40
Function D14-D40, new electric boiler, radiators and coil tank
Heat from the heat pump
The required temperature for the heating system (TT1) is set on the heat pump as an outdoor curve.
The heat pump starts when TT1 falls below the set temperature by 2.5°C and stops when TT1 exceeds the set
temperature by 2.5°C (adjustable).
The temperature to the heating system can be controlled by either the heating system flow or return.
The best function is available when TT1 is mounted on the flow pipe, which requires that the heat pump hysteresis is
increased from 5°C to 10°C (Menu 1.4).
Hot water
If the temperature is too low in the coil tank (TT3) the mixing valve changes over to the coil tank and changes back to
the heating system when the coil tank has become warm.
The heat pump is allowed to work for max 30 minutes to the coil tank if there is a heating demand. After which the
heat pump must work at least 20 minutes to the heating system or until the heating demand is met.
Electric boiler
If the heating system temperature (TT1) falls under the set temperature by more than half hysteresis (2.5°C) of set
time (60 minutes) the electric boiler is activated.
When the electric boiler is active and TT1 falls below the set temperature, the boiler output increases from zero to full
output in 20 minutes. If TT1 exceeds the set temperature, the output is reduced from full output to zero in 3 minutes.
The electric boiler is blocked at the same time as the heat pump stops when the heating demand is met.
Summer disconnection
The heating system and circulation pump G1 (P1) stop when the outdoor temperature exceeds 18°C (between 10°C
and 30°C). The circulation pump is exercised for 3 minutes every third day.
For information regarding other controls see description of Rego 600.
To heat source
Filling
To heating system
Symbols in accordance with SS-En 1861PLEASE NOTE: This is a sketched outline
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