Carrier CRECOMZR077A00 User manual

Manufacturer reserves the right to discontinue, or change at any time, specifications or designs without notice and without incurring obligations.
Catalog No. 04-53500253-01 Printed in U.S.A. Form No. IIK-CRECOMZR77-04 Pg 1 10-23 Replaces: IIK-CRECOMZR77-03
Installation Instructions
Part No. CRECOMZR077A00, CRECOMZR079A00,CRECOMZR081A00
CONTENTS
Page
SAFETY CONSIDERATIONS . . . . . . . . . . . . . . . . . . . 1
GENERAL . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2
ACCESSORIES LIST . . . . . . . . . . . . . . . . . . . . . . . . . . 4
INSTALLATION . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5
INSTRUCTIONS FOR 48/50LC 
07-12 UNITS ONLY . . . . . . . . . . . . . . . . . . . . . . . . 12
Installing Optional HH57AC081/1185124 Single
Outside Air Enthalpy Sensor . . . . . . . . . . . . . . . . 15
Installing Differential Return Air Sensor . . . . . . . . . 16
California’s Title 24 High Temperature Limit
Settings . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 17
Demand Controlled Ventilation (DCV) . . . . . . . . . . 17
Remote (Downstairs) Monitoring of Controller’s 
Fault Detection and Diagnostics . . . . . . . . . . . . . 17
GENERAL W7220 CONTROLLER 
AND SENSOR INFORMATION . . . . . . . . . . . . . . . 19
W7220 Economizer . . . . . . . . . . . . . . . . . . . . . . . . . . 19
User Interface . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 19
Keypad . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 19
Using the Keypad with Menus . . . . . . . . . . . . . . . . . 19
Using the Keypad with Settings and Parameters . . 19
Menu Structure . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 19
Programming the W2770 Controller . . . . . . . . . . . . 19
• SETPOINTS
• SYSTEM SETUP
Checkout Tests . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 25
SETUP AND CONFIGURATION . . . . . . . . . . . . . . . . 25
W7220 Economizer Module Wiring . . . . . . . . . . . . . 25
Time-out and Screen Saver . . . . . . . . . . . . . . . . . . . 26
START-UP AND OPERATION . . . . . . . . . . . . . . . . . . 26
Cooling with EconoMi$er X . . . . . . . . . . . . . . . . . . . 26
Heating with EconoMi$er X . . . . . . . . . . . . . . . . . . . 26
TROUBLESHOOTING . . . . . . . . . . . . . . . . . . . . . . . . 27
Power Loss (Outage or Brownout) . . . . . . . . . . . . . 27
Alarms . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 27
• CLEARING ALARMS
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.
WARNING
ELECTRIC SHOCK HAZARD
Failure to follow this warning could result in personal injury,
property damage, or death.
Before performing service or maintenance operations on 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 and amperage listed on the unit rating plate.
If any wiring changes are required, first be sure to remove
power from the economizer module before starting work. Pay
particular attention to verifying the power connection (24 vac).
CAUTION
PERSONAL INJURY 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 air conditioning equipment.
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.
Small Rooftop Products
Select 3 to 15 Tons
(48/50LC 14 Not Included)
Horizontal EconoMi$er X Accessory

2
GENERAL
The EconoMi$er®X system utilizes the latest technology avail-
able for integrating the use of free cooling with mechanical cool-
ing for packaged rooftop units. The code compliant W7220 con-
trol system optimizes energy consumption, zone comfort, and
equipment cycling by operating the compressors when the out-
door-air temperature is too warm, integrating the compressor
with outdoor air when free cooling is available, and locking out
the compressor when outdoor-air temperature is too cold. De-
mand controlled ventilation is supported.
This EconoMi$er X can be used with 1 or 2 speed indoor fan mo-
tor units. (All other speed settings listed are for future use.)
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 fault de-
tection and diagnostics (FDD), an outdoor air temperature sen-
sor, and mixed air temperature sensor (also called supply air
temperature sensor). Outdoor enthalpy, indoor (return) dry bulb
or enthalpy, and CO2sensors are available for field installation.
Standard integrated barometric relief dampers provide natural
building pressurization control. An optional power exhaust system
is available for applications requiring even greater exhaust capa-
bilities. The power exhaust set point is adjustable at the
EconoMi$er X controller.
See Tables 1-3 for package usage. See Table 4 for package con-
tents. See Table 5 for sensor usage.
IMPORTANT: These economizers meet all the economizer re-
quirements as laid out in California’s Title 24 mandatory section
120.2 (fault detection and diagnostics).
IMPORTANT: Read these instructions completely before at-
tempting to install accessory economizer.
Table 1 — Carrier Package Usage
MODEL NUMBER ECONOMI$ER X
PART NUMBER
Small Cabinet
48/50FC, 50FCQ 04-07
48/50GC, 50GCQ 04-06
48/50HC, LC 04-06
50HCQ 04-06
48/50KC 04-06
50KCQ 04-06
48/50TC 04-07
50TCQ 04-07
CRECOMZR077A00
Large Cabinet
48/50FC 08-14
50FCQ 08-12
48/50GC 07-12
50GCQ 07-09
48/050HC 07-12
50HCQ 07-09
48/50LC 07
48/50TC 08-14
50TCQ 08-12
CRECOMZR079A00
Extra Large Cabinet
48/50FC 16
50FCQ 14
48/50GC 14
50GCQ 12
48/50HC 14
50HCQ 12
48/50LC 08-12
48/50TC 16
50TCQ 14
CRECOMZR081A00
Table 2 — Bryant Package Usage
MODEL NUMBER ECONOMI$ER X
PART NUMBER
Small Cabinet
582K/559K 04-07
547K 04-07
581K/551K 04-06
549K 04-06
581J/551J/549J 04-06
582J/559J/547J 04-06
580J/558J/548J 04-07
CRECOMZR077A00
Large Cabinet
582K/559K 08-14
547K 08-12
581K/551K 07-12
549K 07-09
581J/551J 07-12
549J 07-09
580J/558J 08-14
548J 08-12
CRECOMZR079A00
Extra Large Cabinet
582K/559K 16
547K 14
581K/551K 14
549K 12
581J/551J 14
549J 12
580J/558J 16
548J 14
CRECOMZR081A00

