7.6
Size the hot water supply and return lines by the heat loss method
as outlined in the ASHRAE GUIDE AND DATA BOOK, not to exceed 6
degrees C (10 degrees F) heat loss. Dead ends shall be limited to
6000 mm (20 feet).
7.7
Provide combination shut-off and balancing valves in the hot water
return circulating lines.
8.
DRINKING WATER EQUIPMENT
Provide wall hung, self-contained, electric, wheelchair accessible,
water coolers. Provide hi-low units in areas where only one unit is
provided.
9.
SANITARY AND STORM DRAINAGE SYSTEMS
9.1
See Article, PLUMBING FIXTURE SCHEDULES, for fixture units and
waste/vent minimum fixture branch sizes.
9.2
Provide an adequate number of sanitary and storm connections from
a building. Design each sanitary sewer connection not to exceed
300 mm (12 inches) diameter, and provide at least two connections
from each building [exception: one sewer is adequate for a
building that can be served by a 150 mm (6 inch) or less diameter
pipe]. Maximum allowable size for storm drain is 375 mm (15
inches). Base storm frequency on local code.
9.3
Kitchen waste shall be provided with a grease removal system.
9.4
Do not drain outside building sub-soil drain tile to an interior
sump pump. If a pump is required, locate it outside of the
building.
9.5
Provide chemical-resistant pipe for all waste and vent piping
serving laboratory fixtures and photographic developing equipment.
Chemical drainage shall pass through an acid neutralizing tank
before connecting to the building sanitary drainage system.
Install chemical-resistant vent pipe independently through the
roof.
9.6
Where reduced pressure backflow preventers are required (Master
Specification 15400), provide positive drainage.
10.
SILVER RECOVERY SYSTEM (IF REQUIRED)
10.1
Each automatic film processor, except those serving dental x-rays,
shall be connected to a central silver recovery system. An
exception is that an isolated processor may be served by an
individual recovery unit.
10.2
Silver recovery equipment is not in the contract and will be
furnished by the medical center. This equipment includes holding
tank and silver recovery tanks with platforms, rectifier units
with shelf, storage cabinet, and work table. This equipment will
be housed in one room. Coordinate your work with medical center.
10.3
Provide 40 mm (1-1/2 inch) pipe stub [150 mm (6 inches) above
floor] at each automatic film processor to receive silver
solution. Where possible, combine the silver solution piping into
a single pipe for transport to holding tank in silver recovery
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