Carrier CRECOMZR022A01, CRECOMZR023A01, CRECOMZR063A00 Installation Instructions Manual

CRECOMZR022A01
CRECOMZR023A01
CRECOMZR063A00

Small Rooftop Units

Accessory Vertical EconoMi$er2

2 to 12 1/2 Tons

Installation Instructions

CONTENTS

PACKAGE CONTENTS . . . . . . . . . . . . . . . . . . . . . .1

PACKAGE USAGE . . . . . . . . . . . . . . . . . . . . . . . . . 1

SAFETY CONSIDERATIONS . . . . . . . . . . . . . . . . . 1

GENERAL . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1

SENSOR USAGE . . . . . . . . . . . . . . . . . . . . . . . . . . 2

ACCESSORIES LIST . . . . . . . . . . . . . . . . . . . . . . . 3

INSTALLATION . . . . . . . . . . . . . . . . . . . . . . . . . . .3-5

WIRING DIAGRAMS . . . . . . . . . . . . . . . . . . . . . . .5-9

IMPORTANT: Read these instructions completely before attempting to

install the Vertical EconoMi$er2 Accessory.

Table 1 - Package Contents

PACKAGE NO. QTY CONTENTS

1

Hood Top and Sides

1

Hood Divider

CRECOMZR022A01,

CRECOMZR023A01

CRECOMZR063A00

1

Aluminum Filter

18

Screws

1

EconoMi$er2 Assembly

1

Supply Air Temperature Sensor

1

Hood Top and Sides

1

Hood Divider

1

Hood Filter Divider

2

Aluminum Filters

1

Hardware Bag

1

EconoMi$er2 Assembly

1

Supply Air Temp Sensor

SAFETY CONSIDERATIONS

Installation and servicing of air-conditioning equipment can be
hazardous due to system pressure and electrical components. Only

trained and qualied service personnel should install, repair, or service

air-conditioning equipment.

Untrained personnel can perform the basic maintenance functions of

replacing lters. All other operations should be performed by trained
service personnel. When working on air-conditioning equipment, observe
precautions in the literature, tags, and labels attached to the unit, and

other safety precautions that may apply. Follow all safety codes. Wear
safety glasses and work gloves.

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, and CAUTION.
These words are used with the safety-alert symbol. DANGER identies

the most serious hazards which will result in severe personal injury or

death. WARNING signies a hazard 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.

WARNING

!

ELECTRICAL SHOCK HAZARD

Failure to follow this warning could cause personal injury and/or
death.

Disconnect power supply and install lockout tag before attempting to
install the accessory.

!

Table 2 - Package Usage

UNIT SIZE PART NUMBER

Small Cabinet,

Footprint size: 46 3/4” x 74 3/8”

Large Cabinet,

Footprint size: 58 1/2” x 88 1/8”

Extra-Large Cabinet,

Footprint size: 63 3/8” x 115 7/8”

CRECOMZR022A01

CRECOMZR023A01

CRECOMZR063A00

GENERAL

The EconoMi$er2 system utilizes the latest technology available for
integrating the use of free cooling with mechanical cooling for rooftop
units.

This system utilizes gear-drive technology with a direct mount spring

return actuator that will close upon loss of power. The EconoMi$er2

system comes standard with an outdoor air temperature sensor. Field-

installed CO2 sensors are available.

Standard barometric relief dampers provide natural building pressurization

control. An optional power exhaust system is available for applications
requiring even greater exhaust capabilities.

EconoMi$er2 accessories have a 4 to 20 mA actuator signal control.
These accessories do not include the EconoMi$er2 controller. The
EconoMi$er2 actuator is operated by a 4 to 20 mA signal from an existing
eld-supplied controller (such as PremierLinkTM controller). See Table

3 for sensor usage.

1

Table 3 - Sensor Usage

APPLICATION

OUTDOOR AIR

TEMPERATURE SENSOR

Dry Bulb Temperature

with PremierLinkTM†

(PremierLink requires

Included

HH79NZ039

4 to 20 mA actuator)

Differential Dry Bulb

Temperature with

PremierLink†

(PremierLink requires

Included

HH79NZ039

4 to 20 mA actuator)

Single Enthalpy with

PremierLink†

(PremierLink requires

Included

Not Used

4 to 20 mA actuator)

Differential Enthalpy

with PremierLink†

(PremierLink requires

Included

Not Used

4 to 20 mA actuator)

† PremierLink control requires Supply Air Temperature sensor 33ZCSENSAT - Included with factory-installed PremierLink control; eld-supplied and
eld-installed with PremierLink control.

