Carrier TC Owner's manual

Factory---Installed Economizers
for TC/TCQ/HC/HCQ/LC/KC/KCQ
Rooftop Units
3to27.5NominalTons
Economizer Supplement Related To
California Title 24
California’s new Title 24 is effective July 1, 2014 and requires several new
economizer features.
This supplement details these economizer updates and is to be used in
conjunction with the base unit installation instructions for the following
3 to 27.5 nominal ton models: TC/TCQ/HC/HCQ/LC/KC/KCQ.
Supplement Index:
SEconoMi$er 2 DDC Title 24 offerings and definitions Page 2.................
NOTE: Wiring diagrams and instructions do not change.
SEconoMi$er X Title 24 electro--mechanical offerings and definitions Pages 3--24...
This includes set up, start up and menu structure information.
Title 24 Note: Because the economizer factory--installed in the unit is Title 24 listed by the
California Energy Commission (CEC), field economizer commissioning is not required.

2
Title 24 EconoMi$er 2 Supplement
The DDC economizer factory--installed in this rooftop unit meets some parts or all of the requirements of
the new California Title 24 economizer standards.
There are (2) significant parts to the economizer section of Title 24:
—Mandatory section 120.2 Economizer Fault Detection and Diagnostics (FDD). This section’s
intent is to allow only California Energy Commission (CEC) listed economizer controllers to be
used to properly determine when an economizer control system fails and identifying the specific
failure. If your unit has either of these (2) Carrier control systems, the economizer meets Title 24
section 120.2 mandatory FDD requirements.
SSystemVu control system
(A field--installed Return Air Temperature sensor accessory is required to meet Title 24.)
SComfortLink control system
(A field--installed Return Air Temperature sensor accessory is required to meet Title 24.)
SRTU Open control system
—Prescriptive section 140.4 deals with several economizer related issues including minimal
damper leakage, damper life cycle testing, 5 year economizer warranty, etc. Because section
140.4 is “prescriptive” they may not be required on some jobs. When an economizer with “Ultra
Low Leak” dampers is ordered, it meets the section 140.4 requirements.
NOTE: These economizers also meet ASHRAE 90.1 requirements.
Carrier factory--installed economizers that meet some or all of Title 24 are:
ECONOMIZER TYPE CONTROLLER DAMPER MEETS TITLE 24
Economizer 2 SystemVu Ultra Low Leak Section 120.2 and 140.4
Economizer 2 ComfortLink Ultra Low Leak Section 120.2 and 140.4
Economizer 2 ComfortLink Standard Leak Section 120.2
Economizer 2 RTU Open Ultra Low Leak Section 120.2 and 140.4
Economizer 2 RTU Open Standard Leak Section 120.2
NOTE: PremierLink controller does not meet Title 24 section 120.2
SUP--TI24--02SI

3
Title 24 EconoMi$er X Supplement
ELECTRO--MECHANICAL CONTROLS
The economizer factory--installed in this rooftop unit meets some parts or all of the requirements of the new
California Title 24 economizer standards.
There are (2) significant parts to the economizer section of Title 24:
—Mandatory section 120.2 Economizer Fault Detection and Diagnostics (FDD). This section’s
intent is to allow only California Energy Commission (CEC) listed economizer controllers to be
used to properly determine when an economizer control system fails and identifying the specific
failure. Carrier offers the EconoMi$er X control system, using the W7220 Honeywell controller,
that meet the mandatory section 120.2 FDD requirements:
—Prescriptive section 140.4 deals with several economizer related issues including minimal
damper leakage, damper life cycle testing, 5 year economizer warranty, etc. Because section
140.4 is “prescriptive” they may not be required on some jobs. When an economizer with “Ultra
Low Leak” dampers is ordered, it meets the section 140.4 requirements.
NOTE: These economizers also meet ASHRAE 90.1 requirements.
Carrier factory--installed economizers that meet some or all of Title 24 are:
ECONOMIZER TYPE CONTROLLER DAMPER MEETS TITLE 24
EconoMi$er X Honeywell W7220 Ultra Low Leak Section 120.2 and 140.4
EconoMi$er X Honeywell W7220 Standard Leak Section 120.2
The EconoMi$er X W7220 controller is factory set for either a 1 speed or 2 speed unit, depending upon
the unit ordered.
NOTE: EconoMi$er X can also be used with 3 speed LC units.
The following section provides general information and typical wiring diagrams for the W7220
controller.
SUP--TI24--02SI

4
C14243
Fig. 1 -- Example of an EconoMi$er X Wiring Diagram for a Single Speed Unit --
NOTE: For details pertaining to a specific unit, see the Wiring Diagram label on the unit.
SUP--TI24--02SI

5
C14336
Fig. 2 -- Example of an EconoMi$er X Wiring Diagram for a 2 Speed Unit --
NOTE: For details pertaining to a specific unit, see the Wiring Diagram label on the unit.
SUP--TI24--02SI