Principle; Principle Of Heating And Hot Water Control; Power Failures; Three Different Operating Modes - IVT GreenlineC Manual To Installation, Commissioning And Maintenance

Principle

Principle of heating and hot water control

Your heat pump is fitted with a Rego600 control unit to guarantee you maximum savings and many
years of service. The unit, which has advanced monitoring functions, controls the heating and hot
water in your home. This ensures that all vital functions are monitored and that, if problems arise, the
heat pump is shut down before it is damaged.
When the heat pump is not able to meet the heating requirements, additional heat is connected that
together with the heat pump provides the required temperature. The Greenline C and E series has a
built-in immersion heater that can be connected in three steps. Factory setting is 2/3 electrical output.
The additional heat only provides the output that the heat pump cannot generate and in this way can
never take over heating the house completely. When the heat pump is once more able to meet the
heating demand, the additional heat is automatically switched off. An oil-fired boiler is normally used
to provide additional heat for the Greenline D series. In which case Rego600 controls the oil-fired
boiler and the existing mixing valve.
The heat pump is connected to the heating system's return flow. The water is heated in the heat pump
and is then fed back to the heating system. While the heat pump is heating the water in the immersion
heater, the heating system is disconnected temporarily through the 3-way valve. A sensor in the hot
water cylinder makes sure that priority is always given to heating the hot water. When the water in the
cylinder reaches the required temperature, heat is once more supplied to the heating system.
Power failure
If the power supply fails, the control unit remembers all its settings and re-starts the heat pump when
the power returns.

Three different operating modes

The control unit can be used for three different operating modes: A, B and C. Please note that the C
series can only utilise operating mode A. The three operating modes are also outlined under Installer.
Operating mode A (C, D and E series)
This is the factory set operating mode based on an outdoor sensor that sends signals to the heat pump
control unit and controls it through an adjustable control curve. Water heating takes priority over
space heating. As well as operating the heat pump, Rego600 can also regulate other heat curves with a
mixing valve, e.g. through a combination of radiator and floor heating systems. An immersion heater is
used for additional heat.

Operating mode B (D series only)

Used when additional heat is from an oil-fired boiler. Operation is the same as for operating mode A.
Rego600 cannot control other heat curves in this operating mode.

Operating mode C (D series only)

Used in exceptional cases, it does not provide optimal operation for the heat pump because it always
works with a high temperature, or Fixed Temperature. This is most commonly used together with
existing electric boilers. This mode of operation is based on the existing electric boiler's heater being
kept warm by the heat pump and by utilising the existing immersion heater in the boiler.
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