General - Carrier CRECOMZR052A00 Installation Instructions Manual

Table 2 — EconoMi$er IV Sensor Usage
APPLICATION
OUTDOOR AIR DRY BULB SENSOR
Carrier and Bryant
units
Outdoor Air Dry None. The outdoor air dry bulb sensor is factory
Bulb
Single Enthalpy HH57AC078
Differential HH57AC078 and
Enthalpy
CRENTDIF004A00*
CO for DCV
2
Control using
a Wall-Mounted
CO Sensor
2
CO for DCV
2
33ZCSENCO2 and 33ZCASPCO2**
Control using
a Duct-Mounted
CO Sensor
2
* CRENTDIF004A00 accessory is used on many different base units. As
such, these kits may contain parts that will not be needed for installation.
33ZCSENCO2 is an accessory CO
†
** 33ZCASPCO2 is an accessory aspirator box required for duct-mounted
applications.
CRBDIOX005A00 is an accessory that contains both 33ZCSENCO2
††
and 33ZCASPCO2 accessories.
Outside Air
Damper
ECONOMI$ER IV WITH
Accessories Required
ICP units
installed.
AXB078ENT
AXB078ENT and
CRENTDIF004A00*
33ZCSENCO2
†
or
CRCBDIOX005A00
††
sensor.
2
Economizer
Actuator
Fig. 1 — EconoMi$er IV Component Locations
See Table 1 for Package Usage and Contents.
The EconoMi$er IV system utilizes the latest technology available
for integrating the use of free cooling with mechanical cooling for
packaged rooftop units. The solid-state control system optimizes
energy consumption, zone comfort, and equipment cycling by
operating the compressors when the outdoor-air temperature is too
warm, integrating the compressor with outdoor air when free
cooling is available, and locking out the compressor when
outdoor-air temperature is too cold. Demand controlled ventilation
is supported.
The EconoMi$er IV system utilizes gear-drive technology with a
direct-mount spring return actuator that will close upon loss of
power. The EconoMi$er IV system comes standard with an
outdoor air temperature sensor, supply air temperature sensor, and
low temperature compressor lockout switch. (See Fig. 1.) Return
air temperature, indoor enthalpy and outdoor enthalpy sensors are
available for field installation. Field-installed CO
available. (See Table 2.)
Barometric relief dampers provide natural building pressurization
control. Barometric relief dampers are built into the design and are
standard. An optional power exhaust system is available for
applications requiring even greater exhaust capabilities. The
power exhaust set point is adjustable at the EconoMi$er IV
controller. See Table 2 for sensor usage.
Low Temp.
Lockout
EconoMi$er IV
Controller
Outside Air
Temp (OAT)
Sensor
Return Air Damper
3

GENERAL

sensors are
2
Wiring
Harness