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6.4.2.2 Hot water coil heating
Heating with a hot water coil is controlled by means of a water modulating valve. The controller manages
opening of the valve within its corresponding differential (DHWV).
The max. valve opening value is determined by an offset (OfsHWV) against the winter operating setpoint
(SpH). In this way it is possible to manage the coil as the main air heating component or as an additional
component to the compressors or electric heaters.
6.4.2.3 Heating with a gas-fuelled generator
Gas-fuelled generators, where fitted, are modulating type, so they are managed as illustrated above for the
modulating valve in the hot water coil. The output signal from the controller and the adjustment parameters
are the same as the hot water valve.
The generator is supplied with an independent controller that is used to manage its start-up, stop and safety
devices.
6.4.2.4 Heating with electric heaters
Alternatively or complimentary to the compressors and the hot water coil, the controller can manage up to two
groups of electric heaters.
As already explained about management of water coil opening, the heaters too are started within the
corresponding differential (DEH) and they are fully activated as soon as the offset value (OfsEH) against the
winter setpoint (SpH) is achieved.