3
Table 3 — ICP Package Usage
MODEL NUMBER ECONOMI$ER X
PART NUMBER
Small Cabinet
RGV/RAV/RHV 036-072
RGW/RAW/RHW 037-061
RGH/RAH/RHH 036-060
RGX/RAX/RHX 036-060
RGS/RAS/RHS 036-072
CRECOMZR077A00
Large Cabinet
RGV/RAV 090-150
RHV 090-120
RGW/RAW 072-120
RHW 072-102
RGH/RAH 072-120
RHH 072-102
RGS/RAS 090-150
RHS 090-120
CRECOMZR079A00
Extra Large Cabinet
RGV/RAV 180
RHV 150
RGW/RAW 150
RHW 120
RGH/RAH 150
RHH 120
RGS/RAS 180
RHS 150
CRECOMZR081A00
Table 4 — Package Contents
PACKAGE NO. QTY CONTENTS
CRECOMZR077A00
1
EconoMi$er Horizontal Damper
Assembly with Actuator and
HH79ZZ007 OA Sensor
1HW63AW002 (Honeywell: W7220)
Controller with Attached Harnessa
NOTE(S):
a. Shipped in hardware kit for field installation.
1HH77ZZ007 Mixed Air Temp Sensor
(ring terminal)a
1 48TMHSRSE--A20 4-Wire Harnessa
1 Hood Assembly
1 Aluminum Filter
1 Front Blank Off Panel
1 Filter Access Door
1 Hardware Baga
CRECOMZR079A00
1
EconoMi$er Horizontal Damper
Assembly with Actuator and
HH79ZZ007 OA Sensor
1HW63AW002 (Honeywell: W7220)
Controller with Attached Harnessa
1HH77ZZ007 Mixed Air Temp Sensor
(ring terminal)a
1 48TMHSRSE--A20 4-Wire Harnessa
1 Hood Assembly
1 Aluminum Filter
1 Front Blank Off Panel
1 Horizontal Blank Off Panel
1 Filter Access Door
1 Hardware Baga
CRECOMZR081A00
1
EconoMi$er Horizontal Damper
Assembly with Actuator and
HH79ZZ007 OA Sensor
1HW63AW002 (Honeywell: W7220)
Controller with Attached Harnessa
1HH77ZZ007 Mixed Air Temp Sensor
(ring terminal)a
1 48TMHSRSE--A20 4-Wire Harnessa
1 Hood Assembly
1 Aluminum Filter
1 Front Blank Off Panel
1 Horizontal Blank Off Panel
1 Filter Access Door
1 Hardware Baga

4
ACCESSORIES LIST
The EconoMi$er®X system has several field-installed accessories
available to optimize performance. See Table 6 for authorized
parts and power exhaust descriptions.
Table 5 — EconoMi$er X Sensor Usage
APPLICATION
ECONOMI$ER X WITH
OUTDOOR AIR DRY BULB SENSOR
Accessories Required
Outdoor Air 
Dry Bulb
The HH79ZZ007 outdoor air dry bulb sensor is
factory installed on economizer.
Mixed Air
Sensor
HH79ZZ007 provided with economizer and field
installed in blower compartment.
Single Enthalpy HH57AC081/1185124
Differential Dry
Bulb or Enthalpy
CRDIFRASN01A00a(When available,
or MicroMetl 9901-2022-DIFF JC2)
NOTE(S):
a. Includes HH57AC081/1185124 sensor and wiring harness.
CO2for DCV 
Control Using a
Wall-Mounted 
CO2Sensor
33ZCSENCO2 or CGCDXSEN004A00
CO2for DCV 
Control Using a 
Duct-Mounted 
CO2Sensor
33ZCSENCO2 or
CGCDXSEN004A00b
and
33ZCSENCO2 or
CGCDXASP00100c
b. Accessory CO2sensors.
c. Accessory aspirator boxes required for duct-mounted applications.
or CRCBDIOX005A00d
d. CRCBDIOX005A00 is an accessory that contains both 33ZCSENCO2 and
33ZCASPCO2 accessories.
Table 6 — EconoMi$er X Field-Installed Accessories
DESCRIPTION PART NUMBER
Small & Large Cabinet Power Exhaust
208/230-v 1 Ph CRPWREXH028A01
Small & Large Cabinet Power Exhaust
460-v 3 Ph CRPWREXH029A01
Extra Large Cabinet Power Exhaust
208/230-v 1 Ph CRPWREXH082A01
Extra Large Cabinet Power Exhaust
460-v 3 Ph CRPWREXH083A01
Enthalpy Sensor (OA) HH57AC081/1185124
Differential (Return) Sensor CRDIFRASN01A00a
NOTE(S):
a. When available, or MicroMetl 9901-2022-DIFF JC2.
CO2Sensor and Aspirator Box CRCBDIOX005A00
Return Air CO2Sensor (4 to 20 mA) CRCBDIOX002A00
CO2Room Sensor (4 to 20 mA) 33ZCSENCO2 or
CGCDXSEN004A00
Aspirator Box for Duct Mount
CO2Sensor (4 to 20 mA)
33ZCASPCO2 or
CGCDXASP001A00
Hinged Filter Door Kit for Small Cabinet CRHNGPNL001A00
Hinged Filter Door Kit for Large Cabinet CRHNGPNL002A00
Hinged Filter Door Kit for Extra Large
Cabinet CRHNGPNL003A00

