Hydraulic Connections - Trane CGCN Installation Operation & Maintenance

Hydraulic connections

The connecting pipes should be adequately supported so as not to burden with their weight on the system.
The installation instructions included in the statements to follow, represent a necessary condition for the validity
of the warranty. Trane is at your disposal to examine any differing needs, which still must be approved prior to
the operation of the unit. The water flow of the group must be compatible with that of the evaporator. It is also
necessary maintain a constant water flow during operation
Dimensioning of the minimum water content and flow
To function properly, the unit needs a water content sufficient to avoid continuous changes of the cycle or
shutdown and restart the compressor too frequently (refer to the contents in this manual). Refer to the
chapter on data general. The content can be reduced by the quantity declared contained in the piping
distribution system as regards the only air conditioning system. Accumulations undersized reduce the
useful life of the unit design.
For a correct operation of the unit, it is absolutely necessary to ensure a constant flow rate to the unit: especially
in case of lack of accumulations is recommended to mount between the delivery branch and return pump
valve a by-pass or automatic or manual appropriately set in phase the commissioning of the unit.
WARNING! it is recommended to mount on the side water overflow valves to prevent dangerous overpressure
and / or water hammer.
Apparatus for adjusting the water circuit Or mono-block centrifugal electric pump
Ensures the scope and prevalence needed to power the evaporator shell and tube or plate, storage and utilities.
Automatic filling unit
Ensures the maintenance of water pressure in the system at least 1.5 bar automatically topping.
Safety valve
Undertakes to open atmosphere in the system if the pressure exceeds 6 bar.
Expansion vessel
Compensates for small water hammer and volume changes for different temperatures.
Shut-off valves
Provide to intercept the pump or other components for maintenance.
Non-return valves
Take steps to ensure the direction of water flow and also have the function of preventing the propagation of heat
downstream of the plant when its pump is switched off.