CLIMATE CONTROLLER C-46 - INSTALLATION AND OPERATION MANUAL
47
10.3 Heating summer shut-off and cooling
winter shut-off
The use of the heating summer shut-off and cooling winter shut-
off features is described by a number of operation examples with
instructions how to set up the system.
The operation examples below require that the following
prerequisites are met:
• The Climate Controller C-46 is installed as a stand-alone unit
• The Pump management function is set to Internal control
mode, see section 8.9.9 Pump management, page 34
The following operation examples are described below:
• Heating mode without summer shut-off, section 10.3.1, page
47
• Heating mode with summer shut-off, section 10.3.2, page 47
• Cooling mode without winter shut-off, section 10.3.3, page
48
• Cooling mode with winter shut-off, section 10.3.4, page 48
• Heating and cooling mode without season shut-offs, section
10.3.5, page 49
• Heating and cooling mode witht season shut-offs, section
10.3.6, page 49
10.3.1 Heating mode without summer shut-off
The diagram in the figure below, labelled Heating mode
without summer shut-off, illustrates an operation example
with the following setup:
• Operating mode is set to heating, see section 8.9.1 Operating
mode (select), page 31
• Summer shut-off is not defined
Period P1: During this period, which covers the full year, the
circulation pump is running continuously.
10.3.2 Heating mode with summer shut-off
The diagram in the figure below, labelled Heating mode with
summer shut-off, illustrates an operation example with the
following setup:
• Operating mode is set to heating, see section 8.9.1 Operating
mode (select), page 31
• Summer shut-off is set up for the warmer period of the year.
See section Summer shut-off, page 26 for instructions on
how to define the shut-off period.
Period P1: During this period, which in this example covers the
months September to March, the circulation pump is running
continuously.
Period P2, summer shut-off: During this period, which in this
example covers the months April to August, the following scheme
applies:
1. When the period P2 starts, the circulation pump is running
continuously.
2. When all conditions for summer shut-off are met, the mixing
valve closes and the circulation pump stops.
Shut-off conditions:
• The summer shut-off date is passed, for example 1 April.
• The outdoor temperature has risen above the heating
deactivation limit, for example 18°C
• The delay period for the deactivation temperature has
expired, for example 24 hours
3. In case there is a brief period with colder weather during the
summer shut-off period, the system automatically turns on
again with heating supplied and circulation pump running.
Turn-on conditions:
• The outdoor temperature has fallen below the heating
activation limit, in this example 17°C
Note that the system uses a temperature hysteresis of
1°C between activation (for example 17°C) and
deactivation (for example 18°C)
• The delay period for the activation temperature has
expired, in this example 24 hours
4. The system will shut off again when conditions are met as
described in step 2. above.
5. When the end date of the summer shut-off period is passed,
the system turns on again when the turn-on conditions are
met, see step 3. above.
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