Carrier CRECOMZR076A00 User manual

Manufacturer reserves the right to discontinue, or change at any time, specifications or designs without notice and without incurring obligations.
Catalog No. 04-53480357-01 Printed in U.S.A. Form IIK-CRECOMZR76-04 Pg 1 6-22 Replaces: IIK-CRECOMZR76-03
Installation Instructions
Part No: CRECOMZR076A00, CRECOMZR078A00 and CRECOMZR080A00
CONTENTS
Page
SAFETY CONSIDERATIONS . . . . . . . . . . . . . . . . . . . 1
GENERAL . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2
ACCESSORIES AND COMPLIANCE . . . . . . . . . . . . . 3
Accessories List . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3
Compliance . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4
INSTALLATION . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4
Installation Instructions for 48/50LC 07-12 Units
ONLY . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11
Installing Optional HH57AC081 Single Outside Air
Enthalpy Sensor . . . . . . . . . . . . . . . . . . . . . . . . . . 12
Installation Instructions for Units with Vane Axial
Fans Only . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14
• UNIT ECONOMI$ER X HARNESS ADAPTER KIT
SUPPLEMENT
• HARNESS ADAPTER KIT INSTRUCTIONS FOR
48TC003198 AND 48TC003199
Installing Differential Return Air Sensor . . . . . . . . . 16
California’s Title 24 High Temperature Limit
Settings . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 16
Demand Controlled Ventilation . . . . . . . . . . . . . . . . 16
Remote (Downstairs) Monitoring of Controller’s Fault
Detection and Diagnostics . . . . . . . . . . . . . . . . . . 17
GENERAL W7220 CONTROLLER AND SENSOR
INFORMATION . . . . . . . . . . . . . . . . . . . . . . . . . . . . 18
W7220 Economizer . . . . . . . . . . . . . . . . . . . . . . . . . . 18
User Interface . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 18
Keypad . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 18
Using the Keypad with Menus . . . . . . . . . . . . . . . . . 18
Using the Keypad with Settings and Parameters . . 18
Programming the W7220 Controller . . . . . . . . . . . . 19
• SETPOINTS
• SYSTEM SETUP
Menu Structure . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 19
Checkout Tests . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 24
W7220 Economizer Module Wiring . . . . . . . . . . . . . 24
• TIME-OUT AND SCREEN SAVER
START-UP AND OPERATION . . . . . . . . . . . . . . . . . . 25
Cooling with EconoMi$er X . . . . . . . . . . . . . . . . . . . 25
Heating with EconoMi$er X . . . . . . . . . . . . . . . . . . . 25
TROUBLESHOOTING . . . . . . . . . . . . . . . . . . . . . . . . 26
Power Loss (Outage or Brownout) . . . . . . . . . . . . . 26
Alarms . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 26
• CLEARING ALARMS
SAFETY CONSIDERATIONS
Installation and servicing of air-conditioning equipment can be
hazardous due to system pressure and electrical components. Only
trained and qualified service personnel should install, repair, or
service air-conditioning equipment.
Untrained personnel can perform basic maintenance functions of
cleaning coils and filters and replacing filters. 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, including ANSI (American National
Standards Institute) Z223.1. Wear safety glasses and work gloves.
Use quenching cloth for unbrazing operations. Have fire
extinguisher available for all brazing operations.
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.
DANGER
ELECTRICAL SHOCK HAZARD
Failure to follow this warning will result in personal injury or
death.
Before performing service or maintenance operations on unit,
turn off main power switch to unit and install lock(s) and
lockout tag(s). Ensure electrical service to rooftop unit agrees
with voltage and amperage listed on the unit rating plate. Unit
may have more than one power switch.
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.
Small Rooftop Products
Select 3 to 15 Tons
Vertical - Low Leak EconoMi$er®X Accessory

