Carrier CRECOMZR076A00, CRECOMZR078A00, CRECOMZR080A00 User Manual
CRECOMZR076A00
CRECOMZR078A00
CRECOMZR080A00
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
WIRING DIAGRAMS. . . . . . . . . . . . . . . . . . .5-7
INSTALLATION . . . . . . . . . . . . . . . . . . . . . . . .2-8
EconoMi$er X Standard Sensors . . . . . . . . . .8
EconoMi$er X Control Modes . . . . . . . . . .8-14
OPERATION . . . . . . . . . . . . . . . . . . . . . . . . . . .16
TROUBLESHOOTING . . . . . . . . . . . . . . . . . . .17
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 qualied
installer, service agency, or your distributor or branch for information
or assistance. The qualied installer or agency must use factoryauthorized 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 identies the most serious hazards which will result in
severe personal injury or death. WARNING signies 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.
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.
!
WARNING
!
Small Rooftop Products
Select 3 to 12 1/2 Tons
Vertical EconoMi$er X Accessory
CAUTION
!
CUT HAZARD
Failure to follow this caution may result in personal injury.
Sheet metal parts may have sharp edges or burrs. Use care and wear appropriate
protective clothing, safety glasses and gloves when handling parts and servicing
roof top units.
GENERAL
IMPORTANT: These economizers meet the economizer requirements
as laid out in California’s Title 24 mandatory section 120.2 (fault
detection and diagnostics).
The EconoMi$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.
This EconoMi$er X can be used with 1, 2, or 3 speed (48/50LC 07-12)
units.
The EconoMi$er X system utilizes gear-drive technology with a directmount spring return actuator that will close upon loss of power. The
EconoMi$er X system comes standard with an outdoor air temperature
sensor, mixed air temperature sensor. Outdoor enthalpy, indoor
enthalpy, indoor temperature, and CO2 sensors are available for eld
installation. See Table 3 for sensor usage.
Standard barometric relief dampers provide natural building
pressurization control. An optional power exhaust system is available
for applications requiring even greater exhaust capabilities. The power
exhaust set point is adjustable at the EconoMi$er X controller.
See Table 1 for package usage. See Table 2 for package contents. See
Table 3 for sensor usage.
Table 1 - Package Usage
UNIT SIZE PART NUMBER
Small Cabinet, Footprint size: 46 3/4” x 74 3/8” CRECOMZR076A00
Large Cabinet, Footprint size: 58 1/2” x 88 1/8” CRECOMZR078A00
Extra-Large Cabinet, Footprint size: 63 3/8” x 115 7/8” CRECOMZR080A00
Table 2 - Package Contents
PACKAGE NO. QTY CONTENTS
1
Hood Top and Sides
1
Hood Divider
1
Aluminum Filter
CRECOMZR076A00,
CRECOMZR078A00
CRECOMZR080A00
18
Screws
1
EconoMi$er X Assembly
1
HH79ZZ007 Mixed (supply)
Temperature Sensor
1
48TMHSRSE--A20 Harness
1
Hood Top and Sides
1
Hood Divider
1
Hood Filter Divider
2
Aluminum Filters
1
Hardware Bag
1
EconoMi$er X Assembly
1
HH79ZZ007 Mixed (supply)
Temperature Sensor
1
48TMHSRSE--A20 Harness
1
Table 3 - EconoMi$er X Sensor Usage
ECONOMI$ER X WITH OUTDOOR AIR
APPLICATION
Outdoor Air
Dry Bulb
Mixed Air
Sensor
Single
Enthalpy
Differential
Enthalpy
CO2 for
DCV Control
Using a
Wall-Mounted
CO2 Sensor
CO2 for
DCV Control
Using a
Duct-Mounted
CO2 Sensor
†33ZCSENCO2 and CGCDXSEN004A00 are accessory CO2 sensors.
