Comfort-Aire HKV300A - Manual (Page 11)

Installation, Operation & Maintenance HKV SERIES Heat Controller, LLC
10
Installation of Supply and Return Piping
Follow these piping guidelines.
1. Install a drain valve at the base of each supply and return
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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
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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
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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 or outside the building
or when the loop water temperature is below the minimum
expected dew point of the pipe ambient. Insulation is
required if loop water temperature drops below the dew
point.
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connections are used. If pipe joint compound is preferred, use
compound only in small amounts on the male pipe threads of
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surfaces of the joint.
Table 1: Metal Hose Minimum Bend Radii
Figure 3: Supply/Return Hose Kit
Piping Installation
Note: When anti-freeze is used in the loop, assure that
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employed.
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for use with Heat Controller, Inc., units are available. Similar
hoses can be obtained from alternate suppliers. Supply and
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prevent kinking during installation.
Refer to Figure 3 for an illustration of a Supply/Return Hose Kit.
External Pipe Thread (EPT) adapters secure hose assemblies
to the unit and risers. Install hose assemblies properly and
check them regularly to avoid system failure and reduced
service life.
Rib Crimped
Length
(2 ft [0.6m] Length Standard)
Swivel
Brass
Fitting
Brass
Fitting
EPT
CAUTION! Piping must comply with all applicable codes.
Hoses in Inches Minimum Bend Radius
1” [25.4mm] 5.5” [140mm]
1.25” [31.8mm] 7.0” [178mm]
1.5” [38.1mm] 8.5” [216mm]
CAUTION! Corrosive system water requires corrosion
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WARNING! Do not bend or kink supply lines or hoses.
CAUTION!
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WARNING!
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CAUTION!
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