Realisation Of Solar Circuit Piping - Vaillant VIH S GB 210/2 S Manual

6.2.3 Realisation of solar circuit piping

Danger!
a
Risk of death from electric shock!
Incorrect installation or a faulty power
cable can result in a supply voltage on the
pipes, which can cause personal injury.
> Attach earthing pipe clamps to the pipes
and connect the earthing pipe clamps to
a potential equalisation bar using 16 mm
cable.
Caution!
b
Risk of damage to electronics resulting
from lightning strikes!
Without potential equalisation, lightning
can destroy the electronics in the solar
heating system, heating system, or building.
> Earth the solar circuit in accordance with
the requirements of "BS 7671 IEE Wiring
Regulations". Attach earthing pipe
clamps to the solar circuit pipes, for
instance, and connect the earthing pipe
clamps to a potential equalisation bar
using 16 mm
> Connect the collectors to an existing buil-
ding lightning protection system.
Caution!
b
Risk of damage to the collectors due
to excessive pressure.
The safety devices in the solar circuit can
be knocked out of operation if you install a
two port motorised valve in the pipes of the
solar heating system.
> Never install a two port motorised valve
in the pipes of the solar heating system.
Observe the following points to ensure perfect operation
with maximum energy utilisation:
> Ensure that the piping diameter is not too large, since
this could result in low flow velocities in the solar hea-
ting system; this makes the system less efficient.
> Design all system components to ensure an even flow
rate with the required nominal flow rate.
> Ensure sufficient heat protection for the pipes so that
not too much heat energy is lost before it reaches the
consumers. For pipes laid outside, choose weather- and
UV-resistant insulation and insulation which is resistant
to the pecking of birds.
> Vent the system completely for commissioning and main-
tenance, since air in the system significantly impairs its
efficiency.
Instructions on commissioning, maintenance, and troubleshooting for auroSTOR 0020111119_02
2
cable.
2
Installation 6
25