AERMEC NRL 0280 FE, Руководство по установке и обслуживанию

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EN
The NRL Free-cooling series appliances are water
chillers equipped with an external air cooling capacity
recovery system called "free-cooling".
The water free-cooling system consists in integrating
and eventually completely replacing the cooling capaci-
ty delivered by the compressors through an additional
water coil that exploits the low temperature of the
external air to cool the system's return water.
Maximum reliability
The presence of several scroll compressors allows NRL
chillers various partialisations of the cooling capacity.
OPERATING MODE:
FREE-COOLING ONLY:
when the external temperature is sufficiently low to
allow water cooling inside the free-cooling coils at
the desired temperature. This is the most economical
mode of the unit with only the fans operating in speed
modulation.
MIXED FREE-C COMPRESSORS:
the compressors operate in integration with the free-
cooling when the cooling capacity recovered from the
external air is no longer sufficient for the power requi-
red by the system. The higher the cooling capacity
recovery with free-cooling the lower the integration is.
COMPRESSORS ONLY:
when the external air temperature is greater than the
return temperature of the system water.
Models:
1. NRL "F" free-cooling
The versions can be in different set-ups at the same
time in order to satisfy a wide range of plant enginee-
ring solutions:
1. "A" HIGH EFFICIENCY
2. "E" SILENCED HIGH EFFICIENCY
3. "D" WITH DESUPERHEATER
The units with desuperheater (D) are not available in
the versions:
1. YD
2. XD
1. DESCRIPTION AND CHOCE OF UNIT