5
INSTALLATION
For economizer component locations, see Fig. 1. For typical ac-
cess panel locations, see Fig. 2.
1. Turn off unit power supply(s) and install lockout tag.
2. Remove the existing unit filter access panel. Raise the panel
and swing the bottom outward. The panel is now disengaged
from the track and can be removed and discarded. See Fig. 2.
3. Remove the indoor coil access panel and discard. (See
Fig. 2.) Remove the horizontal cover panel, see Fig. 2. Rein-
stall panel over return opening in bottom of unit.
4. The EconoMi$er X hood assembly is shipped assembled.
Aluminum filter must be installed on some models. (See
Fig. 3.)
5. Set the EconoMi$er X assembly upright. (See Fig. 4.)
6. Insert the EconoMi$er X assembly into the rooftop unit, posi-
tioning the EconoMi$er X to the far left side of the opening.
(See Fig. 5.)
7. Slide the EconoMi$er X assembly all the way back into the
unit until it locks into the horizontal opening of the HVAC
(heating, ventilation and air conditioning) unit.
8. Secure the EconoMi$er X mounting flanges to the HVAC
unit with the screws provided. (See Fig. 6.)
9. Install a screw through the pre-punched hole in the
EconoMi$er X assembly into the flange on the horizontal
duct opening. (See Fig. 5 and 7.)
10. Remove the red tape securing the relief dampers for shipping
purposes.
11. On some units, the EconoMi$er X assembly and hood does
not reach to the top of the unit. In this case a front blank-off
panel must be installed. Install provided front blank-off
panel above hood. Screw in place. (See Fig. 8 and 9.)
NOTE: The front blank-off panel must be installed before the
hood because the top of the hood fits into a channel in the bottom
of the panel.
12. Install the EconoMi$er X hood over the EconoMi$er X. Use
screws provided. (See Fig. 9 and 10.) Insert screw through
right side flange of hood into EconoMi$er X flange.
13. On some units, the return damper does not reach to the top of
the horizontal return opening in the unit. In this case, a hori-
zontal blank-off must be installed. Install the horizontal
blank-off at the top of the horizontal return opening. (See
Fig. 8.) Screw in place through pre-punched holes.
14. Install access door next to hood. Screw bottom of door to
HVAC unit. (See Fig. 9 and 10.) For the economizer for the
extra large cabinet, install plastic inserts on right-hand verti-
cal post and install long gasketed screws along the vertical
edge. Use standard serrated screws along the bottom of the
panel for all units.
15. See economizer performance charts in Fig. 11 and 12. See
base unit installation manual to make adjustments to meet
building ventilation requirements.
16. If the EconoMi$er X will be operating with an enthalpy out-
side air sensor, remove the factory-installed HH79ZZ007 dry
bulb sensor from the front face of the economizer (see Fig. 1),
and install the accessory enthalpy sensor HH57AC081/
1185124 in the same location. Holes are pre-punched. Con-
nect the (2) wire gray harness with plug from the EconoMi$er
X to the enthalpy sensor. See wiring diagram Fig. 25 and 30.
Refer to the “Installing Optional HH57AC081/1185124 Out-
side Air Enthalpy Sensor” section for more details on
enthalpy settings.
17. Remove and save the 12-pin jumper plug from the unit econ-
omizer harness – located in the upper left corner of the unit.
Insert the EconoMi$er X plug into the unit wiring harness.
(See Fig. 13.)
NOTE: The 12-pin jumper plug should be saved for future use, in
the event that the EconoMi$er X assembly is ever removed. The
jumper plug is not needed as long as the EconoMi$er X assembly
is installed.
18. Remove the indoor blower access panel and the panel(s) cov-
ering the unit control box. (See Fig. 14.)
19. In the hardware kit provided with the EconoMi$er X assem-
bly is the HH63AW002 controller (Honeywell W7220). The
controller is attached to a mounting bracket and the
EconoMi$er X harness is attached to the controller. Mount
the controller assembly on the left side of the unit control box.
Screw bracket to the control box through pre-punched holes
in control box. (See Fig. 15.)
20. Unplug the 10-pin female ECON plug currently connected to
the Central Terminal Board (CTB). (See Fig. 16.)
21. Connect the 10-pin female ECON plug removed from the
CTB to the 10-pin male plug from the controller harness. (See
Fig. 17 and 25.)
22. Connect the 10-pin female plug from the controller harness to
ECON on the CTB. (See Fig. 18 and 25.)
23. Connect the White wire from the controller harness to the
W1 terminal on the CTB. (See Fig. 18 and 25.)
24. Connect the red and brown wires from the controller harness
to the CTB. See Fig. 19 and 25. The red wire connects to “R”
on the CTB, and the brown wire connects to “C.”
25. Locate the green wire with yellow stripe from the controller
harness and screw it to the control box (ground). (See
Fig. 20.)
26. Locate the 48TMHSRSE--A20 harness (with 4-pin female
plug) provided in the hardware kit with the EconoMi$er X
assembly. Connect the 48TMHSRSE--A20 harness to the
4-wire harness with a male plug from the controller harness.
(See Fig. 21 and 25.)
27. Route the 4-wire 48TMHSRSE--A20 harness through the
divider between the control box and the indoor blower
section. (See Fig. 22.)
28. Screw the HH79ZZ007 mixed air (MAT) sensor to the left
side edge of indoor blower through pre-punched hole, see
Fig. 23. Confirm that the screw does not interfere with blower
rotation. Connect the (2) spade terminals on the HH79ZZ007
sensor to the orange and brown wires from the 4-wire 48TM-
HSRSE--A20 harness. (See Fig. 23 and 25.)
29. Connect the pink and violet wires from the 4-wire
48TMHSRSE--A20 harness to the pink and violet terminals
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 at-
tempting to install accessory.

