Function D14-D40, Oil-Fired Boiler, Radiators And Coil Tank (Outline Diagram) - IVT Greenline D14 Manual To Installation, Commissioning And Maintenance

Function D14-D40, oil-fired boiler, radiators and coil tank
Overview
The radiators are first heated by the heat pump, which creates the required temperature through intermittent opera-
tion (liquid condensation). If the heat pump is not sufficient the oil-fired boiler provides supplementary heat.
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 the heat pump hysteresis to be
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. Then the heat
pump must work at least 20 minutes to the radiators or until the heating demand is met.
Oil-fired 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 oil-fired boiler is activated.
When the oil-fired boiler has been on for 30 minutes and TT1 falls below the set temperature, the mixing valve SV1
opens from shut to fully open in twenty minutes. If TT1 falls below the set temperature, SV1 closes from fully open to
closed in 3 minutes. The oil-fired boiler is blocked again when SV1 has not opened anything for 60 minutes.
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 radiators
Distance
10x
pipe
diameter
Filling
To heat source
PLEASE NOTE: This is a sketched outline Symbols in accordance with SS-En 1861
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