Bryant 580D User Manual download pdf (Page 16)

OPTIONS AND ACCESSORIES (cont)

ACCUSENSOR™ II

CONTROL

(036-150 Only)

MINIMUM

POSITION

OPEN

REV. B

198818A

DAMPER

CLOSED

OPEN

OUTDOOR TEMP.

°F

REV.

97-3672

CW–SETPOINTS–CCW

CONTACTS SHOWN IN HIGH ENTHALPY

RUSH AT 24VAC

3 mA MIN. AT 11 VDC

CONTACT RATINGS: 1.5A RUN, 3.5A IN

OR UNPOWERED STATE

TR1

24VAC

ENTHALPY

CONTROL

ACCUSENSOR III

SENSOR

Accusensor economizer controls help provide efficient, economical

economizer operation. Accusensor II solid-state enthalpy control in-

cludes the logic and one sensor to calculate both dry- and wet-bulb of

the outdoor air to provide an accurate enthalpy reading on 036-150

units. It then decides when to energize the economizer based on this

reading. The 180-300 unit economizer provides the decision-making

function internally, and requires one Accusensor III sensor for solid-state

enthalpy sensing. A second Accusensor III sensor (required for all units

for differential enthalpy sensing) compares outdoor temperature and hu-

midity to return-air temperature and humidity and determines the most

economical mixture of air (purchased in addition to enthalpy control

[sizes 036-150] or to ﬁrst solid-state enthalpy sensor [sizes 180-300] for

differential enthalpy sensing).

POWER EXHAUST (180-300 SHOWN)

When used with accessory/optional economizer, the power exhaust

accessory helps to relieve building over-pressurization.

NOTE: This accessory is not available with horizontal supply

adapter.

THERMOSTAT

Thermostat (24 v) provides one- or 2-stage cooling for control of unit.

Matching subbases are available with or without tamperproof

switches and automatic changeover.

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Bryant 580D User Manual Page 16

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