2
GENERAL
The EconoMi$er® X system utilizes the latest technology
available for integrating the use of free cooling with mechanical
cooling for packaged rooftop units. The code compliant W7220
control system optimizes energy consumption, zone comfort,
and equipment cycling by operating the compressors when the
outdoor-air temperature is too warm, integrating the compressor
with outdoor air when free cooling is available, and locking out
the compressor when outdoor-air temperature is too cold.
Demand controlled ventilation is supported.
This EconoMi$er X system can be used with 1 or 2 speed indoor
fan motor 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
detection and diagnostics (FDD), an outdoor air temperature
sensor, and mixed air temperature sensor (also called supply air
temperature sensor). Outdoor enthalpy, indoor (return) dry bulb
or enthalpy, and CO2 sensors 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
capabilities. The power exhaust set point is adjustable at the
EconoMi$er X controller.
See Table 1-3 for package usage. See Table 4 for package
contents. See Table 5 for sensor usage.
NOTE: Not all unit sizes may be available at this time.
CAUTION
PERSONAL INJURY HAZARD
Failure to follow this caution can result in personal injury and
damage to the unit.
Cover the duct opening as a precaution so objects cannot fall
into the return duct opening. Be sure to remove the cover when
installation is complete.
IMPORTANT: Read these instructions completely before
attempting to install accessory economizer.
Table 1 — Carrier Usage Chart
CARRIER MODEL NUMBER ECONOMI$ER X
PART NUMBER
Small Cabinet
48/50FC 04-07
CRECOMZR076A00
50FCQ04-07
48/50GC 04-06
50GCQ04-06
48/50HC 04-06
50HCQ 04-06
48/50KC 04-06
50KCQ 04-06
48/50LC 04-06
48/50TC 07
50TCQ 07
Large Cabinet
48/50FC 08-14
CRECOMZR078A00
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
Extra Large Cabinet
48/50FC 16
CRECOMZR080A00
50FCQ 14
48/50GC 14
50GCQ 12
48/50HC 14
50HCQ 12
48/50LC 08-12
48/50TC 16
50TCQ 14
Table 2 — Bryant Usage Chart
BRYANT MODEL NUMBER ECONOMI$ER X
PART NUMBER
Small Cabinet
582K/559K/547K 04-07
CRECOMZR076A00
581K/551K/549K 04-06
581J/551J/549J 04-06
582J/559J/547J 04-06
580J/558J/548J 07
Large Cabinet
582K/559K 08-14
CRECOMZR078A00
547K 08-12
581K/551K 07-12
549K 07-09
581J/551J 07-12
549J 07-09
580J/558J 08-14
548J 08-12
Extra Large Cabinet
582K/559K 16
CRECOMZR080A00
547K 14
581K/551K 14
549K 12
581J/551J 14
549J 12
580J/558J 16
548J 14

3
* Shipped in hardware kit for field installation.
†Wiring Harness is shipped with original unit, not with kit.
HW = Honeywell
* Accessory CO2 sensors.
†Accessory aspirator boxes required for duct-mounted applications.
** CRCBDIOX005A00 is an accessory that contains both 33ZCSENCO2
and 33ZCASPCO2 accessories.
†† Includes HH57AC081 sensor and wiring harness.
ACCESSORIES AND COMPLIANCE
Accessories List
The EconoMi$er X system has several field-installed accessories
available to optimize performance. Refer to Table 6 for authorized
parts and power exhaust descriptions.
* When available, or order MicroMetl PN 9901-2022-DIFF JC2.
Table 3 — ICP Usage Chart
ICP MODEL NUMBER ECONOMI$ER® X
PART NUMBER
Small Cabinet
RGV/RAV/RHV 036-072
CRECOMZR076A00
RGW/RAW/RHW 036-060
RGH/RAH/RHH 036-060
RGS/RAS/RHS 072
RGX/RAX/RHX 036-060
Large Cabinet
RGV/RAV 090-150
CRECOMZR078A00
RHV 090-120
RGW/RAW 072-120
RHW 072-102
RGH/RAH 072-120
RHH 072-102
RAS/RGS 090-150
RHS 090-120
Extra Large Cabinet
RGV/RAV 180
CRECOMZR080A00
RHV 180
RGW/RAW 150
RHW 120
RGH/RAH 150
RHH 120
RAS/RGS 180
RHS 150
Table 4 — Package Contents
ECONOMIZER
PART NUMBER QTY CONTENTS
CRECOMZR076A00,
CRECOMZR078A00
1
EconoMi$er Damper Assembly with
Actuator and HH79AH001 (HW: C7250)
Outside Air Sensor
1HW63AW002 (HW: W7220) Controller
with Attached Harness†
1 HH79ZZ007 Mixed Air Temp Sensor*
1 48TMHSRSE--A20 4-Wire Harness†
1 Hood Assembly with Top and 2 Sides
1 Hood Divider
1 Aluminum Filter
1 Hardware Bag*
CRECOMZR080A00
1
EconoMi$er Damper Assembly with
Actuator and HH79AH001 (HW: C7250)
Outside Air Sensor
1HW63AW002 (HW: W7220) Controller
with Attached Harness†
1 HH79ZZ007 Mixed Air Temp Sensor*
1 48TMHSRSE--A20 4-Wire Harness†
1 Hood Assembly with Top and 2 Sides
1 Hood Divider
1 Hood Filter Divider
2 Aluminum Filter
1 Hardware Bag*
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
Differential
Dry Bulb or
Enthalpy
CRDIFRASN01A00†† (When available, or
MicroMetl part number 9901-2022-DIFF JC2)
CO2 for DCV
Control using
a Wall-Mounted
CO2 Sensor
33ZCSENCO2
or
CGCDXSEN004A00
CO2 for DCV
Control using
a Duct-Mounted
CO2 Sensor
33ZCSENCO2 or
CGCDXSEN004A00*
and
33ZCSENCO2 or
CGCDXASP00100†
or CRCBDIOX005A00**
Table 6 — EconoMi$er X Field-Installed Accessories
DESCRIPTION PART NUMBER
208/230v 1PH Power Exhaust for Small
Cabinet CRPWREXH030A01
460v 3PH Power Exhaust for Small
Cabinet CRPWREXH021A01
208/230v 1PH Power Exhaust for Large
Cabinet CRPWREXH022A01
460v 3PH Power Exhaust for Large
Cabinet CRPWREXH023A01
208/230v 1PH Power Exhaust for Extra
Large Cabinet CRPWREXH080A00
460v 3PH Power Exhaust for Extra
Large Cabinet CRPWREXH081A01
Enthalpy Sensor (OA) HH57AC081
Differential (Return) Sensor CRDIFRASN01A00*
CO2 Sensor and Aspirator Box CRCBDIOX005A00
Return Air CO2 Sensor (4 to 20 mA) CRCBDIOX002A00
CO2 Room Sensor (4 to 20 mA) 33ZCSENCO2 or
CGCDXSEN004A00
Aspirator Box for Duct Mount CO2
Sensor (4 to 20 mA)
33ZCASPCO2 or
CGCDXASP001A00
Economizer Angle Seal Kit for use with
unit's with Hinged Filter Door - for
Small Cabinet
CRPECONV003A00
Economizer Angle Seal Kit for use with
unit's with Hinged Filter Door - for
Large Cabinet
CRPECONV004A00
Economizer Angle Seal Kit for use with
unit's with Hinged Filter Door - for Extra
Large Cabinet
CRPECONV007B00

