Specifications

TM024 Premier Loline Solar Drain back Service Instructions REV: A
D.O.I: 12/12/2007
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15. Note the level of the closed circuit fluid in the fluid level hose.
The closed circuit fluid should drain back to the original static level.
If the closed circuit fluid does not drain back completely to this level, then check:
• There is a continuous fall of at least 5° (1 in 10 grade) in the solar pipe work from
the solar collectors to the solar storage tank.
• The solar collectors have an inclination of not less than 10°.
• The connectors on the inlet and outlet of the collectors are orientated downwards
to ensure complete drain back of the closed circuit fluid from the solar collectors.
If necessary, rectify the:
• Solar pipe work if there is either insufficient fall or not a continuous fall in the pipe
work.
• Solar collector inclination if it is less than 10°.
• Orientation of the connectors downwards if they are not orientated correctly.
Recheck the drain back function of the solar circuit by repeating step 8 and
recommencing this procedure from step.
Closed Circuit Fluid Level
Note: Refer to diagrams on page 63 in conjunction with the following text.
16. Measure the distance from the text marking “MINIMUM FLUID LEVEL WITH PUMP
OPERATING” to the closed circuit fluid dynamic level marked on the side of the solar
storage tank during step 12.
The correct closed circuit fluid dynamic level for efficient operation of the system when
the pump is operating is between the “MINIMUM FLUID LEVEL WITH PUMP
OPERATING” text marking on the side of the solar storage tank and 150 mm above
this mark.
• If the closed circuit fluid dynamic level marked on the side of the solar storage tank
during step 12 is greater than 150 mm above the text marking, it will be necessary
to DRAIN closed circuit fluid from the heat exchanger.
• If the closed circuit fluid dynamic level is below the text marking, it will be
necessary to ADD water to the heat exchanger to top up the level of closed circuit
fluid.
There is sufficient closed circuit fluid concentrate in the solar circuit heat exchanger
such that only water needs to be added to the system if it is required to top up the
level of closed circuit fluid.
Note: The dynamic level of the closed circuit fluid, upon the completion of
commissioning, must not be less than the “MINIMUM FLUID LEVEL WITH PUMP
OPERATING” text marking on the side of the solar storage tank or greater than
150 mm above this mark.