Chapter 2: Installing your PEC Plus Phason
18 2009-06-15
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 being more air cools
the building.
You can connect up to three curtain machines to your PEC Plus. Each curtain machine you connect
requires two relays: one for opening the curtain, and one for closing the curtain. The relays must be
side-by-side pairs. In other words, Relay 1 and 2, Relay 3 and 4, or Relay 5 and 6. The first relay will
be the “open relay”; the second relay will be the “close relay”.
The ratings of the equipment must not exceed the ratings of your PEC Plus’ relays.
PEC Plus 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
Refer to
Appendix D: Installation worksheet on page 84 and Appendix E:
Configuration worksheets
on page 86 when installing single-stage heating or
cooling elements.
To connect curtain machines
Connect curtain machines to your PEC Plus as shown below.
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