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START-UP
Before filling the installation, the manual valve drive must be
placed in manual position (MAN). After filling, and during normal
valve functioning, it must be in automatic position (AUTO).
On removable models, it automatically goes from manual to
automatic position on start-up of the electrical installation.
When there is no electrical supply, and during filling, draining
or emptying of the installation, the valve can work in manual
position (MAN), with the following result:
· The 2-way valves open.
· The 3-way valves divert the flow entering via AB through either
A or B.
SOLAR THERMAL CONTROLS
Solar Brochure EXTRA:Layout 1 19/02/2010 12:56 Page 74