Install Manual

04/03/2009 11 EI204
Step 3
Room thermostat – use only basic 4-wire, heat/cool type.
Route the standard R, W, G, Y roomstat screw functions
to the HeatChoice DECII control board top tab/screw
terminal adapters. Use wire to wire same letter
connection. (figure 5)
Step 4
Air conditioning, outdoor unit – this should be a 2-wire
hookup, typically represents the contactor coil. Connect
one wire to the top “YL” terminal and the second to a
bottom “C” terminal. Note: off-peak load control for the
air conditioner will not work if the wiring is not
connected through the HeatChoice control board.
(figure 6)
Step 5
Gas (or oil with fan center) furnace – the furnace should have a
4 or 5-wire terminal block and match the control board bottom
four terminals – R, W, G, C. (figure 7)
- The furnace may also contain a “Y” screw,
this is only needed if it is a variable speed
(DC drive) furnace, see next section.
- Depending upon furnace manufacturer, the
common may have various letter
terminology – C, B, X. “C” is 24-volt
common for this product.
Step 6
Figure 5
Figure 6
Figure 7