National Ventilation UT150/SC User manual

UT150/SC
The UT150/SC features four speed settings and is supplied
complete with fixing brackets, rubber couplers and anti-
vibration connectors.
FUNCTION
The centrifugal in-line fan UT150/SC fan is used as an
under-floor extract and ventilation system designed to
remove gas from underneath the floor of a house and vent
into the atmosphere through a pipe.
There is a calibrated scale on the integral fan speed
controller 25,50,75 and 100%. It is usual to set it at 50% for
levels of approx. 200 plus Bqs up to approx. 1500bqs. The
lower and higher settings are generally for use after a re-
test or if the levels are exceptionally high.
Avoid installing the fan on an occupied bedroom wall if
running the fan at over 50% motor speed.
SPECIAL FEATURES
•IP rated box for speed controller and fused socket
•IP65 rated for external use
•Thermal overload protection
•Anti-vibration flexible connectors
GENERAL
•Robust non-corrosive casing
•Ball bearing motor
BENEFITS
•Easy to install
•Low noise
•Excellent for long duct runs
•Can be installed horizontally or vertically
SAFETY RECOMMENDATIONS
The fan conforms to the requirements according to
the EU norms and directives.
Precautions must be taken to avoid the back-flow of
gases (gas spillage) into the room from open flues to
gas appliances or open-fires. This includes locations
close to landfill sites (a methane test can be carried
out to ascertain if installation is possible).
Installation and connection of the fan should be done
by skilled electricians in compliance with the relevant
required documents.
Do not carry out any maintenance or repairs to the
fan unless the power supply has been disconnected.
Prior to connecting the fan to the power supply it is
necessary to make sure that there are no visible
faults on the rotor, case, grid and that there are no
foreign items in the airflow part of the case, which
may damage the rotor blades.
CAUTION:
Do not use the fan in highly explosive environments.
CONNECTION TO POWER SUPPLY
(Speed controller diagram separate)
1. The fan must only be connected to single
phase circuits
2. Make the wiring connections as indicated
(Fig. 1)
3. The position of the fan must comply with the
direction of the arrow on the fan casing.
4. Attach the brackets to the case.
5. Mount the fan to the wall using the anti-
vibration connectors.
6. Connect the fan to the pipe work using the
rubber couplers supplied with the fan.
PLEASE ENSURE THE CASING COVERING THE SPEED
CONTROLLER IS PROPERLY SEALED AS WATER
INGRESS CAN OCCUR AND WILL INVALIDATE ANY
WARRANTY OR GUARANTEE.
MAINTENANCE
The power supply to the fan must be disconnected
before any maintenance work is under taken.
WARRANTY
The UT150/SC has a three year warranty effective
from the date of purchase, provided it has been
installed according to the instructions supplied with
the unit, it has not been connected to an unsuitable
power supply and it has not been subjected to
misuse. If any part is found to be defective please
contact your supplier/installer. Return carriage is the
responsibility of the buyer. If it should become
necessary to return a faulty unit please contact our
office.
Please provide the following information:
Model Type:…………………………………………………………..
Voltage:……………………………………………….…….…………..
Date of Purchase:………………………………….…………..……
Invoice Number:……………………………………………………..
Fig 1
Please note: the above information is for guidance only.
If you have any queries regarding the above please
contact us on our Helpline 01823 690290
L
N
L
N

Speed controller (MR1)
Surface mounting
Break mains voltage. Mount surface mounting case to the
wall
Together with included grommets. Connect according to
diagram.
Mount inner case in surface mounting case with included
screws.
Turn on mains voltage and controller. Adjust min speed and
Turn off controller. Mount cover with nut to surface
mounting case.
Push knob in place at off position. When needed, a 5mm
hole for condensation
Is to be drilled at the bottom of the surface mounting case.
Adjustment
Note! Trimmer (min) is adjusted so that the motor does not
stop due to variations of mains voltage and that it restarts
after power failure. (v conn 2): extra connection
to, for example, damper or use as inlet to the controller
without bypassing breaker of turning knob.
Connections
1. Power supply 230vac, 50hz
2. 230 vac not regulated output for connection lamp, valve,
and dampers. Or three wire
motor connection: branched off after switch (imax:2A)
input; to bypass switch
N. Neutral
3. Regulated output to motor
4. Fuse holder with spare
5. Min speed adjust trimmer
Faulty operation
Please check that: Right voltage is applied. All connections
are correct.
The machine to be regulated is functioning. The fuse in the
fuse box is ok.
The fuse in the controller is ok.
1 2 N N 3
M
230Vac
230Vac