Tech Bulletin

1 TB-121
Technical Bulletin 121 - Activation Flow Rates at Higher Temperatures
Rinnai America Corporaon • 103 Internaonal Drive, Peachtree City, GA 30269
Toll-Free: 1-800-621-9419 • Phone: [phone] • www.rinnai.us
©2015 Rinnai America Corporaon. Rinnai America Corporaon connually updates materials, and as such, content is subject to change without noce. Local, state,
provincial, federal and naonal fuel gas codes must be adhered to prior to and upon installaon.
WARNING
Water temperature above 120°F (49° C) can cause serious injury. Mixing valve
temperature setting should be done by licensed contractor per local code
requirement. To ensure correct temperature control, use water thermometer at
faucet outlet.
The following dipswitch can be adjusted to opmize water ow acvaon rate when used in the following type
applicaons and the water heater temperature set point is greater than 135°F. The compable models of tankless
water heaters include the following series: VC, KB, KBD, KBP, KCM
 High inlet (ground) water temperature
 Hydronic applicaons
 Hot water recirculaon
Acvate dip switch # 6 to achieve
temperatures higher than 120°F
Acvate dip switch # 7 to opmize water
ow acvaon rate when temperatures
of 135°F and/or higher are being used.