'10 • HM-T-149A
40
External heat source
Sun
Function
By connecting a solar heat collector via intermediate heat
exchanger to indoor unit or tank, the solar heat can produce hot
water and heating for the house.
If the solar panel does not produce necessary heat, the outdoor
unit and the imnersion heater generate heat.
The solar panel must have an external automatic control device
(KF).
Temperature sensor should be placed on BT24 and KF should
control the solar panel as follows,
P1 should stop when BT24 senses 65 °C at maximum.
P1 shouldn’t start until T1 reaches 55 °C at minimum.
V1 must control the supply temperature at 65°C or lower.
Accumulators and primary system design are dimensioned by
the boiler supplier. Ensure that there is sufficient volume to
prevent overheating.
External heat source
System description
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118
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