controls furnished. When motors and equipment furnished are larger than
sizes indicated, the cost of providing additional electrical service and
related work shall be included under this section.
2.2.2
Electrical Work
Provide in accordance with Section 16402 INTERIOR DISTRIBUTION SYSTEM.
[Provide control wiring in accordance with Section 15901N SPACE TEMPERATURE
CONTROL SYSTEMS.] [Provide control wiring in accordance with Section 15910N
DIRECT DIGITAL CONTROL SYSTEMS.] [Provide control wiring in this section,
in accordance with NFPA 70.]
2.3
ABOVEGROUND PIPING SYSTEMS
Provide the following pipe and fittings. Provide dielectric fittings,
unions, or flanges between steel piping and copper tubing for all piping
sizes; except that copper alloy valves and strainers may be used without
dielectric fittings, unions, or flanges. Water piping sizes 100 mm 4 inches
and smaller shall be copper tubing. [Water piping sizes larger than 100 mm
4 inches shall be copper tubing or steel piping.]
2.3.1
Copper Tubing Systems
Provide copper tubing for the following systems.
a.
Copper condensate drain piping from drain pans.
b.
Copper refrigerant tubing.
[c.
Condenser water piping aboveground or within mechanical space.]
[d.
Chilled/Hot Water Piping.]
2.3.1.1
Copper Condensate Drain Piping
Provide copper tubing in accordance with ASTM B 88M ASTM B 88, Type L or M
for piping sizes 25 mm one inch and smaller. Provide ASTM B 306 copper
tubing and ANSI B16.23 solder joint fittings for piping sizes larger than
25 mm one inch. In lieu of copper tubing, 32 mm 1.25 inch Schedule 40
polyvinyl chloride (PVC) plastic pipe, fittings, and solvent cement may be
provided.
2.3.1.2
Copper Refrigerant Tubing
Provide ASTM B 280, cleaned, dehydrated, and sealed. Provide ASME B16.22
solder joint refrigerant fittings and adapters. Provide silver brazing
alloy solder and silver brazing alloy flux. During brazing operations
bleed a small amount of dry oil-free nitrogen continuously through the
refrigerant tubing. Provide ASME B16.26flared fittings.
2.3.1.3
Soldered Joint Copper Tubing Systems
For condenser water piping and chilled/hot water piping, provide ASTM B 88M
ASTM B 88, Type L or M for aboveground piping, Type K for buried piping,
with ANSI B16.18 or ASME B16.22 solder joint fittings, unions, and flanges;
provide adapters as required. Provide ASTM B 42 copper pipe nipples with
threaded end connections. Provide ASTM B 32, 95-5 tin-antimony (Sn-Pb)
solder.
SECTION 15741N
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