22
Aermec cod. 14_09.4086981_04
NRL 800-1800 60Hz
EN
1 NRL 800
2 NRL 900
3 NRL 1000
4 NRL 1250
5 NRL 1400
6 NRL 1500
7 NRL 1650
8 NRL 1800
The heating capacity that can be obtained from the
desuperheater is found by multiplying the nominal
value (Pd), by a relative co-efficient (Cd).
The following diagrams allow to obtain corrective
co-efficients to use for chillers in their various versions;
external air temperature, to which reference is made,
is shown in correspondence to each curve.
In heat pump models the desuperheater must be
shut-off in heat pump mode, or the warranty will be
come void..
PRESSURE DROPS
The NRL models with desuperheater have 2 desu-
perheaters for all sizes (positioned in parallel).
NOTE
Desuperheater features and pressure drop curves are
shown below.
For temperature values of produced water, different
from 50°C, multiply the result by the corrective factor.
Nominal value referring to:
Air temperature
35°C/95°F
Water at the desuperheater
45/50°C 113/122 °F
∆t
5°C/41°F
Units with Desuperheater (D) do not envision the
following versions:
YD
XD (only for temperature under 4°C/39.2°F)
45°C
40°C
35°C
30°C
25°C
0.00
35
40
45
50
55
60
65
0.50
1.00
1.50
2.00
2.50
3.00
20°C 68°F
95
100
105
110
115
120
125
130
135
140
145
149
113°F
104°F
95°F
86°F
77°F
Temperature of water produced at the desuperheater ∆t 5°C 41 °F
Corr
ectiv
e c
o-e
fficien
ts Cd
DESUPERHEATER CORRECTIVE COEFFICIENTS
13. DESUPERHEATER
DESUPERHEATER PRESSURE DROP
Average water temperature°C
30
40
50
60
70
Average water temperature °F
86
104
122
140
158
Multiplicative co-efficients
1.04
1.02
1
0.98
0.96
0
5
10
15
20
25
30
35
40
45
50
0
5000
10000
15000
20000
25000
30000
35000
40000
45000
50000
NRL 800
NRL 900
NRL 1000
NRL 1250
NRL 1400
NRL 1500
NRL 1650
NRL 1800
DA (solo freddo)
1
2
3
4
5
6
7
8
0
1
2
3
4
5
6
7
0
200
220
100
150
50
1
2
3
4
5
7
6
8
psi
kPa
l/h
gmp
Pr
essur
e dr
op
Water flow rate
Summary of Contents for NRL 080
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