Frequently Asked Questions - Kingspan AEROMAX PLUS AIR SOURCE HEAT PUMP PACKAGE Homeowner's Manual

AEROMAX PLUS AIR SOURCE HEAT PUMP PACKAGE
KINGSPAN HEAT PUMPS
FREQUENTLY ASKED
QUESTIONS
1. MY HEAT PUMP IS RUNNING BUT THE RADIATORS ARE ONLY LUKE WARM. WHY?
Heat pumps can only supply maximum temperatures of 55 - 60°C to the heating system.
This is much lower than the 70 - 80°C supplied by a fossil fuel boiler. Therefore, the
radiators will feel cooler. Also, the heat pump is usually programmed with a climatic
curve that reduces the output temperature as the outside air becomes warmer. This
reduces energy consumption but will also result in radiators only feeling luke warm if it is
warm outside.
2. I HAVE UNDERFLOOR HEATING. WHY DOES IT TAKE SO LONG TO WARM UP?
Underfloor heating is ideal for heat pumps as it works at lower temperatures than
radiators and this improves the efficiency of the heat pump. However, it is important
to understand the differences between underfloor heating and radiators. Underfloor
heating is a 'radiant' heating system. It works by heating up a large mass of concrete
under the floor and this then 'radiates' heat to the room above. Heating a large mass of
concrete can take a long time but when it is warm it can supply heat for several hours
and only needs topped up. Therefore, underfloor heating should not be turned off for
long periods.
3. THE FANS ARE RUNNING ON MY HEAT PUMP BUT STEAM OR SMOKE SEEMS TO
BE COMING OUT. WHY?
When the heat pump is running it draws in air over the evaporator coils and removes
energy from this air. This means that the exhaust air blown out by the fans is colder than
the surrounding air. When this cold dry air comes into contact with relatively warmer
moist air then depending on the air temperature condensation may be formed. This
condensation will give the appearance of smoke or steam coming out from the fans.
4. THE FANS ARE NOT RUNNING BUT MY HEAT PUMP IS ON AND A LOT OF WATER
AND STEAM IS COMING OUT. WHY?
When the heat pump is defrosting it has to heat up the evaporator coils to melt the ice
formed on them. To perform the defrosting quickly the evaporator coils are heated to a
high temperature. This can result in some of the melt water being turned to steam. As
the ice melts quickly it will appear that a lot of water is running out.
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