UPS and Power to One Circuit

Can I use UPS on my chiller?

Can I provide power to just one circuit with a generator?

Rapid Restart

Genset not big enough

• Rapid Restart and using a UPS to the chiller controller.
• UPS powering controls to reduce reboot time

1. WILL reduce reboot time:
   1. RTAC (CH530) with mechanical starters (YDS, XLS)
   2. RTHD-YDS (CH530 or UC800)
   3. RTWD (CH530)
   4. CGAM (CH530)
2. WILL NOT reduce boot time (and may cause latching diagnostic):
   1. RTAE (UC800)
   2. RTAF (UC800)
   3. RTHD-AFD (UC800)

   4. RTAC (UC800) with AFD retrofit
       

      Question / Section	CGAM (CH530)	RTAC (CH530)	RTAC (UC800)	RTAE (UC800)	RTAF (UC800)
      Can I use UPS on my chiller?	Yes	Yes See RLC-PRB026-EN	Yes - Wye Delta or X-line compressor starter No - VSD compressor starter	No. The drives will know that the controller is not connected to 3 phase power and the drives will generate a "Latching" fault diagnostic. This diagnostic would require a manual reset of the chiller.	No. The drives will know that the controller is not connected to 3 phase power and the drives will generate a "Latching" fault diagnostic. This diagnostic would require a manual reset of the chiller.
      Can I provide to power to just one circuit w/generator?	No. The controls will expect both circuits to be powered. It will result in comm loss diagnostics.	No. The controls will expect both circuits to be powered. It will result in comm loss diagnostics.	No. The controls will expect both circuits to be powered. It will result in comm loss diagnostics.	No. The controls will expect both circuits to be powered. It will result in comm loss diagnostics or AFD/VFD drive fault.	No. The controls will expect both circuits to be powered. It will result in comm loss diagnostics or AFD/VFD drive fault.
      I want to demand limit my chiller to 50% so only one circuit will run.	□ Use circuit lockout [click]	Use circuit lockout	Use circuit lockout	Use circuit lockout	Use circuit lockout

Notes

• If customers do not apply an appropriately sized generator; the customer can power the entire unit, but lock out one circuit via the unit display (that means the circuits are powered, but not allowed to run via the controls). Controls diagnostics will result if the entire unit controls are not powered.
• Local codes may prohibit generator sizing less than chiller nameplate minimums.

WARNING:

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.