Danfoss vlt hvac drive fc 102 Operating Instructions Manual page 36

Mechanical Installation
CAUTION
A door fan(s) is required on the enclosure to remove the
heat losses not contained in the backchannel of the
frequency converter and any additional losses generated
from other components installed inside the enclosure.
3 3
The total required air flow must be calculated so that the
appropriate fans can be selected. Some enclosure
manufacturers offer software for performing the
calculations (i.e. Rittal Therm software). If the frequency
converter is the only heat generating component in the
enclosure, the minimum airflow required at an ambient
temperature of 45
converters is 391 m
required at an ambient temperature of 45
frequency converter is 782 m
Airflow
The necessary airflow over the heat sink must be secured.
The flow rate is in Table 3.11.
Enclosure
protection
IP21/NEMA 1
IP54/NEMA 12
IP21/NEMA 1
IP54/NEMA 12
IP00/Chassis
* Airflow per fan. enclosure type F contain multiple fans.
Table 3.11 Heat Sink Air Flow
34
VLT HVAC Drive FC 102 Operating Instructions
o
C for the D3 and D4 frequency
3
/h (230 cfm). The minimum airflow
o C for the E2
3
/h (460 cfm).
Door fan(s)/
Enclosure type Top fan
airflow
D1 and D2 3
170 m /h
(100 cfm)
E1 P315T5, 3
340 m /h
P450T7,
(200 cfm)
P500T7
E1 P355- 3
340 m /h
P450T5, P560-
(200 cfm)
P630T7
F1, F2, F3 and 3
700 m /h
F4
(412 cfm)*
F1, F2, F3 and 3
525 m /h
F4
(309 cfm)*
D3 and D4 3
255 m /h
(150 cfm)
E2 P315T5,
255 m 3 /h
P450T7,
(150 cfm)
P500T7
E2 P355- 3
255 m /h
P450T5, P560-
(150 cfm)
P630T7
NOTICE
The fan runs for the following reasons:
1.
2.
3.
4.
5.
6.
7.
8.
Once the fan is started it will run for minimum 10
minutes.
External ducts
Heat sink
If additional duct work is added externally to the Rittal
fan(s)
cabinet the pressure drop in the ducting must be
calculated. Use the charts below to derate the frequency
3
765 m /h
converter according to the pressure drop.
(450 cfm)
3
1105 m /h
(%)
90
(650 cfm)
80
70
3
1445 m /h
60
(850 cfm)
50
40
30
3
985 m /h
20
(580 cfm)*
10
3
985 m /h
(580 cfm)*
Illustration 3.36 D Enclosure Derating vs. Pressure Change
3
765 m /h
Frequency converter air flow: 450 cfm (765 m
(450 cfm)
1105 m 3 /h
(650 cfm)
(%)
90
3
1445 m /h
80
(850 cfm)
70
60
50
40
30
20
10
0
Illustration 3.37 E Enclosure Derating vs. Pressure Change
(Small Fan), P315T5 and P450T7-P500T7
Frequency converter air flow: 650 cfm (1105 m
MG11F402 - Rev. 2013-12-16
AMA
DC Hold
Pre-Mag
DC Brake
60% of nominal current is exceeded
Specific heat sink temperature exceeded (power
size dependent)
Specific Power Card ambient temperature
exceeded (power size dependent)
Specific Control Card ambient temperature
exceeded
0
0 0.5 4.9 13 27.3 45.9 66
Pressure Increase
0 0 0.1 3.6 9.8 21.5 43.4 76
Pressure Change
89.3 115.7 147
(Pa)
3 /h)
147.1 237.5 278.9
(Pa)
3
/h)