Carrier CRECOMZR067A00 User manual

1
Installation Instructions
Read these instructions completely before attempting to install the
Vertical EconoMi$er X Accessory.
CONTENTS
SAFETY CONSIDERATIONS . . . . . . . . . . . . . .1
GENERAL. . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1
EconoMi$er X Sensor Usage . . . . . . . . . . . . . 2
ACCESSORIES LIST. . . . . . . . . . . . . . . . . . . . .2
INSTALLATION . . . . . . . . . . . . . . . . . . . . . . . 2-5
EconoMi$er X Standard Sensors . . . . . . . . . .5
EconoMi$er X Control Modes . . . . . . . . . . 5-11
OPERATION . . . . . . . . . . . . . . . . . . . . . . . . . . 12
TROUBLESHOOTING . . . . . . . . . . . . . . . . . . 13
SAFETY CONSIDERATIONS
Improper installation, adjustment, alteration, service, maintenance, or
use can cause explosion, re, electrical shock or other conditions which
may cause personal injury or property damage. Consult a qualied
installer, service agency, or your distributor or branch for information or
assistance. The qualied installer or agency must use factory-authorized
kits or accessories when modifying this product. Refer to the individual
instructions packaged with the kits or accessories when installing.
Follow all safety codes. Wear safety glasses and work gloves. Use
quenching cloths for brazing operations and have a re extinguisher
available. Read these instructions thoroughly and follow all warnings
or cautions attached to the unit. Consult local building codes and
appropriate national electrical codes (in USE, ANSI/NFPA70, National
Electrical Code (NEC); in Canada, CSA C22.1) for special requirements.
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 identies the most serious hazards which will result in severe
personal injury or death. WARNING signies 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$er X system utilizes the latest technology available
for integrating the use of free cooling with mechanical cooling for
packaged rooftop units. The solid-state control system optimizes energy
consumption, zone comfort, and equipment cycling by operating the
compressors when the outdoor-air temperature is too warm, integrating
the compressor with outdoor air when free cooling is available, and
locking out the compressor when outdoor-air temperature is too cold.
Demand control ventilation is supported.
Units displaying 17th position of the model number to indicate that the
unit is equipped with the factory-installed VFD (Variable Frequency
Drive) option for 2-speed indoor fan control. The VFD option is required
for units equipped with EconoMi$er X. For detailed information on the
VFD see the Variable Frequency Drive (VFD) Installation, Setup and
Troubleshooting Supplement.
The EconoMi$er X system utilizes gear-drive technology with a direct-
mount spring return actuator that will close upon loss of power. The
EconoMi$er X system comes standard with an outdoor air temperature
sensor, mixed air temperature sensor. Outdoor enthalpy, indoor enthalpy,
and CO2 sensors are available for eld installation. See Table 3 for
sensor usage.
IMPORTANT: The economizer outside air dampers meet the ASHRAE
90.1 leakage requirements. Economizer must be installed perfectly
square to avoid damper leakage. Squareness tolerance +/- 1/32”.
Standard barometric relief dampers provide natural building pressurization
control. An optional power exhaust system is available for applications
requiring even greater exhaust capabilities. The power exhaust set point
is adjustable at the EconoMi$er X controller.
See Table 1 for package usage. See Table 2 for package contents. See
Table 3 for sensor usage.
ACCESSORIES LIST
WARNING
ELECTRICAL SHOCK HAZARD
Failure to follow this warning could cause personal injury or death.
Before performing service or maintenance operations on the unit,
always turn off main power switch to unit and install lock(s) and
lockout tag(s). Unit may have more than one power switch. Ensure
electrical service to rooftop unit agrees with voltage an amperage
listed on the unit rating plate.
CAUTION
CUT HAZARD
Failure to follow this caution may result in personal injury.
Sheet metal parts may have sharp edges or burrs. Use care and wear
appropriate protective clothing, safety glasses and gloves when
handling parts and servicing roof top units.
!
!
Table 1 - Package Usage
Table 2 - Package Contents
UNIT SIZE PART NUMBER
Small Cabinet,
Footprint size: 46 3/4” x 74 3/8” CRECOMZR067A02
Large Cabinet,
Footprint size: 58 1/2” x 88 1/8” CRECOMZR069A03
Extra-Large Cabinet,
Footprint size: 63 3/8” x 115 7/8” CRECOMZR071A00
PACKAGE NO. QTY CONTENTS
CRECOMZR067A00,
CRECOMZR069A00
1
1
1
18
1
1
Hood Top and Sides
Hood Divider
Aluminum Filter
Screws
EconoMi$er X Assembly
Mixed Air Temperature Sensor
CRECOMZR071A00
1
1
1
2
1
1
1
Hood Top and Sides
Hood Divider
Hood Filter Divider
Aluminum Filters
Hardware Bag
EconoMi$er X Assembly
Mixed Air Temp Sensor
Small Rooftop Products
3 to 12 ½ Tons
Vertical EconoMi$er X Accessory
CRECOMZR067A00
CRECOMZR069A00
CRECOMZR071A00
!

2
The EconoMi$er X has several eld-installed accessories available to
optimize performance. Refer to Table 4 for authorized parts and power
exhaust descriptions
INSTALLATION
1. Turn off unit power supply(s) and install lockout tag.
2. Remove the existing unit lter access panel. Raise the panel and
swing the bottom outward. The panel is now disengaged from the
track and can be removed. (See Fig. 2.)
