System Orientation And Inclination; Pipe And Pump Sizing - Rinnai ENDURO SP200B Operation & Installation Manual

SYSTEM ORIENTATION AND INCLINATION

The performance of any solar hot water system is determined by the way that the system is installed.
For Australian installations, solar collectors should face the equator (True North) for optimum performance.
Installing solar collectors facing up to 45 degrees from North (between North-East and North-West will reduce
efficiency by approximately 5%.
For Australian installations, the inclination of the solar collectors should be the same as the latitude of the site
for optimum performance. Inclinations within 20 degrees of the latitude of the site will reduce efficiency by
approximately 5%. Many roofs in Australia have a slope between 20° and 25° and provide an appropriately angled
mounting surface.
Installers must ensure they comply with relevant local regulations in regards to inclination and orientation.
City Latitude
Adelaide °S
35
Albany °S
35
Alice Springs °S
24
Brisbane °S
27
Broken Hill °S
31
Cairns °S
17

PIPE AND PUMP SIZING

Ensure that the combined length of the flow and return piping for each collector set is approximately
the same. This will result in even flow to all collectors and optimise performance.
NOTE
Total Collectors in array
Piping sizing for solar
flow and return manifolds
Pump
Pump Speed
Rinnai
City
Canberra
Darwin
Dubbo
Geraldton
Hobart
Mildura
Latitudes of Australian Cities
Up to 10 20
DN20 DN20 DN25
20- 20-
60N 60N 60N
Maximum pipe run in collector circuit (m)
1 30 -
2 60 40
3 100 100 100
INSTALLATION - SOLAR COLLECTORS
Latitude City
°S Melbourne
35
°S Perth
12
°S Port Hedland
32
°S Rockhampton
28
°S Sydney
42
°S Townsville
34
30 40 50 60
DN32 DN32 DN32
20- 25- 25- 25-
80N 80N 80N
- - -
20 - -
100 100 100
13
Latitude
°S
38
°S
32
°S
20
°S
24
°S
34
°S
19
70 80 90
DN40 DN40 DN40
25- 25- 25-
80N 80N 80N
- - - -
- - - -
100 100 100
DD FP Solar Pre Heat System OIM
100
DN50
25-
80N
-
-
100