TB-21-01
TB-21-01
  TECHNICAL BULLETIN
RS-065/ -130 PRODUCT RELEASE
FUSING UPGRADE FOR RS HUMIDIFIERS
TB #:  TB-21-01
Date: March 9, 2021
Product Lines Affected: RS Series
Overview
In October 2020, the RS-065 208/3 and RS-130 208/3 models were made temporarily unavailable while Condair investigated reports of fusing failures. 
This technical bulletin is to announce the end of the product hold on the two RS models and to outline the design improvements and actions to be taken for existing units in the field. 
Products Affected
  • RS-130 208V/3/50-60Hz humidifiers sold between January 1, 2015 and October 19, 2020 (start of product hold).
  • RS-65 208V/3/50-60Hz Humidifiers sold between January 1, 2015 and October 19, 2020 (start of product hold).
Definition of Issue
RS-130 208/3/50-60Hz humidifiers sold between January 1, 2015 and October 19, 2020 shipped with fuses that were rated close to peak amp draw.   This, combined with warm ambient temperatures, can cause the 50A amp fuse to blow unexpectedly during normal operation. 

The RS-65 208V/3 humidifiers utilize a similar design to the RS 130 208V/3 humidifiers. During this investigation, fusing was also reviewed for the 65 models.  The RS-065 208V/3 humidifiers include 30A and 50A contactors that are unfused, differing from the fused contactor design of the RS 130 208V/3 humidifiers. In the event of a current overload (greater than 50A but less than the 90A fused disconnect), the unfused contactors could overheat and fail.

Condair Action
The design of the RS-130 208V/3 and RS-065 208V/3 units have been updated to address the issues noted above
  1. RS-130 208V/3 models will now include 60A fuses instead of 50A fuses.
  2. RS-65 208V/3 models will now include fused contactors in place of unfused ones. 
With these changes, the product hold on the two affected RS models will be lifted, effective immediately. You may resume sizing and ordering the two humidifiers in the Help software.

Existing humidifiers will require retrofits to upgrade the fusing and contactors as appropriate.
Condair will contact Sales Agents showing sales of these humidifiers between January 1, 2015 and October 19, 2020 and will provide a listing of affected sales orders. Two kits will be available:
  • 2597296 – SP Fuse 60A will be provided to replace 50A fuses in the RS 130 208V/3 humidifiers at no charge. This part number includes a single fuse, a total of 6 fuses are required per RS-130 humidifier.  The estimated time to complete this retrofit is 30 minutes.   

  • 2600373 – SP RS 65 208V Fusing Retrofit will be provided to perform the upgrade to RS-065 208V/3 humidifiers at no charge. The estimated time to complete this retrofit is 90 minutes.  INSTRUCTIONS
As primary wiring is involved, appropriately trained tradespeople are required to install the kits. 
Agent Action
We ask that Condair Agents please reach out to affected customers and arrange installation of the retrofit required kits.
Questions and Support
Please feel free to contact Condair’s Warranty Department, your Regional Sales Manager or myself if you have any questions regarding the RS fusing upgrade.
Best regards,
Marlee Spiegelberg, P.Eng.
Manager, Application Engineering
marlee.spiegelberg@condair.com   |   613-822-0335


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