**33ZCASPCO2 and CGCDXASP00100 are accessory aspirator boxes required for ductmounted applications.
††CRCBDIOX005A00 is an accessory that contains both 33ZCSENCO2 and 33ZCASPCO2
accessories.
HH79ZZ007 is factory installed on economizer
HH79ZZ007 provided with economizer and eld installed
33ZCSENCO2 or
CGCDXSEN004A00†
33ZCASPCO2 or
CGCDXASP00100**
DRY BULB SENSOR
Accessories Required
in blower compartment
33ZCSENCO2
CGCDXSEN004A00
and
HH57AC081
HH57AC081
or
OR
CRCBDIOX005A00††
ACCESSORIES LIST
The EconoMi$er X has several eld-installed accessories available to
optimize performance. Refer to Table 4 for authorized parts and power
exhaust descriptions
Table 4 - EconoMi$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 CO2 Sensor (4 to 20 mA) CRCBDIOX005A00
CO2 Room Sensor (4 to 20 mA)
Aspirator Box for Duct Mount
CO2 Sensor (4 to 20 mA)
Space Temperature and CO2 Room Sensor
with Override (4 to 20 mA)
Space Temperature and CO2 Room Sensor
with Override and Set Point (4 to 20 mA)
33ZCSENCO2 or
CGCDXSEN004A00
33ZCASPCO2 or
CGCDXASP001A00
33ZCT55CO2
33ZCT56CO2
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 EconoMi$er X hood components are shipped with the
EconoMi$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)
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 details.
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$er X will be operating under enthalpy control, replace
the factory installed HH79ZZ007 outdoor dry bulb temperature
sensor with accessory enthalpy sensor HH57AC081. (See Fig. 1.)
12. Remove the indoor fan motor access panel. (See Fig. 9.)
13. The mixed (or supply) air temperature sensor looks like an eyelet
terminal with wires running to it. The sensor is located on the
“crimp end” and is sealed from moisture. Locate the sensor in
the economizer hardware bag. Mount the supply air temperature
sensor (provided) to the lower left section of the indoor fan blower
housing. (See Fig. 10.) Use the screw provided and use existing
hole. Locate the orange and brown wires in wire bundle in the
indoor fan section. Connect the orange and brown wires to the
corresponding connections on the supply air temperature sensor.
(See Fig. 8.)
Wiring
Harness
Actuator
(Hidden)
HH57AC081
Enthalpy Accessory
Location (Field
Installed)
WARNING
!
ELECTRICAL SHOCK HAZARD
Failure to follow this warning could result in personal injury and/
or death.
Disconnect power supply and install lockout tag before attempting
to install accessory.
HH79ZZ007
Outside Air
Temperature
Sensor
Fig. 1 - EconoMi$er X Component Locations —
(Small Cabinet Economizer Shown)
2
Filter Access Panel
Fig. 2 - Typical Outdoor-Air Section
Outdoor-Air Opening and
Indoor Coil Access Panel
Access Panel Locations
A
B
Compressor
Access Panel
Wiring
Harness
Hood Filter
Divider
Fig. 4A - Hood for Extra Large Cabinet
HVAC Unit Filters
C
Hood Divider
D
Hood Top and
Side Assembly
Fig. 3 - Hood Assembly
ECONOMIZER P/N A B C D SHIP WT.
CRECOMZR076A00 33.37” 17.43” 19.05” 29.5” 55 lb
CRECOMZR078A00 40.37” 22.28” 24.48” 36.27” 80lb
CRECOMZR080A00 52.92” 27.03” 33.41” 49.92” 98lb
NOTE: The CRECOMZR080A00 hood has 2 aluminum lters and a
hood lter divider that installs between the lters. (See Fig. 5A.)
