MULTIFUNCTIONAL UNITS RLC – Installation and maintenance manual
MUMRLCHEAT_REV01_1012_UK
Pag. 15 di 31
8
Water Connections
8.1
Preamble
The connection tubes have to be supported adequately in order that their weight does not damage the plant.
The above-mentioned installation indications represent necessary conditions for the guarantee to be valid.
Thermocold is at your disposal to examine any different requirements, which have to be approved before starting up the chiller.
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.
8.1.1
Calculation of minimum water content and flow rates
To operate properly, the unit needs a water content sufficient to avoid constant changes of the cycle or too frequent on-of of the
compressors. See the chapter on the thecnical data. The declared content can be reduced by the amount contained in the distribution
piping system only for the air conditioning system. Undersized tanks reduce the progect useful life of the unit.
8.2
Equipment for the water circuit regulation
Centrifugal motor pump block or packaged circulator.
Assures the discharge and the prevalence necessary to supply shell&tubes or plate heat exchanger, the tank and the utility.
Automatic filling unit
Assures the water pressure in the plant is maintained at least 1.5 bar, automatically resetting it when necessary.
Safety valve
Takes care of opening the plant in atmosphere if the pressure exceeds the value of 6 bar.
Expansion tank
Takes care of compensating small water hammering and variations of volume for different temperatures.
Check valves
Take care of intercepting the pump for possible maintenance.
Check valves
Take care of guarantee the waterflow direction and to avoid the heat propagation downstream of the plant when the correspondent pump
is switched off.
