FAFCO 500 Series Installation Manual page 13

FAILURE TO PROPERLY CONNECT FITTINGS CAN RESULT IN LEAKS.
Plastic Tubing
• Provided FAFCO tubing is weather resistant.
• PEX (Cross-Linked Polyethylene) tubing approved
for use with push fittings may be used, but must not
be exposed to sunlight.
• Plastic tubing will expand and contract at different
temperatures.
• Tubing should be supported at a minimum of 36" to
prevent excessive load to the connectors.
• Do not install tubing supports closer than 3" from the
connector ends.
• The tube edges must be smooth and free of rough
edges and burrs before inserting into push fittings.
Push Fittings Assembly
Figure 1 - Tubing Cutter
Cut the tubing to length using a tubing cutter. Inspect
the outside diameter of the tubing. It must be free of
damage, smooth, and clean. (See Figure 1.) Measure
the insertion depth on the tubing end. Push fittings
have an insertion depth line molded onto the outside of
the connector bodies. Make certain to push the tubing
Tube Stop
Figure 2 - Insertion Depth
completely into the fitting until it comes into contact with
the internal tubing stop. (See Figure 2.) To disconnect,
ensure the system is depressurized before removing
fittings. Fittings are reusable and easy to connect and
Tube Stop
disconnect. Push the collet in squarely against the face
of the fitting. With the collet held in this position, the
tubing can be removed.
SYSTEM OVERVIEW
COMPONENT OVERVIEW
(ON-DEMAND FOR GAS OR ELECTRIC)
Tubing and Fittings
Overview (continued)
Tube Installation
• A support liner and collet clip must be used on
every tube fitting to prevent tube disengagement.
(See Figure 3.)
Collet Clip
(open)
Support Liner
Collet Clip
(closed)
Figure 3 - Tube Installation
Push Fittings Cannot be Exposed to the
Following Chemicals:
• Pipe dopes (e.g., liquid thread sealant), leak-check
compounds, bug sprays, lubricants, cleaners,
paints, bleaches, acids, solder fluxes, plastic
piping primers and cements, oxidizing agents,
alkaline solutions, thinners, fuels, oil-based caulk,
hydrocarbons, spray foam, or foaming agents
Caution: Galvanized piping and fittings are not
compatible with heat transfer fluid and cannot
be used in collector loop plumbing.
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