Unit Installation - Johnson Controls JMW Series Installation Operation & Maintenance

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
JMW Unit Location - These units are not designed for
outdoor installation. Locate the unit in an INDOOR area
that allows enough space for service personnel to perform
typical maintenance or repairs.
The installation of water source heat pump units and all
associated components, parts and accessories which
make up the installation shall be in accordance with
the regulations of ALL authorities having jurisdiction
and MUST conform to all applicable codes. It is the
responsibility of the Installing Contractor to determine
and comply with ALL applicable codes and regulations.
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 flushing.
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. Exceeding the minimum bend radius may cause the
hose to collapse which reduces water flow rate. Install
an angle adapter to avoid sharp bends in the hose
when the radius falls below the required minimum
and causes a slight kink.
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 temperature. Insulation is required if loop water
temperature drops below the dew point.
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
pipe threads of the fitting adapters. Prevent sealant from
reaching the flared surfaces of the joint.
Locate the unit in an indoor area that allows easy removal
of access panels, and has enough space for service
personnel to perform maintenance or repair. Provide
sufficient room to make water and electrical connections..
Any access panel screws that would be difficult to remove
after the unit is installed should be removed prior to
setting the unit. These units are not approved for outdoor
installation and, therefore, must be installed inside the
structure being conditioned. Do not locate in areas where
ambient conditions are not maintained within 40-100°F
[4-38°C].
PIPING INSTALLATION
Note: When anti-freeze is used in the loop, assure
that it is compatible with Teflon tape or pipe joint
compound employed.
Maximum allowable torque for brass fittings is 30 ft-lbs
[41 N-m]. If a torque wrench is not available, tighten
finger-tight plus one quarter turn. Tighten steel fittings
as necessary.
WARNING! Piping must comply with all applicable codes.
WARNING! Do not bend or kink supply lines or hoses.
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
R e v . : F e b r u a r y 2 8 , 2 0 2 3

Unit Installation

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WARNING!
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WARNING!
JMW-Series
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