TVS user manual
Phason
Heat/cool bypass switch
A -
A bypass switch may be installed so the stage can be
operated manually, turned off, or controlled
automatically by the TVS. When the switch is in the
right position the stage will be controlled
automatically. When the switch is in the center
position the stage will be off, and when the switch is
in the left position (manual position) the stage will
be fully on.
Connect a "SPDT center off" switch. This switch is
included with Phason power contactor units but can
also be ordered separately. Note: This switch is NOT a
disconnect switch.
Variable stage bypass switch
A -
A bypass switch may be installed so the fan can be
operated manually, turned off, or controlled
automatically by the TVS. When the switch is in
the upper position the fan will be controlled
automatically. When the switch is in the center
position the fan will be off, and when the switch is
in the lower position (manual position) the fan will
be on full speed.
Connect a "SPDT center off" switch. Note: This switch
is NOT a disconnect switch.
38 2009-09-15
Summary of Contents for Three Ventilation Stage Control
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