Table of Contents
Advertisement
Frost protection for the heating circuit
Frost protection for the
heating circuit in cooling
mode
Overview
Setpoints
Siemens Switzerland Ltd
HVAC Products
Frost protection for the heating circuit is always enabled and cannot be deactivated.
If, during a valid cooling request, the flow temperature falls below 5 °C, the heating
circuits are switched off. The pumps are activated again when the flow temperature
exceeds 7 °C and a fixed locking time of 5 minutes has elapsed.
During the period of time frost protection in cooling mode is active, neither a cooling nor
a heating request is delivered to the source.
6.8
Domestic hot water
The unit controls the DHW temperature according to the time
Q3
program, or constantly to the relevant setpoint. Priority of DHW
charging over space heating can be selected.
B3
The controller features a legionella function with a number of
setting choices, fighting legionella viruses both in the storage
tank and in the circulation pipe. The circulating pump is controlled
according to the selectable time program and the operating
mode.
B31
Line no.
Operating line
1610
Nominal setpoint
1612
Reduced setpoint
The DHW is controlled according to different setpoints. These setpoints are activated
depending on the selected operating mode, thus leading to the required temperature
level in the DHW storage tank.
TWWR
0
10
20
30
TWWR
Reduced DHW setpoint
TWWN
Nominal DHW setpoint
TWWmax Nominal DHW setpoint maximum
User manual RVS61.843, RVS41.813
6 The settings in detail
TWWN
TWWmax
40
50
60
70
80
90
100
°C
CE1U2355en_02
28. September 2009
105/258
Hide quick links:
Advertisement
Chapters
Table of Contents