4
Compliance
Economizers meet California Energy Commission Title 24
mandatory section 120.2.i for Fault Detection and Diagnostic
controls.
Economizers meet ASHRAE 90.1 Fault Detection and Diagnostic
requirements.
Economizers meet IECC Fault Detection and Diagnostic
requirements.
NOTE: IECC requires differential return air sensor, which must be
ordered separately. See Accessory CRDIFRASN01A00.
INSTALLATION
See Fig. 1 for component locations.
NOTE: If installing economizer on 48/50LC 07-12 units, see
special section beginning on page 11. If installing economizer on
48/50FC (582K/559K, RGV/RAV) and 48/50GC (581K/551K,
RGW/RAW) units, see special section beginning on page 14.
1. Turn off 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. (See Fig. 2 and 3.) Set the
filter door aside for re-installation later.
3. Remove the indoor coil access panel and discard. (See
Fig. 2.)
4. Slide the EconoMi$er X assembly into the rooftop unit. (See
Fig. 4.)
NOTE: On small and large cabinets, be sure to engage the rear
EconoMi$er X flange under the tabs on the unit base in the return
air chamber. (See Fig. 5.)
5. Ensure EconoMi$er X assembly is square. Screw the
EconoMi$er X system to the unit along both side flanges and
bottom flange. (See Fig. 4.)
6. Remove the red tape securing the relief dampers for shipping
purposes.
7. If the EconoMi$er X system will be operating with an
enthalpy outside air sensor, remove the factory installed
HH79ZZ007 dry bulb sensor from the front face of the
economizer (see Fig. 1), and install the accessory enthalpy
sensor HH57AC081 in the same location. Connect the (2)
wire gray harness with plug from the EconoMi$er X
assembly to the enthalpy sensor. See Fig. 25 for wiring
diagram. Refer to “Installing Optional HH57AC081 Outside
Air Enthalpy Sensor” section for more details on enthalpy
settings.
Fig. 1 — EconoMi$er X Component Locations
(CRECOMZR076A00 Shown)
Fig. 2 — Typical Access Panel Locations
Fig. 3 — Filter Access View
Fig. 4 — EconoMi$er X Installed on HVAC Unit
(CRECOMZR076A00 Shown
Actuator EconoMi$er X
Wiring Harness
HH79AH001
Outside Air
Temperature
Sensor
Barometer Relief
Dampers
Outside
Air Damper
Compressor
Access Panel
Outdoor-air Opening And
Indoor Coil Access Panel
Filter Access Panel
Filter Access Panel
Indoor Coil Access Panel
Wiring
Harness
EconoMi$er X
HVAC Unit Filters
Insert Screw in
EconoMi$er X
Flanges

