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PRE-COMMISSIONING WARNINGS
It is recommended to conduct the solar circuit commissioning procedure with the solar collectors covered
with an opaque material, otherwise during the commissioning and checking procedure of the solar circuit,
the closed circuit fluid may experience solar gain as it passes through the solar collectors. This will
increase both the temperature and pressure of the closed circuit fluid and vapour inside of the solar circuit.
The electrical supply must be switched off before the solar circuit is opened either at the solar circuit relief
valve or at the compression nut on either of the solar hot or solar cold pipes at the top of the solar storage
tank.
If it is necessary to open the solar circuit at the solar circuit relief valve or at the compression nut on either
of the solar hot or solar cold pipes at the top of the solar storage tank, then care must be taken so as not
to be scalded by either the closed circuit fluid or the vapour escaping from the solar circuit.
Pre-Commissioning Notes
Before commencing the solar circuit commissioning procedure, check the solar pipe work to ensure:
there is a continuous fall from the solar collectors to the solar storage tank of a minimum 5° (1 in
10 grade).
the maximum recommended pipe length is not exceeded.
the maximum height from the base of the solar storage tank to the solar collectors is not exceeded.
Rectify the solar pipe work if there is either insufficient fall or not a continuous fall of a minimum 5°
from the solar collectors to the solar storage tank or if either of the maximum pipe length or maximum
height of the system has been exceeded, before commencing the solar circuit commissioning
procedure. Refer to
The solar collectors will gain a high level of heat during periods of solar radiation. If the solar pump is
activated during a period of high solar radiation and the solar collectors have not been covered, the initial
flow of closed circuit fluid will absorb this heat and a rumbling sound may be heard. This is normal and
the solar circuit will achieve a stable operating condition once full flow through the solar circuit is
established.
The solar pump is set on the speed setting 3. This speed setting must not be adjusted. The solar control
unit automatically controls and adjusts the speed of the pump to maximise solar contribution. Manual
adjustment of the speed dial setting may result in the system not operating correctly or efficiently.
"Pipe Lengths"
on page 35.
49
COMMISSIONING
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