Loading ...
Loading ...
Loading ...
Page 10
Figure 6: Minimum straight pipe distance before entrace to
Taconova unit
Figure 7: Ensure the flow rate through the Taconova is in
the same direction as the arrow
Frost protection
So long as the heat pump is connected to the mains
electrical supply the automatic antifreeze function will
prevent the water in the pipes freezing during cold
weather.
In case of a prolonged power supply failure or a
circulation pump failure the system must be drained using
the screws on the flow and return connections. When
water is idle inside the system, freezing up is very likely
to happen which could damage the system beyond
economic repair.
The installer should conduct a risk assessment to
determine the likelihood of water freezing in the heat
pump and interconnecting pipe work in the event of a
power failure during cold weather. The heating circuit
should be dosed with suitable antifreeze if heat pump
system is in a building where a power failure cannot be
detected or the occupants would be unable to drain the
system. If antifreeze is used the concentration should be
large enough to prevent freezing for the coldest local
temperature and the installer should ensure the glycol is
vented to a suitable place to prevent contamination of the
environment or sewage system in the event the pressure
relief valve activating.
Condensate
During normal operation the heat pump will remove water
vapour from the air. The condensate will run down the
evaporator into the condensate tray where it will drain out
of the unit. Defrosting takes place up to 16 times per day,
with up to 3 litres of condensed water being produced
each time.
Condensed water that forms during operation must be
drained off frost-free. The heat pump must be mounted
on a level surface to guarantee proper drainage. The
condensate should drain onto a surface such as gravel.
If the condensate is drained into a pipe, it must have a
minimum diameter of 50mm and should be fed into the
drain for rain water to ensure that large quantities of
water can be drained off.
Flushing the system
It is advisable to fit specific connections for flushing and
filling as shown in the plumbing schematics. Before
connecting the heating water system to the heat pump,
the heating system must be flushed to remove any
impurities and residue from sealants, etc. Any
accumulation of deposits in the condenser could reduce
the heat pumps performance. Do not use worn out piping
that may have become blocked over time.
Filter
It is essential to install a filter immediately before the
water inlet to the heat pump. Not installing this filter would
invalidate the warranty of the heat pump as debris can
easily block the condenser channels.
The MFK114 isolation valve as shown in Figure 8 is
included in the heat pump packages. The valve can be
closed and the filter removed and checked without having
to drain the system.
Ensure that impurities are not flushed
though the heat pump since they could
block the channels in the condenser.
The condensate must drain on to an
surface that is freely draining. It must
not drain on to footpaths or patios as it
could refreeze and become a hazard.
If the heat pump is taken out of service
or in the event of a power failure, the
system has to be drained if freezing
weather is a possibility.
Loading ...
Loading ...
Loading ...