5
Fig. 5 — Rear EconoMi$er X Flange Installation
(CRECOMZR076A00 and CRECOMZR078A00)
8. Remove and save the 12-pin jumper plug from the unit
economizer harness – located in the upper left corner of the
unit. Insert the EconoMi$er X plug into the unit wiring
harness. (See Fig. 6.)
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 is
installed.
Fig. 6 — Connect EconoMi$er X Harness to Unit PL6
Economizer Harness
9. Remove the indoor blower access panel and the panel(s)
covering the unit control box. (See Fig. 7.)
Fig. 7 — Typical Indoor Fan Motor Access Panel
Locations
10. In the hardware kit provided with the EconoMi$er X acces-
sory is the HH63AW002 controller (Honeywell W7220). The
controller is attached to a mounting bracket and the
EconoMi$er X harness is attached to the controller. Mount
the controller assembly on the left side of the unit control box.
Screw bracket to the control box through pre-punched holes
in control box. (See Fig. 8.)
11. Unplug the 10-pin female ECON plug currently connected to
the Central Terminal Board (CTB). (See Fig. 9.)
NOTE: Some control box configurations may differ.
Fig. 8 — Mount Controller Assembly in Unit Control
Box
Fig. 9 — Unplug ECON plug from Central Terminal
Board (CTB)
12. Connect the 10-pin female ECON plug removed from the
CTB to the 10-pin male plug from the controller harness. (See
Fig. 10 and 25.)
Unit Filter
Rack
EconoMi$er X
Hold Down Tab
Unit Base EconoMi$er X
EconoMi$er X Rear Flange
Rooftop Unit’s
12-Pin Male Plug
EconoMi$er X
12-Pin Female Plug
Unit Control
Box Panel(s)
Center Post
Indoor Blower
Access Panel

6
Fig. 10 — Connect 10-pin Plugs Together
13. Connect the 10-pin female plug from the controller harness to
ECON on the CTB. (See Fig. 11 and 25.)
Fig. 11 — Connect 10-Pin Plug to
Central Terminal Board
14. Connect the White wire from the controller harness to the W1
terminal on the CTB. (See Fig. 11 and 25.)
15. Connect the red and brown wires from the controller harness
to the CTB. (See Fig. 12 and 25.) The red wire connects to
“R” on the CTB, and the brown wire connects to “C”.
Fig. 12 — Connect Red and Brown Wires to Central
Terminal Board
16. Locate the green wire with yellow stripe from the controller
harness and screw it to the control box (ground). (See
Fig. 13.)
Fig. 13 — Connect Ground Wire From Controller
17. Locate the 48TMHSRSE--A20 harness (with 4-pin female
plug) provided in the hardware kit with the EconoMi$er X
system. Connect the 48TMHSRSE--A20 harness to the
4-wire harness with a male plug from the controller harness.
(See Fig. 14 and 25.)

7
Fig. 14 — Connect 48TMHSRSE--A20 Harness to
Harness from Controller
18. Route the 4-wire 48TMHSRSE--A20 harness through the
divider between the control box and the indoor blower
section. (See Fig. 15.)
NOTE: Some control box configurations may differ.
Fig. 15 — Route 48TMHSRSE--A20 Harness to Indoor
Blower Section
19. Screw the HH79ZZ007 mixed air (MAT) sensor to the left
side edge of indoor blower through pre-punched holes, see
Fig. 16. Confirm that the screws do not interfere with
blower rotation. Connect the (2) spade terminals on the
HH79ZZ007 sensor to the orange and brown wires from the
4-wire 48TMHSRSE--A20 Harness. (See Fig. 16 and 25.)
20. 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.
a. Forward Curve Fan System:
Mount the supply air temperature sensor (provided) to
the lower left section of the indoor fan blower housing.
(See Fig. 16.) 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. 16.)
b. Vane Axial Fan System:
Mount the supply air temperature sensor (provided) to
the fan deck, near the right hand side corner post. (See
Fig. 17.)
Fig. 16 — Mount and Connect Mixed Air Sensor
Brown and Orange
Wire From
9962-0407-SAOEXT
Mixed Air
Temperature
Sensor 9901-2021
Indoor Blower

8
Fig. 17 — Supply Air Sensor Installation W7220 (Vane Axial Fan System)
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.
21. Connect the pink and violet wires from the 4-wire
48TMHSRSE--A20 harness to the pink and violet terminals
in the wire bundle in the indoor blower section. (See Fig. 18
and 25.)
Fig. 18 — Connect Pink and Violet Wires in Indoor
Blower Section
22. If using differential return sensor or DCV sensor. install it
now. See “Installing Differential Return Air Sensor” on
page 16 and the wiring diagram for further information.
23. Assemble the EconoMi$er X hood by screwing the hood
divider to the hood subassembly (top and sides). (See
Fig. 19.) Note on the CRECOMZR080A00 there is also a
center hood filter divider – screw in place. (See Fig. 20.)
NOTE: The CRECOMZR080A00 hood has 2 aluminum filters and a
hood filter divider that installs between the filters.
Fig. 19 — EconoMi$er®X Hood Assembly
To Control Box
PNKVIO Bundle these
connections into
the corner post
with wire tie
GRN GRN
W7220
SAT Sensor
Ref
To Control Box
PNKVIO
GRNGRN
W7220
Ring Terminal
Ref
PL6 Ref
Bundle these
connections
into the corner
post with wire tie
PNK
VIO
VIO
PNK
Pink and Violet
Wires from
48TMHSRSE--A20
Harness
Indoor
Blower
ECONOMIZER P/N A B C D SHIP WT.
CRECOMZR076A00 30.37” 17.43” 19.05” 29.5” 55 lb
CRECOMZR078A00 40.37” 22.28” 24.48” 36.27” 80 lb
CRECOMZR080A00 52.92” 27.03” 33.41” 49.92” 98 lb
AB
CHood Top And
Side Assembly
Hood Divider
D

