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7
JOHNSON CONTROLS
FORM 115.20-NOM6 (1106)
PIPING
All piping connections are 5/8" OD copper tubing
(see Fig.4).
The supply and return piping must be adequately
sized to meet the design water flow requirements as
specified for the specific installation. All chilled water
piping must be insulated to prevent condensation. It
is also recommended that all piping be insulated to
prevent freezing when piping is run in an uncondi-
tioned space.
Coil freeze protection is recommended
for applications where the fan coil is
located in ambient air locations (attics,
crawl spaces, etc.) or within structures
that may be unoccupied during freez-
ing conditions. Consult the factory for
additional information.
Piping Precautions
• Flush all piping prior to connection to remove
all debris.
• Use wet cotton rags to cool valve bodies when
soldering.
• Open all valves (midway for hand valves,
manually open on motorized valves) prior to
soldering.
• When soldering to bronze or brass, heat the piping
while in the socket/cup and begin introducing the
solder when the flux boils rapidly. Avoid direct
flame into the solder joint.
• Heat can only be applied to the cup of the valve
body for a minimal time before damage occurs
(even with the use of wet rags).
• Avoid rapid quenching of solder joints, as this
will produce joints of inferior quality.
• Connect all piping per accepted industry
standards and observe all regulations governing
installation of piping systems. When all
connections are complete, the system must be
pressure tested. Repair any solder joint leaks and
gently tighten any leaking valve packing nuts
and piping accessories as required. Hydronic
systems are not designed to hold pressurized air
and should only be tested with water.
When connecting piping or valve
kits to fan coil units, do not bend or
reposition the coil header tubing for
alignment purposes. This could cause
a tubing fracture resulting in a water
leak when water pressure is applied
to the system
FIG. 4 – CW-HW SERIES UPFLOW WALL / CLOSET FAN COILS
4-Pipe Chilled Water-Hot Water (190 - 1085 CFM)
INSTALLATION
LD12277A