6
in the wire bundle in the indoor blower section. (See Fig. 24
and 25.)
30. If using differential return sensor or DCV sensor, install it
now. See installation details later in the instructions and the
wiring diagram for further information.
Fig. 1 — EconoMi$er X Component Locations
Fig. 2 — Typical Outdoor Air Section Access Panel
Locations
Fig. 3 — EconoMi$er X Hood Detail
Fig. 4 — EconoMi$er X Positioned for Installation in
Unit
Outside Air
Temperature Sensor
Red Shipping Tape
Outside Air
Damper
Wiring Harness PlugBarometric Relief
Damper
Compressor
Access Panel
Outdoor-Air Opening and
Indoor Coil Access Panel
Filter Access Panel
Horizontal
Cover Panel
ECONOMIZER P/N A B SHIP WT.
CRECOMZR077A00 25.1" 29.19" 95 lb
CRECOMZR079A00 25.1" 37.25" 150 lb
CRECOMZR081A00 24.81" 53.36" 245 lb
B
A
HOOD
ALUMINUM
FILTER
FILTER
CLIP
CLEANABLE
ALUMINUM
FILTER
OUTSIDE AIR
RELIEF AIR

7
Fig. 5 — Top View of EconoMi$er X Installation
Fig. 6 — EconoMi$er X Installed in Unit
Fig. 7 — Top View of EconoMi$er X Installed in Unit
Fig. 8 — Horizontal Return Opening Blank-Off Panel
Fig. 9 — Front Blank-Off Panel Installation Panel
Fig. 10 — EconoMi$er X Hood Installation
Barometric
Relief Dampers
Outside Air
Temperature
Sensor
HVAC
Filters
Outdoor
Air Damper
Mounting
Screws
FILTERS
ECONOMI$ER X
PLUG ECONOMI$ER X
ACTUATOR
SCREW
WIRING
HARNESS
ECONOMI$ER X
HOOD
HORIZONTAL
BLANK-OFF
FRONT BLANK-OFF PANEL
ECONOMI$ER X
HOOD
ACCESS DOOR
TO FILTERS
FRONT BLANK-OFF PANEL
ECONOMI$ER X
HOOD
ACCESS DOOR
TO FILTERS
SCREWS

8
Fig. 11 — Barometric Flow Capacity
Fig. 12 — Return Air Pressure Drop
Fig. 13 — Connect EconoMi$er X Harness to Unit
PL6 Economizer Harness
Fig. 14 — Typical Indoor Fan Motor Access Panel
Locations
Fig. 15 — Mount Controller Assembly in
Unit Control Box
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
0
1000
2000
3000
4000
5000
6000
00.10.20.30.4
RETURN AIR FLOW (CFM)
RETURN DUCT STATIC PRESSURE DROP (in. wg)
Small Cabinet
Large Cabinet
ExtraLarge Cabinet
Rooftop Unit’s
12-Pin Male Plug
EconomizerONE
12-Pin Female Plug
INDOOR FAN MOTOR
ACCESS PANEL
HEATING ACCESS
PANEL
THERMOSTAT
CONNECTION
ACCESS PANEL
CENTER POST
NOTE: Some control box configurations may differ.

