20
Aermec cod. 14.09 4086982_03
NRL 2000-3600 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
12.
TOTAL RECOVERY
In the case of functioning with total heat reco-
very, machine performance does not depend on
the external air temperature, but on that of the
hot water produced: the electric input power and
the recovery heating capacity are obtained by
multiplying the values (Pa, Pr) by the respective
corrective co-efficients (Ca, Cr), deductible from
the following diagrams.
The temperature of the hot water produced is
given in correspondence with each curve, to
which reference is made, assuming a difference
of 5°C/41°F between inlet and outlet from the
total recuperator.
The cooling capacity (Pf) is obtained from the
distance between the recovery heating capacity
(Pr) and input power (Pa).
Nominal value referring to:
Air temperature
35°C / 95°F
Water at the desuperheater
50°C / 122°F
∆t
5°C / 41°F
Units with Total Recovery (T) do not envision the fol-
lowing versions:
YT
XT (only for temperature under 4°C/39,2°F)
35°C / 95°F
40°C / 104°F
45°C / 113°F
50°C / 122°F
55°C / 131°F
5
0,9
1,0
1,1
1,2
1,3
1,4
1,5
6
7
8
9
10
11
12
13
14
15
16
17
18
°C
64,4
°F
41
41
43
45
47
49
51
53
55
57
59
61
63
Temperature of the water produced
RECOVERED HEATING CAPACITY CORRECTIVE CO-EFFICIENTS
Cr
35°C / 95°F
40°C / 104°F
45°C / 113°F
50°C / 122°F
55°C / 131°F
5
0,7
0,8
0,9
1,0
1,1
1,2
6
7
8
9
10
11
12
13
14
15
16
17
18
64,4
°F
°C
41
41
43
45
47
49
51
53
55
57
59
61
63
INPUT POWER WITH RECOVERY CORRECTIVE CO-EFFICIENTS
Ca
Temperature of the water produced
12.1. PRESSURE DROPS
The NRL models with total recovery always have
1 recuperator.
The features of the recuperators and the pressure
drop curves are given below; filter losses are not
considered.
The pressure drops in the diagram are relative to
an average temperature of 50°C / 122°F.
Shows the corrections to apply to pressure drops
on variation of the average water temperature.
TOTAL RECOVERY PRESSURE DROPS
Pr
essur
e dr
op
Water flow rate
l/h
gmp
psi
kPa
0
200
400
600
800
1000
1200
1400
1541
0
20
40
60
80
100
120
140
160
180
200
0
50000
100000
150000
200000
250000
300000
350000
0
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
1
2
3
4
5
6
7
