selected for the plate and frames shall be appropriate for the service
required. High and low temperature and pressure relief connections shall
be located in accordance with the manufacturer's standard practice. Water
pressure loss through clean plates shall be as recommended by the engine
manufacturer. One or more pressure relief valves shall be provided for
each heat exchanger in accordance with ASME BPVC SEC VIII D1. A drain
connection with a 19 mm 3/4 inch hose bib connection shall be installed at
the lowest point in the system near the heat exchanger.]
2.5.2.3
[Cooling Tower
**************************************************************************
NOTE: The maximum outdoor design temperature,
coolant temperature, and availability of water are
critical to the proper selection of the appropriate
cooling tower. Applicable ASHRAE guides should be
consulted for application guidance.
**************************************************************************
The cooling tower shall be sized to limit the maximum allowable temperature
rise in the coolant across the engine to that recommended by the engine
manufacturer. The contractor shall be responsible for the proper selection
of system components based on the site conditions and the [diesel] [natural
gas fueled] engine pump drive[s] used. Internal and external materials
shall be appropriate for the heat used. Cooling towers shall be used in
conjunction with a liquid-to-liquid heat exchanger to keep the engine
cooling in a closed loop with conditioned coolant. The cooling tower shall
be furnished as a complete operating system with a liquid-to-liquid heat
exchanger, a surge tank, an auxiliary water pump, necessary filters in the
water return lines, and interconnecting piping and isolation valves as
required for maintenance and operation.]
2.5.2.4
[Submerged Pipe
**************************************************************************
NOTE: Protection for the submerged pipe or coil
should be considered. The pipe or coil should be
kept out of mud or silt and away from the bottom of
the cooling pond to ensure maximum efficiency.
**************************************************************************
The pipe or coil shall be of sufficient length to cool the engine at the
specified raw water temperature. The piping materials shall be as
specified in paragraph PIPE. The pipe installation shall be as specified
in paragraph PIPING INSTALLATION. The pipe from the return bend shall
always slope up to prevent air locks in the system. A drain plug shall be
furnished at the lowest point of the system. The system shall be connected
so that the jacket water flows from the engine to the cooling coils and
then to the expansion tank before returning to the jacket water pump inlet.]
2.5.3
Thermostatic Control Valve
A modulating type, thermostatic control valve shall be provided in the
coolant system to maintain the engine coolant temperature in the range
submitted in paragraph SUBMITTALS.
2.5.4
Ductwork
The ductwork shall be as specified in [Section [15895 AIR SUPPLY,
SECTION 15133A
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