Harris Maxiva ULX, Техническое руководство

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10/6/10 888-2629-200 2-9
WARNING: Disconnect primary power prior to servicing.
Section 2 Installation
Maxiva ULX COFDM Series
NOTE:
If any of these restrictions cannot be met, a site-specific modification may be
required. Contact your Harris representative for modifications.
All fluid piping practices should be in accordance with local codes. Standard
installations will use heavy duty hose for connecting the transmitter to the heat
exchanger and pump module but copper field piping using type M, hard drawn copper
pipe and sweat joints made with soft silver solder is an acceptable alternative. Other
piping materials such as steel, galvanized steel, cast iron, brass or plastic should not be
used.
NOTE:
Do not use any type of galvanic piping or components in the Maxiva cooling system.
Whenever components made from different materials are piped in a system, use
dielectric isolation of the materials to help prevent galvanic corrosion. All threaded pipe
connections must be sealed and any flanged connections gasketed; use a sealant or
Teflon tape on threaded connections or the glycol/water solution will leak.
Correct sizing of pipe or hose is critical to assure smooth operation and keep operating
costs to a minimum. Calculation of total system friction pressure loss determines
optimum pipeline size. For closed-loop systems, do not include the static head pressure
of the system piping, as equal and opposite forces cancel out upward and downward
flow. All elbows, tees, valves and system component pressure drops must be considered
when determining pipe/hose size. Pump selection at rated flow is based on 150 feet total
length. Refer to installation drawings for recommended pipe and hose sizes.
Proper use of valves (gate type, ball type or globe type) is required to allow for isolation
of components (bypassing) in the event of maintenance to reduce closed circuit system
glycol/water loss. Bypassing of the transmitter cabinets is also desirable to avoid
contamination of the transmitter during initial coolant system flushing.
2.5.2 Calculation of Cooling System Capacities
Calculation of cooling system capacities is important in order to know how much
coolant and distilled water is needed for initial installation and future maintenance. For
the initial installation, have enough distilled water on hand for the initial fill up with
water, the initial system cleaning, two to four system flushes (to remove the cleaning
solution) and the initial fill up with a 50% glycol/water solution. Have enough glycol on
hand to perform the initial fill up, and enough Glycol and distilled water for a complete
system refill in case of a catastrophic leak where all of the system coolant is lost.