage tank charging and the necessary pump(s) is (are) acti-
vated.
The type of storage tank sensor used for generating the temperature differentials is de-
pendent on the selected basic diagram. The assignment of the sensors to the heat ex-
changers is described on page 143.
2392Z47
TSx
K12 / K8
ON
OFF
/
/
K12
Pump of heat exchanger 1
K8
Pump of heat exchanger 2
TSx
Actual value of the solar collector temperature
when the storage tank temperature is constant
Benefit
Description
Setting
Effect
Note