9
Fig. 20 — Filter Divider on CRECOMZR080A00 Hood
24. Install aluminum filter(s) in EconoMi$er X hood. Clips at top
of hood will hold filters in place. (See Fig. 21.)
Fig. 21 — Fully Assembled Hood
25. Install EconoMi$er X hood over economizer. Screw hood in
place through pre-punched holes. Reinstall the unit’s filter
access door. (See Fig. 22.) Re-install the Indoor blower
access panel. (See Fig. 7.)
Fig. 22 — Install EconoMi$er X Hood and Unit Filter
Access Door
After powering unit controller, program the W7220 controller
per the instructions to follow. See “Programming the W7220
Controller” on page 19. for summarized controller set-up
instructions. After all settings have been made, re-install the
unit control box panel. (See Fig. 7.)
Economizer performance charts are shown in Fig. 23 and 24. See
base unit installation manual to make adjustments to meet building
ventilation requirements.
Fig. 23 — Barometric Relief Flow Capacity
Fig. 24 — Return Air Pressure Drop
Hood Filter
Divider
Hood Top Filter Clip
Outside Air
Cleanable
Aluminum Filter
Barometric
Airflow
Hood
Divider
Filter Door
EconoMi$er X
Hood
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)
CRECOMZR076A00
CRECOMZR078A00
and
CRECOMZR080A00
0
1000
2000
3000
4000
5000
6000
00.10.20.30.4
RETURN AIR FLOW (CFM)
RETURN DUCT STATIC PRESSURE DROP (in. wg)
CRECOMZR076A00
CRECOMZR078A00
CRECOMZR080A00

10
Fig. 25 — Typical EconoMi$er X Wiring Diagram for 1 or 2 Speed Units (Not for 48/50LC 07-12 Units)
Mixed Air Sensor
Field Mount on
Indoor Blower
1
Dry Bulb
Outside Air
Sensor
12-Pin Female
Plug from Economizer
Economizer
Harness
In Unit
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
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
HH79ZZ007 HH79ZZ007
W7220 JADE
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.
LEGEND
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

11
Installation Instructions for 48/50LC 07-12 Units
ONLY
1. Follow Steps 1 through 10 on pages 4-5.
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
controller, as shown below in Fig. 26. This harness can be
discarded.
Fig. 26 — Remove Complete Harness
Factory-Attached to W7220 Controller
NOTE: The 4-wire 48TMHSRSE--A20 harness provided with the
economizer will also NOT be used on the 48/50LC07-12 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. 28 on the
48LCHSRADH--A00 harness attach to the W7220
controller installed in the unit control box. See Fig. 28
and 30. 48LCHSRADH--A00 harness connectors are
labeled to easily 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. 28 on the
48LCHSRADH--A00 harness attach to the unit’s CSC board.
Connect J3 and J5 plugs to the CSC board.
7. Screw the green wire with yellow stripe in the
48LCHSRADH--A00 harness to the control box (ground).
(See Fig. 13 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. (See Fig. 16.) Connect
the (2) spade terminals on the HH79ZZ007 sensor to orange
and brown wires in the indoor blower section wire bundle.
9. Follow Steps 21 through 25 on page 8 in this book.
Fig. 27 — 48TMHSRSE--A20
NOT Used on 48/50LC 07-12 Units
Fig. 28 — 48LCHSRADH--A00 W7220 Controller Harness Shipped With 48/50LC 07-12 Units
IMPORTANT: This section is for economizer installation
instructions on 48/50LC 07-12 units only.

12
Fig. 29 — 48LCHSRADH--A00 W7220 Controller
Harness Shipped With 48/50LC 07-12 Units
Installing Optional HH57AC081 Single Outside
Air Enthalpy Sensor
When using the HH57AC081 (Honeywell C7400S) enthalpy
sensor (see Fig. 32) for outside air changeover, the existing
HH79ZZ007 dry bulb sensor must be removed. The enthalpy
sensor will be mounted in the same location as the dry bulb sensor
(see Fig. 1). When the enthalpy sensor’s OA temperature,
enthalpy and dew point are below the respective setpoints, the
outside air can be used for free-cooling. When any of these is
above the setpoint, free-cooling will not be available. Figure 31
shows the enthalpy boundaries in the W7220 controller. There are
(5) enthalpy boundaries (setpoints ES1 thru ES5), which are
defined by dry bulb temperature, enthalpy, and dew point. ES3 is
the default setting. Table 7 shows the High Limit Curves for each
setting.
NOTE: To use the HH57AC081 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 enthalpy
sensor. See Fig. 25, 29 and 30 for wiring.
NOTES:
1. Harness shown in bold is 48LCHSRADH--A00 harness, which is shipped in the control box of 48/50LC 07-12 units and must be field connected to
the W7220 controller provided with the economizer.
2. Harness attached to the W7220 controller from the Carrier factory is removed and not used with 48/50LC 07-12 units.
Fig. 30 — Typical Wiring Diagram For 48/50LC 07-12 Units

