Supply air battery
The supply air coil is connected in parallel with the radi-
ator circuit and heats the house’s supply air. The water
flow through the supply air battery is set by means of a
trim valve (RN1). The supply air temperature must be
approximately the same as the indoor temperature,
preferably a few degrees lower.
TIP
If possible, choose a cold day to adjust the trim
valve.
Installation alternative
F470 can be installed in several different ways, some of
which are shown below.
Further option information is available at www.nibe.eu
and in the respective assembly instructions for the ac-
cessories used. See page 56 for a list of the accessories
that can be used with F470.
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 with immersion heater
If it is possible to use a water heater with an immersion
heater, NIBE COMPACT or EMINENT type water heaters
can be used.
If the valve connector is to be installed externally, moved
out or separated, it must be replaced with a separable
connector Ø 22 mm.
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 a freestanding water heater.
Two or more climate systems
When more than one climate system is to be heated, the
following connection can be used.
The ECS 40/ECS 41 accessory is required for this connec-
tion.
19Chapter 4 | Pipe and ventilation connectionsNIBE F470
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