RP/IS-F-850S
Installation, Maintenance, and Repair Manual
Series 850 Small, LF850 Small
Double Check Valve Assemblies
1/2" – 2"
Read this Manual BEFORE using this equipment.
Failure to read and follow all safety and use information
can result in death, serious personal injury, property
damage, or damage to the equipment.
Keep this Manual for future reference.
Local building or plumbing codes may require modifications to
the information provided. You are required to consult the local
building and plumbing codes prior to installation. If the
information provided here is not consistent with local building
or plumbing codes, the local codes should be followed.
This product must be installed by a licensed contractor in
accordance with local codes and ordinances.
Need for Periodic Inspection/Maintenance:
This product
must be tested periodically in compliance with local codes, but
at least once per year or more as service conditions warrant.
All products must be retested once maintenance has been
performed. Corrosive water conditions and/or unauthorized
adjustments or repair could render the product ineffective for the
service intended. Regular checking and cleaning of the product’s
internal and external components helps assure maximum life and
proper product function.
Freeze sensor solely provides alerts about a possible freeze event
and cannot prevent a freeze event from occurring. User action is
required to prevent freeze conditions from causing product and/
or property damage.
Series 850 Small Double Check Valve assemblies are designed for
non-health hazard applications to protect drinking water supplies from
dangerous cross-connections in accordance with national plumbing
codes and water authority requirements for non-potable service
applications such as irrigation, fire line, or industrial processing.
Series LF850 Lead Free* Double Check Valve assembly is designed
to prevent the backflow of polluted water from entering the potable
water supply due to backsiphonage and or backpressure.
Both series include a freeze sensor that can be used to indicate
when temperature nears the freezing point. (The sensor is installed
on the assembly exterior and does not alter assembly functions or
certifications.) The sensor relays a signal that triggers notification to
facility personnel to take preventive action in cold temperatures, thus
reducing or eliminating equipment replacement or repair.
LF850-FZ
An add-on connection kit is required to activate the freeze sensor.
Without the connection kit, the sensor is a passive component that
has no communication with any other device. (The kit can also be
used to retrofit existing installations. For ordering details, see
“Add-on/Retrofit Sensor Connection Kit.”
Use of the freeze sensor and activation kit with FZ models does not
replace the need to comply with all required instructions, codes, and
regulations related to installation, operation, and maintenance of the
double check valve assembly.
Watts
®
is not responsible for the failure of alerts due to connectivity
or power issues.
Contents
Installation Guidelines . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2
Vandalism Protection . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3
Freeze Protection . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3
Service Procedure . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4
Testing. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6
Troubleshooting. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6
Parts . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7
Repair Kits. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8
Add-on/Retrofit Sensor Connection Kit . . . . . . . . . . . . . . . . . . . . . . . . . 8
