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INSTALLER'S GUIDE
Installation for BAYECON086A,
BAYECON088A
Downflow Discharge
Single Enthalpy Sensor (Outdoor Air
Only)
1. Units with economizers already installed: When
installing the enthalpy sensor after the economizer
has been installed remove the economizer/filter
access panel located on the front side of the unit.
Remove the mist eliminator and retaining angle from
the economizer.
2. Remove the two screws securing the disk type
thermostat to the rear panel.
3. Disconnect the wires 182A(YL) and 183A(YL) from
the thermostat.
4. Locate bushing supplied with kit and pull wires
182A(YL) and 183A(YL) through bushing. Snap
bushing into the hole where the thermostat was
removed.
5. Connect wire 182A(YL) to S and 183A(YL) to +
terminals on the Enthalpy Sensor.
6. Using the two screws removed in step 2, mount the
Enthalpy sensor ajacent to thermostat's previous
location, Engagement holes are provided.
7. On the Control Module (Solid State Economizer Logic
Module) attached to the Economizer Motor, remove
the red resistor from terminals SR and + and discard.
See figure 4.
8
page 4
8. Remove the white resistor from between the SO
terminal and wire 182A(YL). Then install the white
resistor across the SR and + terminals
9. Install the terminal adaptor provided with the sensor
on terminal SO of the Control Module and connect
wire 182A(YL) to it.
10. Replace the economizer/filter access panel and mist
eliminator.
Installation for Differential Enthalpy
Sensing (Two Sensors)
1. Complete the procedures for installing a single
enthalpy sensor.
2. Mount the second enthalpy sensor on the bottom side
of the Return Air Bolckoff.
3. Remove the knock-out located near the front side of
the Return Air Bolckoff and insert a snap bushing.
4. Install field supplied wires through the snap bushing
from terminals S and + on the return enthalpy sensor
to the SR and + terminals on the Control Module.
5. On the Control Module attached to the Economizer
Motor, remove the white resistor from between the
SR terminal and the + terminal and discard. Then
connect the wire from S on the sensor to SR on the
Control Module and + on the sensor to + on the
Control Module.
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