3. Remove the indoor coil access panel and discard. (See Fig. 2.)
4. The box with the EconoMi$er X hood components is shipped with
the EconoMi$er X. Remove hood from packaging. The hood top
and sides are shipped factory assembled.
NOTE: If the power exhaust accessory is to be installed on the unit,
the hood shipped with the EconoMi$er X 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. 4A.)
6. Set the EconoMi$er X upright. (See Fig. 5.)
7. Slide the EconoMi$er X assembly into the rooftop unit. (See Fig. 5).
On small and large cabinets be sure to engage the rear EconoMi$er
X ange under the tabs in the return-air opening of the unit base.
(See Fig. 6)
IMPORTANT: These economizer outside air dampers meet ASHRAE
90.1 leakage requirements and must be installed perfectly square.
Verify squareness by measuring diagonally across corners of outside
air damper. Tolerance +/- 1/32”.
8. Secure the EconoMi$er X to unit along side and bottom anges
using the screws provided.
9. Remove the tape securing the relief dampers in place.
10. Remove and save the 12-pin jumper plug from the unit wiring
harness (located in the upper left corner of the unit). Insert the
EconoMi$er X plug into the unit wiring harness. Refer to Fig. 7 and
8 for wiring diagram.
NOTE: The 12-pin jumper plug should be saved for future use, in the
event that the EconoMi$er X is removed from the unit. The jumper plug
is not needed as long as the EconoMi$er X is installed.
11. If EconoMi$er X will be operating under enthalpy control, replace
the factory installed outdoor dry bulb temperature sensor with
accessory enthalpy sensor HH57AC081. (See Fig. 1.)
12. Remove the indoor fan motor access panel. (See Fig. 9.)
13. The supply air temperature sensor looks like an eyelet terminal with
wires running to it. The sensor is located on the “crimp end” and
is sealed from moisture. Mount the supply air temperature sensor
(provided) to the lower left section of the indoor fan blower housing.
(See Fig. 10.) Use the screw provided and use existing hole. Connect
the violet and pink wires to the corresponding connections on the
supply air temperature sensor. (See Fig. 8.)
Table 3 - EconoMi$er X Sensor Usage
APPLICATION
ECONOMI$ER X WITH OUTDOOR AIR
DRY BULB SENSOR
Accessories Required
Outdoor Air
Dry Bulb
None. The outdoor air dry bulb sensor
is factory installed
Single
Enthalpy HH57AC081
Differential
Enthalpy HH57AC081
CO2for
DCV Control
Using a
Wall-Mounted
CO2Sensor
33ZCSENCO2
or
CGCDXSEN004A00
CO2for
DCV Control
Using a
Duct-Mounted
CO2Sensor
33ZCSENCO2 or
CGCDXSEN004A00†
and
33ZCASPCO2 or
CGCDXASP00100**
CRCBDIOX005A00††
OR
†33ZCSENCO2 and CGCDXSEN004A00 are accessory CO2 sensors.
**33ZCASPCO2 and CGCDXASP00100 are accessory aspirator boxes required for duct-mounted
applications.
††CRCBDIOX005A00 is an accessory that contains both 33ZCSENCO2 and 33ZCASPCO2
accessories.
Table 4 - EconoMi$er X Field-Installed
Accessories
DESCRIPTION PART NUMBER
Small Cabinet Power Exhaust 208-230 v 1 Ph CRPWREXH030A01
Small Cabinet Power Exhaust 460 v 3Ph CRPWREXH021A01
Large Cabinet Power Exhaust 208-230 v 1 Ph CRPWREXH022A01
Large Cabinet Power Exhaust 460 v 3 Ph CRPWREXH023A01
Extra Large Cabinet Power Exhaust 208-230 v 1 Ph CRPWREXH080A00
Extra Large Cabinet Power Exhaust 460 v 3 Ph CRPWREXH081A00
Outdoor Air Enthalpy Sensor HH57AC081
Indoor Air Enthalpy Sensor HH57AC081
Return Air CO2Sensor (4 to 20 mA) CRCBDIOX005A00
CO2Room Sensor (4 to 20 mA) 33ZCSENCO2 or
CGCDXSEN004A00
Aspirator Box for Duct Mount
CO2Sensor (4 to 20 mA)
33ZCASPCO2 or
CGCDXASP001A00
Space Temperature and CO2Room Sensor
with Override (4 to 20 mA) 33ZCT55CO2
Space Temperature and CO2Room Sensor
with Override and Set Point (4 to 20 mA) 33ZCT56CO2
Fig. 1 - EconoMi$er X Component Locations —
(3 to 6 Ton Shown)
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.
!
Outside Air
Temperature
Sensor
Actuator
(Hidden)
Wiring
Harness

3
Fig. 2 - Typical Outdoor-Air Section
Access Panel Locations
Compressor
Access Panel
Outdoor-Air Opening and
Indoor Coil Access Panel
Filter Access Panel
Fig. 3 - Hood Assembly
AB
CHood Top and
Side Assembly
Hood Divider
D
Fig. 4 - Filter Installation
Hood Top Filter Clip
Outside Air
Cleanable
Aluminum Filter
Barometric
Airow
Hood
Divider
ECONOMIZER P/N A B C D SHIP WT.
CRECOMZR067A00 33.37” 17.43” 19.05” 29.5” 55 lb
CRECOMZR069A00 40.37” 22.28” 24.48” 36.27” 80lb
CRECOMZR071A00 52.92” 27.03” 33.41” 49.92” 98lb
NOTE: The CRECOMZR071A00 hood has 2 aluminum lters and a
hood lter divider that installs between the lters. (See Fig. 5A.)
