EXTRA HOT WATER HEATERS
The heat pump should be supplemented with an extra
water heater, if a large bath tub or other significant
consumer of hot water is installed.
Water heater without immersion heater
In water heaters without an immersion heater the water
is heated by the heat pump's compressor.
Water heater with immersion heater
If it is possible to use a water heater with an immersion
heater, connect it as illustrated below.
HOT WATER CIRCULATION (VVC)
To reduce the risk of bacterial growth in systems with
hot water circulation, the temperature of the circulating
water should not fall below 50°C. Nor should there be
any hot water pipes containing stationary water. Adjust
the hot water system so that the temperature does not
fall below 50°C at the extremities of the system.
The circulation pump for hot water circulation can be
controlled by the heat pump. The HWC return can be
connected to XL5 or a freestanding water heater. If an
electric water heater is connected after the heat pump,
the HWC return must be connected to the water heater.
EXTRA CLIMATE SYSTEM
In buildings with several climate systems that require
different supply temperatures, the accessory
ECS 40/ECS 41 can be connected. A shunt valve then
lowers the temperature to the underfloor heating sys-
tem, for example.
23Chapter 4 | Pipe and ventilation connectionsNIBE F730
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