IEC Modular Hi-Rise Series Installation, Operation & Maintenance Manual page 14

Modular Hi-Rise Series Fan Coils
Supply, Return, and Drain Risers
CAUTION: Toxic residues and loose particles
resulting from manufacturing and field piping
techniques such as joint compounds, soldering
flux, and metal shavings may be present in the unit and
the piping system. Special consideration must be given
to system cleanliness when connecting to solar,
domestic or potable water systems.
Submittals and product literature detailing unit operation,
controls, and connections should be thoroughly reviewed
BEFORE beginning the connection and testing of risers and
piping.
The supply and return connections are marked on the
coil stub-outs and the valve package depending on your
configuration. "CS" means cold water supply, "CR" means cold
water return, "HS" means hot water supply, and "HR" means
hot water return to indicate flow direction to and from the
coil. Blue letters mark the chilled water connections and red
letters mark the hot water connections.
The unit internal piping is designed to accommodate a total
riser vertical movement of ±1-1/2", due to thermal expansion
and/or contraction, when positioned properly at the job site.
Risers must be anchored to the building structure to limit
riser expansion and contraction movement to a maximum
of 3". Riser anchoring and expansion compensation is not
included in the factory-supplied unit and must be field
provided. While some special riser features are available from
the factory, riser end caps, air vents, and/or flushing loops are
normally provided on the job by the installer.
Proper riser installation and vertical positioning in the unit
provides for a unit piping run-out to the service valves which
are centered in the access slots and level or sloping down
slightly away from the riser. This prevents condensation
from running back to the riser and possible damage from
dripping at the bottom of a riser column. Each job has
specific requirements and satisfying those requirements is
the responsibility of the installer.
Riser to Unit Installation
Outer
Cabinet
Riser Stubout
Insulation
Riser Knockout
Slot
Figure 17
Riser Stubout
Insulation
Riser
Connection point to any factory
furnished and installed
components.
Figure 18
Ball
Valve
Back-up
Wrench
Figure 19
14
Unit insulation
Ball
Valve
Threaded
Fitting
Flexible
Hose Kit
Ball
Valve
Ba e
Coil
Wrench
Swivel
Connection
14