5.5
Coordinate electrical supply to electronic faucets and flush
valves.
6.
DOMESTIC WATER BOOSTER SYSTEM
6.1
Use a three pump system. Size one pump for approximately one-third
of the total water demand. Each of the other pumps shall be sized
for approximately two-thirds of the total demand. The smaller will
operate until water demand exceeds the pump's capacity, at which
point it will stop and one of the other larger pumps shall start.
When the demand exceeds the capacity of this larger pump, the
smaller pump will restart and both pumps will operate together.
The other large pump will be a standby and alternate with the
first large pump. Provide a pneumatic tank and "NO-FLOW" shut-down
controls.
6.2
Provide emergency power to each pump.
7.
DOMESTIC HOT WATER SYSTEMS
7.1
Provide duplex shell and steam coil central water heaters with the
capacity of generating the flow demand at 60 degrees C (140
degrees F) with each heater sized to supply 50% of demand.
However, the heater discharge temperature shall be set at 54
degrees C (130 degrees F). Provide a water temperature alarm
system on heater discharge, or where water enters the piping
system. Temperature limit stop of Type T/P combination temperature
and pressure balancing valve shall be set at 40 degrees C (105
degrees F). Dietetic facilities shall be provided the flow demand
at 60 degrees C (140 degree F). Use recirculating system.
7.2
Size each heater based on modified Hunter's Curve (Hot and Cold
Water Section, ASHRAE GUIDE AND DATA BOOK) and fixture unit count
indicated in Article, PLUMBING FIXTURE SCHEDULES. Special
equipment demands such as dishwashers must be added to the water
heater load.
7.3
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 5
degrees C (10 degrees F) heat loss. Dead ends shall be limited to
6 m (20 feet).
7.4
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.
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
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