13
Fig. 31 — Enthalpy Curve Boundaries
Table 7 — Single Enthalpy and Dual Enthalpy High Limit Curves
Fig. 32 — HH57AC081 Dimensional, Connection and
Switching information
Table 8 — HH57AC081 Sensor DIP Switch
LEGEND
ENTHALPY
CURVE
TEMP. DRY
BULB (F)
TEMP.
DEWPOINT (F)
ENTHALPY
(btu/lb/da)
POINT P1 POINT P2
TEMP. (F) HUMIDITY
(%RH) TEMP. (F) HUMIDITY (%RH)
ES1 80 60 28.0 80 36.8 66.3 80.1
ES2 75 57 26.0 75 39.6 63.3 80.0
ES3 70 54 24.0 70 42.3 59.7 81.4
ES4 65 51 22.0 65 44.8 55.7 84.2
ES5 60 48 20.0 60 46.9 51.3 88.5
HL 86 66 32.4 86 38.9 72.4 80.3
Economizing
Available
Not Available
Enthalpy
RA Hum (%RH)
RA Temp
Temperature
Absolute Humidity
ES5 ES4 ES3 ES2 ES1 HL
P1
(T,RH)
P2 (T,RH)
Single Enthalpy
Dual Enthalpy
High Limit
USE DIP SWITCH POSITIONS FOR SWITCHES 1,2, & 3
1 2 3
DA OFF ON OFF
RA ON OFF OFF
OA OFF OFF OFF
DA — Discharge Air or Supply Sensor
RA — Return Air
OA — Outside Air
Default setting is OFF-OFF-OFF

14
Installation Instructions for Units with Vane
Axial Fans Only
UNIT ECONOMI$ER X HARNESS ADAPTER KIT
SUPPLEMENT
1. Follow Steps 1 through 10 on page 4-5 and Fig. 17.
2. The 48/50FC (582K/559K, RGC/RAV) and 48/50GC (581K/
551K, RGW/RAW) have a newer style unit control board
(UCB) that will not connect directly to the previous version
of the EconoMi$er X harness. In this case the adapters in this
kit are required.
3. This kit includes (2) wiring harness adapters that are used
only if:
a. Field installing an EconoMi$er X with W7220 controller
b. The field-installed EconoMi$er X accessory has (2)
10-pin inline connector plugs connected to the controller.
(See Fig. 33.)
c. This kit contains these (2) harness adapter:
• 48TC003198 adapter
• 48TC003199 adapter
Fig. 33 — 10-pin Inline Plug
HARNESS ADAPTER KIT INSTRUCTIONS FOR
48TC003198 AND 48TC003199
1. Install the EconoMi$er X W7220 controller in the unit
control box, per economizer instructions. Do not connect
wires.
2. Disconnect the standard unit “ECON’ harness plug (A) from
the unit control board (UCB). (See Fig. 34.)
3. Connect the 12 pin end female (B) of the harness adapter PN
#48TC003199 to the standard unit ECON harness (A)
previously disconnected from the UCB. (See Fig. 35.)
4. Connect the 10-pin female end (D) of the harness adapter
PN# 48TC003199 to the 10-pin male plug from the W7220
controller. (See Fig. 35.)
5. Connect the 12-pin male plug (C) of the adapter
PN# 48TC003198 to the UCB ECON plug. (See Fig. 35.)
6. Connect the 10-pin male (E) plug onto PN# 48TC003198
adapter to the 10-pin female plug from W7220 controller.
(See Fig. 35.)
7. Continue the standard EconoMi$er X installation per
instructions provided. See Fig. 36 for typical wiring.
Fig. 34 — Connection Before Adapters Installed
Fig. 35 — Connections After Adapters Installed
IMPORTANT: This section is for economizer installation
instructions on units with vane axial fan systems only.
A
ECON harness to
PL6 plug. Disconnect
from UCB
Unit Control Board
(UCB)
Connect [E] to
EconoMi$er X
10-pin female
plug
Connect [D] to
EconoMi$er X
10-pin female
plug
48TC003199
Adapter
Unit Control
Board (UCB)
To PL6
AB
C
D
E
48TC003198
Adapter

