Firmware V1.4
20.05.2021
28/113
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5.3 Air conditioning operation
The cold water generation functional unit consists of a heat exchanger, a refrigerant valve, a water pump and
the two temperature sensors "water inlet" and "water outlet".
Requirements
A functional CAN bus connection with the
The enable for cold water operation from the
The Emergency Stop, digital input 23 (terminals 94/95: "Good" state when voltage is applied), system is
running without faults.
When a higher-level BCS requests it via digital input 7 (terminals 62/63) and after a switch-on delay of 150
seconds has elapsed, the water pump starts. The speed control is activated immediately and depends on the
water inlet temperature in the heat exchanger. The setpoint for this is the "Klima Abschalttemperatur", which
can be set in LDSWin, minus 4 Kelvin.
Cold water generation (
) is an option and does not have to be present in all installations.
The prerequisite for this operating mode is that this function has been selected in the visualisation, for
details,
see figure
Visualisation in LDSWin - GCBP / LWP / air conditioning operation setpoints.