Carrier CRECOMZR072A01 Installation Instructions Manual Download

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

Catalog No. 04-53480313-01

Printed in U.S.A.

Form IIK-CRECOMZR72-03

Pg 1

8-21 Replaces: IIK-CRECOMZR72-02

Installation Instructions

Part No: CRECOMZR072A01 and CRECOMZR073A01

CONTENTS

Page

• BAROMETRIC HOOD (VERTICAL CONFIGURATION)

Accessories . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9

• SUPPLY AIR TEMPERATURE SENSOR (SAT)

• OUTDOOR AIR TEMPERATURE SENSOR (OAT)

• INDOOR AIR QUALITY (CO2) SENSOR

• ENTHALPY SENSORS AND CONTROL

• OUTDOOR AIR ENTHALPY SENSOR/ENTHALPY

CONTROLLER (HH57AC077)

• RETURN AIR ENTHALPY SENSOR (HH57AC078)

• ENTHALPY SWITCH/RECEIVER (33CSENTHSW)

• OUTDOOR ENTHALPY CONTROL REQUIRES ONLY

AN ENTHALPY SWITCH/RECEIVER (33CSENTHSW).

• DIFFERENTIAL ENTHALPY CONTROL REQUIRES

BOTH AN ENTHALPY SWITCH/RECEIVER

(33CSENTHSW) AND AN ENTHALPY SENSOR

(33CSENTSEN).

Power Exhaust   . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13
Demand Controlled Ventilation  . . . . . . . . . . . . . . . . 13
Fire and Smoke Control  . . . . . . . . . . . . . . . . . . . . . . 13
START-UP   . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14
OPERATION . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14
Cooling, Units with EconoMi$er 2, PremierLink

Control and a Thermostat . . . . . . . . . . . . . . . . . . 14

• ROUTINE 1 (OAT<DXCTLO)

• ROUTINE 2 (DXCTLO < OAT < 68°F)

• ROUTINE 3 (OAT > 68° F)

Heating, Units with EconoMi$er 2, PremierLink™

Control and a Thermostat . . . . . . . . . . . . . . . . . . 16

Cooling, Units with EconoMi$er2,

PremierLink Control and a Room Sensor . . . . . . 16

Heating Unit with EconoMi$er2, PremierLink Control

and a Room Sensor . . . . . . . . . . . . . . . . . . . . . . . 17

• IF HEATING PID STAGES=2

• IF HEATING PID STAGES=3 AND AUXOUT=HS3

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 installers and

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

equipment.

When installing this accessory, 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 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 EconoMi$er

2 accessories, with 4 to 20 mA actuator signal

control, do not have a built-in controller. The economizer actuator

is operated by a 4 to 20 mA signal from an existing field-supplied

controller (such as PremierLink™ control). A 12-pin plug is

provided for connection to the control.

Refer to the specific DDC (Direct Digital Controls) literature for

how to indicate

economizer alarm/errors in the building space.

Alarm/error indication may be required for local regulation

compliance.

WARNING

Electrical shock can cause personal injury and death. Shut off

all power to this equipment during installation. There may be

more than one disconnect switch. Tag all disconnect locations

to alert others not to restore power until work is completed.

CAUTION

PERSONAL INJURY HAZARD

Failure to follow this caution can result in personal injury and

damage to the unit.

Cover the duct opening as a precaution so objects cannot fall

into the return duct opening. Be sure to remove the cover when

installation is complete.

IMPORTANT: Read these instructions completely before

attempting to install the accessory economizer.

Medium Rooftop Units

Vertical and Horizontal EconoMi$er

2 Accessory

15 to 27.5 Tons

Summary of Contents for CRECOMZR072A01

Page 1: ...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...

Page 2: ...d relief air damper leakage requirements and when used with Carrier ComfortLink RTU Open Premierlink SystemVu or I O Flex control systems meet IECC 2015 section C403 2 4 7 for Fault Detection and Diagnostic requirements Note IECC 2015 section C403 2 4 7 1 requires differential return air sensor which must be ordered separately Outside air and return air volume dampers are AMCA Air Movement and Con...

Page 3: ...It is important that the damper be perfectly square in the unit 6 Reinstall the left side corner post on to the unit NOTE The corner post will sit behind the economizer shroud flange See Fig 5 Screw through the corner post and through the economizer shroud See Fig 3 and 5 7 Insert provided screw through the bottom left rear of the economizer and into the unit base See Fig 3 Reinstall the unit s le...

Page 4: ... 9 10 11 12 WHT WHT YEL PINK VIO BLK BLK BLK BLU RED RED RED 73 73 73 69 69 69 69 69 73 To Optional Enthalpy Sensor 500 OHM Resistor Actuator Outside Air Sensor Units Left Side Panel Left Front Corner Post Screw Economizer Flange Economizer Shroud Jumper Plug Remove Harness Plug From Economizer Harness Plug From HVAC ...

Page 5: ...ood top Item 3 Align the central retainers to the holes located on the filter support Item 1 so the central retainer is perpendicular to the hood and each filter support Secure using the screws provided i Apply seal strip to top diverters Item 7 j Secure top diverters Item 7 to the hood top Item 3 k Install outdoor air screens by sliding them into each of the four spaces created by the hood filter...