Fig. 5 - EconoMi$er X Installed in HVAC Unit
(3 to 6 Ton Shown)
Fig. 4A - Hood for Extra Large Cabinet
Hood Filter
Divider
HVAC Unit Filters
Insert
Screw in
EconoMi$er X
Flanges
Wiring
Harness
EconoMi$er X
Fig. 6 - Rear EconoMi$er X Flange Installation
(Small and Large Cabinet)
Unit Filter
Rack
Unit Base
EconoMi$er IV
Hold Down Tab
EconoMi$er IV Rear Flange
EconoMi$er IV

4
Fig. 7 - Harness Detail
W7220
Controller
Control
Box
Coil
Filter
Economizer
14. While everything is open install and wire any other accessories
and/or sensors as applicable and convenient, per their installation
instructions and/or the Conguration section of this instruction.
Some accessories require that unit ducting already be installed.
NOTE: If also installing a power exhaust accessory, skip step 16 and
follow the power exhaust instructions instead.
16. Install the EconoMi$er X hood over the EconoMi$er X. Use screws
provided. (See Fig. 10.)
17. The W7220 EconoMi$er X controller is shipped mounted to a
bracket. Install the controller / bracket in the top left corner of the
unit control box as shown in wiring diagram, Fig. 8. Screw in place
through pre-punched holes.
18. Connect the plugs coming from the controller as shown in wiring
diagram, Fig. 7 and 8.
19. Adjust controller settings (minimum position, outside air, etc.) per
instructions detailed later in this instruction.
20. Follow all local and other applicable codes.
Fig. 8 - Typical EconoMi$er X Wiring Diagram

5
Fig. 9 - Typical Indoor Fan Motor
Access Panel Locations
Indoor Fan Motor
Access Panel
Heating Access
Panel
Thermostat
Connection
Access Panel
Center Post
Fig. 10 - Mixed Air Sensor Placement
Supply Air
Temperature
Sensor
Mounting
Location
Supply Air
Temperature
Sensor
To Unit
Control Box
EconoMi$er X
EconoMi$er X is a low leak economizer system which is available for
2-stage cooling units equipped with the SAV 2-speed Variable Frequency
Drive (VFD) system.
The eld-installed accessory consist of the following:
• Low leak economizer assembly
• W7220 economizer controller
• 20K dry bulb temperature control sensor
W7220 Economizer
The economizer controller used on electro mechanical units is a
Honeywell W7220 which is to be located in the RTU base unit’s Control
Box. See the Installation Instruction for your base unit for the location of
the Control Box access panel.
The W7220 controller provide the following:
• 2-line LCD interface screen for setup, conguration and
troubleshooting.
• On-board fault detection and diagnostics
• Sensor failure loss of communications identication
• Automatic sensor detection
• Capabilities for use with multiple-speed indoor fan systems
User Interface
The user interface consists of a LCD display and a 4-button keypad on
the front of the economizer controller.
Fig. 11 - W7220 Controller
Keypad
The four navigation button (see Fig. 3) are used to scroll through the
menus and menu items, select menu items, and to change parameter and
conguration settings.
Using the Keypad with Menus
To use the keypad when working with menus:
• Press the ▲ (Up arrow) button to move to the previous menu.
• Press the ▼ (Down arrow) button to move to the next menu.
• Press the (Enter) button to display the rst item in the currently
displayed menu.
• Press the ↑ (Menu Up/Exit) button to exit a menu’s item and
return to the list of menus.
Using the Keypad with Settings and Parameters
To use the keypad when working with Setpoints, System and Advanced
Settings, Checkout tests and Alarms:
1. Navigate to the desire menu.
2. Press the (Enter) button to display the rst item in the currently
displayed menu.
3. Use the ▲ and ▼ buttons to scroll to the desired parameter.
4. Press the (Enter) button to display the value of the currently
displayed item.
5. Press the ▲ button to increase (change) the displayed parameter
value.
6. Press the ▼ button to decrease (change) the displayed parameter
value.
NOTE: When values are displayed, pressing and holding the
▲ or ▼ button causes the display to automatically increment.
7. Press the (Enter) button to accept the displayed value and store it
in nonvolatile RAM.
8. “CHANGE STORED” displays.
9. Press the (Enter) button to return to the current menu parameter.
10. Press the ↑ (Menu Up/Exit) button to return to the previous
menu.
Menu Structure
Table 5 illustrates the complete hierarchy of menus and parameters for
the EconoMi$er X system.
The Menus in display order are:
• STATUS
• SETPOINTS
• SYSTEM SETUP
• ADVANCED SETUP
• CHECKOUT
• ALARMS

6
Table 5 ─Menu Structure a
IMPORTANT: Table 5 illustrates the complete hierarchy. Your menu parameters may be different depending on your conguration.
For example if you do not have a DCV (CO2) sensor, then none of the DCV parameters appear.
Menu Parameter
Parameter
Default
Value
Parameter
Range and IncrementbNotes
STATUS ECON AVAIL NO YES/NO YES = economizing available; the system can use
outside air for free cooling when required
ECONOMIZING NO YES/NO YES = outside air being used for 1st stage cooling
OCCUPIED NO YES/NO YES = OCC signal received from space thermostat
or unitary controller
YES = 24 Vac on terminal OCC.
NO = 0 Vac on terminal OCC.
