Connect Heat Pump C To The Heating System - IVT Greenline HT Plus C Assembly, Commissioning And Maintenance Manual

Connect heat pump C to the heating system

Application: The principle is based on fl oating condensing in the heat pump (curve control) and additional heat from the
electric cassette. The built-in control unit controls the heat pump using the outdoor sensor T2 (GT2) and the return sensor
T1 (GT1) according to the outdoor compensated control curve. When the heat pump is unable to meet the heating require-
ments, the electric cassette starts automatically and together with the heat pump provides the required temperature. The
heating of hot water is given priority over the heating of the heating water. Hot water heating is controlled by the sensor T3
(GT3), which is located in the hot water cylinder. When the water in the cylinder is heated, a three-way valve temporarily
disconnects heating radiator mode. When the water in the cylinder reaches the required temperature, heat is once more
supplied to the heating system.
Connecting the sensors: External sensors T1 (GT1) and T2 (GT2) must always be connected.
An absolute prerequisite for the connection is that a minimum fl ow of at least 70% of the nominal fl ow can be
maintained throughout the year.
* If a bypass is used and an external circulation pump is fi tted, the fl ow over the heating system can be reduced by 40% of
the nominal fl ow of the heat pump. Ensure that the larger section of the thermostat valves is fully open. Otherwise a an
accumulator tank of at least 100 litres in capacity must be fi tted. The bypass length must be at least ten times that of
the pipe's inner dimension.
*
*
Symbols according to ISO/FDIS 14617.
Letter codes according to IEC 61346-2.
This is a principal drawing.
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Connecting the heat pump to the heating system
Heating system
C11: Expansion tank
F21: Safety valve
F31: Safety valve
G2 (P2): Heat carrier pump
G3 (P3): Heat transfer fl uid pump
V21: Filter Heating system
V31: Filter Heat transfer fl uid in
V40: Hot water
W40: Cold water