Electrical Connection; Energy-Saving Pumps - eta SH Installation Manual

Electrical connection

Electrical connection
Observe the national regulations and any special
regulations of local energy utilities.
Supply cable 3 x 1.5 mm² with flexible wires 230 V
Supply cable ?? x ?? mm² with flexible wires
AC / 50 Hz C13 A / L+N+PE
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A circuit breaker in the mains power input is
required.
Emergency stop switch
Emergency stop switch
As a rule, no emergency stop switch is required for
In Austria, heating systems installed in boiler
log wood boilers.
rooms must be equipped with an emergency stop
switch which may not affect the room's lighting.
The switch must be situated immediately outside
the access door and clearly marked. For boiler
rooms that are only accessible from outdoors, these
switches may also be within the boiler rooms,
immediately next to the access doors.
In Germany, a boiler room is only necessary
above 50 kW boiler output, so only then is an
emergency stop switch also required.
A single-pole emergency stop switch is integrated
into the boiler's safety chain. It only affects the
combustion air supply. The pumps continue
running to cool the boiler.
SH Montage

Energy-saving pumps

Not just for the subsidy
Many incentive programmes either demand
energy-saving pumps and hydraulic calibration
or grant extra bonuses for them. This is no
coincidence, since a single heating circuit with an
old pump uses up to 10% of the electricity in an
average four-person household.
Energy-saving pumps
For an underfloor heating system that needs a
large amount of water circulation throughout the
heating season, an electronic pump with a fixed
speed setting is sufficient.
For individual room temperature control, the pump
must react to the heating in individual rooms
being switched on or off. It needs to adjust the
amount of water and the delivery height to current
demand. Differential pressure controlled energy
saving pumps with "Energy Label A" can do that
perfectly.
The pump built into the boiler is already a highly
efficient variable-speed pump.
9
2012-11