be oil tight. Shaft extensions shall be provided with seals to retain oil
and exclude all dust.]
2.6.10
Liquid Cooler (Evaporator)
**************************************************************************
NOTE: The standard performance fouling factor per
ARI is 0.0001 h(ft2)(degrees F)/Btu.
**************************************************************************
Cooler shall be of the shell-and-coil or shell-and-tube type design.
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. Cooler 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. Tubes shall be installed into carbon mild steel tube sheets
by rolling. Tube baffles shall be properly spaced to provide adequate tube
support and cross flow. Performance shall be based on a water velocity not
less than 0.91 m/s 3 fps nor more than 3.7 m/s 12 fps and a fouling factor
of [0.000018 m2(degrees C)/W (0.0001 h(ft2)(degrees F)/Btu)] [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)] [0.0001 h(ft2)(degrees F)/Btu] [0.00025
h(ft2)(degrees F)/Btu] [0.0005 h(ft2)(degrees F)/Btu].
2.6.11
Air-Cooled Condenser Coil
**************************************************************************
NOTE: Standard coil construction is copper tubes
with aluminum fins. For excessively corrosive
atmospheres, either copper tubes with copper fins or
aluminum tubes with aluminum fins should be
considered. For additional corrosion protection,
specify the manufacturer's standard epoxy or vinyl
coating.
**************************************************************************
Condenser coil shall be of the extended-surface fin-and-tube type and shall
be constructed of seamless [copper] [or] [aluminum] tubes with compatible
[copper] [or] [aluminum] fins. Fins shall be soldered or mechanically
bonded to the 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. Coil shall be factory leak and pressure tested
after assembly in accordance with ASHRAE 15. [Coil shall be entirely
coated with the manufacturer's standard epoxy or vinyl coating.]
2.6.12
Water-Cooled Condenser Coil
**************************************************************************
NOTE: The standard performance fouling factor per
ARI is 0.00025 h(ft2)(degrees F)/Btu for condenser.
**************************************************************************
Condenser shall be of the shell-and-coil or shell-and-tube type design.
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]
SECTION 15620A
Page 34
Previous Page
