Additional Rtu Open Installation And Troubleshooting; Economizer Systems - Carrier 50GCQ Series Service And Maintenance Instructions

Additional RTU Open Installation and Trouble-
shooting
Additional installation, wiring and troubleshooting information
for the RTU Open Controller can be found in the following
manual: "RTU Open Multi-Protocol Controller Factory-
Installed Option — Controls, Start-up, Operation and Trouble-
shooting Instructions."

ECONOMIZER SYSTEMS

The unit may be equipped with a factory-installed or accessory
(field-installed) economizer system. Three types are available:
2 with logic control systems (EconoMi$er
EconoMi$er IV) and one
(EconoMi$er 2). See Fig. 52-54 for component locations on
each type.
NOTE: For 50GCQ rooftop units EconoMi$er IV is only avail-
able as a field-installed accessory.
Economizers use direct-drive damper actuators.
IMPORTANT: Any economizer that meets the economizer
requirements as laid out in California's Title 24 mandatory
section 120.2 (fault detection and diagnostics) and/or
prescriptive section 140.4 (life-cycle tests, damper leakage,
5 year warranty, sensor accuracy, etc), will have a label on the
economizer. Any economizer without this label does not meet
California's Title 24. The 5 year limited parts warranty
referred to in section 140.4 only applies to factory-installed
economizers. Please refer to your economizer on your unit.
Outside Air
Temperature Sensor
Fig. 52 — EconoMi$er X Component Locations
® X and
without a control system
EconoMi$er X
Harness
Outside Air
Temperature Sensor
Low Ambient
Sensor
Fig. 53 — EconoMi$er IV Component Locations
Outside Air
Temperature Sensor
Fig. 54 — EconoMi$er 2 Component Locations
33
EconoMi$er IV
Controller (W7212)
EconoMi$er2 Plug