Filter
Top Products
Manufacturer reserves the right to discontinue, or change at any time, specifications or designs without notice and without incurring obligations.
Catalog No. 04-53480064-01 Printed in U.S.A. Form 48/50-73SI Pg 1 8-09 Replaces: 48/50A-4SI
Installation Start-Up and
Service Instructions
Part No. CRCBDIOX002A00
CONTENTS
SAFETY CONSIDERATIONS. . . . . . . . . . . . . . . . . . . . . . 1
GENERAL . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1
Check Package Contents. . . . . . . . . . . . . . . . . . . . . . . . . 1
INSTALLATION . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .2,3
START-UP . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4
Configuring the ComfortLink™ Controller. . . . . . . . 4
Verification and Calibration . . . . . . . . . . . . . . . . . . . . . . 4
SERVICE . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4
Cleaning . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4
TROUBLESHOOTING. . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4
SAFETY CONSIDERATIONS
Installing, starting up and servicing HVAC (heating, ventila-
tion, and air conditioning) equipment can be hazardous due to
system pressures, electrical components and equipment
locations.
Only trained, qualified installers and service technicians
should install, start up and service this equipment.
When working on HVAC equipment, observe precautions
in the literature, labels attached to the equipment and any other
safety precautions that apply. Follow all safety codes. Wear
safety glasses and work gloves. Use care when handling and
installing the sensor.
Understand the signal words DANGER, WARNING, and
CAUTION. These words are used with the safety alert
symbol . DANGER identifies the most serious hazards
which will result in severe personal injury or death.
WARNING signifies a hazard which could result in personal
injury or death. CAUTION is used to identify unsafe practices
which would result in minor personal injury or property
damage.
GENERAL
The CO
2
sensor (Fig. 1) is designed to monitor carbon
dioxide (CO
2
) levels in the return air and interface with the
ComfortLink™ controller on the rooftop air-conditioning unit.
The sensor perceives CO
2
levels in the 0 to 2,000 parts per
million (ppm) range and provides outputs indicating this level.
The unit utilizes a 4 to 20-mA analog signal. The ComfortLink
controller uses this signal to control the economizer damper
position and ensure adequate level of outside air in the
building. This is one of several approved methods of control-
ling the indoor-air quality (IAQ) in a building and meets the
requirements of local building codes and ASHRAE (American
Society of Heating, Refrigerating and Air Conditioning
Engineers) Standard 62. The control sensor features a mem-
brane-covered waveguide and sample chamber that produces
stable, reliable, and highly accurate carbon dioxide readings.
The sensor is self-calibrating and should not need to be
manually calibrated.
Check Package Contents — Remove accessory pack-
aging and inspect shipment for damage. If any damage is found,
file a claim with the shipping agent immediately. If any item is
missing or any part does not assemble properly, notify your
Carrier distributor. Table 1 lists the accessory package contents.
Table 1 — Accessory Package Contents
*Do not use the electrical harness provided in this kit for 48/50P and
48/50Z units.
WARNING
Prior to installation of this accessory, make sure all power
is disconnected to the unit and locked out. Failure to dis-
connect power supply prior to servicing may result in seri-
ous injury.
ITEM QUANTITY
CO
2
Sensor (Part No. HH99ZZ019) 1
Bracket (48/50A) 1
No. 8-18 x
1
/
4
Screw 2
1
/
4
AB-14 x
5
/
8
Screw 2
Electrical Harness* 1
Bracket (48/50P,48/50Z) 1
48/50A020-060, 48/50P030-100,
48/50Z030-105
CO
2
Sensor Accessory
FRONT VIEW
SIDE VIEW
MOUNTING PLATE
Fig. 1 — CO
2
Sensor