Carrier 50HJQ014 - Differential Enthalpy Control

17
24 VAC OUTPUT FROM N/C CONTACT WHEN THE
OUTDOOR ENTHALPY IS LESS THAN THE
INDOOR ENTHALPY
(ENABLE ECONOMIZER)
24 VAC OUTPUT FROM N/O CONTACT WHEN THE
INDOOR ENTHALPY IS GREATER THAN THE
OUTDOOR ENTHALPY
24 VAC
SECONDARY
HI
LOW
GND 24
VAC
ENTHALPY
4-20
mA
IN
24-36
VDC
OUT
JUMPER SETTINGS FOR 33CSENTHSW
M1
M2
M3
0%
50%
100%
OFF
33CSENTHSW
JUMPER SETTINGS FOR 33CSENTSEN
M1
M2
M3
0%
50%
100%
OFF
33CSENTSEN
24-36
VDC
IN
ORN
120 VAC
LINE VOLTAGE
4-20
mA
OUT
Fig. 25 — Differential Enthalpy Control Wiring
LED
A
B
C
D
TR TR1
SO
SR
2
3
1
+
+
BRN
RED
GRAY/ORN
GRAY/RED
WIRE HARNESS
IN UNIT
BLK
RED
S
+
(RETURN AIR
ENTHALPY
SENSOR)
S
+
(OUTDOOR
AIR
ENTHALPY
SENSOR)
ENTHALPY CONTROLLER
NOTES:
1. Remove factory-installed jumper across SR and + before con-
necting wires from return air sensor.
2. Switches shown in high outdoor air enthalpy state. Terminals 2
and 3 close on low outdoor air enthalpy relative to indoor air
enthalpy.
3. Remove sensor mounted on back of control and locate in out-
side airstream.
Fig. 26 — Outdoor and Return Air Sensor Wiring
Connections for Differential Enthalpy Control
BRACKET
+
C7400A1004
Fig. 27 — Differential Enthalpy Control,
Sensor and Mounting Plate (33AMKITENT006)
HH57AC077
ENTHALPY
CONTROL AND
OUTDOOR AIR
ENTHALPY
SENSOR
HH57AC078 ENTHALPY
SENSOR (USED WITH
ENTHALPY CONTROL
FOR DIFFERENTIAL
ENTHALPY OPERATION)
MOUNTING PLATE