gledhill ElectraMate 2000, Инструкции по установке и обслуживанию

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Page 14
1.0 DESIGN
Heating System
General
A schematic layout of the heating system in a
typical small dwelling is shown opposite.
The heating circuit is taken from the
ElectraMate 2000 and is piped in the
conventional manner.
The ElectraMate 2000 is only suitable for a
sealed heating system. Therefore heating
circuit pipework can run at a higher level than
the appliance if required as long as suitable air
vents are provided.
If any radiators are located above the level of
the ElectraMate 2000 the system should be
designed so that gravity circulation does
not occur when the heating pump is not
running. To be certain of preventing this it is
recommended that a check valve, or valves, are
fitted on the vertical flow pipes.
The heating circuit operates on the normal
primary boiler temperatures i.e. 82°C flow and
71°C return. Therefore any traditional hot water
radiators or convectors can be used with this
system and it is recommended that they are
sized in accordance with BS EN 442.
The Grundfos 15/50 pump characteristics are
shown in 1.2 Technical Data. Approximately all
the head can be used when sizing the heating
circuit pipework.
All the recommendations with regard to
pipework systems in this manual are generally
based on the use of BS/EN Standard copper
pipework and fittings.
However, we are happy that plastic pipework
systems can be used in place of copper
internally as long as the chosen system
is recommended for use on domestic
heating systems by the manufacturer and
is installed fully in accordance with their
recommendations. We always recommend the
use of barrier pipe for these systems.
It is also essential that if an alternative pipework
material/system is chosen the manufacturer
confirms that the design criteria of the new
system is at least equivalent to the use of BS/EN
Standard copper pipework and fittings.
1.3 SYSTEM DETAILS
EM 2000
Expansion vessel
Air vent
Full bore auto bypass valve NOT REQUIRED
unless the heating system incorporates
mechanical thermostatic control valves e.g.
T.R.V's to all radiators or 2 port zone valves.
As an alternative one of the radiators can be
fitted with lockshield valves which are left
fully open, permanently.