If one of the internal motor t-stats (clicks-on device) fails, it is permissible to bypass that device at the motor terminal plate (motor j-box) RTD studs to still allow proper protection into the E3 & E4 compressor module inputs.
There is sufficient protection to allow the motor not to run in an unsafe manner. The CTs will monitor overcurrent and will protect the chiller if the motor is overheating.
See wiring diagrams for reference:
RTAA-IOM-3
RTAA-W-2
RTAA-IOM-4A
RTWA-IOM-1A
RTAA-SVX-01A-EN
RLC-SVX07A-EN
This wiring information is also available in the individual chiller wiring diagrams.
Example: Circuit 2 compressor module wiring: (move either wire 65A or 64A as needed to RTD studs RT or GT as needed.)
Information in this article is intended for use by individuals possessing adequate backgrounds of electrical and mechanical experience and who comply with all federal, state, and local laws, rules, orders, or regulations related to the installation, service, or repair of a heating or central air conditioning product. Any attempt to install, service, or repair a heating or central air conditioning product may result in personal injury and/or property damage. The manufacturer or seller cannot be responsible for the interpretation of the information contained herein, nor can it assume any liability in connection with its use.