04. 02. 20. Document Number 671834
4
Nuaire |
Western Industrial Estate
|
Caerphilly
|
CF83 1NA
|
nuaire.co.uk
SQF
Installation Manual
W2
L1
U2
L2
V2
L3 E
U1 V1 W1
380V 3 phase 60Hz supply
400V 3 phase 50Hz supply
460V 3 phase 60Hz supply
1U
1V
1W
2U
2V
2W
Motor
terminal
box
380V 3 phase 60Hz supply
400V 3 phase 50Hz supply
460V 3 phase 60Hz supply
L1
L2
Low
Speed
High
Speed
L3
L1
L2
L3
Motor Terminal Box
Note: High Speed -
Supply: 2U 2V 2W
Link: 1U 1V 1W
Low Speed -
Supply: 1U 1V 1W
1U 1V 1W
400V 3 phase 50Hz supply
C1
C2
C3
L1 L2 L3
A1
A2
A2
A2
A1
A1
1 3 5
1 3 5
1 3 5
2 4 6
2 4 6
2 4 6
2U 2V 2W
E
For low speeds connect
Contactor C1
For High speed connect
Contactor C2 and C3
380V 3 phase 60Hz supply
460V 3 phase 60Hz supply
L1 L2 L3
PE/
L/L2
L1
U
N/L3
V
W
3 Phase only
INVERTER SPEED CONTROL
Connections
to motor
Motor
3 phase
3 Phase input
380V 3 phase 60Hz supply
400V 3 phase 50Hz supply
460V 3 phase 60Hz supply
6
7
8
9
Wiring - Three Phase (4kW and Above) - Single Speed
Wiring - Three Phase - Two Speed Dual Wound Motor D.O.L.
Starting (Both Speeds), Observe Motor Plate & Connection Details
Wiring - Three Phase - Two Speed TAP/PAM Wound Motor
Wiring - Three Phase - Matched Frequency Inverter - Single Speed
4.5 Inverter Control
Where fans are connected to frequency inverter controls, the electrical
supply to the fan must bypass the inverter under fire conditions.
Screened cable must be used. Maximum length should be 30m and
must be earthed at both ends and continually earthed through any
insulators.
5.0 SPECIFIC COMMISSIONING AND SERVICING
REQUIREMENTS
400°C for 2 hours Units for Smoke Extract
Exposure temperature/time: 400°C for 2 hours
These units are used to provide a SAFETY FUNCTION for people
in the event of fire in public premises or in the home: they are
therefore subject to strict constraints concerning their operating and
maintenance.
Operating Constraints
i. Check on the nameplate that the selected unit corresponds to the
maximum exposure temperature and duration.
ii. Non ventilated motors MUST be placed in the airflow from the driven
fan. Ventilated motors can be placed outside the flow.
iii. AFTER THE UNIT HAS BEEN SUBJECTED TO ONE EMERGENCY
DUTY OPERATION, IT MUST BE REPLACED.
iv. With variable speed control. Ensure that the maximum speed never
exceeds the speed of the motor supplied by the mains and that the
delivered power corresponds to the previous definitions. The unit
should be equipped with PTC thermistors connected to the protection
system during S1 duty and switched off during S2 duty (operation
during an emergency).
These qualifications ensure the qualification of the driven fan by the
manufacturer.
Maintenance Constraints
Regular service visits must be performed on the installation AT
LEAST EVERY 6 MONTHS, incorporating the following checks:
i. Checking the insulation resistance (R>100 MOhms, 500V DC)
•
If the drain holes are blocked, open them to eliminate any
accumulated condensation.
•
If R<100 MOhms, dry the stator in an oven and check the
insulation resistance. If the fault persists, replace the stator.
•
The stator must be replaced 5 years after installation or after
20,000 hours of operation.
ii. Cooling check
•
Ensure there is no dust or grease in the entire ventilation circuit
(housing fins, motor cover/fan if fitted driven fan).
•
Ensure the motor runs normally when switched on for a few
minutes.
iii. Bearing check (C3 or C4 play)
Run the motor during each maintenance visit. When the motor is cold,
a high level of noise may be caused by the texture of the grease. This
does not indicate a bearing fault.
S2 duty only:
The bearings must be replaced by an identical type every 5 years.
Ensure the motor runs normally when switched on for a few minutes.
