Rheem Loline 271 Owner's Manual And Installation Instructions page 11

BLEEDING THE SOLAR COLLECTORS
It is necessary to purge air from the collector circuit:

When the water heater is to be turned on and the solar collectors and solar hot and solar cold pipes have
been drained.

After maintenance has been conducted on the pipe work and air has entered the system.

If the circulator appears not to be circulating water around the system.
Warning: It is important bleeding of the collector circuit be conducted early in the morning, within three
hours of sunrise, when the sun is low in the sky. The water temperature inside the solar collectors is lower as
the solar collectors would not have had a chance to gain as much heat as later in the day. Bleeding the collector
circuit at a time later than this can result in the discharge of high temperature water and in some circumstances,
high temperature steam.
To purge air from the collector circuit:

Ensure the water heater is full of water and all of the hot
taps are turned off.

Using a flat blade screwdriver, open the bleed valve (if it is
not already open) fitted adjacent to the solar hot water (from
collector) inlet of the solar storage tank (see diagram).

The mains pressure will force water to flow from the tank
and through the pipe work, expelling air from the collector
circuit through the bleed valve. This is evidenced by
spurting of water from the drain line connected to the bleed
valve.
Warning: Stand well aside of the air bleed valve drain
pipe discharge point and exercise care to avoid any
splashing of water, as water or in some circumstances
steam discharged from the solar collectors may be of a very
high temperature.

Close the bleed valve when water runs freely from the drain
line.
PRECAUTIONS
Where damage to property can occur in the event of the water heater leaking, the water heater must be
installed in a safe tray. Construction, installation and draining of a safe tray must comply with AS/NZS 3500.4
and all local codes and regulatory authority requirements.
The water heater must be maintained in accordance with the Owner's Guide and Installation Instructions. Refer
"Regular Care"
to on page 13 and to
If this water heater is to be used where an uninterrupted hot water supply is necessary for your application or
business you should ensure that you have back-up redundancy within the hot water system design. This should
ensure the continuity of hot water supply in the event that this water heater were to become inoperable for any
reason. We recommend you seek advice from your plumber or specifier about your needs and building back-
up redundancy into your hot water supply system.
"Anode Inspection and Replacement"
11
ABOUT YOUR WATER HEATER
AIR BLEED VALVE & SOLAR
NON RETURN VALVE ASSEMBLY
Solar Pumped Open Circuit
on page 17.