Heating, general
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6.4 Operating modes
• Without additional heat; the heat pump is sized so as
to cover at least 100 % of the peak output of the
house.
– This choice is not in the control, choose Mixed
additional heat at Start-up and thereafter Block
additional heat in the menu for additional heat
( Chapter 16.7).
• With electrical additional heat; the heat pump is
sized to cover less than the peak output of the house.
An additional electric heat source covers the
difference. The additional electric heat source is
controlled by a 0-10 V signal which is connected to
the mixing valve output E71.E1.Q71 on the PEL board
( Chapter 11.6.5). Otherwise, the control of the
additional electric heat source functions in the same
way as the control of the mixed additional heat
source. The mixing valve control delay should be set
to 0, since it unnecessarily extends the start delay of
the additional heat ( Chapter 16.7).
• With mixed additional heat; mixed additional heat
source which is allowed to work in parallel with the
heat pump. Connection E71.E1.Q71
( Chapter 11.6.3). The additional heat is also used
in alarm mode.
For production of extra hot water and hot water peak,
an additional electric heat source is required in the
hot water heater.
For all operating modes shall Mixed
additional heat be used.
An additional electric heat source should
always be installed in the hot water heater if
the heat pump should supply more than 2
flats.
If an oil/gas boiler is used as a mixed
additional heat source, the boiler can be
installed in such a way as to generate hot
water, extra hot water and hot water peak.
In this case, an additional electric heat
source is not required in the hot water
heater.
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