Page 6: ... 3 3 Side Retainer 2 4 Hood Top 1 5 Left Hood Side 1 6 Right Hood Side 1 7 Top Diverters 2 8 Deflector 3 Apply seal strip to the front of this flange Apply seal strip to the back of this flange Apply seal strip to the back of this flange Apply seal strip to the back of this flange 7 7 3 5 6 8 8 2 8 6 4 2 1 2 Insert Air Screen Slide Into Position Outdoor Air Hood CRBARHOD001A00 Relief Hood Ordered ...

Page 7: ...ve and save the 12 pin jumper plug from the unit wiring harness See Fig 6 Insert the EconoMi er 2 plug into the unit wiring harness plug See Fig 6 NOTE The 12 pin jumper plug should be saved for future use in the event that the EconoMi er2 is removed from the unit The jumper plug is not needed as long as the EconoMi er 2 is installed 9 Install the provided bottom panel with the horizontal return d...

Page 8: ... 19 illustrates the installed barometric hood parts Fig 19 Installed Barometric Hood Side View and Isometric View For horizontal return and field installed economizer install the economizer as follows 1 Install the field provided horizontal ductwork onto the unit Duct height must be at least 19 1 2 inches high however the duct can be no taller than the top of the relief opening in the bottom panel...

Page 9: ...e 12 pin economizer harness pin 5 and 6 are used to connect the OAT sensor to the PremierLink board INDOOR AIR QUALITY CO2 SENSOR Mount the optional indoor air quality CO2 sensor according to manufacturer specifications A separate field supplied transformer must be used to power the CO2 sensor Wire the CO2 sensor to the COM and IAQI terminals of J5 on the PremierLink controller Refer to the Premie...

Page 10: ... 11 12 13 14 15 16 17 GRN DDC CONTROL RMTOCC CMPSAFE FSD SFS NOT USED RED PNK RED WHT RED BLU RED YEL RED 18 19 20 21 22 23 24 25 26 ORN RED ENTH POSITION 0 POSITION 1 1 LEN CCN 4 NO ACTION LOAD FACTORY DEFAULTS ON POWERUP 0 1 1234 ECONO J9 J7 NOT USED J8 FAN GRN CMP1 YEL CMP2 BLU HS1 WHT HS2 HS3 EXH RVS PNK ORNRED PWR RELAYS RED CUT FOR DUAL TRANSFORMER EQUIPMENT BLK WHT RED DISCRETE J4 0 20mA IN...

Page 11: ...eturn air enthalpy sensor to the enthalpy controller 2 At the enthalpy control remove the factory installed resistor from the SR and terminals 3 Connect the field supplied RED wire to spade connector on the return air enthalpy sensor and the SR terminal on the enthalpy controller Connect the BLK wire to S spade connector on the return air enthalpy sensor and the SR ter minal on the enthalpy contro...

Page 12: ...EQUIRES BOTH AN ENTHALPY SWITCH RECEIVER 33CSENTHSW AND AN ENTHALPY SENSOR 33CSENTSEN The enthalpy switch receiver is mounted in the outdoor air inlet and calculates outdoor air enthalpy The enthalpy sensor is mounted in the return airstream and calculates the enthalpy of the indoor air For differential enthalpy control the enthalpy switch receiver energizes the HI enthalpy relay output when the o...

Page 13: ...set point has not been reached By the time the CO2 level reaches the set point the damper will be at maximum ventilation and should maintain the set point In order to have the CO2 sensor control the economizer damper in this manner first determine the damper voltage output for minimum or base ventilation Base ventilation is the ventilation required to remove contaminants during unoccupied periods ...

Page 14: ... cooling occurs when there is no call from the thermostat except G Pre cooling is defined as the economizer modulates to provide 70 F supply air When free cooling is available the PremierLink control will control the compressors and economizer to provide a supply air temperature determined to meet the Y1 and Y2 calls from the thermostat using the following 3 routines The 3 control routines are bas...

Page 15: ... or right Actuator will move to its Control Signal position Actuator operates properly Step 8 Does not drive toward Control Signal Position Step 4 4 Make sure the control signal positive is connected to Wire No 3 and control signal negative is connected to Wire No 1 Most control problems are caused by reversing these two wires Verify that the reversing switch is all the CCW or CW Drives to Control...

Page 16: ...st 30 seconds The SPT SAT and OAT inputs must have valid readings OAT must be less than 75 F OAT must be less than SPT Enthalpy must be LOW may be jumpered if an enthalpy sensor is not available Economizer position is NOT forced When free cooling is available the outdoor air damper is positioned through the use of a Proportional Integral Derivative Loop PID control process to provide a calculated ...

Page 17: ... the number of heat stages is calculated otherwise the required number of heat stages will be set to 0 If the PremierLink controller determines that heat stages are re quired the economizer damper will be moved to minimum posi tion if occupied and closed if unoccupied Staging should be as follows IF HEATING PID STAGES 2 HEAT STAGES 1 50 capacity will energize HS1 HEAT STAGES 2 100 capacity will en...

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Page 20: ...ht to discontinue or change at any time specifications or designs without notice and without incurring obligations Catalog No 04 53480313 01 Printed in U S A Form IIK CRECOMZR72 03 Pg 20 8 21 Replaces IIK CRECOMZR72 02 2021 Carrier ...

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