Specifications

COMMISSIONING
48
PRE-COMMISSIONING WARNINGS
It is recommended to conduct the solar circuit commissioning procedure with the solar collector covered,
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 collector. 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 cold and solar hot pipe
work to ensure:
 there is a continuous fall from the solar collector 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 collector is not exceeded.
Rectify the solar pipe work if there is either insufficient fall or not a continuous fall of at least 5° from
the solar collector 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 “Pipe Lengths” on page 34.
The solar collector 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 collector has 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.