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EXERCISE :
Consider
the system below. It is a tower with an indirect cooling system.
Assuming
that filling must be performed at 20°C, the pump is not running
(if it was running without water in the system, it would soon
destroy itself!).
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With
water at 20°C, and the mains pressure being, for example,
5 bar, should the system be filled to 0.5 bar, 1 bar, 3
bar or 5 bar? What would the gauge P1 read after filling?
?
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With the system full, what will be the pressure P2 measured at the lowest
point in the system, next to the drain valve?
?
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What
is the use of the device 1?
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(Solution
: Refrepair Manual pages 558 to 574)
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