Hood Top
Filter Clip
Outside Air
EconoMi$er X
Fig. 5 - EconoMi$er X Installed in HVAC Unit
Unit Filter
Rack
Unit Base
Insert
Screw in
EconoMi$er X
Flanges
(Small Cabinet Economizer Shown)
EconoMi$er X
Hold Down Tab
EconoMi$er X
Hood
Divider
EconoMi$er IV Rear Flange
Fig. 6 - Rear EconoMi$er X Flange Installation
(Small and Large Cabinet)
Cleanable
Aluminum Filter
Barometric
Airow
Fig. 4 - Filter Installation
3
14. While everything is open install and wire any other accessories
Plug 10-pin plug from
and/or sensors as applicable and convenient, per their installation
instructions and/or the Conguration section of this instruction.
Some accessories require that unit ducting already be installed.
NOTE: If also installing a power exhaust accessory, skip step 16 and
follow the power exhaust instructions instead.
16. Install the EconoMi$er X hood over the EconoMi$er X. Use
screws provided.
17. The W7220 EconoMi$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. For 1 and 2 speed units connect the plugs coming from the
controller as shown in wiring diagram, Fig. 7 and 8A.
NOTE: Provided 48TMHSRSE--A20 harness will be connected as
shown below.
19. For 3 speed (48/50LC 07-12) units, the harness attached to the
W7220 econoMi$er X controller must be removed, and can be
discarded. Locate harness 48LCHSRADH--A00 shipped in
plastic bag in the control box of unit. Attach this harness to the
W7220 controller as shown in Fig 8B and 8C.
NOTE: Harness 48TMHSRSE--A20 provided with economizer is not
used with 3 speed (48/50LC 07-12) units.
20. Adjust controller settings (minimum position, outside air, etc.) per
instructions detailed later in this instruction.
21. Follow all local and other applicable codes.
Unplug the 10-pin plug from
PL6 from the Central Terminal
Board (in control box) and plug
into 10-pin plug from W7220
Indoor Blower
Section
SAT
PL6
Connect SAT sensor and Pink
and Violet wires from PL6 to
the 48TMHSRSE—A20
harness.
BRN
ORN
Control box
W7220 into ECONO
terminals on Central
Terminal Board
W7720
48TMHSRSE--A20
harness with 4- pin
plug
Central
Term Brd
See Picture
ECONO
Economizer X
Fig. 7 - Harness Detail
WIRING INSTRUCTIONS FOR 1 AND 2 SPEED UNITS:
A. Install W7220 (with harnesses attached) in unit control box. See
wiring diagram in instructions.
B. Unplug econo harness from PL6 with 10-pin plug shown above in
picture, from Central Terminal Board (CTB).
C. Attach 10-pin plug disconnected from (CTB) to 10- pin plug
harness from W7220 controller.
D. Connect other 10-pin plug from W7220 controller into ECONO
terminals on CTB. See picture above.
E. Connect 4-pin plug from the W7220 controller to the 4-pin
48TMHSRSE—A20 harness provided with economizer accessory.
F. Route 48TMHSRSE—A20 harness back to the indoor blower
section of the unit.
G. Mount Supply (or Mixed) Air Temperature sensor, and connect
Brown and Orange wires from harness to the SAT.
H. Connect Pink and Violet wires from 48TMHSRSE—A20 harness
to the Pink and Violet wires from PL6 economizer harness
4
48TMHSRSE--A20
If using HH57AC081 outside air
enthalpy accessory, the OAT must be
removed and disconnected. Set sensor
dip-switches, see Table 11.
Fig. 8A - Typical EconoMi$er X Wiring Diagram For 1 and 2 Speed Units
(2 Speed Diagram Shown)
Harness
5
Fig. 8B - Typical EconoMi$er X Wiring Diagram For 3 Speed Units (48/50LC 07-12)
(See 3 Speed Unit Instructions for Complete Diagram)
NOTES:
1. Wires shown in bold are part of 48LCHSRADH--A00 harness
which is provided with 48/50LC 07-12 3 speed units.
2. Harness 48TMHARSE--A20 which is provided with
economizer accessory is not used on 3 speed units.
6
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