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WATER CONNECTIONS
7
7.1 EVAPORATOR
The connections schemes relating to evaporator are featured in the paragraph 7.4 HYDRAULIC VERSIONS
The connection tubes have to be supported adequately in order that their weight does not damage the plant.
It is necessary that the water flow rate to the unit is compatible with the evaporator one. It is also necessary that the water
flow rate is kept uniform while the unit is running: it is suggested to use always a pump system dedicated to the unit and
independent from the remaining part of the plant.
Before stalling units with temperature around 0°C please evacuate the exchanger with compressed air in order to avoid
breakings due to ice.
If the unit is installed in order to replace another, the entire hydraulic system must be emptied and cleaned before the
new unit is installed. Regular tests and proper chemical treatment of water are recommended before starting up the
new unit.
In the event that glycol is added to the hydraulic system as anti-freeze protection, pay attention to the fact that intake
pressure will be lower, the unit's performance wil be lower and water pressure drops will be greater. All unit-
protection methods, such as anti-freeze, and low-pressure protection will need to be reset. Before insulating water
piping, check that there are no leaks.
Evaporator nominal pressure (PN) = 16 bar.
CAUTION: Install a mechanical water filter at the water inlet of each heat exchanger as featured in the par. 7.4
HYDRAULIC VERSIONS. Failure to install the filter allows access of solid particles and / or welding slag inside the heat
exchanger. We recommend the installation of a filter having a filtering net with holes not exceeding 0.5 mm in diameter.
Trane cannot be held responsible for any damage to heat exchangers due to the lack of good quality water filters.
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