CTC Union GSi 600 Series, Installation And Maintenance Manual

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8 CTC GSi 600
i
The set heating curve always takes priority. The room sensor can only increase
or decrease the heat beyond the set heating curve to a certain extent. Where
operating without a room sensor, the selected heating curve determines the
flow temperature supplied to the radiators.
The House Heating Curve
The heating curve is the central part of the product’s control system. It is the
heating curve which determines the compensated flow temperature requirements
for your property dependent upon the outdoor temperatures. It is important that
the heating curve is correctly adjusted, so that you achieve the best operation and
economy possible.
One property requires a radiator temperature of 30 °C when the outdoor
temperature is 0 °C, whilst a different property requires 40 °C. The difference
between different properties is determined by the radiator surface area, the number
of radiators and how well insulated the house is.
Adjustment of Default Values for the Heating Curve
You define the heating curve yourself for your property by setting two values in
the product control system. This is achieved by selecting the options Inclination or
Adjustment under the "Installer / Settings / Radiator system" menu. Ask your installer
to help you set these values.
It is extremely important to set the heating curve and, in some cases, unfortunately,
this process may take several weeks. The best way of doing this, upon the initial
start-up, is to select operation without any room sensor. The system then operates
using the outdoor temperature reading and the property’s heating curve only.
During the adjustment period it is important that:
• the night reduction function is not selected.
• all thermostat valves on the radiators be fully opened. (This is to find the
lowest curve for the most economical use of the heat pump).
• the outdoor temperature is not higher than +5 °C. (If the outdoor temperature
is higher when the system is installed, use the factory set curve until the
outdoor temperature falls to a suitable level).
• the radiator system is operational and correctly adjusted between different
circuits.
Your home’s heating settings