9
Fig. 16 — Unplug ECON plug from
Central Terminal Board (CTB)
Fig. 17 — Connect 10-pin Plugs Together
Fig. 18 — Connect 10-pin Plug to
Central Terminal Board (CTB)
Fig. 19 — Connect Red and Brown Wires to
Central Terminal Board (CTB)
Unplug
ECON Plug
Central
Terminal
Board
White
Wire
10-Pin
Female
Plug from
Controller
Central
Terminal
Board

10
Fig. 20 — Connect Ground Wire From Controller
Fig. 21 — Connect 48TMHSRSE--A20 Harness to
Harness from Controller
Fig. 22 — Route 48TMHSRSE--A20 Harness to Indoor
Blower Section
Fig. 23 — Mount and Connect Mixed Air Sensor
4-pin Male Plug
From Controller 48TMHSRSE--A20
Harness
Control
Box
Controller
Harness
Indoor
Blower
Section
NOTE: Some control box configurations may differ.
Connect (2)
green wires from
HH79ZZ007/1185188
sensor to the brown
and orange wires from
the 48TMHSRSE--A20
Indoor
Blower
HH79ZZ007/
1185188
MAT Sensor
(Ring terminal)

11
Fig. 24 — Connect Pink and Violet Wires in Indoor
Blower Section
Fig. 25 — Typical EconoMi$er X Wiring Diagram for 1 or 2 Speed Units
(Not for 48/50LC 07-12 Units)
Pink and Violet
Wires from
48TMHSRSE--A20
Harness
Indoor
Blower
Mixed Air Sensor
Field Mount on
Indoor Blower
1
HH79AH001
HONEYWELL C7250
Dry Bulb
Outside Air
Sensor
12-Pin Female
Plug from Economizer
Economizer
Harness
In Unit
50HE403859
Harness
GRN
GRN
WHT
BLK
GRN
BLU
BLK
GRA
GRA
GRA
GRA
PNK PNK
BLU
BLK
PNK
GRA
GRA
GRA
RED
PNK
ORG
BRN
YEL
VIO VIO VIO
ORG ORG
BRN BRN
GRN
GRN
6
7
2
3
10
11
5
1
12
9
4
8
RED
ORG
1
2
3
4
RED
Economizer
Actuator
1
2
3
4
HH57AC081
1
2
1
Enthalpy Outside
Air Sensor
To Optional
Power Exhaust
PL6
Plug 12-Pin Male
Plug in Unit
48TMHSRSE--A20
Harness with
4-Pin Female Plug 4-Pin Male
Plug
10-Pin Male
Plug
PNK
BLU
BLK
GRA
GRA
RED “R” ON CTB
ORG
BRN
YEL
“C” ON CTB
BLU
BLK
GRN / YEL
WHT
BLU
GRA
ORG
YEL
BLK
BRN
RED
VIO
1
1
2
2
3
3
4
10
6
4
5
9
1
3
8
2
7
1
2
3
4
5
6
7
8
9
10
4
9
3
8
10
2
6
7
5
1
4
10-Pin Female
Plug Disconnected
from CTB CO2
(Optional)
Ground
“W1” on CTB
W7220 Controller,
Field Mounted in
Unit Control Box
MAT
MAT
OAT
OAT
ACT 24V
ACT COM
S-BUS
S-BUS
EXH1
IAQ COM
ACT 2-10
AUX1 OUT
IAQ 2-10
E-GRD
AUX2 IN
Y1 IN
Y1 OUT
Y2 OUT
Y2 IN
OCC
C
R
10-Pin Female
Plug Connects to
ECON on
Central Terminal
Board
BRN
YEL
Either the OAT or the Enthalpy
Sensor can be used but not both.
Remove OAT if Enthalpy’s used.
Refer to Figures 35 for Remote Fault
Detection and Diagnostic Monitoring.
LEGEND
3
Refer to Figure 33 for wiring optional
Differential Return Air Sensor kit.
ECONOMIZER RETURN CHAMBER INDOOR BLOWER SECTION UNIT CONTROL BOX COMPARTMENT
DA
RA
OA
123
S-Bus
Temp & Humidity
HH57AC081
S-Bus
CTB: Central Terminal Board
MAT: Mixed Air Temperature Sensor
OAT: Outside Air Temperature Sensor
HH79AH001
HONEYWELL C7250

12
INSTRUCTIONS FOR 48/50LC
07-12 UNITS ONLY
1. Follow steps 1 through 19 in the Installation section.
2. The 48/50LC 07-12 units require different wiring than is
factory-attached to the W7220 controller. Disconnect the
complete wiring harness factory-attached to the W7220 con-
troller (see Fig. 26). This harness can be discarded.
NOTE: The 4-wire 48TMHSRSE--A20 harness provided with the
economizer will also NOT be used on the 48/50LC 07-12 units,
see Fig. 27.
3. The 48/50LC 07-12 units that do not have a factory-installed
economizer will have a new W7220 controller wiring harness
shipped in the control box section of the HVAC unit. This
harness, Carrier part number 48LCHSRADH-A00, is shown
in Fig. 28 and 29.
4. The connectors on the right side of Fig. 29 on the
48LCHSRADH-A00 harness attach to the W7220 control-
ler installed in the unit control box. (See Fig. 29 and 30.)
48LCHSRADH-A00 harness connectors are labeled to eas-
ily identify the plug-in location on the controller.
5. Locate the Compressor Staging Control (CSC) board in the
HVAC unit. When a field-installed economizer is used, the J5
jumper on the CSC must be removed. Remove the J5 jumper.
(See Fig. 30.)
6. The connectors on the left side of Fig. 29 on the
48LCHSRADH-A00 harness attach to the unit’s CSC board.
Connect J3 and J5 plugs to the CSC board. (See Fig. 30.)
7. Screw the green wire with yellow stripe in the
48LCHSRADH-A00 harness to the control box (ground).
(See Fig. 20 and 30.)
8. Mount the provided HH79ZZ007 mixed air temperature
(MAT) sensor to the indoor blower. Confirm that the screws
do not interfere with blower rotation (refer to Fig. 23). Con-
nect the (2) spade terminals on the HH79ZZ007 to orange
and brown wires in the indoor blower section wire bundle.
9. If using a differential return sensor or DCV sensor, install it
now. See installation details later in these instructions and the
wiring diagram for further information.
Fig. 26 — Remove Complete Harness
Factory-Attached to W7220 Controller
Fig. 27 — 48TMHSRSE--A20 Not Used on
48/50LC 07-12 Units
Fig. 28 — Photo of 48LCHSRADH-A00 W7220
Controller Harness Shipped With
48/50LC 07-12 Units
IMPORTANT: This section is for economizer installation in-
structions on 48/50LC 07-12 units only.

