JRE-Series
R e v. : A u g u s t 1 9 , 2 0 2 0
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
I n s t a l l a t i o n , O p e r a t i o n , M a i n t e n a n c e
13
Piping Installation
2”
1.5”
1.5”
* Some units include a painted drain connection.
Using a threaded pipe or similar device to clear
any excess paint accumulated inside this fitting
may ease final drain line installation.
1/8” Per
Foot
Condensate Piping -
Install a condensate trap at each
unit with the top of the trap positioned below the unit
condensate drain connection.
Design the length of the trap (water-seal) based upon the
amount of positive or negative pressure on the drain pan.
As a general rule, 1 inch of trap is required for each 1 inch
of negative pressure on the unit with a 1.5 inch (38 mm)
minimum. Each unit must be installed with a dedicated
trap for that unit.
Note that condensate may be allowed to drain onto
the roof.
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 flushing.
2. Install shut-off/balancing valves and unions at each
unit to permit removal of unit, if required.
3. Place strainers at the inlet of each system circulating
pump to ensure a clean system.
Always insulate where the piping runs through unheated
areas or outside the building. If loop temperature is
maintained between 60°F and 90°F, piping will not
sweat nor lose heat under normal ambient conditions.
Otherwise, insulation is required on loop water piping.
All loop piping above grade must be insulated on any unit
connected to an open or closed geothermal loop (GLHP,
GWHP).
Pipe joint compound is not necessary when Teflon
®
threaded tape is pre-applied to hose assemblies or when
flared-end connections are used. If pipe joint compound
is preferred, use compound only in small amounts on the
male pipe threads of the fitting adapters. Prevent sealant
from reaching the flared surfaces of the joint.
Maximum allowable torque for brass fittings is 30 foot-
pounds. If a torque wrench is not available, tighten
finger-tight plus one quarter turn. Tighten steel fittings as
necessary.
Figure 2: Condensate Drain
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WARNING!
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WARNING!
Piping must comply with all applicable Codes.
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CAUTION!
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CAUTION!
Corrosive system water requires corrosion-
resistant fittings and hoses and may require water treatment.
Note: The manufacturer strongly recommends all piping
connections, both internal and external to the unit, be
pressure tested by an appropriate method prior to any
finishing of the interior space or before access to all
connections is limited. Test pressure may not exceed
the maximum allowable pressure for the unit and all
components within the water system. The manufacturer
will not be responsible or liable for damages from water
leaks due to inadequate or lack of a pressurized leak
test, or damages caused by exceeding the maximum
pressure rating during installation.
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.
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WARNING!
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