15
Connection Information
In any solar panel system, the ‘return’ refers to the intake in the collector where
liquid is returning to be reheated. The ‘flow’ refers to the collector side where the
liquid is flowing to the heat exchanger.
Note: It is essential that the collector temperature sensor is located in the flow of the
collector.
Types of Connections
The only pipes which should be used with a solar installation are copper pipe,
continuous flexible stainless steel or mild steel.
When using copper pipe, only compression or brazed joints can be used. Solder
and galvanised fittings will not withstand high temperature or expansion and are
therefore not suitable for solar pipe work.
PEX / PLASTIC / PEX-ALU-PEX or GALVANISED TUBING OR FITTINGS SHOULD
NOT
BE USED UNDER ANY CIRCUMSTANCES
Flexible Pipe Connections
Flexible pipe connections are recommended to connect the manifold through the
building fabric and allow flexibility in connecting to the internal pipe work.
Flexible stainless steel pipes are available in both a 15mm and 22mm diameter. If
connecting one diameter pipe to another, a suitable reducer compression fitting is
recommended to make the connection.
Insulation
All pipe work on the solar loop should be insulated with high temperature insulation
(such as HT/Armaflex from Armacell GmbH). High temperature insulation is essential
as standard pipe insulation will melt at temperatures experienced by solar pipes.
The wall thickness of the insulation should be equal to the diameter of the pipe. The
only pipes which should not be insulated are the pipes to the safety vessels as they
should allow heat to dissipate when the system is experiencing excessive heat and
pressure.
Summary of Contents for Varisol DF
Page 1: ...Installation Manual ...
