C L I M A T E M A S T E R W A T E R - S O U R C E H E A T P U M P S
Tranquility
®
Compact Belt Drive (TCH/V) Series
Rev.: July 25, 2017
32
C l i m a t e M a s t e r Wa t e r - S o u rc e H e a t P u m p s
Piping Installation
CAUTION!
Corrosive system water requires corrosion
resistant fi ttings and hoses, and may require water treatment.
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]
1-1/2" [38.1mm]
8.5" [21.6cm]
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
MPT
MPT
CAUTION!
Piping must comply with all applicable codes.
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 Tefl 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 antifreeze is used in the loop, ensure that it is
compatible with the Tefl 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
specifi 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.
If the unit is connected to existing ductwork, a previous
check should have been made to ensure that the
ductwork has the capacity to handle the airfl ow required
for the unit. If ducting is too small, as in the replacement
of a heating only system, larger ductwork should be
installed. All existing ductwork should be checked for
leaks and repaired as necessary.
WARNING!
Polyolester Oil, commonly known as POE oil, is
a synthetic oil used in many refrigeration systems including
those with HFC-410A refrigerant. POE oil, if it ever comes
in contact with PVC or CPVC piping, may cause failure of
the PVC/CPVC. PVC/CPVC piping should never be used
as supply or return water piping with water source heat
pump products containing HFC-410A as system failures and
property damage may result.
WARNING!