15
Fig. 36 — Typical Wiring Diagram for 48/50FC 04-16 and 48/50GC 04-14

16
Installing Differential Return Air Sensor
The CRDIFRASN01A00 differential return sensor kit must be
field mounted in the system’s return duct work. The kit includes a
wiring harness that connects the EconoMi$er X harness in the
return chamber of the unit to the provided HH57AC081 sensor.
Wire according to Fig. 37.
In addition to using the HH57AC081 (Honeywell C7400S) sen-
sor (see Fig. 32) for a single enthalpy sensor, it can also be used as
a differential return enthalpy or dry bulb sensor. Figure 31 shows
the dual enthalpy boundaries in the W7220 controller. With dual
enthalpy, The HIGH LIMIT boundary is ES1 when there are no
stages of mechanical cooling energized and HL (high limit) when
a compressor stage is energized. Table 7 shows the High Limit
Curves for each setting.
NOTE: To use the HH57AC081 sensor for differential return air,
the DIP switches on the sensor must be set to ON-OFF-OFF. (See
Table 8.)
When using the CRDIFRASN01A00 differential return enthalpy
or dry bulb temperature option, see Table 9 for California Title 24
setting requirements by region.
Fig. 37 — Wiring Differential Return-Air Sensor
California’s Title 24 High Temperature Limit
Settings
California’s Title 24 code requires a high temperature limit setting
for all dry bulb outside air economizer change over. The
temperatures vary by the region within California. See Table 9 for
high limit settings.
* Only the high limit control devices listed are allowed to be used and at the set
points listed. Others such as Dew Point, Fixed Enthalpy, Electronic Enthalpy, and
Differential Enthalpy Controls, may not be used in any climate zone for
compliance with Section 140.4(e)1 unless approval for use is provided by the
Energy Commission Executive Director.
† At altitudes substantially different than sea level, the Fixed Enthalpy limit value
shall be set to the enthalpy value at 75°F and 50% relative humidity. As an
example, at approximately 6,000 foot elevation, the fixed enthalpy limit is
approximately 30.7 Btu/lb.
Demand Controlled Ventilation
Refer to EconoMi$er X wiring diagram (Fig. 25 and 36) and DCV
instructions if demand controlled ventilation (CO2 sensor) is used.
The CO2 sensor will wire into the blue and black connections at
the controller as shown in Fig. 25, 36, and 38. If a field-installed
CO2 sensor is connected to the EconoMi$er X controller, a
demand controlled ventilation strategy will operate automatically.
As the CO2 level in the space increases above the setpoint (on the
EconoMi$er X controller), the minimum position of the dampers
will be increased proportionally, until the Maximum Ventilation
setting is reached. As the space CO2 level 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.
Fig. 38 — CO2 Wiring Connections to Controller
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
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 TYPE* 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
ENTHALPY†
+ FIXED DRY
BULB
All OAT exceeds 28 Btu/lb of dry air† or
OAT exceeds 75°F
Black Wire
IAQ 2-10 VDC
Blue Wire
IAQ COM

17
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
remote 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 39
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. 40 for typical wiring to
the controller. Refer to codes for proper labeling of light.
Fig. 39 — Thermostat Wired for Remote FDD
Fig. 40 — Annunciator Light Wired for Remote FDD
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
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

18
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
Control Box. See the base unit’s Installation Instructions for the
location 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
keypad on the front of the economizer controller.
Keypad
The four navigation buttons (see Fig. 41) are used to scroll
through the menus and menu items, to select menu items, and to
change parameter and configuration 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 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.
Fig. 41 — W7220 Controller
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.

19
Programming the W7220 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
application with a single outside air sensor.
NOTE: Instead of setting the SETPOINTS, you can use the
defaults 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.
SETPOINTS
• MAT SET: This sets the mixed air temperature (MAT)
setting. 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
DRYBULB SET. The default setting is 63°F but the
controller’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 thru ES5.
Check Table 7 for the limits for each of these settings. 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 single speed
unit there will be only one minimum position setting. The de-
fault 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
keypad 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
default setting is 2 speed.
• AUX OUT: If remote Fault Detection and Diagnostic
(FDD) monitoring is required, select SYS.
OCC: occupancy, always set to INPUT
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
n/a — Not applicable
NOTES:
1. For 2 speed unit, under SYSTEM SETUP: EQUIPMENT= CONV,
AUX2 I = W, and FAN TYPE = 2 SPEED
2. More sophisticated controller setups, including for DCV or power
exhaust, are available by referring to Table 11 options
3. Fan speed options are:
1) 1 Speed
2) 2 Speed
3) 2 Speed: 1 Heat, 1 Cool.
4) 3 Speed: 1 Heat, 2 Cool.
4. Do not use 3 speed setting for LC units.
IMPORTANT: Table 11 illustrates the complete hierarchy.
Menu parameters may be different depending on configuration.
For example, none of the DCV parameters appear for a system
that does not have a DCV (CO2) sensor.
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.
Table 10 — Standard W7220 Controller Configuration
CONTROLLER
MENU ITEM
FOR SINGLE SPEED UNIT FOR 2 SPEED UNIT 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 n/a n/a Only displayed if set up for single speed unit
MIN POS H n/a n/a 4.4 vdc 2 to 10 vdc Only displayed if set up for 2 speed unit
MIN POS L n/a n/a 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 TYPE 2 speed 1 speed 2 speed 2 speed See Note 3
AUX1 OUT NONE SYS NONE SYS Set to SYS for remote FDD monitoring
OCC INPUT INPUT INPUT INPUT Always set to INPUT

