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17. 08. 17. Leaflet Number 671392
The EMC Directive
2014/30/EU
The Low Voltage
Directive
2014/35/EU
Twin Squif - SQFTA
In-line Fans 50 / 60 Hz
Installation and Maintenance
Nuaire: A Trading Division of Polypipe Limited
1.0 INTRODUCTION
The Twin Squif fan range is designed for in-duct application.
Manufactured from galvanised sheet steel, they are suitable for
indoor and outdoor installation. They can be installed with the
airflow discharging horizontal or vertically upward. Backdraught
dampers are fitted to prevent internal recirculation.
Operating range: 0°C to 90°C; up to 100% RH within the duct; please
note the motor must be located in ambient temperature between
-10°C to 40°C.
When conveying moisture laden air, provisions must be made to drain
off any condensate from within the duct work.
Ecosmart versions (suffix ES in product code) are supplied with
Ecosmart inverter control which will switch on the standby fan in case
of fan failure and will also provide 12hr duty-sharing operation.
Basic versions of the fan are supplied without any controls. It is the
responsibility of the specifier and/or contractor to provide a suitable
control for the fan and fan failure detection.
4.0 MECHANICAL INSTALLATION
The fans are suitable for both indoor and outdoor installation. However;
the Ecosmart control is not weather proof and should either be fitted
indoors or with the weathering cover (ES-ISCT-WP) to protect the
control outdoors. Note the control must be wall mounted in both
indoor and outdoor situations.
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
damages or deviations should be immediately reported to the seller/
supplier/agent quoting the order number and rating plate details.
2.0 HANDLING
Handle the unit with care
and note the weight of the
unit.
Always lift the unit by
attaching the sling to the
motor mounting arms and
load spreaders must be
used to prevent distortion
to the fan case.
Figure 1. Lifting with a load
spreader.
Figure 2. AV mounts fitted to unit mounting feet
(supplied) in horizontal discharge mode.
Figure 3. Unit in vertical discharge mode, mounted on support
beam using AV mounts.
AV mounts available
as an ancillary item
Mounting feet
(supplied).
FLOW
FLOW
Mounting feet
(supplied).
Support beam
AV Mounts
Flexible
connector
Dampers
The fans can be mounted with the airflow discharging horizontally or
vertically upward (see table page 2). These units contain heavy rotating
parts, please ensure any framework and structure can adequately
support the weight of the unit. Do not use the flanges of the fan
to support the weight of the ductwork; these must be supported
separately.
The ducting must be the same dimension as the fan for at least 1m
at the discharge of the fan before any transition. This is to allow the
free movement of the dampers and to minimise pressure losses.
We recommend the use of anti-vibration mounts to minimise the
transmission of vibration into the building structure.
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 AV mounts.
The AVs should be levelled off to maximise isolation and the flexible
connectors correctly aligned with the fan at the correct tension.
