15
of risers must be provided by
installing contractors.
Once all field riser joints
are completed and the riser
assembly is properly anchored, a
hydrostatic test for leaks should
be made, but test pressure must
not exceed 250 psi, measured
at the bottom of the riser. At
this time, prior to insulating and
furring in of any risers or piping
connections, all coils should
be vented, and the interior unit
piping checked for visible signs
of leakage due to possible
shipping damage or mishandling.
The coil manual air vent is
accessible through the return-air
opening. After the test, insulate
all risers continuously from
top to bottom, if not provided
by factory. All unit piping and
water coils must be protected
from freezing after filling with
water. All leaks should be
repaired before proceeding with
installation.
All field-furnished and installed
riser insulation must have
a vapor barrier cover, or be
closed-cell foam insulated. All
joints should be properly sealed
(taped or glued) so no air can
pass through to the cold riser
pipe. Any water damage caused
by not following this procedure is
not covered under the warranty.
The riser connection joints
should be hydrostatically tested
for leaks before furring in the
unit.
Pressure of water column alone
is approximately 0.43 psi per
foot; i.e., 43 psi for each 100 feet.
DO NOT EXCEED 250 PSI or that
which the supplied components
were designed.
To assure compliance with
existing building codes, the
installing contractor must restore
the original fire resistance rating
of the structure by sealing
the access space around the
risers with material having the
same fire ratings as structure.
Applicable local installation
codes may limit this unit to
installation in single-story
residences only. Any fireproofing
requirements where risers or
piping penetrate the floors or
walls are the responsibility of
the installing contractor. This
work should only be done after
all pressure testing is complete.
Whatever method is used for
fireproofing must be able to
accommodate pipe expansion
and contraction. The piping
must be protected from abrasion
and/or chemical attack. Pipe
insulation must be maintained to
prevent condensation and should
be protected from damage at the
joint between the insulation and
fireproofing material.
Installation
positioning, fastening
and testing
Installation
