Multizone Assembly
The multizone section may ship completely assembled or
it may ship in numerous pieces . Whether the section ships
in a single piece or multiple pieces depends on customer
requirements and the unit size . When a multizone section is
over 90" high or 90" wide, split it into sections for shipping.
The unit may ship in 1, 2, 3, 4, or 5 separate pieces, see
Figure
29
. Typically, the multizone damper assembly ships separately
(see
Multizone Damper Assembly
and
Figure 29
) and must
be attached at the job site . Attach the damper after the other
components are assembled. Use the instructions below for
assembling the multizone section (also refer to
Figure 29
) .
1 . If the diffuser and the cold deck section ship separately,
join them together first. The joining collar mounted in the
diffuser fits into the entering air side of the coil section.
Line up the two sections and fasten together.
2 . Once the diffuser and cold deck sections are joined, lift
the hot deck and bypass sections in place on top of the
diffuser/ cold deck section . If possible, assemble the
hot deck and bypass section (if there is one) together
before lifting on top. There always is a joining collar in
the diffuser. The joining collar provides the seal between
the sections joints. It is important to line up and fit the
collar in the hot deck and bypass section . For vertical
applications, the cold deck also has a joining collar in the
discharge opening. This collar fits in the bottom of the
vertical bypass section .
3 .
After the components in the multizone are fitted together,
fasten the joining plates to the corners in the unit exterior .
4 .
If a damper was ordered, assemble it to the section (see
Multizone Damper Assembly
and
Figure 29
) .
NOTE: Verify that the joining collars are aligned to seat into
the gasket . Straighten any collars distorted from
shipping or from rigging .
Figure 28: Multizone Sections Assembly
Multizone Damper Assembly
When a multizone unit is ordered with dampers, depending
on the multizone configuration and size, the damper assembly
may ship separately (all horizontal and units with a total height
over 90") .
When the dampers are not factory assembled to the unit, they
ship to the job site on a skid. An assembly kit with screws and
an instruction drawing are included with the damper for field
assembly to the unit .
To assemble:
1 . First remove the side plate that encloses insulation from
both sides of the damper assembly .
2 . Lift the damper assembly into position (
Figure 29
) .
3 .
Fasten the assembly to the frame channels within the
multizone openings .
4 . Use caulking to seal up the areas around the unit frame
channel to prevent any air leakage .
5 . After caulking, put the side plates back in place and
secure . Damper shaft extensions are provided on both
ends of the damper assembly for actuation . The dampers
are linked together by a linkage bar on both ends of the
damper . The linkage bar is cut at the time of installation
to divide the damper into the required number of zones
(refer to
Multizone Damper Adjustment on page 17
) .
Figure 29: Multizone Damper Assembly
Cooling coil
Cooling coil
Diffuser
Joining
collars
Zone
damper
assembly
Upper unit—heating
(and optional bypass)
IM 672-11 • VISION AIR HANDLING UNIT 16
www.DaikinApplied.com
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