to the underside of a wooden sub-floor. This system
is available; however, the below floor plate system
is more energy efficient.
If outdoor air is required for ventilation, a
separate make-up air system should be installed.
Per the Standard Mechanical Code, the temperature of
these heating systems should not exceed an operating
temperature of 60 degrees C (125 degrees F), when
the piping is used in gypsum assemblies.
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The radiant floor heating system shall include all piping, manifolds,
valves, pumps, expansion tank, pressure relief valves, and controls to
provide a complete and operational heating system.
2.7.1
Tubing
The tubing material shall comply with ASTM F 876. The pipings shall be
provided with a factory applied oxygen barrier with a diffusion rate that
does not exceed 0.1 grams per cubic meter per day. The piping shall be
rated at 689 kPa 100 psi and 82.5 degrees C 180 degrees F.
2.7.2
Joints
The manifold manufacturer shall be consulted to determine the proper joint
for connection of tubing to the manifold. The joints required to connect
the tubing to the manifold shall be compression type fittings using crimp
rings, a combination of inserts and O-rings, gripper type fittings using a
retainer ring and O-rings, or as otherwise recommended by the manifold and
tubing manufacturer.
2.7.3
Manifold
The design and construction of the manifold shall be compatible with the
tubing manufacture's requirements. The piping manifold material shall be
compatible with the piping material. The manifold shall be capable of
providing the number of circuits as indicated on the drawings. The
manifold shall be suitable for an operating pressure of 689 kPa 100 psi and
82.5 degrees C 180 degrees F. Balancing valves shall be provided for each
circuit. Isolation valves shall be provided for each supply and return
connection. Each manifold shall be provided with an air vent. The
manifold shall allow for the measurement of temperature for each circuit.
The manifold shall be provided with all required mounting hardware.
2.8
UNIT HEATERS
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NOTE: Indicate capacity of unit heaters and heating
and ventilating units on drawings. Show typical
piping details on drawings for these units.
In critical areas where maximum noise level limits
are required, the sentence in brackets will be
retained and the brackets deleted. The maximum
acceptable noise limits for these critical areas
will be determined in NC level or dbA and should be
indicated on the drawings. The sentence in brackets
SECTION 15569A
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