1
21. 10. 19. Leaflet Number 671834
nuaire.co.uk
029 2085 8400
The EMC Directive
2014/30/EU
The Low Voltage
Directive
2014/35/EU
Squif - SQF
High Temperature 400°C for 2 hr
Single In-line Fans 50 / 60 Hz
Installation and Maintenance
IMPORTANT
Please ensure that there is adequate clearance for the removal
of the motor/fan assembly for maintenance purposes.
IMPORTANT
AV mounts isolate the fan only. Silencers/backdraught
dampers and other "significant mass" accessories should form
part of the fixed ductwork after the flexible connection.
1.0 INTRODUCTION
The Squif range of fans are designed for in-duct applications.
Manufactured from galvanised steel, they are suitable for in or outdoor
installation and can be installed in a horizontal or vertical attitude.
For full unit description, dimensional, weight and performance details
refer to Nuaire catalogue.
The units are designed for:
S1 DUTY - Day to day operation and in the
event of fire a one off emergency use.
2.0 HANDLING
Handle the unit with care. Note the weight from the rating plate, lift
using slings attached to the four lifting eyes as (see fig. 1).
Care must be taken when handling a unit/attenuator assembly fitted
with flexible connectors as the connectors can be distorted or damaged.
Figure 1.
3.0 INSTALLATION AND GENERAL ADVICE
Installation must be carried out by competent personnel, in accordance
with good industry practice, the appropriate authority and in
conformance with all statutory and governing regulations e.g. lEE,
CIBSE, HVCA, BSI and EN standards etc.
Before commencing installation check that all material, including
mounting feet and optional ancillaries are available to complete the
work. Every unit is tested and serialised at works and a test certificate
produced, the details are also recorded on the fan side rating plate
which should also be referred to before handling and installation. Any
damage or deviations should be immediately reported to the seller/
supplier/agent quoting the order and rating plate details.
Rotate the fan impeller by hand to ensure free and smooth rotation and
that no handling or transit damage has occurred, observe the direction
of flow/direction of rotation arrow and ensure that:
•
All optional accessories such as support brackets, attenuators,
guards, flexible connectors etc. are assembled to the fan.
•
Support brackets are fitted appropriate for the installed attitude -
vertical or horizontal.
•
When offering the fan to the ducted system that both inlet and
outlet connections are perfectly aligned.
It is advisable to fit flexible connectors on either side of the fan unless
there is an open-ended inlet or discharge and the fan should be
supported on Anti-Vibration mounts. The AV's should be levelled off to
maximise isolation and the flexible connectors correctly aligned with
the fan at the correct tension.
3.1 Mechanical Installation
Fans are suitable for both internal and external installation and whilst
they can be installed in either the recommended vertical (installation
type A) or alternative horizontal (installation type B) attitude, the
standard brackets provided are suitable only for the more conventional
vertical (A) mounting position.
Where silencers are to be fitted to the unit (for all sizes except
SQF41), installation type A should be used to ensure silencer
splitters are vertically orientated (Figure 2). SQF41 silencers are
square and can be rotated to ensure vertical orientation in either
installation type.
For horizontal (B) mounting (Figure 3), observe the centre of gravity
(approximately 100 - 150mm left of flange) and fit an angle bracket
or unistrut steel bar (not supplied) to brace the unit. Fit AV mounts
equidistant of CG line and at a safe distance so as to level unit.
Bracket
A
Note: Installation A silencer
splitters are vertical
Bracket
Approx
CG line
AV’s equidistant of CG
Note: Installation B silencer
splitters are horizontal (except SQF41)
B
Figure 2. End view of recommended vertically mounted unit
installation (bracket supplied).
Figure 3. End view of non-recommended horizontally mounted unit
installation (bracket by others).
