mounted on a single base and provision shall be made for catching the drip
from the stuffing boxes. Accessories shall consist of a compound gauge, a
pressure gauge inlet strainer, thermometer, water level gauge with
stopcocks, adjustable vacuum relief valve, air discharge and condensate
discharge check valves, and companion flanges for all flanged connections.
The discharge line from each pump shall be provided with a nonslam check
valve and a globe valve. Each motor shall have a dripproof-type enclosure.
Fully automatic controls shall be provided for each pump motor. Controls
shall consist of a float in the receiving tank, a float switch, an
adjustable vacuum switch, an automatic, magnetic, across-the-line type
starter with general-purpose enclosure, and a three-position selector
switch in the cover. The selector switch shall provide for ["Automatic,"
"Float," "Vacuum,"] ["Automatic," "Float,"] and "Continuous" operation of
the pump.
2.5
COLD WATER CONNECTIONS
Connections shall be provided which includes consecutively in line a
strainer, backflow prevention device, and water pressure regulator in that
order in the direction of the flow. The backflow prevention device shall
be provided as indicated and in compliance with Section 15400A PLUMBING,
GENERAL PURPOSE. Cold water fill connections shall be made to the water
supply system as indicated. Necessary pipe, fittings, and valves required
for water connections between the boiler and cold water main shall be
provided as shown. The pressure regulating valve shall be of a type that
will not stick or allow pressure to build up on the low side. The valve
shall be set to maintain a terminal pressure of approximately,lately 35 kPa
5 psi in excess of the static head on the system and shall operate within a
15 kPa 2 psi tolerance regardless of cold water supply piping pressure and
without objectionable noise under any condition of operation.
2.6
RADIATORS AND CONVECTORS
Radiators, convectors and associated equipment shall be in accordance with
Section [15556A FORCED HOT WATER HEATING SYSTEMS USING WATER AND STEAM HEAT
EXCHANGERS] [15562A HEATING AND UTILITIES SYSTEMS, CENTRAL STEAM].
2.7
RADIANT FLOOR HEATING SYSTEMS
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NOTE: Delete this paragraph if radiant floor
heating systems are not required.
Although this specification deals with heating water
produced by boilers, other sources of heat such as
solar, domestic water heaters, waste heat, or heat
pumps may also be used for radiant floor heating.
The radiant floor heating system should be designed
in accordance with the latest edition of the ASHRAE
Systems and Equipment Handbook, HYI-400, and the
Radiant Panel Association's (RPA) Standard
Guidelines for the Design and Installation of
Residential Radiant Panel Heating Systems.
All pipe layouts, zones, pipe sizes, and pump sizes
should be clearly shown on the drawings. The
designer should provide a cross sectional detail of
the integrated floor and piping system that clearly
SECTION 15569A
Page 35
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