Chapter 2: Installation
26
Phason
AC-powered actuators
DC-powered actuators
Connecting curtain machines
Curtains are usually controlled by equipment called curtain machines (sometimes referred to as
winches). Curtains are opened and closed to let in more air or less air. The idea is more air cools the
building. You can connect up to six curtain machines to the Supra. Each curtain machine you
connect requires two relays: one for opening the curtain, and one for closing the curtain.
Supra relay ratings
: 10 A at 120/230 VAC, general-purpose (resistive)
1/3 HP at 120 VAC, 1/2 HP at 230 VAC
360 W tungsten at 120 VAC
If you are connecting equipment that exceeds the relay ratings, you must install a
power contactor. For more information, read
Using power contactors to increase the
Appendix D: Installation worksheet
on page 123 and
on page 125 when installing curtain machines.
Follow these instructions to connect curtains that are
not
controlled by actuators.
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