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
16
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
Tr a n q u i l i t y 1 6 ( T C ) S e r i e s
R e v. : 2 5 J u l y, 2 0 1 7
Piping Installation
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 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.
A backup wrench is required when tightening water
connections to prevent water line damage for TC Series
equipment. TS Series equipment has water connections
secured to the corner post.
Table 1: Metal Hose Minimum Bend Radii
Hose Diameter
Minimum Bend Radii
12.7mm
6.4cm
19.1mm
10.2cm
25.4mm
14cm
31.8mm
17.1cm
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
Rib Crimped
Length
(0.6m Length Standard)
Swivel
Brass
Fitting
Brass
Fitting
MPT
MPT
CAUTION!
Corrosive system water requires corrosion
resistant fi ttings and hoses, and may require water
treatment.
CAUTION!
Do not bend or kink supply lines or hoses.
CAUTION!
CAUTION!
CAUTION!
CAUTION!
Piping must comply with all applicable codes.
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!