NOTES:

1. CO2 Sensors (Optional)
. . 33ZCSENCO2 - Room sensor (adjustable). Aspirator box is required for duct mounting of the sensor.
. . 33ZCASPCO2 - Aspirator box used for duct-mounted CO2 room sensor.
. . 33ZCT55CO2 - Space temperature and CO2 room with override.
. . 33ZCT56CO2 - Space temperature and CO2 room sensor with override and setpoint.

2. All unit include the following standard Sensors:
. . Outdoor-Air Sensor - HH79NZ039
. . Mixed-Air Sensor - (PremierLink control requires Supply Air Temperature sensor 33ZCSENSAT)

RETURN AIR

TEMPERATURE SENSOR

— — —

Required —

33ZCT55SPT

—

—

OUTDOOR AIR

ENTHALPY SENSOR

— —

Required —

HH57AC077

Required —

HH57AC077

RETURN AIR

ENTHALPY SENSOR

—

Required —

HH57AC078

2

ACCESSORIES LIST

The EconoMi$er2 has several eld-installed accessories available to
optimize performance. Refer to Table 4 for authorized parts and power
exhaust descriptions

Table 4 - EconoMi$er2 Field-Installed

Accessories

DESCRIPTION PART NUMBER

Small Cabinet Power Exhaust 208-230 v 1 Ph CRPWREXH030A01

Small Cabinet Power Exhaust 460 v 3Ph CRPWREXH021A01

Large Cabinet Power Exhaust 208-230 v 1 Ph CRPWREXH022A01

Large Cabinet Power Exhaust 460 v 3 Ph CRPWREXH023A01

Extra Large Cabinet Power Exhaust 208-230 v 1 Ph CRPWREXH080A00

Extra Large Cabinet Power Exhaust 460 v 3 Ph CRPWREXH081A00

Return Air Dry Bulb 33ZCT55SPT

Outdoor Air Enthalpy Sensor HH57AC077

Return Air Enthalpy Sensor HH57AC078

CO2 Room Sensor 33ZCSENCO2

Aspirator Box for Duct Mount
CO2 Sensor

Space Temperature and CO2
Room Sensor with Override

Space Temperature and CO2 Room Sensor
with Override and Set Point

33ZCASPCO2

33ZCT55CO2

33ZCT56CO2

INSTALLATION

Turn off unit power supply(s) and install lockout tag.1.

WARNING

!

ELECTRICAL SHOCK HAZARD

Failure to follow this warning could result in personal injury and/or
death.

Disconnect power supply and install lockout tag before attempting to
install accessory.

Remove the existing unit lter access panel. Raise the panel and 2.

swing the bottom outward. The panel is now disengaged from the

track and can be removed. (See Fig. 2.)

Remove the indoor coil access panel and discard. (See Fig. 2.)3.

The box with the EconoMi$er2 hood components is shipped with 4.
the EconoMi$er2. Remove hood from packaging. The hood top and

sides are shipped factory assembled.

NOTE: If the power exhaust accessory is to be installed on the unit,
the hood shipped with the EconoMi$er2 will not be used and may be
discarded. Save the aluminum lter for use in the power exhaust hood

assembly.

5. Insert the hood divider between the hood sides. (See Fig. 3) Secure
hood divider with 2 screws (provided) on each hood side. Screws

should go through the hood sides into the divider. The hood divider

is also used as the bottom lter rack for the aluminum lter. On
hood for extra large cabinet install lter divider. (See Fig. 4.)

6. Slide the EconoMi$er2 assembly into the rooftop unit. (See Fig. 6).
On small and large cabinets be sure to engage the rear EconoMi$er2
ange under the tabs in the return-air opening of the unit base. (See

Fig. 7)

7. Secure the EconoMi$er2 to unit along side and bottom anges using
the screws provided. (See Fig. 6)

8. Remove the tape securing the relief dampers in place.

9. Remove and save the 12-pin jumper plug from the unit wiring

EconoMi$er2
Plug

EconoMi$er2
Dry Bulb
Outside Air
Sensor

Actuator

Shipping
Tape

Barometric Relief
Dampers

Gear-Driven
Damper

Fig. 1 - EconoMi$er2 Component Locations —

(2 to 6 Ton Shown)

harness (located in the upper left corner of the unit). Insert the
EconoMi$er2 plug into the unit wiring harness. Refer to Fig. 8 for

wiring diagram.

NOTE: The 12-pin jumper plug should be saved for future use, in the
event that the EconoMi$er2 is removed from the unit. The jumper plug is
not needed as long as the EconoMi$er2 is installed.

NOTE: Be sure that the arrow on the actuator motor is pointing to “Run”
and not to “Test.” If the arrow is at “Test,” the Economizer damper will
drive open. (Extra large cabinet only.)