HEAT PUMP n/acCOOL
HEAT
Displays COOL or HEAT when system is set to heat pump
(Non-conventional)
COOL Y1─IN OFF ON/OFF Y1─I signal from space thermostat or unitary controller for
cooling stage 1.
ON = 24 Vac on terminal Y1─I
OFF = 0 Vac on terminal Y1─I
COOL Y1─OUT OFF ON/OFF Cool stage 1 Relay Output to stage 1 mechanical cooling
(Y1─OUT terminal)
COOL Y2─IN OFF ON/OFF Y2─I signal from space thermostat our unitary controller for
second stage cooling.
ON = 24 Vac on terminal Y2─I
OFF = 0 Vac on terminal Y2─I
COOL Y2─OUT OFF ON/OFF Cool Stage 2 Relay Output to mechanical cooling
(Y2─OUT terminal)
MA TEMP _ _ . _oF 0 to 140oF Displays value of measured mixed air from MAT sensor.
Displays _ _ . _ oF if not connected, short or out-of-range.
DA TEMP _ _ . _oF 0 to 140oF Displays when Discharge Air sensor is connected and
displays measured discharge temperature.
Displays _ _ . _oF if sensor sends invalid value, if not con-
nected, short or out-of-range.
OA TEMP _ _ . _oF -40 to 140oF Displays measured value of outdoor air temperature.
Displays _ _ . _oF if sensor sends invalid value, short or
out-of-range.
OA HUM _ _% 0 to 100% Displays measured value of outdoor humidity from OA
sensor.
Displays _ _% if not connected short, or out-of-range.
RA TEMP _ _ . _oF 0 to 140oF Displays measured value of return air temperature from
RAT sensor.
Displays _ _ . _oF if sensor sends invalid value, if not
connected, short or out-of-range
RA HUM _ _% 0 to 100% Displays measured value of return air humidity from RA
sensor.
Displays _ _% if sensor sends invalid value, if not con-
nected, short or out-of-range
IN CO2 _ _ _ppm 0 to 2000 ppm Displays value of measured CO2from CO2sensor. Invalid if
not connected, short or out-of-range
DCV STATUS n/a ON/OFF Displays ON if above setpoint and OFF if below setpoint,
and ONLY if a CO2sensor is connected.
DAMPER OUT 2.0V 2.0 to 10.0V Displays voltage output to the damper actuator.
EXH1 OUT OFF ON/OFF Output of EXH1 terminal:
ON = relay closed
OFF = relay open
EXH2 OUT OFF ON/OFF Output of AUX terminal; displays only if AUX = EXH2
ERV OFF ON/OFF Output of AUX terminal; displays only if AUX = ERV
MECH COOL ON 0 0,1, or 2 Displays stage of mechanical cooling that is active.

7
Table 5 ─Menu Structurea(cont)
Menu Parameter
Parameter
Default
Value
Parameter
Range and IncrementbNotes
SETPOINTS MAT SET 53oF 38 to 65oF;
increment by 1
Setpoint determines where the economizer will modulate the OA
damper to maintain the mixed air temperature.
LOW T LOCK 32oF -45 to 80oF;
increment by 1
Setpoint determines outdoor temperature when the mechanical cooling
cannot be turned on. Commonly referred to as the Compressor lockout.
DRYBLB SET 63oF 48 to 80oF;
increment by 1
Setpoint determines where the economizer will assume outdoor air
temperature is good for free cooling; e.g.; at 63oF unit will economize at
62oF and below and not economize at 64oF and above. There is a 2oF
deadband.
ENTH CURVE ES3 ES1,ES2,ES3,ES4, or
ES5
Enthalpy boundary “curves” for economizing using single enthalpy
DCV SET 1100ppm 500 to 2000ppm;
increment by 100
Displays only if CO2sensor is connected. Setpoint for Demand Control
Ventilation of space. Above the setpoint, the OA dampers will modulate
open to bring in additional OA to maintain a space ppm level below the
setpoint.
MIN POS 4.4 V 2 to 10 Vdc Displays ONLY if a CO2sensor is NOT connected
VENTMAX With 2-speed
fan units VENTMAX L (low
speed fan) and VENTMAX
H (high speed fan) settings
are required
4.4 V 2 to 10 Vdc
or
100 to 9990 cfm
increment by 10
Displays only if a CO2sensor is connected. Used for Vbz (ventilation
max cfm) setpoint. Displays 2 to 10 V if <3 sensors (RA,OA, and MA).
In AUTO mode dampers controlled by CFM
VENTMAX L 6 V
VENTMAX H 4.4 V
VENTMIN With 2-speed
fan units VENTMIN L (low
speed fan) and VENTMIN
H (high speed fan) set
2.8 V 2 to 10 Vdc
or 100 to 9990 cfm
increment by 10
Displays only if a CO2sensor is connected. Used for Ba (ventilation min
cfm) setpoint. Displays 2 to 10 V if <3 sensors (RA, OA, and MA). Va
is only set if DCV is used. This is the ventilation for less than maximum
occupancy of the space. In AUTO mode dampers controlled by CFM.
VENTMIN L 3.7 V
VENTMIN H 2.8 V
ERV OAT SP 32oF 0 to 50oF;
increment by 1
Only when AUX1 O = ERV
EXH1 SET With 2-speed
fan units Exh1 L (low speed
fan) and Exh1 H (high
speed fan) settings are
required
50% 0 to 100%;
increment by 1
Setpoint for OA damper position when exhaust fan 1 is powered by the
economizer.
