Marley Primus P11, Руководство пользователя

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4. With no heat load on the circulating water, icing cannot be controlled
effectively by air control during freezing weather.
Towers must not be
operated with reduced water rate and/or no heat load during
freezing weather.
If the circulating water system cannot be shut
down, water returning from the process should be made to bypass the
tower. If a bypass is used, all water must be bypassed without
modulation. If the water bypass is directly into the tower's cold water
basin, its design must be approved by Marley Engineers.
Intermittent Wintertime Operation:
If periods of shutdown (nights, weekends, etc.) occur during freezing
weather, measures must be taken to prevent the water in the cold water
basin—and all exposed pipework—from freezing. Several methods are
used to combat this, including automatic basin heater systems available
from Marley.
Unless some means of freeze prevention is incorporated into your
system, the tower basin and exposed pipework should be drained at
the beginning of each wintertime shutdown period.
If tower basin is drained, verify that all basin heaters have been shut
off either by automatic cutoff or disconnect switch.
It is recommended that you discuss your freeze prevention options with
your local Marley sales representative.
Operation
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Caution
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Warning