11. While everything is open install and wire any other accessories

and/or sensors as applicable and convenient, per their installation

instructions. Some accessories require that unit ducting already be
installed.

NOTE: If also installing a power exhaust accessory, skip step 12 and
follow the power exhaust instructions instead.

12. Install the EconoMi$er2 hood over the EconoMi$er2. Use screws
provided. (See Fig. 8.)

13. Check all wiring for safety then reapply power to the unit. Verify
correct operation and setting of the accessory(s) per the Conguration

and Operations sections of the instruction.

15. Replace the lter access panel. Slide top of panel into track and lift.
Push bottom of panel into place.

16. Install the economizer hood lter(s) by opening the lter clips which
are located underneath the hood top. Insert the aluminum lter(s)
into the bottom lter rack (hood divider). Push the lter into position
past the open lter clips. Close the lter clips to lock the lter into
place. (See Fig. 5.)

3

Filter Access Panel

Hood Top

Filter Clip

Outside Air

Compressor
Access Panel

Outdoor-Air Opening and
Indoor Coil Access Panel

Fig. 2 - Typical Access Panel Locations

C

Hood Divider

A

D

B

Hood Top and
Side Assembly

Fig. 3 - Hood Assembly

ECONOMIZER P/N A B C D SHIP WT.

CRECOMZR022A01 33.37” 17.43” 19.05” 29.5” 55 lb

CRECOMZR023A01 40.37” 22.28” 24.48” 36.27” 80lb

CRECOMZR063A00 52.92” 27.03” 33.41” 49.92” 98lb

NOTE: The CRECOMZR063A00 hood has 2 aluminum lters and a
hood lter divider that installs between the lters.

Hood
Divider

Barometric

Airow

Cleanable
Aluminum Filter

Fig. 5 - Filter Installation

HVAC Unit Filters

Wiring
Harness

EconoMi$er2
Controller

EconoMi$er2

Fig. 6 - EconoMi$er2 Installed in HVAC Unit

(2 to 6 Ton Shown)

Unit Filter
Rack

Insert
Screw in
EconoMi$er2
Flanges

Fig. 4 - Hood for Extra Large Cabinet

EconoMi$er2
Hold Down Tab

EconoMi$er2

Unit Base

EconoMi$er2 Rear Flange

Fig. 7 - Rear EconoMi$er2 Flange Installation

(Small and Large Cabinet)

Hood Filter
Divider

4

4

3

5

2

8

6

7

1

10

11

9

12

PINK

VIOLET

BLACK

BLUE

YELLOW

RUN

-

+

RED

WHITE

RED

BLACK

EconoMi$er2

Mounting
Screws

Fig. 8 - EconoMi$er2 Hood Installation

EconoMi$er2
Hood

Hood Divider

500 OHM
Resistor

NOTE 1

Actuator

Assembly

Optional CO

Sensor 4 - 20 mA

Direct Drive

Output

Actuator

NOTE:

Switch on actuator must be in run position for economizer to operate.

Fig. 9 - EconoMi$er2 Wiring

2

EconoMi$er2

5

Fig. 10 - EconoMi$er2 Connection to PremierLinkTM Electric Heating/Cooling Controls

6

Fig. 11 - EconoMi$er2 Connection to PremierLinkTM Gas Heat/Electric Cooling Controls

7

Fig. 12 - EconoMi$er2 Connection to RTU-MP Electric Heating/Cooling Controls

8

Fig. 13 - EconoMi$er2 Connection to RTU-MP Gas Heat/Electric Cooling Controls

9

Fig. 14 - Barometric Relief Flow Capacity

0

500

1000

1500

2000

2500

0 0.05 0.1 0.15 0.2 0.25 0.3

RELIEF FLOW (CFM)

RETURN DUCT STATI C PRES SURE (in. wg)

Small

Cabin et

Large and
Ext ra
Large
Cabin et

0

1000

2000

3000

4000

5000

6000

0 0.1 0.2 0.3 0.4

RETURN AIR FLOW (CFM)

RETURN DUCT STATI C PRESSURE DROP (in. wg )

Small Cabinet

Large Cabinet

Extra Large Cabinet

Fig. 15 - Return Air Pressure Drop

Copyright 2010 Carrier Corporation ● 7310 W. Morris St. ● Indianapolis, IN

Manufacturer reserves the right to discontinue, or change at any time, specication or designs without notice and without incurring obligations

Catalog No. IIK-CRECOMZR023-02Printed in U.S.A. Edition Date: 4/10

Replaces: IIK-CRECOMZR023-01

10