SYSTEM ASSEMBLY
55
Asbestos Roofs
All Occupational Health and Safety matters / procedures must be adhered to in relation to asbestos material.
If safety procedures are not adhered to then terminal illness may result from the handling of asbestos.
Care needs to be taken when fixing straps to asbestos roofs. It is suggested that longer Tek screws are used
to fit securely into purlins.
Pitch roofs - Greater than 30°
The solar water heater must not be installed on a roof with a pitch greater than 45°.
For installations on a roof with a pitch between 30° and 45°, the water heater is to be installed on a With Pitch
frame.
INSTALLATION CHECK LIST
Once the installation is completed and before the tank is full of water and the collector circuit is full of heating
fluid, it is IMPORTANT to check the following:
• The solar hot and solar cold pipes grade downwards with a continuous fall of not less than 10° from the
solar storage tank to the solar collectors. If in doubt use a spirit level.
• On a pitched roof installation without a frame, the hot outlet side of the collector array is between
◼ 12 – 15 mm (for one solar collector), or
◼ 24 – 30 mm (for two solar collectors), or
◼ 36 – 45 mm (for three solar collectors)
higher up the roof from the horizontal than the solar cold side of the collector array. If in doubt use a spirit
level.
• On a frame installation, depending upon the positioning of the frame on the roof and any fall the roof may
have, ensure the collector mounting rail is either horizontal or is higher on the hot outlet side of the solar
collectors. If in doubt use a spirit level.
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