background image

Manufacturer reserves the right to discontinue, or change at any time, specifications or designs without notice and without incurring obligations.

Catalog No. 04-53480236-01

Printed in U.S.A.

Form 48/50-90SI

Pg 1 

3-19

Replaces: 48/50-81SI

Installation Start-Up and Service Instructions

Part No. CRCBDIOX002A00

CONTENTS

Page

SAFETY CONSIDERATIONS  . . . . . . . . . . . . . . . . . . . . 1
GENERAL  . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1
Check Package Contents   . . . . . . . . . . . . . . . . . . . . . . 2
INSTALLATION   . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2
48/50A Units  . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2
48/50P and 48/50Z Units   . . . . . . . . . . . . . . . . . . . . . . . 2
48/50N Units  . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5
START-UP . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5
Configuring the ComfortLink Controller  . . . . . . . . . . 5
Sensor Self-Calibration  . . . . . . . . . . . . . . . . . . . . . . . . 5
SERVICE  . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5
Cleaning  . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5
TROUBLESHOOTING   . . . . . . . . . . . . . . . . . . . . . . . . . 5

SAFETY CONSIDERATIONS

Installation of this accessory can be hazardous due to system

pressures, electrical components, and equipment location (such

as a roof or elevated structure). Only trained, qualified install-

ers and service technicians should install, start-up, and service

this equipment. 
When installing this accessory, observe precautions in the liter-

ature, labels attached to the equipment, and any other safety

precautions that apply:

• Follow all safety codes
• Wear safety glasses and work gloves
• Use care in handling and installing this accessory

It is important to recognize safety information. This is the safety-

alert symbol 

. When you see this symbol on the unit and in

instructions or manuals, be alert to the potential for personal

injury.
Understand the signal words DANGER, WARNING, CAUTION,

and NOTE. 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 hazards

which 

could

 result in personal injury or death. CAUTION is used

to identify unsafe practices, which 

may

 result in minor personal

injury or product and property damage. NOTE is used to highlight

suggestions which 

will

 result in enhanced installation, reliability,

or operation.

GENERAL

The CO

2

 sensor (Fig. 1) is designed to monitor carbon dioxide

(CO

2

) levels in the return air and interface with the 

Com-

fort

Link 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 

Comfort

Link con-

troller uses this signal to control the economizer damper posi-

tion and ensure adequate level of outside air in the building.

This is one of several approved methods of controlling the in-

door-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) Stan-

dard 62. The control sensor features a membrane-covered

waveguide and sample chamber that produces stable, reliable,

and highly accurate carbon dioxide readings. See Table 1 for

sensor usage.
The sensor is self-calibrating and should not need to be manu-

ally calibrated.

Fig. 1 — CO

2

 Sensor

WARNING

Prior to installation of this accessory, make sure all power is

disconnected to the unit and locked out. Failure to disconnect

power supply prior to servicing may result in serious injury.

Table 1 — Sensor Usage

UNIT

SIZE

48/50A

020-060

48/50N2,N3,N4,N5,N6,N7,N8,N9

75-150 tons

48/50P

030-100

48/50ZG,ZN

030-105

50Z2,Z3

030-105

48/50ZT,ZW,Z6,Z8

075-105

50ZX,ZZ,Z7,Z9

075-105

FRONT VIEW

SIDE VIEW

MOUNTING PLATE

48/50A, 48/50N,

48/50P, 48/50Z

CO

2

 Sensor Accessory

Содержание HH99ZZ019

Страница 1: ...h could result in personal injury or death CAUTION is used to identify unsafe practices which may result in minor personal injury or product and property damage NOTE is used to highlight suggestions which will result in enhanced installation reliability or operation GENERAL The CO2 sensor Fig 1 is designed to monitor carbon dioxide CO2 levels in the return air and interface with the Com fortLink c...

Страница 2: ...ical harness PL18 48 50P and 48 50Z Units The CO2 sensor is to be installed in the predrilled holes located in the power exhaust section See Fig 5 11 1 Shut off unit power supply 2 Open the power exhaust section doors panels to gain access 3 Remove the sensor and cover from the sensor mounting plate 4 Secure mounting plate to the bracket with no 8 screws 5 The electrical wire harness for the CO2 s...

Страница 3: ...on Fig 3 CO2 Sensor Assembly Fig 4 Harness Wiring Connections CO2 SENSOR AUXILIARY CONTROL BOX PARTITION BRACKET 48 50A ELECTRICAL HARNESS VIEW F PL18 48 50A ONLY BRACKET 48 50A SENSOR MOUNTING PLATE HOLES MUST LINE UP COVER SCREW SENSOR COVER ...

Страница 4: ... 48 50Z030 050 Units Economizer Only Fig 8 CO2 Bracket for 48 50P030 050 and 48 50Z030 050 Units No Economizer or Power Exhaust Fig 9 CO2 Bracket for 48 50P055 100 and 48 50Z055 105 Units Economizer with Power Exhaust Fig 10 CO2 Bracket for 48 50P055 100 and 48 50Z055 105 Units Economizer Only CO2 SENSOR AND BRACKET CO SENSOR AND BRACKET 2 CO2 SENSOR AND BRACKET CO2 SENSOR AND BRACKET CO2 SENSOR A...

Страница 5: ...nsor If the sensor is re configured the mA range on the ComfortLink controller must be configured to match the new values Refer to Controls and Trou bleshooting Guide for configuration details Sensor Self Calibration The CO2 sensors employ a self calibration system The system eliminates the need for manual calibration in applications where the indoor CO2 level drops to outside levels during un occ...

Страница 6: ......

Страница 7: ......

Страница 8: ...ght to discontinue or change at any time specifications or designs without notice and without incurring obligations Catalog No 04 53480236 01 Printed in U S A Form 48 50 90SI Pg 8 3 19 Replaces 48 50 81SI Carrier Corporation 2019 ...

Отзывы: