Carrier SINGLE PACKAGE ROOFTOP UNITS 48PG20-28 Installation And Service Instructions Manual page 40

DAMPER
ACTUATOR
ECONOMIZER
BLOCK OFF
Fig. 23 — EconoMi$er IV Component Locations (Exploded View)
Fig. 24 — Sensor Locations (OAT and MAT)
APPLICATION
Outdoor Air Dry Bulb
Differential Dry Bulb
Single Enthalpy
Differential Enthalpy
CO for DCV Control using a
2
Wall-Mounted CO Sensor
2
CO for DCV Control using a
2
Duct-Mounted CO Sensor
2
*CRENTDIF004A00 and CRTEMPSN002A00 accessories are used on many different base units. As such, these kits may contain parts that will not be
needed for installation.
†33ZCSENCO2 is an accessory CO
**33ZCASPCO2 is an accessory aspirator box required for duct-mounted applications.
††CRCBDIOX005A00 is an accessory that contains both 33ZCSENCO2 and 33ZCASPCO2 accessories.
PL7
PL7
OUTSIDE AIR
ENTHALPY
INDOOR AIR
ENTHALPY
MAT LOCATION
OAT LOCATION
Table 28 — EconoMi$er IV Sensor Usage
ECONOMI$ER IV WITH OUTDOOR AIR
DRY BULB SENSOR
Accessories Required
None. The outdoor air dry bulb sensor is factory installed.
CRTEMPSN002A00*
HH57AC078
HH57AC078
and
CRENTDIF004A00*
33ZCSENCO2
33ZCSENCO2†
and CRCBDIOX005A00††
33ZCASPCO2**
sensor.
2
DAMPER
ASSEMBLY
WIRE
HARNESS
WIRE TIES
19
LED ON
18
D
17
16 LED OFF
15
14
13
12
11
10
9
50
40 45 55
DEGREES FAHRENHEIT
Fig. 25 — Temperature Changeover Set Points
ECONOMI$ER IV WITH SINGLE
None. The single enthalpy sensor is factory installed.
33ZCSENCO2†
and
33ZCASPCO2**
40
LED ON
C
LED ON
LED OFF
B
LED ON
LED OFF
A
LED OFF
60 65 70 75 80 85 90 95
ENTHALPY SENSOR
Accessories Required
CRTEMPSN002A00*
(2) CRTEMPSN002A00*
CRENTDIF004A00*
33ZCSENCO2
CRCBDIOX005A00††
100