KT-Elektronik SOL3-3, Installation And Owner'S Manual, Page: 50 / 88

Installation and operating manual KT-Elektronik
7 System wide functions - all system variants
7.1 Automatic summer/winter switching
Switching is done automatically on the last Sunday in March at 2:00 am and on the last
Sunday in October at 3:00 am.
Functions FS Configuration
Summer/winter switching 1 CO5 -> F08 - 1
7.2 Antifreeze
Antifreeze measures become effective once the outdoor temperature drops below the
programmed temperature threshold. The differential gap to deactivate the antifreeze
measures is 1°C.
I. Antifreeze program I (reduced antifreeze): Antifreeze measures are only initiated if all
heating circuits are running in stand-by mode. All circulation pumps are turned on by
force and their flow temperature is set to 10°C. The circulation pump for the domestic
water circuit is only turned on by force if the rotary switch is positioned at stand-by
mode for all heating circuits. However, the storage tank is always recharged to 10°C
in cases where the storage tank temperature drops below 5°C.
II. Antifreeze program II: The circulation pumps for the heating circuits are generally
turned on by force. The flow temperature set-points of all heating circuits in holding
operating mode or stand-by mode are set to +10 °C. The circulation pump for the
domestic water circuit is generally turned on. If the storage tank temperature drops
below +5 °C, the storage tank is recharged to +10 °C.
Functions FS Configuration
Antifreeze program I
3 °C
CO5 -> F09 - 0
Antifreeze threshold/ –15 to 3 °C
Antifreeze program II
3 °C
CO5 -> F09 - 1
Antifreeze threshold/ –15 to 3 °C
Minimum temperature of storage
tank 10 °C
Note: Antifreeze mode for a pump, a heating circuit or a domestic water circuit is only
active if the antifreeze symbol
is shown in the display. Antifreeze monitoring is
deactivated in stand-by mode in systems with fixed value control without outdoor
sensor.
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EB_37383_SOL3-3_EN002