13
Fig. 29 — 48LCHSRADH-A00 W7220 Controller Harness Shipped With 48/50LC 07-12 Units

14
NOTE: Harness attached to the W7220 controller from the Carrier factory is removed and not used with 48/50LC 07-12 units.
Fig. 30 — Typical EconoMi$er X Wiring Diagram For 48/50LC 07-12 Units

15
Installing Optional HH57AC081/1185124 Single
Outside Air Enthalpy Sensor
When using the HH57AC081/1185124 (Honeywell C7400S) en-
thalpy sensor for outside air changeover (see Fig. 31), the existing
HH79ZZ007 dry bulb sensor must be removed. The enthalpy sen-
sor will be mounted in the same location as the dry bulb sensor
(refer to Fig. 1). When the enthalpy sensor’s OA temperature, en-
thalpy and dew point are below the respective set points, the out-
side air can be used for free-cooling. When any of these is above
the set point, free-cooling will not be available. Figure 32 shows
the enthalpy boundaries in the W7220 controller. There are (5) en-
thalpy boundaries (set points ES1 through ES5), which are defined
by dry bulb temperature, enthalpy, and dew point. ES3 is the de-
fault setting. Table 7 shows the High Limit Curves for each
setting.
NOTE: To use the HH57AC081/1185124 sensor for outside air
sensor, the DIP switches on the sensor must be set to OFF-OFF-
OFF. See Table 8.
The (2) gray wires with a plug from the EconoMi$er X harness in
the return chamber plug directly into the HH57AC081/1185124
enthalpy sensor. Refer to Fig. 25 and 30 for wiring. Fig. 31 — HH57AC081/1185124 Sensor, Dimensions
and DIP Switch Location
Fig. 32 — Enthalpy Curve Boundaries
4-1/4 (108)
51/64 (21)
2-3/4 (70)
2-1/64 (55)
NOTE: Dimensions are in. (mm).
Economizing
Available
Not Available
Enthalpy
RA Hum (%RH)
RA Temp
Temperature
Absolute Humidity
ES5ES4ES3 ES2ES1HL
P1
(T,RH)
P2 (T,RH)
Single Enthalpy
Dual Enthalpy
High Limit
Table 7 — Single Enthalpy and Dual Enthalpy High Limit Curves
ENTHAPLY
CURVE
TEMP DRY
BULB (°F)
TEMP DEW
POINT (°F)
ENTHALPY
(btu/lb/da)
POINT P1 POINT P2
Temp (°F) Humidity %RH Temp (°F) 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

16
Installing Differential Return Air Sensor
The CRDIFRASN01A00 differential return air sensor kit must be
field mounted in the system’s return duct work. The kit includes a
wiring harness that connects the EconoMi$er X harness in the re-
turn chamber of the unit to the provided HH57AC081/1185124
sensor. Wire as shown in Fig. 33.
In addition to using the HH57AC081/1185124 (Honeywell
C7400S) sensor (refer to Fig. 31) for a single enthalpy sensor, it
can also be used as a differential return enthalpy or dry bulb sen-
sor. Figure 32 shows the dual enthalpy boundaries in the W7220
controller. With dual 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. Refer
to Table 7 for the High Limit Curves for each setting.
NOTE: To use the HH57AC081/1185124 sensor for differential
return air, the DIP switches on the sensor must be set to
ON-OFF-OFF. Refer to Table 8.
When using the CRDIFRASN01A00 differential return enthalpy
or dry bulb temperature option, see Table 9 for California Title 24
setting requirements by region.
Fig. 33 — Wiring Differential Return Air Sensor
Table 8 — HH57AC081/1185124 Sensor DIP Switch
Use
DIP SWITCH POSITIONS FOR
SWITCHES 1, 2, AND 3
123
DA OFF ON OFF
RA ON OFF OFF
OA OFF OFF OFF
LEGEND
DA — Discharge Air or Supply Sensor
RA — Return Air
OA — Outside Air
BLU
BLK
GRA GRA GRA
GRA GRA
GRA GRA
PNK
VIO 6
7
2
3
10
11
5
1
12
9
4
8
RED
ORG
PL6
PLUG
BRN
YEL
12-Pin Female Plug
From Economizer
Wiring
Harness*
12-Pin Male
Plug In Unit
*HH57AC081
Differential return
sensor field mounted
in return duct.
*Provided in CRDIFRAS001A00 Kit.

