Bryant 580D - Page 16

OPTIONS AND ACCESSORIES (cont)
ACCUSENSOR™ II
CONTROL
(036-150 Only)
MINIMUM
POSITION
OPEN
3
1
T
P
P1
T1
4
2
5
S
S
O
D
C
TR
B
REV. B
198818A
%
H
U
M
I
D
I
T
Y
90
70
60
30
10
D
C
B
A
60
65
70
75
55
50
85
80
DAMPER
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
1
2
3
TR
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
H
C
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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