Western Electric 6-B, Инструкция по эксплуатации

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tom, opposite ends.
I t
i s provided at one end with a pet-cock which should be
open whenever the system is being filled so that any air that may accumulate
in the radiator is expelled.
Due to the fact that an increase in the temperature of water will increase
the volume, assuming a constant pressure, it is necessary to provide for the
expansion of the water in th e cooling system. A galvanized iron tank w ith a
capacity of 10 gallons i s installed in an elevated position to allow for the
expansion. A vent which is open to the atmosphere relieves the pressu re within
the tank whenever expansion takes place. The tank is also equi pped with a glass
water gauge, and the water circulating system should be filled until the gauge
indicates that the tank is one-quarter to one-half full.
A typi cal diagram of a water circulating system utilizing the equi pment
described in the precedi ng paragraphs is included in these instructions. Distilled
water, which has less conductivity than other available water supply, should
be used i n the circulating system. This is i mportant, since the power amplifier
vacuum tube in the Ampl i fier Unit is operated at a potential of 4,000 volts above
ground, and it is desirable to keep the leakage current in the water column
through the hose connection as low as possible. The leakage current i s indicated
by meter M lB marked "LEAKAGE CURRENT." Full i nstructions on the
operation of the water circulating system, the setting of valves, etc., are given
in the diagram on page 50.
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