32
Flushing tap water system (continued)
4. Open valve on cooling water supply line.
5. Run HX normally for 10-15 minutes. The condenser flow is
now reversed. This reverse flow will tend to loosen any de-
posits. Cooling performance may be less, and the water
regulating valve may make some vibration noise.
6. Turn HX off.
7. Close valve on cooling water supply.
8. Restore hoses to original configuration.
9. Open valve on cooling water supply line.
Flushing with unit turned off
In either the closed facility or tap water system, it is possible
to flush the condenser even if it not possible or convenient to
turn the HX on. This method may be used, for example, if the
HX is having other service or maintenance performed at the
same time; or if electricity is not available.
It is necessary to manually open the regulating valve to allow
flow through the condenser. There are two techniques.
A. The valve may be opened by prying up the spring follower
disc using two flat-blade screwdrivers, one on each side. The
valve will be open as long as the spring is compressed. This
is practical for a momentary opening of the valve, as it does
not disturb the adjustment.
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