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APPLICATION DATA (cont)
ECONOMI$ER IV SENSOR USAGE CHART
*CRENTDIF004A00 and CRTEMPSN002A00 accessories are used on many different base units. As such, these kits may contain parts that will not be needed
for installation.
†CGCDXSEN004A00 is an accessory CO
2
sensor.
**CGCDXASP001A00 is an accessory aspirator box required for duct-mounted applications.
Economizer Changeover Curves
CONTROL
CURVE
A
B
C
D
CONTROL POINT
APPROX. °F (°C)
AT 50% RH
73 (23)
70 (21)
67 (19)
63 (17)
1
2
1
4
1
6
1
8
2
0
2
2
2
4
26
28
30
32
3
4
3
6
3
8
40
42
4
4
46
9
0
1
0
0
80
70
6
0
50
4
0
3
0
20
1
0
E
NT
HA
LPY
—
B
TU
P
E
R
PO
U
N
D
DR
Y A
IR
85
(29)
90
(32)
95
(35)
100
(38)
105
(41)
110
(43)
35
(2)
35
(2)
40
(4)
40
(4)
105
(41)
110
(43)
45
(7)
45
(7)
50
(10)
50
(10)
55
(13)
55
(13)
60
(16)
60
(16)
65
(18)
65
(18)
70
(21)
70
(21)
75
(24)
75
(24)
80
(27)
80
(27)
85
(29)
90
(32)
95
(35)
100
(38)
APPROXIMATE DRY BULB TEMPERATURE— °F
(
°C
)
A
A
B
B
C
C
D
D
RELA
T
IVE HUM
IDITY
(
%
)
HIGH LIMIT
CURVE
a50-7751
APPLICATION
ECONOMI$ERIV WITH OUTDOOR AIR
DRY BULB SENSOR
ECONOMI$ERIV WITH SINGLE
ENTHALPY SENSOR
Accessories Required Accessories Required
Outdoor Air Dry Bulb None. The outdoor air dry bulb sensor is factory installed. CRTEMPSN002A00*
Differential Dry Bulb CRTEMPSN002A00* (2) CRTEMPSN002A00*
Single Enthalpy HH57AC078 None. The single enthalpy sensor is factory installed.
Differential Enthalpy
HH57AC078
and
CRENTDIF004A00*
CRENTDIF004A00*
CO
2
for DCV Control using a
Wall-Mounted CO
2
Sensor
CGCDXSEN004A00
CO
2
for DCV Control using a
Duct-Mounted CO
2
Sensor
CGCDXSEN004A00†
and
CGCDXASP001A00**