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c l i m a t e m a s t e r. c o m
T H E S M A R T S O L U T I O N F O R E N E R G Y E F F I C I E N C Y
P a c k a g e d U n i t s
R e v. : 1 / 0 6 / 0 9 B
Piping Installation
CAUTION!
Corrosive system water requires corrosion re-
sistant
fi
ttings and hoses, and may require water treatment.
Installation of Supply and Return Piping
Follow these piping guidelines.
1. Install a drain valve at the base of each supply and
return riser to facilitate system
fl
ushing.
2. Install shut-off / balancing valves and unions at each
unit to permit unit removal for servicing.
3. Place strainers at the inlet of each system
circulating pump.
4. Select the proper hose length to allow slack between
connection points. Hoses may vary in length by +2%
to -4% under pressure.
5. Refer to Table 1. Do not exceed the minimum bend
radius for the hose selected. Exceeding the minimum
bend radius may cause the hose to collapse, which
reduces water
fl
ow rate. Install an angle adapter to
avoid sharp bends in the hose when the radius falls
below the required minimum.
Insulation is not required on loop water piping except
where the piping runs through unheated areas, outside
the building or when the loop water temperature is
below the minimum expected dew point of the pipe
ambient conditions. Insulation is required if loop water
temperature drops below the dew point (insulation is
required for ground loop applications in most climates).
Pipe joint compound is not necessary when Te
fl
on®
thread tape is pre-applied to hose assemblies or when
fl
ared-end connections are used. If pipe joint compound
is preferred, use compound only in small amounts on
the external pipe threads of the
fi
tting adapters. Prevent
sealant from reaching the
fl
ared surfaces of the joint.
Note: When anti-freeze is used in the loop, insure
that it is compatible with the Te
fl
on tape or pipe joint
compound that is applied.
Maximum allowable torque for brass
fi
ttings is 30 ft-lbs
[41 N-m]. If a torque wrench is not available, tighten
fi
nger-tight plus one quarter turn. Tighten steel
fi
ttings
as necessary.
Optional pressure-rated hose assemblies designed
speci
fi
cally for use with ClimateMaster units are available.
Similar hoses can be obtained from alternate suppliers.
Supply and return hoses are
fi
tted with swivel-joint
fi
ttings at one end to prevent kinking during installation.
Refer to Figure 11 for an illustration of a typical supply/
return hose kit. Adapters secure hose assemblies to
the unit and risers. Install hose assemblies properly and
check regularly to avoid system failure and reduced
service life.
A backup wrench is required when tightening water
connections to prevent water line damage for GC series
equipment. TT, TS, GS and GR series equipment have
water connections secured to the corner post.
Installer Caution: After making water connections on
units equipped with ClimaDry, ensure the three union
nuts on the internal three-way water valve are tight.
ClimaDry-equipped units have a manual air bleed valve
at the top of the reheat coil. This valve must be used to
bleed the air from the reheat coil after
fi
lling the system,
for the ClimaDry to operate properly.
Table 1: Metal Hose Minimum Bend Radii
Hose Diameter
Minimum Bend Radii
1/2" [12.7mm]
2-1/2" [6.4cm]
3/4" [19.1mm]
4" [10.2cm]
1" [25.4mm]
5-1/2" [14cm]
1-1/4" [31.8mm]
6-3/4" [17.1cm]
CAUTION!
Do not bend or kink supply lines or hoses.
NOTICE!
Do not allow hoses to rest against structural
building components. Compressor vibration may be
transmitted through the hoses to the structure, causing
unnecessary noise complaints.
Figure 11: Supply/Return Hose Kit
CAUTION!
CAUTION!
CAUTION!
Rib Crimped
Length
(2 ft [0.6m] Length Standard)
Swivel
Brass
Fitting
Brass
Fitting
EPT
CAUTION!
Piping must comply with all applicable codes.
Summary of Contents for Genesis Compact (GC) Series
Page 2: ......