Exh1 L 65%
Exh1 H 50%
EXH2 SET With 2-speed
fan units Exh2 L (low speed
fan) and Exh2 H (high
speed fan) settings are
required
75% 0 to 100%;
increment by 1
Setpoint for OA damper position when exhaust fan 2 is powered by the
economizer. Only used when AUX is set to EHX2.
Exh2 L 80%
Exh2 H 75%
SYSTEM
SETUP
INSTALL 01/01/10 Display order = MM/DD/YY
Setting order = DD, MM, then YY.
UNITS DEG oFoF or oC Sets economizer controller in degrees Fahrenheit or Celsius
EQUIPMENT CONV Conventional or HP CONV = conventional; HP O/B = Enable Heat Pump mode. Use AUX2 I
for Heat Pump input from thermostat or controller.
AUX2 I W SD/W or HP(O)/HP(B) In CONV mode: SD + Enables conguration of shutdown (default); W
= Informs controller that system is in heating mode. In HP O/B mode:
HP(O) = energize heat pump on Cool (default); HP(B) = energize heat
pump on heat.
FAN TYPE 2 speed 1 speed/2 speed Sets the economizer controller for operation of 1 speed or 2 speed
supply fan.
FAN CFM 5000cfm 100 to 15000 cfm;
increment by 100
This is the capacity of the RTU. The value is found in the Project
Submittal documents for the specic RTU.
AUX OUT NONE NONE
ERV
EXH2
SYS
• NONE = not congured (output is not used)
• ERV = Energy Recovery Ventilation
• EXH2 = second damper position relay closure for second exhaust fan
• SYS = use output as an alarm signal
OCC INPUT INPUT or ALWAYS When using a setback thermostat with occupancy out (24 Vac), the 24
Vac is input “INPUT” to the OCC terminal. If no occupancy output from
the thermostat then change program to “ALWAYS” OR add a jumper
from terminal R to OCC terminal

8
Table 5 ─Menu Structurea(cont)
Menu Parameter
Parameter
Default
Value
Parameter
Range and IncrementbNotes
SYSTEM
SETUP
FACTORY DEFAULT NO NO or YES Resets all set points to factory defaults when set to YES. LCD will
briey ash YES and change to NO but all parameters will change to
the factory default values.
ADVANCED
SETUP
MA LO SET 45oF 35 to 55oF;
Incremented by 1o
Temperature to achieve Freeze Protection (close damper and alarm if
temperature falls below setup value).
FREEZE POS CLO CLO or MIN Damper position when freeze protection is active (closed or MIN POS).
CO2 ZERO 0ppm 0 to 500 ppm;
Increment by 10
CO2ppm level to match CO2sensor start level.
CO2 SPAN 2000ppm 1000 to 3000 ppm;
Increment by 10
CO2ppm span to match CO2sensor.
STG3 DLY 2.0h 0 min, 5 min, 15 min,
then 15 min intervals.
Up to 4 h or OFF
Delay after stage 2 cool has been active. Turns on 2nd stage of cooling
when economizer is 1st stage and mechanical cooling is 2nd stage.
Allows three stages of cooling, 1 economizer and 2 mechanical.
OFF = no Stage 3 cooling
SD DMPR POS CLO CLO or OPN Indicates shutdown signal from space thermostat or unitary controller.
When controller receives 24 Vac input on the SD terminal in conven-
tional mode, the OA damper will open if programmed for OPN and OA
damper will close if programmed for CLO. All other controls, e.g., fans,
etc. will shut off.
DCVCAL ENA MAN MAN (manual)
AUTO
Turns on the DCV automatic control of the dampers. Resets ventilation
based on the RA, OA, and MA sensor conditions. Requires all 3 RA,
OA, and MA sensors.
MAT T CAL 0.0oF +/-2.5oF Allows for the operator to adjust for an out of calibration temperature
sensor.
OA T CAL 0.0oF +/-2.5oF Allows for the operator to adjust for an out of calibration temperature
sensor.
OA H CAL 0% RH +/-10% RH Allows for operator to adjust for an out of calibration humidity sensor.
RA T CAL 0.0oF +/-2.5oF Allows for the operator to adjust for an out of calibration temperature
sensor.
RA H CAL 0% RH +/-10% RH Allows for operator to adjust for an out of calibration humidity sensor.
DA T CA; 0.0oF +/-2.5oF Allows for the operator to adjust for an out of calibration temperature
sensor.
CHECKOUT DAMPER VMIN─HS n/a n/a Positions damper to VMIN position
DAMPER VMAX─HS n/a n/a Positions damper to VMAX position
DAMPER OPEN n/a n/a Position damper to the full open position.
Exhaust fan contacts enable during the DAMPER OPEN test. Make
sure you pause in the mode to allow exhaust contacts to energize due
to the delay in the system.
DAMPER CLOSE n/a n/a Positions damper to the fully closed position
CONNECT Y1─O n/a n/a Closes the Y1─O relay (Y1─O)
CONNECT Y2─O n/a n/a Closes the Y2─O relay (Y2─O)
CONNECT AUX n/a n/a Energizes the AUX output. If Aux setting is:
• NONE ─ not action taken
• ERV ─ 24 Vac out. Turns on or signals an ERV that the conditions
are not good for economizing but are for ERV operation.d
• SYS ─ 24 Vac out. Issues a system alarm
ALARMS(_)MA T SENS ERR n/a n/a Alarms display only when they are active. The menu title “ALARMS(_)”
includes the number of active alarms in parenthesis ( ).
