Page 2
INSTALLER’S GUIDE
11. Connect the two (2) Mixed Air Sensor wires (pulled from harness)
to the mating pigtail wires (with Stake-Ons) from the Mixed Air
Sensor.
12. In the Control Box, complete the wiring connections per the wiring
diagram on page 5. Secure all wires with wire ties so that there
is no interference with any moving parts in the unit.
IMPORTANT - When the economizer is installed in heat
pump models (WC*), a relay accessory kit
(BAYRLAY004A) is required. Mount relay accessory kit
in unit control box as illustrated on page 6.
13. Attach the return duct to the economizer.
5. Drill three (3) 9/64” holes through the mating holes in
the top flange of economizer and into the unit. Then,
drive three (3) #10 sheet metal screws to secure the top.
6. Drill three (3) 9/64” engagement holes on each side of the
economizer. Then, drive three (3) #10 sheet metal screws
into each side of the economizer to the unit.
7.
Mount the Mixed Air sensor to the left Blower partition
using two sheetmetal screw. See Figure 4, page 4. The 2 yellow
wires will connect to the Economizer wiring harness in a later step.
Install any economizer options (enthalpy sensor or CO2 sensor)
at this time per instructions provided with the sensor.
8. Apply a gasket to the Rain Hood flanges. See Figure 2.
9. Place the Rain Hood over the horizontal return air opening
of the economizer. See Figure 2. Use the #10 sheet metal
screws provided to attach the hood to the economizer.
10.
Route the main wiring harness. From the Economizer assembly,
route the main wiring harness to the Mixed Air sensor and to the
Control Box. See Figure 3.
14. Power the economizer and run the checkout procedure on page
7. Make desired adjustments to the controller: set the minimum
occupied damper position, set the outside air (if enthalpy used),
and the IAQ sensor (if used).
15. Replace the unit Coil access panel, the Blower access panel, and the
Control Box access panel.
Figure 1. Remove Panels
TC, WC, or
YC Unit
Horizontal
Return Air
Panel
Down Flow
Return Air
Panel
Blower Access Panel
Control Box Access
Panel
Coil Access
Panel
Top Sealing
Flange
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