Carrier 50GCQ Series - Additional RTU Open Installation and Troubleshooting; Economizer Systems

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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$er
®
X and
EconoMi$er IV) and one without a control system
(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.
Fig. 52 — EconoMi$er X Component Locations
Fig. 53 — EconoMi$er IV Component Locations
Fig. 54 — EconoMi$er 2 Component Locations
IMPORTANT: Any economizer that meets the economizer
requirements as laid out in California’s Title 24 mandatory
section 120.2 (fault detection and diagnostics) and/or
prescriptive section 140.4 (life-cycle tests, damper leakage,
5 year warranty, sensor accuracy, etc), will have a label on the
economizer. Any economizer without this label does not meet
California’s Title 24. The 5 year limited parts warranty
referred to in section 140.4 only applies to factory-installed
economizers. Please refer to your economizer on your unit.
Honeywell
HH79AH001
EconoMi$er X
Harness
Outside Air
Temperature Sensor
EconoMi$er IV
Controller (W7212)
Outside Air
Temperature Sensor
Low Ambient
Sensor
EconoMi$er2 Plug
Outside Air
Temperature Sensor