oventrop Regusol Installation And Operating Instructions For The Specialised Installer page 14

pipe loop
(siphon)
Illustr. 6.2 System illustration
6.2 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.
6.3 Flow setting
The flow rate is set with the help of a slot screwdriver
or, as illustrated, a 4 mm Allen key. The generated
pressure is displayed at the viewing glass and can be
read off directly. The scale features two sections, one
for water (0 %) and one for a 25 % water and glycol
mixture (25 %). The flow rate is read off at the lower
edge of the float. The illustration shows a water flow
rate of 20 l/h and a flow rate of 16 l/h of the 25 %
water and glycol mixture.
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Illustr. 6.3 Flow setting
6.4 Temperature sensor
Both isolating ball valves may be equipped with a
temperature sensor by wedging it between the ball
valve and the wall bracket.
Illustr. 6.4 Wall bracket
6.5 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
household appliances. The latest high-efficiency
pumps (ECM technology, synchronous motor with
permanent 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
sensor
location