20
Table 11 — Menu Structure1
MENU PARAMETER
PARAMETER
DEFAULT
VALUE
PARAMETER
RANGE AND
INCREMENT2NOTES
STATUS
ECON AVAIL NO YES/NO
ECONOMIZING AVAILABLE
YES = economizing available; the system can use outside air for free cooling
when required
ECONOMIZING NO YES/NO
ECONOMIZING ACTIVE
YES = Outside air being used for first stage cooling
NO = Economizing not active
OCCUPIED NO YES/NO
OCCUPIED
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/a COOL
HEAT
HEAT PUMP MODE
(Not available on 2-speed configuration)
COOL Y1-IN OFF ON/OFF
FIRST STAGE COOLING DEMAND (Y1-IN)
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
FIRST STAGE COOLING RELAY OUTPUT
ON = 24 vac on terminal Y1-O; Stage 1 mechanical cooling called on
OFF = 0 vac on terminal Y1-O; no mechanical cooling
COOL Y2-IN OFF ON/OFF
SECOND STAGE COOLING DEMAND (Y2-IN)
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
SECOND STAGE COOLING RELAY OUTPUT
ON = 24 vac on terminal Y2-O; stage 2 mechanical cooling called on
OFF = 0 vac on terminal Y2-O; no stage 2 mechanical cooling
MA TEMP _ _ . _°F (or °C) 0°F to 140°F
(–18°C to 60 °C)
MIXED AIR TEMPERATURE, Cooling Mode
Displays value of measured mixed air from MAT sensor. Displays _ _ . _ if
not connected, short or out-of-range.
DA TEMP _ _ . _°F (or °C) 0°F to 140°F
(–18°C to 60 °C)
DISCHARGE AIR TEMPERATURE, after Heating section
(Accessory sensor required)
Displays when Discharge Air sensor is connected and displays measured
discharge temperature. Displays _ _ . _ if sensor sends invalid value, if not
connected, short or out-of-range.
OA TEMP _ _ . _°F (or °C) –40°F to 140°F
(–40°C to 60°C)
OUTSIDE AIR TEMPERATURE
Displays measured value of outdoor-air temperature. Displays _ _ . _ if
sensor sends invalid value, short or out-of-range.
OA HUM _ _% 0 to 100%
OUTSIDE AIR RELATIVE HUMIDITY
Displays measured value of outdoor humidity from OA sensor. Displays __%
if not connected, short, or out-of-range.
RA TEMP _ _ . _°F (or °C) 0°F to 140°F
(–18°C to 60°C)
RETURN AIR TEMPERATURE
Displays measured value of return air temperature from RAT sensor.
Displays _ _ . _ if sensor sends invalid value, if not connected, short or out-
of-range
RA HUM _ _% 0 to 100%
RETURN AIR RELATIVE HUMIDITY
Displays measured value of return air humidity from RA sensor. Displays
__% if sensor sends invalid value, if not connected, short or out-of-range
IN CO2 _ _ _ppm 0 to 2000 ppm
SPACE/RETURN AIR CO2
(CO2 sensor required, accessory or factory option)
Displays value of measured CO2 from CO2 sensor. Invalid if not connected,
short or out-of-range
DCV STATUS n/a ON/OFF
DEMAND CONTROLLED VENTILATION STATUS
(CO2 sensor required, accessory or factory option)
Displays ON if above set point and OFF if below set point, and ONLY if a
CO2 sensor is connected.
DAMPER OUT 2.0V 2.0 to 10.0-v
Displays voltage output to the damper actuator.
0% = OA Damper fully closed
100%= OA Damper full open
ACT POS _ _% 0 to 100%
Displays actual position of outdoor air damper actuator
2.0-v = OA Damper fully closed
10.0-v = OA Damper full open
ACT COUNT n/a 1 to 65535 Displays number of times actuator has cycled.
1 cycle equals accrued 180° of actuator movement in any direction
ACTUATOR n/a OK/Alarm
(on Alarm menu) Displays Error if voltage or torque is below actuator range
EXH1 OUT OFF ON/OFF
EXHAUST STAGE 1 RELAY OUTPUT
Output of EXH1 terminal:
ON = relay closed
OFF = relay open
EXH2 OUT OFF ON/OFF
EXHAUST STAGE 2 RELAY OUTPUT
Output of AUX terminal; displays only if AUX = EXH2
ON = relay closed
OFF = relay open