oventrop Regusol Installation And Operating Instructions For The Specialised Installer page 7

WARNING
Before starting work, make sure that the
pipework and components have cooled
down and been drained.
Before work commences, please ensure
that all electrical components (controllers,
pumps, etc.) are disconnected from the
power supply
The solar station always has to be installed at a lower
level than the collectors so that no steam may
penetrate the expansion tank if stagnation occurs.
If the expansion tank is installed at the same or a
higher level than the solar station, a thermal insulation
loop is required.
The installation has to be flushed with fresh water
after each draining operation.
The solar station is not suitable for direct contact with
swimming pool water or solvents.
6.1 Safety valve
The following points must be observed during
installation of the discharge pipe:
– The discharge pipe has to be laid with a decline.
− The size of the discharge pipe has to be identical
to the outlet size of the diaphragm safety valve.
− The discharge pipe should not feature more than
two elbows and a length of 2 m should not be
exceeded.
− The discharge pipe has to be laid so that a back
pressure is avoided when the safety valve opens.
− The discharge pipe must not be laid in the open,
and the discharge must be freely accessible and
controllable.
− Escaping heat transfer liquid must be drained
without risk.
− If the discharge pipe ends above a draining funnel,
the diameter of the outlet of the draining funnel
must be twice the size of the valve entry.
6.2 Use of high-efficiency pumps
Europe's leading manufacturers of heating
pumps have agreed on a uniform rating of
energy consumption. The energy label is
comparable with that of refrigerators and
other house-hold appliances. The latest
high-efficiency pumps (ECM technology,
synchronous
magnetic rotor) have a class A rating. The
efficiency of these pumps is twice that of
classic pumps (asynchronous motors).
The pump speed (pump capacity) is
automatically adapted to the requirements.
As a result, the energy consumption can
be reduced by 80%.
NOTICE
A modification of the thermal insulation is
not permissible The pump motor must not
be covered
motor with permanent
Important information on the replacement/
connection of controllers and speed controlled
high-efficiency pumps
In addition to the power supply cable (230 V), speed
controlled high-efficiency pumps call for a separate
cable for the transmission of the control signal. The
most common control signals are 0-10 V and pulse-
width modulated signals (PWM) of proportional and
inverted type.
The type of signal is specified in the operating
instructions of the corresponding pump If the control
signals of the controller and the pump are not
coordinated, an operation is not possible.
NOTICE
To avoid malfunctions and severe damage
to installations with speed controlled high-
efficiency pumps, the following must be
observed:
– The pump must only be replaced with a
pump with identical control signal
− The controller must only be replaced with
a controller with identical control signal
− When combining a pump and a
controller with different control signals,
operating safety is no longer guaranteed.
Wrong control signals may cause
damage to the installation and endanger
health
− The following functional test has to be
carried out when putting the controller
or pump into operation and when
replacing them:
1. Switch pump to "ON" in the manual
menu (relay test) –the pump is in
operation now.
2. Now switch the pump to "OFF" in the
manual menu – the pump is no longer
in operation.
– Work on electrical installations must only
be carried out by a qualified electrician.
− Always disconnect the power supply
before starting work on electrical
components.
− If not stated otherwise, all work and
settings must only be carried out by a
trained tradesman.
− Under working
efficiency pumps are almost silent.
Malfunctions caused by airlocks could
be confounded with a pump defect. This
has to be taken into account when
carrying out the functional test
conditions, high-
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