Specifications

SYSTEM ASSEMBLY
41
Refer to the installation instructions supplied with the RL series TRV kit or the RLX series OTP kit for
additional information of the installation of the over temperature protection components.
1. Roof Condition: Check the condition of the roof and advise the client of any broken tiles or damaged
roof sheeting.
2. Solar Frame: If a solar frame is to be installed, determine the location of the frame. Assemble and fix
the frame to the roof, following the installation instructions provided with the frame.
Depending upon the positioning of the frame on the roof and any minor fall the roof may have, ensure
the collector rail is either horizontal or is higher on the hot outlet side of the solar collectors. If in doubt
use a spirit level.
3. Water Heater Location: Select a suitable position for the solar water heater.
Refer to “Solar Water Heater Storage Tank Location” on page 21 and “Solar Collector Location” on
page 34.
4. Position of Tank: Select the position of the solar storage tank so the front of the foot is toward the nose
of an even row of tiles or even metal roof sheet above a roof batten. The rear of the foot may be seated
over the nose of the tiles on the next row behind. Where possible, the tank should be positioned at least
three tiles from the ridge capping to prevent disturbance of the ridge.
5. Pitched Roof Installation: Determine the location of the collector angle / rail. Measure down the roof
2070 mm from the position of the foot of the solar storage tank to determine the location of the collector
angle / rail.
Hook the two collector straps to the collector angle / rail. Keep the straps towards the end of the
angle / rail.
Note: The solar collectors must be installed at an angle from the horizontal. Use a spirit level to
determine the horizontal. Ensure the end of the collector angle / rail at the right hand outlet side of the
solar collectors is between:
 12 – 15 mm (for one solar collector), or
 24 – 30 mm (for two solar collectors), or
 36 – 45 mm (for three collectors)
higher up the roof from the horizontal than the left hand end of the collector angle / rail at the inlet side of
the solar collectors.
This is to ensure there is sufficient angle rise from left to right to achieve thermosiphon operation. Failure
to adhere to this requirement may result in reduced solar performance from the solar water heater.
If the roof material is not even where the collectors are to be installed, then it may be necessary to add
10 mm for each collector in the array to the above distances. It is important that the solar hot outlet is the
highest point in the collector waterway so the system functions efficiently.
Tile Roof: Remove the tiles on the next row above the position of the collector angle / rail to expose the
rafters. Ensure the collector angle / rail is at the correct angle from the horizontal. Once in position, fix
the collector straps to the rafters, using suitable screws or anchors. Replace the tiles.
Metal Roof: Ensure the collector angle / rail is at the correct angle from the horizontal. Once in position,
fix the collector straps to the rafters, through the metal roofing material, using suitable screws or
anchors. Care should be taken not to mark Colorbond
®
or other metal roof sheet with a marking pen and
to remove all swarf from the metal roof as these can cause deterioration of the metal roofing material.
Note: Fixings must penetrate only through the high point in the roof material profile.