NuAire DuctMaster DCB 315, Installation And Maintenance Manual

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Installation and Maintenance
DUCTMASTER BIFURCATED
could be attached to the feet of the fan in order to determine
the ducting centreline relative to the mounting plane.
(Foot fixing centres are shown on fixing details drawing
which should allow the brackets to be pre fitted to the wall
ready to accept the fan assembly).
Consider the position of the fans electrical terminal box
when choosing an installation position.
Assuming that the position for mounting has been chosen.
and any wall brackets (if used) are already correctly located,
stand or support the unit in place and check the unit is
aligned with the ductwork in both horizontal and vertical
planes. A degree of adjustment is provided on the feet but it
may be necessary to pack up the height under the mounting
feet. See fixing details on page 9.
Mark on the floor / structure the fixing positions for the feet
or resilient mountings and if necessary drill suitable holes to
accept bolt or screw fixings (screws not supplied).
If matching silencers are to be installed, these should be
fitted to the fan with any other accessories such as flexible
connectors etc. before installation and the complete assembly
mounted in position using the same procedure.
The matching flanges if required on the installation are
fixed to the ductwork ends with rivets etc. Ensure the
clamping collars have been placed onto the ducting before
drawing the flanges together. Note: make sure the flange
faces are properly mated before fitting and tightening the
clamping collars.
Suspended horizontally or vertically
The only difference for suspension is in the positioning of
the mounting feet which are now fixed to the sides of the
mounting pads by the smaller single hole leg of the feet.
See fixing details on page 9.
If Resilient Mountings are to be included note that the
rubber mountings must remain in compression - this
involves fixing the rubber mounting upside down inside
the foot. The large metal safety washers must be fitted
under the studding nuts on each mounting. See Resilient
Mounting assembly (suspended) drawing on page 6.
General.
Motors are totally enclosed and protected to IP55 (Dust and
low pressure water jets). Motors may incorporate drain
holes to allow any condensation to escape from the motor
casing. It is essential therefore that these drain holes
are positioned at the lowest point of the fan motor
when the unit is horizontally mounted.
All bearings are pre-packed with grease and sealed for life.
3
Handling
The DuctMaster fan impeller is carefully balanced prior
to despatch. Care must be taken on site when handling the
unit not to damage or distort the blades or alter the motor
position. Do not pass lifting slings etc through the impeller.
Always use the mounting pads (top or bottom) for sling
attachments.
The fan is supplied with installation accessories i.e. two
matching flanges, two clamping collars and four mounting
feet attached. These items are fitted before delivery to
ensure parts are not lost on site. If the optional flexible
connectors are specified these will be fitted for delivery to
the customer. However care must be taken when handling
the unit assembly as the flexibles can be distorted or damaged.
Installation
Application
Unit
For external use it is good practice that the unit is installed
so that the motor tunnel is horizontal. Also the unit will be
painted RAL9014 (grey) which is suitable for maximum
temperatures of 230
o
C.
For internal use it is good practice that the unit be installed
so that the motor tunnel is vertical for a horizontal airflow.
Prior to installation the impeller should be rotated by hand
to check for smooth rotation and that no transit damage has
occurred.
Horizontal on floor etc.
Before commencing work it will be necessary to remove the
clamping collars and loose flanges. Simply unscrew the
clamp nut using a suitable spanner.
Note: during installation, ensure that the flanges are mated
together correctly before tightening the clamps.
The position of the shakeproof washers on the foot
mountings is important as these washers are fitted to restrain
any longitudinal movement of the feet. See fixing details on
page 6 noting that you have a choice of two holes when
fitting the feet for floor mounting.
If the optional resilient mountings have been chosen these
should be attached to the unit feet at this stage. See Resilient
Mounting assembly (floor mtg) drawing on page 6.
Note that the large steel safety washers in the mounting kit
are not required for floor mounting and can be discarded.
Details of resilient mounting kit selection is shown in the
table on the same page.
If the optional wall support brackets are to be used they