Rheem 180 Owner's Manual And Installation Instructions page 48

SYSTEM ASSEMBLY
5.3 Noting the orientation of the collector strap's folded end, slide the long straight end of the collector
strap through the appropriate slot from the underside of the collector rail as shown on the left side picture
below.
Pull the collector strap through until the first bend in the strap slips into the slot in the collector rail. The
strap will engage with the collector rail as shown on the right side picture below.
Collector Rail: Determine the location of the
6.
collector 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 rail.
Note: The solar collectors must be installed at an
angle from the horizontal. This is to ensure a
sufficient angle rise across the collectors from left
to right to assist in optimum thermosiphon
operation and solar performance.
Use a spirit level to determine the horizontal.
Ensure the end of the collector rail at the hot
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 mounting rail at the inlet
side of the solar collectors.
Failure to adhere to this requirement may result in
reduced solar performance from the solar water
heater.
Rafter spacing Recommended slots
(1 x two and 1 x one collector rails)
300 mm (12")
1, 5 (long) & 3 (short)
400 mm (16")
1, 5 (long) & 3 (short)
450 mm (18")
2, 5 (long) & 4 (short)
500 mm (20")
1, 6 (long) & 4 (short)
600 mm (24")
1, 5 (long) & 3 (short)
900 mm (36")
1, 4 (long) & 4 (short)
Three collectors
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