Installation manual
INSTALLATION SECTION 3
SOLAR COLLECTORS
PLEASE REFER TO FULL INSTALLATION INSTRUCTIONS REGARDING
APPROPRIATE COLLECTORS AND MOUNTING EQUIPMENT.
The collectors should be only fitted by suitably trained/qualified installers. Collectors are
usually located at height and therefore must be installed by competent persons. Collectors
will be fitted on a variety of roof types. Incorrect installation of the collectors or incorrect
assement of the roof could lead to damage of the collectors, damage to the roof which could
lead to severe damage to the building and potential physical injury.
The collectors should be installed at the optimum angle and direction for solar collection,
advice can be obtained from Andrews Water Heaters.
To minimise the requirement for roof access, all roof height equipment is limited. There is no
requirement at high level for vent valves or automatic air vents.
The designed system will usually require several collectors arranged in series.
Fittings are provided on each collector for series connection (see Fig. 3).
If more than six glazed flat plate collectors are required, the extra collector can be installed (if
the pressure drop allows) in series with the others utilising an expansion piece between the
6
th
and 7
th
collectors.
The collectors can be installed in series, in parallel or most commonly a set of panels in series
set out in parallel circuit. The decision to decide whether the panels are to be fitted in parallel
will depend upon pressure drop, performance and location. Which ever type is chosen
consideration must be given to the location of the temperature sensor (see Fig 3.).
PRESSURE DROP
The amount of collectors in series is limited by the potential pressure drop (see technical
section) and thermal expansion within the collector headers.
Simply introducing a parallel circuit into a system could reduce the pressure drop through the
collectors significantly.
Refer to the pressure drop curve in the technical specification.
GENERAL
COLLECTORS IN
SERIES/PARALLEL
11