Adaption To The Individual Requirements; Avoiding Heat Losses - Würth IVT LATENTO XXL 500 Notice De Montage

7. Adaption to individual requirements
The LATENTO XXL has primarily been designed to store free solar heat. The con-
ventional reheating should be limited to a minimum in order to store as much
solar heat as can be.
There are some tips in the following on how you can achieve this goal:
Select the storage tank temperature low enough so that it can just cover your
hot water requirements. The lower this temperature, the more can be stored
through the solar yield.
If you leave the house during the morning hours regularly, you may set the hot
water heating schedule such that there will not be an conventional reheating after
the tapping of hot water in the morning hence leaving "space" for the solar
yield. It will be in the evening only, when conventional reheating takes place if
the required temperature through solar charging should not have been reached.
The less the flow through the DHW heat exchanger, the lower the temperature
in the LATENTO XXL can be to get the same extraction volume of hot water. A
flow reduction from 20 l/min to 13 l/min will increase the extraction volume by
approx. 25 %.

8. Avoiding heat losses

You can operate the system as economic as possible also by avoiding heat-losses.
Aside from insulating all hot-water carrying pipes and fittings, there are further
measures possible to avoid heat-losses:
Circulation pipes will always cause heat-losses!
Planning the tap connections favourably, a one-family house can do without
circulation pipes.
In case circulation pipes should really be necessary, a circulation pump and a
circulation control unit should be installed. Using the circulation control, the cir-
culation pump will only be switched on if required (e.g. switch in the bathroom,
short opening of the hot water, etc.) and only when the temperature in the pipe-
lines has dropped below a defined value. In addition, the running time of the
circulation pump should be set to a very short time.
The pump operating as circulation pump should be as small as possible.
Heat-losses are caused through circulations too. By installing heat siphons into
all hot water pipes (DHW, heating and solar), the micro circulation can be
reduced.
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