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Siemens Building Technologies Basic Dokumentation RVA63.280, RVA53.280 CE1P2374E
Landis & Staefa Division 19.04.2001
3.15 Frost protection for the plant
The plant is protected against freeze-ups.
When the function is activated, the heating will automatically be switched on if there is a
risk of frost, thus preventing freeze-ups.
Prerequisite for this function is that the plant operates properly!
Setting range Unit Factory setting
0/1 - 1
The plant will be protected by activating the pumps.
Entry:
0 Frost protection for the plant OFF
Function deactivated
1 Frost protection for the plant ON
Function activated
3.15.1 Frost protection for the plant
The heating circuit pump will be switched on as a function of the actual outside
temperature, even if there is no demand for heat.
Outside temperature Pump Diagram
...-4 °C Continuously ON ON
-5...1.5 °C ON for 10 minutes at 6-hour intervals takt
1.5 °C... Continuously OFF OFF
Between -4...-5°C, different statuses can occur. In that range, it is important which
situation had existed before:
If the temperature was previously higher (in the range of "takt“), the pump is switched
on / off also in the range -4 to -5 °C and is continuously running only when the outside
temperature is lower
If the temperature was previously lower (in the range of "ON“), the pump is continuously
running also in the range up to -4 °C and is switched on / off only when the outside
temperature is higher
-2
2371Z30
TA °C
OFF
01234-3-4-5-6 -1
takt
ON
Benefit
Description
Important
Setting
Effect
Exception
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