Isolation - Before commencing work make sure
that the unit, and any control are
electrically isolated from the mains supply.
3
NALTF/TRF
Roof and Plantroom Twinfans
15. 05. 17. Leaflet Number 671269
Electrical Installation Basic Layout
Figure 8. Basic internal layout.
NOTES:
Because the run and start currents depend upon the duty
and associated ductwork of an individual unit, the values
quoted in the table are nominal.
Run currents will be exceeded if the unit is operated with
its cover removed. The unit must NOT run for more than
2 minutes in this condition.
Electrical Wiring
Figure 9.
The fan will only operate when a 230V mains signal is
present at the SL terminal.
When the SL signal is switched off the fan will continuue to
run for a preset period (1-60 minutes). Adjust the overrun
time at the pot marked ‘-SL RUNON’.
Ensure the local isolator (by others) also isolates
the switched live.
400V 3 ph 50Hz Suppl
y
L
L
N
L3
L2
L1
N
FAN UNIT
Fan live applies to
Direct Drive fans only
(Link to be left in)
Fault indicating
voltage free
contacts
Note: relay is
energised if no
fault is present
i.e. COM - N O
is connected if
there is no fault
N O
N C
COM
SL
230V Switched live signal.
Remove L/SL link when using
Switched live overrun
adjustment
NAL-RFI Remote fan
indicator (supplied)
Basic fan wiring diagram for
NALTRF 9-15 and NALTF 9-15 only
Controls for NALTF/NALTRF 9-15
The NALTF/NALTRF 9-15 fan units incorporate an integral
auto-changeover controller which provides 12 hour duty
share operation and automatic selection of the standby fan
should the duty fan fail.
Fault indication to an external device is provided via volt free
contacts of a relay.
Note: the relay is energised when no fault is present.
Note: It is the responsibility of the installer to provide a
suitable switchable local isolator for maintenance purposes
etc.
NALTF/NALTRF 16-24 Inclusive
These fan units are supplied without any controls fitted.
The electrical power is connected directly to the motor.
Note that the motors are 5.5kW or higher and STAR-DELTA
starting or a Soft Starter should be used in the motor control
panel (by others).
4.0 Electrical Details
Run currents etc.
400V 3 Phase 50Hz
Unit Code
Speed
Power
f lc
sc
Weight
rpm
(kW)
(amps)
(amps)
kg
NALTF/TRF 9
1225
0.75
2.1
9.5
84.4
NALTF/TRF 10
1400
1.1
2.9
13.0
90.4
NALTF/TRF 11
1085
1.5
3.7
8.5
125
NALTF/TRF 12
1225
2.2
5.4
27.0
134
NALTF/TRF 13
1040
2.2
5.4
27.0
168.7
NALTF/TRF 14
1040
4.0
10.0
60.0
193.6
NALTF/TRF 15
1260
3.0
6.9
38.0
174.6
NALTF/TRF 16
1260
5.5
12.0
75.0
231.6
NALTF/TRF 17
1440
5.5
12.0
75.0
231.6
NALTF/TRF 18
700
5.5
12.0
75.0
730
NALTF/TRF 19
800
4.0
10.0
60.0
716
NALTF/TRF 20
800
11.0
23.0
154.0
794
NALTF/TRF 21
1000
5.5
12.0
75.0
730
NALTF/TRF 22
1000
11.0
23.0
154.0
794
NALTF/TRF 23
1100
11.0
23.0
154.0
794
NALTF/TRF 24
1200
11.0
23.0
154.0
794
