Wiring Connections - Trane BAYECON300 Series Installation Instructions Manual

0-100% down flow dry bulb economizer foundation packaged cooling and gas/electric

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Minimum Position Setting

To adjust the minimum position setting and check out the

economizer, the power must be connected.

Close the unit disconnect and place the zone sensor fan

selector in the fan "ON" position and the heat/cool selector

in the "OFF" position. This will place the damper in the

minimum ventilation position.

To adjust the minimum position setting for the required

ventilation air, turn the potentiometer (on the ECA)

clockwise to "open" (to increase the amount of ventilation)

or counterclockwise to "close" (to decrease the amount of

ventilation). The damper will open to this setting each time

the blower circuit is energized.

When adjusting minimum position, the damper may move

to the new setting in several small steps. Once the damper

has remained in position for 10 - 15 seconds without

movement, it can be assumed it is at the new position.

Replace the filter access panel.

The damper will close when the blower circuit is de-

energized.

Dry Bulb Settings

Standard economizer dry bulb changeover is field

selectable to 5 outdoor temperatures. See

potentiometer settings.The selection is made on the ECA.

Reference Enthalpy Settings

Economizer enthalpy changeover is field selectable to 5

points. See

Table 1

for potentiometer settings. The

selection is made on the ECA.

Table 1.

Potentiometer settings

Potentiometer

Setting

Dry Bulb

73ºF (22.8ºC)

70ºF (21.1ºC)

(a)

67ºF (19.4ºC)

63ºF (17.2ºC)

55ºF (12.8ºC)

(a) Factory Setting

ACC-SVN155D-EN

Table 2.

Dry Bulb (standard)

Reference Enthalpy

Comparative Enthalpy

(a) Economizing is enabled when these conditions are met.

(b) Conditions level will be self configured when optional sensors are con-