2.11.7
Heat Recovery Devices
2.11.7.1
Hot Air Reclaim
Unit shall be a heat recovery, factory-fabricated, draw-through, central
station type air conditioner in accordance with Section 15895 AIR SUPPLY,
DISTRIBUTION, VENTILATION, AND EXHAUST SYSTEM.
2.11.7.2
Hot Water Reclaim
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NOTE: Indicate the size of the exchanger either as
a percent of the total rated condenser load or as a
percent of the superheated portion of the total
rated condenser load. The refrigerant compressor
head pressure control and the circulating pump can
be deleted if inapplicable.
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Unit shall be a double-wall, tube-within-tube heat exchanger type, complete
with thermostatic control. Unit shall be constructed and refrigerant
pressure/temperature rated in accordance with ASHRAE 15. Heat exchanger
coil shall consist of an external refrigerant containing carbon steel tube
and an internal, double-wall-in-metallic contact, convoluted, potable water
containing copper tube. Cabinet shall be fabricated of zinc-protected
steel and be internally insulated in coil space. The recovery device shall
be provided with a refrigerant compressor head pressure control and a
interlocked, potable water circulating pump. Pump and motor assembly shall
be close-coupled, manufacturer's standard type with indicated head and
capacity characteristics, and with brass, bronze, copper or stainless steel
wetted parts. Pump shall be mounted [remotely] [integral] to the exchanger
and be rated for [115] [208] [230] volt ac power supply.
2.11.8
Gaskets
Gaskets shall conform to ASTM F 104 - classification for compressed sheet
with nitrile binder and acrylic fibers for maximum 370 degrees C 700
degrees F service.
2.11.9
Bolts and Nuts
Bolts and nuts shall be in accordance with ASTM A 307. The bolt head shall
be marked to identify the manufacturer and the standard with which the bolt
complies in accordance with ASTM A 307.
2.11.10
Bird Screen
Screen shall be 1.6 mm 0.063 inch diameter aluminum wire or 0.79 mm 0.031
inch diameter stainless steel wire.
2.12
FABRICATION
2.12.1
Factory Coating
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NOTE: For equipment to be installed outdoors,
adequate protection will be specified.
Manufacturers must submit evidence that unit
specimen have passed the specified salt spray fog
SECTION 15700A
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