17
California’s Title 24 High Temperature Limit
Settings
California’s Title 24 code requires a high temperature limit setting
for all dry bulb outside air economizer change over. The tempera-
tures vary by region within California. See Table 9 for high limit
settings.
Demand Controlled Ventilation (DCV)
Refer to EconoMi$er X wiring diagram (refer to Fig. 25 and 30)
and DCV instructions if demand controlled ventilation (CO2sen-
sor) is used. CO2sensor will wire into the blue and black connec-
tions at the controller as shown in Fig. 25, 30, and 34. If a field-in-
stalled CO2sensor is connected to the EconoMi$er X controller, a
demand controlled ventilation strategy will operate automatically.
As the CO2level in the space increases above the set point (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 de-
mand condition from the DCV mode or from the free cooling
mode.
Fig. 34 — CO2Wiring Connections to Controller
Remote (Downstairs) Monitoring of Controller’s 
Fault Detection and Diagnostics
Many codes including IECC, Title 24, and ASHRAE 90.1 require
that the economizer’s faults be accessible by operating or service
personal, or annunciated locally on zone thermostat. To setup re-
mote monitoring on the controller, under SYSTEM SETUP,
AUX1-OUT must be set to SYS.
The latest versions of Honeywell’s TH8321WF or TH8321R
thermostats are options for meeting this requirement. Figure 35
shows an example of the thermostat wiring to the controller.
Follow instructions provided with Honeywell thermostat.
Another option that is acceptable to some codes is an annunciator
light visible by service personnel. See Fig. 36 for typical wiring to
the controller. Refer to codes for proper labeling of light.
Fig. 35 — Thermostat Wired for Remote FDD
Table 9 — California Title 24 Regional High Limit Dry
Bulb Temperature Settings
(TABLE 140.4-B AIR ECONOMIZER HIGH LIMIT SHUT OFF
CONTROL REQUIREMENTS)
DEVICE TYPEa
NOTE(S):
a. Only the high limit control devices listed are allowed to be used and at the set
points listed. Others such as Dew Point, Fixed Enthalpy, Electronic Enthalpy,
and Differential Enthalpy Controls may not be used in any climate zone for
compliance with Section 140.4(e)1 unless approval for use is provided by the
Energy Commission Executive Director.
CLIMATE
ZONES
REQUIRED HIGH LIMIT
(Economizer Off When):
Description
Fixed Dry Bulb
1, 3, 5, 11-16 OAT exceeds 75°F
2, 4, 10 OAT exceeds 73°F
6, 8, 9 OAT exceeds 71°F
7 OAT exceeds 69°F
Differential Dry
Bulb
1, 3, 5, 11-16 OAT exceeds
RA temperature
2, 4, 10 OAT exceeds return air
temperature minus 2°F
6, 8, 9 OAT exceeds return air
temperature minus 4°F
7OAT exceeds return air
temperature minus 6°F
Fixed Enthalpyb
+ Fixed Dry Bulb
b. At altitudes substantially different than sea level, the Fixed Enthalpy limit value
shall be set to the enthalpy value at 75°F and 50% relative humidity. As an ex-
ample, at approximately 6,000 foot elevation, the fixed enthalpy limit is approx-
imately 30.7 Btu/lb.
All
OAT exceeds 28 Btu/lb of dry airb
or
OAT exceeds 75°F
Black Wire
IAQ 2-10 VDC
Blue Wire
IAQ COM
CR
AUX2-1
OCC
E-GND
EXH1
AUX1-0
Y2-I
Y2-O
Y1-I
Y1-O
C
R
W7220
ECONOMIZER
U1
U1
R
Rc
C
A-L/A
FURNACE, AIR HANDLER,
OR RTU
TH8321R OR
TH8321WF
SUB-BASE

18
Fig. 36 — Annunciator Light Wired for Remote FDD
MAT
Controller Setting: Under the “System Setup” menu, set AUX1-OUT to
“SYS” which will close controller relay on fault detection.
*Examples of annunciator lights
would include these Grainger lights:
- Item #20C841
- Item #20C846
AUX2-I
OCC
E-GND
EXH1
AUX1-O
Y21
Y2O
Y1I
Y1O
=CR
IAQ COM
IAQ (2-10V)
IAQ 24V
ACT (2-10V)
ACT COM
ACT 24V
MAT
OAT
OAT
TO “C” TERMINAL
TO “AUX1-O” TERMINAL
Annunciator Light*
W7220 Economizer Controller Module

