psi. Condensers shall be complete with refrigerant relief valve/rupture
disc assembly, water drain connections, and refrigerant charging valve.
Low pressure refrigerant condenser shall be provided with a purge valve
located at the highest point in the condenser to purge non-condensibles
trapped in the condenser. Condenser shell shall be constructed of seamless
or welded steel. Coil bundles shall be totally removable and arranged to
drain completely. Tubes shall be seamless copper, plain, integrally finned
with smooth bore or integrally finned with enhanced bore. Each tube shall
be individually replaceable, except for the coaxial tubes. Tube baffles
shall be properly spaced to provide adequate tube support and cross flow.
Performance shall be based on water velocities not less than 0.91 m/s 3 fps
nor more than 3.7 m/s 12 fps and a fouling factor of [0.000044 m2(degrees
C)/W (0.00025 h(ft2)(degrees F)/Btu)] [0.000088 m2(degrees C)/W (0.0005
h(ft2)(degrees F)/Btu)] [0.00025 h(ft2)(degrees F)/Btu)] [0.0005
h(ft2)(degrees F)/Btu]. Water-cooled condensers may be used for
refrigerant storage in lieu of a separate liquid receiver, if the condenser
storage capacity is 5 percent in excess of the fully charged system for
single packaged systems.
2.6.13
Heat Recovery Condenser Coil
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NOTE: The designer will conduct feasibility studies
to determine if a heat recovery condenser is an
economical addition to the system. Heat recovery
condensers generally come in two sizes. The smaller
of the two is generally sized to reject the
superheat to the domestic water. The larger is
sized to reject the same amount of heat as the
standard condenser. The drawings will indicate the
heat rejection capacity of the heat recovery
condenser and the temperatures of the water to which
it must reject the heat.
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Condenser shall be of the shell-and-coil or shell-and-tube type design and
shall not be a part of the standard condenser. Condenser shall be provided
and installed by the chiller manufacturer. Condenser's refrigerant side
shall be designed and factory pressure tested to comply with ASHRAE 15.
Condenser's water side shall be designed and factory pressure tested for
not less than [1,000] [1,700] kPa [150] [250] psi. Condenser shall have
performance characteristics as indicated on the drawings. Condenser shell
shall be constructed of seamless or welded steel. Coil bundles shall be
totally removable and arranged to drain completely. Tubes shall be
seamless copper, plain, integrally finned with smooth bore or integrally
finned with enhanced bore. Each tube shall be individually replaceable,
except for the coaxial tubes. Tube baffles shall be properly spaced to
provide adequate tube support and cross flow. Performance shall be based
on water velocities not less than 0.91 m/s 3 fps nor more than 3.7 m/s 12
fps and a fouling factor of[0.00025] [0.0005].
2.6.14
Receivers
Liquid receivers not already specified herein as an integral
factory-mounted part of a package, shall be designed, fitted, and rated in
accordance with the recommendations of ARI 495, except as modified herein.
Receiver shall bear a stamp certifying compliance with ASME BPVC SEC VIII D1
and shall meet the requirements of ASHRAE 15. Inner surfaces shall be
thoroughly cleaned by sandblasting or other approved means. Each receiver
SECTION 15620A
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