and vacuum alarms; medical gas low voltage wiring; laboratory gas
and vacuum; laboratory gas and vacuum alarms; fuel gas; storm
water; and oral evacuation systems.
18.2
Riser diagrams may be shown flat, or in isometric projection. Show
story heights, size of all horizontal and vertical piping, fixture
numbers being served, and means of connection between fixtures and
the stacks and mains. Show each system complete and continuous.
19.
LAUNDRY
All laundry equipment, including water treatment and heaters, are
provided by the Medical Center. Provide utilities to serve the laundry
equipment and toilet areas. The water supply for laundry use shall be
provide with a meter.
20.
WATER SOFTENING SYSTEM
20.1
Softeners: Design vertical, pressure type, sodium cycle water
softeners to comply with the following and Master Specification
15455. Regeneration shall occur no more than once per day. Provide
bypass.
A.
When Required:
1.
Entire Medical Center: Provide softening equipment when
total hardness exceeds 170 mg/L (ppm) as CaCO3. Blend
equipment effluent to a hardness of approximately 50 mg/L.
2.
Steam Cooking Equipment and Boiler Feed-water Make-up:
Provide softening equipment when total hardness exceeds 5
mg/L.
B.
Medical Center Use: Design duplex softeners, each furnishing
50 percent of the maximum flow rate and exchange capacity.
Provide a hardwater bypass.
C.
Steam Cooking Equipment: Design simplex softener and a hard
water bypass. Locate regeneration alarm in office of
dietitian.
D.
Boiler Use: Design duplex softeners, each furnishing 100
percent of the maximum flow rate at an exchange capacity
required for peak boiler feed-water make-up. Locate
regeneration alarm in office of boiler plant operator.
20.2
Salt Storage:
A.
When softened water is needed for the entire medical center,
design outdoor storage facilities. Ensure total capacity is
large enough to accommodate 2 to 3 months supply of salt.
Locate the salt storage facility adjacent to a service road,
and preferably adjacent to the softener room.
B.
When soft water is required for dietetic or boiler use,
designate interior floor space for 180 kg (400 pounds) of salt
near softeners.
21.
DEALKALIZING EQUIPMENT
As water analysis dictates, design a single chloride-anion pressure-type
water dealkalizing task for boiler feed-water make-up to follow water
20
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