CO2 SENS ERR n/a n/a
OA T SENS ERR n/a n/a
DA ENTHL ERR n/a n/a
SYS ALARM n/a n/a When AUX is set to SYS and there is any alarm (e.g., failed sensors,
etc.), the AUX terminal has 24 Vac out.
NOTE: The alarms listed are examples. Additional alarms display depending on the parameter settings and conguration.
For example if you do not have a DCV (CO2) sensor, then none of the DCV parameters appear.
a Table 2 illustrates the complete hierarchy. Your menu parameters may be different depending on your conguration.
For example if you do not have a DCV (CO2) sensor, then none of the DCV parameters appear
b When values are displayed, pressing and holding the ▲ or ▼ button causes the display to automatically increment.
cn/a = not applicable
dERV Operation: When in Cooling mode AND the conditions are NOT OK for economizing - the ERV terminal will be energized.
In the Heating mode the ERV terminal will be energized when the OA is below the ERV OAT setpoint in the setpoint menu.

9
Checkout Tests
Use the Checkout menu (see Table 5 on page 6) to test the damper op-
eration and any congured outputs. Only items that are congured are
shown in the Checkout menu.
NOTE: See User Interface on page 3 for information about menu navi-
gation and use of the keypad.
To perform a Checkout test:
1. Scroll to the desired test in the Checkout menu using the ▲ and ▼
buttons.
2. Press the button to select the item.
3. RUN? appears.
4. Press the button to start the test.
5. The unit pauses and then displays IN PROGRESS.
6. When the test is complete, DONE appears.
7. When all desired parameters have been tested, press the ↑ (Menu
up) button to end the test.
Checkout test can be performed at any time during the operation of the
CAUTION
EQUIPMENT DAMAGE HAZARD
Failure to follow this caution may result in damage to equipment
Be sure to allow enough time for compressor startup and shutdown
between checkout tests so that you do not short-cycle the compressors.
!
system as a test that the system is operable.
SETUP AND CONFIGURATION
W7220 Economizer Module Wiring
Use Fig. 12 and Tables 6 and 7 to locate the wiring terminals for the
economizer module.
NOTE: The four terminal blocks are removable. You can slide out each
terminal block, wire it, and then slide it back into place.
Fig. 12 - W7220 Economizer Module Terminal
Connection Labels
Table 6 - Economizer Module -
Left Hand Terminal Blocks
Table 7 - Economizer Module -
Right Hand Terminal Blocks
Time-out and Screen Saver
When no buttons have been pressed for 10 minutes, the LCD displays a
screen saver, which cycles through the Status items. Each Status item
displays in turn and cycles to the next item after 5 seconds.
Label Type Description
Top Left Terminal Block
MAT
MAT
20k NTC
and COM
Mixed Air Temperature Sensor
(Polarity insensitive connections)
OAT
OAT
20k NTC
and COM
Outdoor Air Temperature Sensor
(Polarity insensitive connection)
S─BUS
S─BUS
S─BUS
(Sylk Bus)
Enthalpy Control Sensor
(Polarity insensitive connection)
Bottom Left Terminal Block
IAQ 2─10 2─10 Vdc Air Quality Sensor Input
(e.g. CO2sensor)
IAQ COM COM Air Quality Sensor Common
IAQ 24V 24 Vac Air Quality Sensor 24 Vac Source
ACT 2─10 2─10 Vdc Damper Actuator Output (2─10 Vdc)
ACT COM COM Damper Actuator Output Common
ACT 24V 24 Vac Damper Actuator 24 Vac Source
Label Type Description
Top Right Terminal Block
n/a The rst terminal is not used
AUX2 I 24 Vac IN Shut Down (SD) or Heat (W)
Conventional only
and
Heat Pump Changeover (O?B) in
Heat Pump mode.
OCC 24 Vac IN Occupied / Unoccupied Input
E - GND E─GND Earth Ground - System Required
EXH1 24 Vac OUT Exhaust Fan 1 Output
AUX1 O 24 Vac OUT Programmable:
Exhaust fan 2 output
or
ERV
or
System alarm output
Bottom Right Terminal Block
Y2─1 24 Vac IN Y2 in - Cooling Stage 2 Input from
space thermostat
Y2─O 24 Vac OUT Y2 out - Cooling Stage 2 Output to
stage 2 mechanical cooling
Y1─I 24 Vac IN Y1 in - Cooling Stage 2 Input from
space thermostat
Y1─O 24 Vac OUT Y1 out - Cooling Stage 2 Output to
stage 2 mechanical cooling
C COM 24 Vac Common
R 24 Vac 24 Vac Power (Hot)

10
Fig. 13 - Single Enthalpy Curve boundaries
Table 8 - Single Enthalpy and Dual Enthalpy High Limit Curves
Enthalpy Settings
When the OA temperature, enthalpy and dew point are below the
respective setpoints, the Outdoor Air can be used for economizing. Fig.
13 shows the new single enthalpy boundaries in the W7220. There are
5 boundaries (setpoints ES1 thru ES5), which are dened by dry bulb
temperature, enthalpy and dew point.
Refer to Table 8 for ENTH CURVE setpoint values.
To use enthalpy the W7220 must have a HH57AC081 enthalpy control
sensor for OA. The W7220 calculates the enthalpy and dewpoint using
the OA temperature and humidity input from the OA sensor. When
the OA temperature, OA humidity and OA dew point are all below the
selected boundary, the economizer sets the economizing mode to YES,
economizing is available.
When all of the OA conditions are above the selected boundary, the
conditions are not good to economize and the mode is set to NO.
Enthalpy
Curve
Temp.
