One or more pressure relief valves shall be provided for each heat
exchanger in accordance with ASME BPVC SEC VIII D1. The aggregate
relieving capacity of the relief valves shall be not less than that
required by the above code. Discharge from the valves shall be installed
as indicated. The relief valves shall be installed on the heat exchanger
shell. A drain connection with 19 mm 3/4 inch hose bib shall be installed
at the lowest point in the system near the heat exchanger. Additional
drain connection with threaded cap or plug shall be installed wherever
required for thorough draining of the system.
2.5.3
Expansion Tank
**************************************************************************
NOTE: Delete this paragraph if a shell and U-tube
type heat exchanger is not needed.
**************************************************************************
The cooling system shall include an air expansion tank which will
accommodate the expanded water of the system generated within the normal
operating temperature range, limiting the pressure increase at all
components in the system to the maximum allowable pressure at those
components. The tank shall be suitable for operating temperature of 121
degrees C 250 degrees F and a working pressure of 0.86 MPa 125 psi. The
tank shall be constructed of welded steel, tested and stamped in accordance
with ASME BPVC SEC VIII D1 for the stated working pressure. A bladder type
tank shall not used. The tank shall be supported by steel legs or bases
for vertical or steel saddles for horizontal installation.
2.5.4
Thermostatic Control Valve
A modulating type, thermostatic control valve shall be provided in the
coolant system to maintain the coolant temperature range submitted in
paragraph SUBMITTALS.
2.5.5
Ductwork
Ductwork shall be as specified in Section 15895 AIR SUPPLY, DISTRIBUTION,
VENTILATION, AND EXHAUST SYSTEM except that a flexible connection shall be
used to connect the duct to the diesel engine radiator. Material for the
connection shall be wire-reinforced glass. The connection shall be
rendered as airtight as possible.
2.5.6
Temperature Sensors
Each engine shall be equipped with coolant temperature sensors.
Temperature sensors shall provide signals for pre-high and high indication
and alarms.
2.6
SOUND LIMITATIONS
**************************************************************************
NOTE: The designer must perform an analysis in
accordance with TM 5-805-4 NOISE AND VIBRATION
CONTROL and TM 5-805-9 POWER PLANT ACOUSTICS. The
designer must consider air intake, exhaust, and
diesel generator casing noise. The designer must
also coordinate with the architect for proper
material selections for the sound transmittance
characteristics of the mechanical equipment room and
SECTION 16263A
Page 44
Previous Page
