How to Guide

112
Plastics Technical Manual
Hydronic Heating Applications
The table below highlights key points to remember when
installing FlowGuard Gold
®
orCorzan
®
CPVC in a hydronic
radiant heating application. A hydronic radiant heating
application is defined here as piping directly off a water
heater or boiler into a coil heating unit in single- or multi-
family homes.
“DOs” for all hydronic applications
• DoinstallCPVCSchedule80domesticwatersystemsusing
IPS P-70 or Oatey Industrial Grade primers.
• Do install CPVC Schedule 80 domestic water systems
usingIPS714orOateyCPVCHeavyDutyOrangesolvent
cements.
• InstallinaccordancewithbothCharlottePipeandFoundry’s
andsolventcementmanufacturer’srecommendationsand
installation instructions.
• Followrecommendedsafeworkpractices.
• Verifythatthemaximumoutlettemperatureandpressureof
the boiler is less than the temperature and pressure rating
of the pipe (see charts below).
• Always use the proper derating factors with FlowGuard
GoldandCorzanCPVCpipetondthepressureratingat
the applicable operating temperature.
• Always follow applicable codes and approvals when
installing plumbing and heating equipment.
• Ensurethatthesystemdesignallowsforthermalexpansion
and contraction as recommended in the Charlotte Pipe and
FoundryPlasticsTechnicalManual.
• UseonlyCPVCxbrassthreadedtransitionttingswhen
installing FlowGuard Gold systems.
• Usepropersolventcementingpractices,includingbeveling
andproperdaubersizing.
• Alignallpipingsystemcomponentsproperlywithoutstran.
Do not bend or pull pipe into position after being solvent
welded.
• ProvideadditionalsupporttothebrasssideofaCPVCx
brass transition or other metallic components to support
the weight of the metal system.
• Usecheck valves, heat traps or back ow preventer to
prevent cross-connections between hot and cold water
lines.
• Flush the interior of heat exchangers or the exterior of
condenser coils thoroughly with mild ionic detergent solution
to remove incompatible oils prior to piping installation.
• Rinse with clean water to purge the system as a nal
flushing.
• Verifythatallboilercleaningandsealingchemicalsused
in the hydronic radiant heating system are compatible with
CPVC.
SPECIAL CONSIDERATIONS
“DON’Ts” for all hydronic applications
• Do not exceed the operating temperature or operating
pressure of the piping system.
• DonotuseCPVCmaleorfemaleadapterswithplastic
molded threads for FlowGuard Gold systems.
• DonotusetheCPVCpipingsystemtosupportanymetallic
components.
• Do not use compression ttings for hydronic radiant
heating applications.
• Donotusesolventcementthatexceedsitsshelflife,has
become discolored or has gelled.
• DonotuseCPVCteesorotherCPVCcomponentsashot
and cold mixing devices.
• Do not apply excessive solvent-cement to the joints.
Puddling of solvent cement must be avoided.
• Do not rely on an expansion tank to handle thermal
expansion of the piping system. Expansion tanks
accommodate expansion of the fluid, not longitudinal
expansion of the pipe. The piping system must be designed
to allow for thermal expansion.
Prior to installing PVC or CPVC piping in hydronic
applications, it is important to flush the interior of the heat
exchangers and the exterior of the condenser coils
thoroughly with a mild ionic detergent solution to remove
incompatible oils. Failing to do so could result in system
failure and property damage.
Verify that all boiler cleaning and sealing chemicals used in
hydronic radiant heating systems are compatible with PVC
or CPVC. Failure to do so could result in system failure and
property damage.
Equipment leaks in refrigeration or HVAC systems may
release POE oils or other contaminants into the piping
system. These oils and contaminants are incompatible with
PVC or CPVC and such exposure may result in pipe or
fitting failure regardless of flushing.