Dry Bulb (oF)
Temp.
Dewpoint (oF)
Enthalpy
(btu/lb/da)
Point P1 Point P2
Temp (oF) Humidity %RH Temp (oF) Humidity
%RH
ES1 80.0 60.0 28.0 80.0 36.8 66.3 80.1
ES2 75.0 57.0 26.0 75.0 39.6 63.3 80.0
ES3 70.0 54.0 24.0 70.0 42.3 59.7 81.4
ES4 65.0 51.0 22.0 65.0 44.8 55.7 84.2
ES5 60.0 48.0 20.0 60.0 46.9 51.3 88.5
HL 86.0 66.0 32.4 86.0 38.9 72.4 80.3
Fig. 13 shows the 5 current boundaries. There is also a high limit
boundary for differential enthalpy. The high limit boundary is ES1
when there are no stages of mechanical cooling energized and HL (high
limit) when a compressor stage is energized.
Table 8 provided the values for each boundary limit.
Enthalpy control Sensor Conguration
The Enthalpy Control sensor (Part Number: HH57AC081)
communicates with the W7220 Economizer controller on the two-wire
communications bus and can either be wired using a two pin header or
using a side connector. This sensor is used for all OAT (Outdoor Air
Temperature), RAT (Return Air Temperature), and DAT (discharge Air
Temperature), depending on how its three position DIP switch is set.
Use Fig. 13 and Table 9 to locate the wiring terminals for each Enthalpy
Control sensor.
Use Fig. 13 and Table 10 to set the DIP switches for the desired use of
the sensor.

11
Fig. 14 - Enthalpy Control Sensor,
Dimensions and DIP Switch Location
Table 9 - Enthalpy Control Sensor
Wiring Terminationsa
Table 10 - Enthalpy Control Sensor DIP Switch
Terminal Type Description
Nbr Label
1S─BUS S─BUS S─Bus Communications
(Enthalpy Control Sensor Bus)
2S─BUS S─BUS S─Bus Communications
(Enthalpy Control Sensor Bus)
Use DIP Switch Positions for Switches 1,2, & 3
1 2 3
DAaOFF ON OFF
RAbON OFF OFF
OAcOFF OFF OFF
a DA = Discharge Air or Supply Sensor
b RA = Return Air
c OA = Outside Air
OPERATION
Cooling, Unit with EconoMi$er X
For Occupied mode operation of EconoMi$er X, here must be a 24-v
signal at terminals R and OCC (provided through PL6-3 from the unit’s
IFC coil). Removing the signal at OCC places the EconoMi$er X con-
trol in Unoccupied mode.
During Occupied mode operation, indoor fan operation will be accom-
panied by economizer dampers moving to Minimum Position setpoint
for ventilation. If indoor fan is off, dampers will close. During Unoc-
cupied mode operation, dampers will remain closed unless a Cooling
(by free cooling) or DCV demand is received.
When free cooling using outside air is not available, the unit cooling
sequence will be controlled directly by the space thermostat. Outside
air damper position will be closed or Minimum Position as determined
by Occupancy mode and fan signal.
When free cooling is available as determined by the appropriate change-
over command (dry bulb, outdoor enthalpy, differential dry bulb or dif-
ferential enthalpy), a call for cooling (Y1 closes at the thermostat) will
cause the economizer control to modulate the dampers open and closed
to maintain the unit supply air temperature at 50 to 55oF. Compressor
will not run.
During free cooling operation, a supply air temperature (SAT) above
50oF will cause the dampers to modulate between Minimum Position
setpoint and 100% open. With SAT from 50oF to 45oF, the dampers will
maintain at the Minimum Position setting. With SAT below 45oF, the
outside air dampers will be closed. When SAT rises to 48oF, the damp-
ers will re-open to Minimum Position setting.
Should 100% outside air not be capable of satisfying the space tempera-
ture, space temperature will rise until Y2 is closed. The economizer
control will call for compressor operation. Dampers will modulate to
maintain SAT at 50 to 55oF concurrent with Compressor 1 operation.
The Low Ambient Lockout Thermostat will block compressor operation
with economizer operation below 42oF outside air temperature.
When space temperature demand is satised (thermostat Y1 opens), the
dampers will return to Minimum Damper position if indoor fan is run-
ning or fully closed if fan is off.
If accessory power exhaust is installed, the power exhaust fan motors
will be energized by the economizer control as the dampers open above
the EXH1 SET setpoint and will be-energized as the dampers close
below the EXH1 SET setpoint.
Damper movement from full closed to full open (or vice versa) will take
between 1-1/2 and 2-1/2 minutes.
Heating with EconoMi$er X
During Occupied mode operation, indoor fan operation will be ac-
companied by economizer dampers moving to Minimum Position
setpoint for ventilation. If indoor fan is off, dampers will close. During
Unoccupied mode operation, dampers will remain closed unless a DCV
demand is received.
When the room temperature calls for heat (W1 closes), the heating
controls are energized.
Demand Controlled Ventilation
If a eld-installed CO2sensor is connected to the EconoMi$er X
control, a Demand controlled Ventilation strategy will operate automati-
cally. As the CO2level in the space increases above the setpoint (on
the EconoMi$er X controller), the minimum position of the dampers
will be increased proportionally, until the Maximum Ventilation setting
is reached. As the space CO2level decreases because of the increase in
fresh air, the outdoor damper will follow the higher demand condition
from the DCV mode or from the free cooling mode.