19
GENERAL W7220 CONTROLLER
AND SENSOR INFORMATION
W7220 Economizer
The economizer controller used on electromechanical units is a
Honeywell W7220, which is located in the RTU base unit’s Con-
trol Box. See the base unit’s Installation Instructions for the loca-
tion of the Control Box access panel.
The W7220 controller provides the following:
• 2-line LCD interface screen for setup, configuration, and
troubleshooting.
• On-board fault detection and diagnostics
• Sensor failure loss of communications identification
• 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 key-
pad on the front of the economizer controller.
Keypad
The four navigation buttons (see Fig. 37) are used to scroll
through the menus and menu items, to select menu items, and to
change parameter and configuration settings.
Fig. 37 — W7220 Controller
Using the Keypad with Menus
To use the keypad when working with menus:
•Pressthe▲(Up arrow) button to move to the previous
menu.
•Pressthe▼(Down arrow) button to move to the next
menu.
• Press the (Enter) button to display the first 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 set points, system and ad-
vanced settings, checkout tests, and alarms:
1. Navigate to the desired menu.
2. Press the (Enter) button to display the first 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 cur-
rently displayed item.
5. Press the ▲button to increase the displayed parameter value.
6. Press the ▼button to decrease 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. The message “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 11 illustrates the complete hierarchy of menus and parame-
ters for the EconoMi$er X system.
The Menus in display order are:
• STATUS
•SETPOINTS
• SYSTEM SETUP
• ADVANCED SETUP
• CHECKOUT
•ALARMS
Programming the W2770 Controller
The next several pages detail the different status displays, set
points, setup, and alarms available on the controller. The list below
and Table 10 summarize the inputs required for a standard applica-
tion with a single outside air sensor.
NOTE: Instead of setting the SETPOINTS, you can use the de-
faults already set in the controller – see default settings below. See
Table 10 for summarized standard settings or, for more detail, see
Table 11 — Menu Structure.
IMPORTANT: The default setting on the W7220 controller
is for a “Fan Type” with 2 speed, which is correct for 2 or
3 speed units (48/50LC 07-12). For a 1 (single) speed unit,
the setting under SYSTEM SETUP > FAN TYPE must be
changed to 1 speed.
IMPORTANT: Table 11 illustrates the complete hierarchy.
Menu parameters may be different depending on configura-
tion. For example, none of the DCV parameters appear for a
system that does not have a DCV (CO2) sensor.

20
SETPOINTS
• MAT SET: this sets the mixed air temperature (MAT) set-
ting. The controller has a default of 53°F, but the range is
anywhere from 38°F to 70°F.
• LOW T LOCK: This setting locks out the compressor (or
mechanical cooling) at a given temperature. The default is
32°F, but the controller’s range is from –45°F to 80°F.
• DRYBULB SET: if you have an economizer with a dry
bulb outside air sensor, you will see and set the
DRY-BULB SET. The default setting is 63°F but the con-
troller’s range is 48°F to 80°F.
• ENTH CURVE: if you have a single enthalpy outside air
sensor instead of a dry bulb, you will see and set the ENTH
CURVE setting. There are 5 setting options: ES1 through
ES5. Refer to Table 7 for the limits for each of these set-
tings. ES3 is the default setting.
• MIN POS: The minimum position allows for ventilation
even when not in the free-cooling mode. If you have a sin-
gle speed unit there will be only one minimum position
setting. The default is 4.4 volts, but the range is 2 to
10 vdc.
• MIN POS H and MIN POS L: If your unit is 2 speed, there
will be 2 minimum position settings that show up on the
menu. The first is MIN POS H (for high speed), which has
a default of 4.4-v. The second is MIN POS L (for low
speed), which has a default of 6.0-v. Note that MIN POS H
and MIN POS L are only displayed if under SYSTEM
SETUP, AUX2 IN is set to “W1”, and FAN TYPE is set to
2 speed.
SYSTEM SETUP
• INSTALL: Allows you to set the current date. Use the key-
pad buttons to scroll to the correct date.
• EQUIPMENT: Always set to CONV even if the unit is a
heat pump.
• AUX2 IN: Always set to W.
• FAN TYPE: Set for either single speed or 2 speed. The de-
fault setting is 2 speed.
• AUX OUT: If remote Fault Detection and Diagnostic
(FDD) monitoring is required, select SYS.
• OCC: occupancy, always set to INPUT
Table 10 — Standard W7220 Controller Configurationa
NOTE(S):
a. More sophisticated controller setups, including for DCV or power exhaust, are available. See Table 11 for options.
CONTROLLER MENU ITEM FOR SINGLE-SPEED UNIT FOR 2-SPEED UNITb
b. For 2 speed unit, under SYSTEM SETUP: EQUIPMENT= CONV, AUX2 I = W, and FAN TYPE = 2 SPEED
NOTE
Default Set to: Default Set To:
SET
POINTS
MAT SET 53°F 38°F to 70°F 53°F 38°F to 70°F
LOW T LOCK 32°F –45°F to 80°F 32°F –45°F to 80°F
DRYBLB SET 63°F 48°F to 80°F 63°F 48°F to 80°F Only displayed if using single DB OA sensor
ENTH CURVE ES3 ES1 to ES5 ES3 ES1 to ES5 Only displayed if using a single enthalpy OA sensor
MIN POS 4.4 vdc 2 to 10 vdc — — Only displayed if set up for single speed unit
MIN POS H — — 4.4 vdc 2 to 10 vdc Only displayed if set up for 2 speed unit
MIN POS L — — 6.0 vdc 2 to 10 vdc Only displayed if set up for 2 speed unit
SYSTEM
SETUP
INSTALL 1/1/2010 Current date 1/1/2010 Current date
EQUIPMENT CONV CONV CONV CONV Always set to CONV, even on HP units
AUX2 IN W W W W Always set to W
FAN TYPEc,d
c. Fan speed options are:
1) 1 Speed
2) 2 Speed
3) 2 Speed: 1 Heat, 1 Cool.
4) 3 Speed: 1 Heat, 2 Cool.
d. Do not use 3 speed setting for LC units.
2 Speed 1 Speed 2 Speed 2 Speed See table footnote c
AUX1 OUT NONE SYS NONE SYS Set to SYS for remote FDD monitoring
OCC INPUT INPUT INPUT INPUT Always set to INPUT