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Fig. 2
Roofing felt
Joist
Fig. 3
Solarflo - Solar Thermal Domestic Hot Water System
Tanalised timber
Chipboard
Roofing felt
Tanalised
timber
Seal
2.0
Installation of solar collector
2.2
General assembly notes
These instructions relate to the installation of the Baxi
Solarflo flat plate solar collector panels onto a flat roof
using the Baxi Solarflo Flat Roof Mounting Frame.
These instructions must be followed rather than those
contained in the Baxi Solarflo On roof Flat Plate Solar
Collector Mounting Installation Guide. All other
equipment must be installed as per detailed in the
Baxi Solarflo Installation Guide.
The Flat Roof Mounting Frame may be used to mount
the Baxi Solarflo collector panels at ground level if
required. In these instances particular attention should
be paid to anchoring any mounting beams used to the
ground. Also, during use, some surfaces of the collector
panels and connecting pipework may become very hot
so consideration must be given to prevent access to
children, infirm, aged or unauthorised persons.
Use only Baxi Solarflo mounting systems. Use of other
brackets/mounting systems will invalidate the warranty and
may result in an insecure and dangerous panel installation.
It is recommended that the Bench Screws for mounting
the panel mounting framework are fixed to additional
wooden structural bearers which in turn are attached to
the roof structural members.They must never be fixed
directly to roofing laths or boarding. If suitably positioned
structural members are not available, or of a section that
may be weakened by the insertion of the Coach Screws,
additional noggins should be inserted between the
structural members.These should be at least the same
cross section as the structural member.The timber
bearers should be tanalised and typically have a minimum
section of 150mm x 75mm and be of suitable length to
accommodate the mounting frame (see Fig. 2).
The bearers should be attached to the roof with
corrosion resistant coach screws of sufficient length to
penetrate the main roof support timbers by at least
100mm.The underside of the timber bearers should be
liberally coated with melted tar or liquid bitumen before
fixing in place. At least four fixing points per bearer must
be used.The bearers should be countersunk or bored to
accept the head of the coach screws.When in place the
bearers should be covered using good quality roofing felt
and melted tar or liquid bitumen (see Fig. 3).
If mounting at ground level the timber bearers must be
anchored to the ground into concrete using suitable
corrosion resistant fixings.The timber bearers must also
be treated against long term exposure to weather
conditions.
When assembling the Mounting Frame use only
corrosion resistant fixings supplied. Holes through any
roof water-proofing materials should be sealed with an
appropriate weather resistant sealant.
7
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