DCV operation is available in Occupied and Unoccupied periods with
EconoMi$er X. However, a control modication will be required on the
48TC units to implement the Unoccupied period function.

12
Table 11 - Damper Position Control, 2-Speed Fan Motor, Economizer Cooling Not Available
INPUT
OCC 0 - V 24 - V 24 - V 24 - V 24 - V
Y1 0 - V 0 - V 24 - V 24 - V 0 - V
Y2 0 - V 0 - V 0 - V 24 - V 0 - V
W1 0 - V 0 - V 0 - V 0 - V 24 - V
SUPPLY FAN
MOTOR SPEED OFF LOW LOW HIGH HIGH
DAMPER POSITION
NO CI2 SENSOR CLOSED MIN POS MIN POS MIN POS MIN POS
W/ CO2 SENSOR CLOSED
FROM
VENTMIN L
TO
VENTMAX L
FROM
VENTMIN L
TO
VENTMAX L
FROM
VENTMIN H
TO
VENTMAX H
FROM
VENTMIN H
TO
VENTMAX H
TROUBLESHOOTING
Power Loss (Outage or Brownout)
All setpoints and advanced settings are restored after any power loss
or interruption, as all settings are stored in the Economizer controller’s
non-volatile ash memory.
NOTE If the power goes below 18 Vac, the W7220 controller module
assumes a power loss and the 5 minute power up delay will become
functional when power returns above 18 Vac.
Alarms
The Economizer module provides alarm messages that display on the
2-line LCD
NOTE: Upon power up, the module waits several seconds before
checking for alarms. This allows time for all the congured devices
(e.g. sensors, actuator) to become operational.
If one or more alarms are present and there has been no keypad activity
for at least 5 minutes, the Alarms menu displays and cycles through the
active alarms.
You can also navigate to the Alarms menus at any time.
See Table 5 on Page 6 for the Alarms menu.
Clearing Alarms
Once the alarm has been identied and the cause has been removed (e.g.
replaced faulty sensor). The can be cleared from the display.
To clear an alarm, perform the following:
1. Navigate to the desired alarm.
2. Press the button.
3. ERASE? displays.
4. Press the button.
5. ALARM ERASED displays.
6. Press the ↑ (Menu up/Exit) button to complete the action and
return to the previous menu.
NOTE: If the alarm still exists after you clear it, it is redisplayed
within 5 seconds.

13
Fig. 15 - 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 STATIC PRESSURE (in. wg)
Small
Cabinet
Large and
Extra
Large
Cabinet
Fig. 16 - Return Air Pressure Drop
0
1000
2000
3000
4000
5000
6000
00.1 0.2 0.3 0.4
RETURN AIR FLOW (CFM)
RETURN DUCT STATIC PRESSURE DROP (in. wg)
Small Cabinet
Large Cabinet
Extra Large Cabinet
Table 12 - Operating Issues and Concerns
Issue or Concern Possible Cause and Remedy
My outdoor temperature reading on the
STATUS menu is not accurate
Check the sensor wiring:
• Enthalpy sensors are to be wired to the S-Bus terminals.
• Temperature sensors are to be wired to the OAT and MAT terminals.
If my enthalpy sensor drifts in accuracy
over time, can I re-calibrate it?
The sensor is not able to be re-calibrated in the eld. However there is a menu
item under the ADVANCED menu where you are able to input a limited off set in
temperature and humidity for each sensor you have connected to the economizer.
Can I go back to factory defaults and start
over?
Under the SYSTEM SETUP menu you can change the setpoints to the factory
defaults.
Will I be able to see the LCD screen when it
is in the unit?
The LCD screen has a backlight that is always illuminated.
What is a good setpoint for the Mixed Air
Temperature (MAT)?
The mixed are temperature is the temperature of air that you want to supply to the
space. In a commercial building, this is between 50 to 55oF (10 to 13oC). The mixed
are is the mixing of the return air and the outdoor air.
I am using enthalpy sensors. Why did
the control ask me to input a dry bulb
changeover temperature?
In the even the humidity sensor in the enthalpy sensors fails, the backup algorithm in
the control is to default to the temperature sensor in the enthalpy sensor.
In checkout, the outdoor damper closes when
I command it to open.
Check the actuator linkage or rotation. In the CHECKOUT mode, the outdoor damper
should drive open or closed with the return air damper having the opposite effect.
How do I set my minimum position? The minimum position is set using the VENTMIN and VENTMAX setup in the
SETPOINTS menu. VENTMIN is the minimum ventilation required when using an
occupancy sensor and VENTMAX is the minimum ventilation when not using an
occupancy sensor for Demand Control Ventilation. The VENTMAX position is set the
dame as with the potentiometer on the analog economizers and is the output voltage
to the damper actuator. The range is 2 Vdc closed OA damper and 10 Vdc open OA
damper.
What if my damper does not go completely
closed in the checkout operation?
Check the damper linkage or hub to make sure the damper is able to close com-
pletely.
How do I set the OCC? There are two setting for the OCC setting, INPUT and ALWAYS, INPUT is from the
space thermostat, if it has an occupancy output. ALWAYS is the unit in the occupied
mode, if the economizer is powered (fan on).
Does the economizer save my program val-
ues if the unit loses power?
Yes, once the changes are stored in the controller they will be stored until they are
changed by the operator.
If the unit is left in checkout, how long will the
unit stay in checkout mode without input?
The unit will remain in checkout for 10 minutes, then return to normal operation.

14
Copyright 2012 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-CRECOMZR67-01Edition Date: 5/12
Replaces: New