AERMEC NRA Series User Manual

25
When operating with the total heat
recovery function, machine performan-
ce depends on the temperature of the
hot water produced, not on that of
external air; to calculate the absorbed
electrical and heat recovery power
values, multiply the values (Pa, Pr) spe-
cified at the bottom of the page by the
relevant correction factors (Ca, Cr)
derived from the diagrams below. The
temperature of the relative hot water
is given for each curve (a difference
of 5°C between total heat recovery
unit input and output is presumed).
Calculate the cooling power (Pf) by
measuring the difference between
heat recovery power (Pr) and power
absorbed (Pa).
NOTA
In heat pumps total recovery is only available
for the “OO versions without hydronic kit”
The heating capacity available to the
total heat recovery is in rated condi-
tions:
Air temperature 35 °C
Water produced 50 °C
∆t 5 °C
13.1 PRESSURE DROPS
All NRA models with total recovery are
equipped with ONE recoveries. Heat
recovery unit specifications and load
loss curves are given below. The pres-
sure drops you see in the table do not
include the filter drop, whose curve is
indicated.
NOTE
The parallel water connections is to be
made by the installer
The pressure drops in the charts
above refer to an average water tem-
perature of 50 °C. The following table
shows the corrections to apply to the
pressure drops with a variation in ave-
rage water temperature.
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13 TOTAL RECOVERY
(Cr)
(Ca)
LEGENDA
Cr Coefficiente correttivo potenza recuperata
Ca Coefficiente correttivo potenza assorbita
Temperatura dell’acqua refrigerata prodotta (∆t=5°C)
Taglie 0800 0900 1000 1250 1400 1500 1650 1800
PTR
kW
290 324 357 435 485 534 591 654
Potenza
assorbita
kW
73 81 89 109 121 133 157 174
Portata
acqua
m
3
/h
50 55.7 61.4 74.8 83.4 92.0 101 112
Perdita di
carico
kPa
79910109.61318
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Water flow rate m3/h
kPa
Average water temperature °C 30 40 50
Multiplicative coefficient 1.0 4 1.0 2 1
Values different from the nominal value

AERMEC NRA Series Specifications

General

Brand	AERMEC
Model	NRA Series
Category	Air Compressor
Language	English