of [copper tube and aluminum fins] [copper tube and copper fins] [aluminum
tube and aluminum fins]. Fins shall be hydraulically or mechanically
bonded to tubes and installed in a metal casing. Coils shall be circuited
and sized for a minimum of 3 degrees C 5 degrees F subcooling and full
pumpdown capacity. [Provide a coating as specified in the paragraph
entitled "Coatings for Finned Tube Coils." Coils to be coated shall be
part of the manufacturer's standard product for the capacities and ratings
indicated and specified. Fins shall be the plate fin type.]
2.4.4
Fans
For V-belt drive fans, provide adjustable sheave. Fans shall be statically
and dynamically balanced. Provide fans with vibration isolation devices to
minimize vibration transmission.
2.4.5
Electric Motors and Starters
Provide polyphase induction motors conforming to NEMA MG 1. Motor bearings
shall be permanently lubricated. Provide across-the-line magnetic motor
starters conforming with NEMA ICS 1 and NEMA ICS 2. Provide phase failure
over voltage and low voltage protection.
2.4.6
Condenser Controls
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NOTE: Insert winter design temperature that the
equipment will be subjected to.
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Provide start-up and head pressure controls to allow for system operation
at all ambient temperatures down to [_____] degrees C degrees F.
2.5
WATER-COOLED CONDENSERS, REMOTE-TYPE
Provide shell-and-coil or shell-and-tube type constructed, tested, and
rated in accordance with ARI 450. Refrigerant side design pressure shall
comply with ASHRAE 15. Water side design pressure shall be not less than
1034 kPa (gage) 150 psig.
2.5.1
Shell-and-Coil Condensers
Fabricate with seamless or welded steel shell and welded head. Water shall
flow through the coil which shall be nonferrous metal, plain or integral
finned, and arranged to drain completely. Coil joints shall be brazed or
silver soldered. Entire bundle shall be removable.
2.5.2
Shell-and-Tube Condensers
Fabricate with seamless or welded steel shell, steel tube sheets, and
cast-iron or steel water boxes. Tubes shall be nonferrous metal, plain or
integral finned, and shall be expanded full diameter into reamed and
grooved holes, silver soldered or brazed. Provide intermediate tube
supports for lengths of straight tubing between supports every 0.91 meter 3
feet for copper tubes, and every 1.22 meters 4 feetfor brass tubes. Tubes
shall fit in the support to prevent chafing due to vibration or pulsations.
2.5.3
Accessories
Provide condensers with the following accessories:
SECTION 15601N
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