Pre-commissioning warnings, Commissioning – Rheem Water Heater User Manual
Page 57
COMMISSIONING
57
PRE-COMMISSIONING WARNINGS
•
It is recommended to conduct the solar circuit commissioning procedure
with the solar collectors 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 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 cold and solar hot 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
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 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.