Johnson Controls JMW Series - Unit Installation

JMW-Series
Rev.: February 28, 2023
THE SMART SOLUTION FOR ENERGY EFFICIENCY
Installation, Operation, Maintenance
9
Unit 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 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. Exceeding the minimum bend radius may cause the
hose to collapse which reduces water ow 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 Teon
threaded tape is pre-applied to hose assemblies or when
ared-end connections are used. If pipe joint compound
is preferred, use compound only in small amounts on the
pipe threads of the tting adapters. Prevent sealant from
reaching the ared surfaces of the joint.
PIPING INSTALLATION
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.
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
sufcient room to make water and electrical connections..
Any access panel screws that would be difcult 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].
⚠ WARNING! ⚠
WARNING! Piping must comply with all applicable codes.
⚠ WARNING! ⚠
WARNING! Do not bend or kink supply lines or hoses.
Note: When anti-freeze is used in the loop, assure
that it is compatible with Teon tape or pipe joint
compound employed.
Maximum allowable torque for brass ttings is 30 ft-lbs
[41 N-m]. If a torque wrench is not available, tighten
nger-tight plus one quarter turn. Tighten steel ttings
as necessary.