8
McQuay IM 672-3
Installation Guidelines
1
Place the vertical coil section in position. If an access
section is positioned downstream from the coil section and
not already assembled to the coil section, secure the two
sections together.
2
Lift the fan section on top of the vertical coil section, taking
care to line up the joining collar in the bottom of the fan
section.
3
For sizes 003 to 035, the bypass duct is integral to the unit
construction and does not require attachment to the bypass
section. For sizes 040 to 090, position and assemble the
bypass duct to the bypass section before joining to the fan.
4
Once the fan is positioned on top of the vertical coil section
and the bypass duct and bypass section are assembled,
position the two assemblies and line up the joining collars
with the openings in the fan and vertical coil section.
5
Once the sections are lined up and in position, secure the
unit together by fastening joining plates to the unit.
Figure 17: Assembly of fan coil sections
Unit Sizes 040 to 090 External Face and Bypass Duct
Assembly
When unit sizes 040 to 090 are ordered with external face and
bypass, the bypass duct ships separately and must be attached
to the unit in the field. The joining of the bypass duct to the unit
must be done after the unit is assembled. Also, if the bypass
duct is over 90" long, the duct does not ship in one piece and
must be field assembled. The field assembly of the bypass duct
to the unit requires the following steps. See Figure 18.
1
Position the unit shipping sections together and assemble in
the equipment room.
2
After the unit is assembled, lift the duct into position over
the unit. Joining collars are shipped factory assembled to
the unit and duct. There is a joining collar located in the top
of the bypass opening and in the leaving air side of the
bypass duct. These joining collars are used to provide air
seals. Line up the duct with the top openings in the unit.
3
If the bypass duct is longer than 90", the duct ships in more
than one piece and must be field assembled. Place the piece
of duct that has the joining collar on the bottom on top of
the unit first. Once it is in place, position the other piece of
duct. Take care to fit the splice collar into the first piece of
duct and then lower the other end into the bypass opening.
4
Once the duct is positioned correctly, fasten the duct pieces
together with the joining plate provided. To do this, remove
the fasteners in the corners of the duct assemblies, place the
plate over the holes in the corners, and then replace the
fasteners. See Figure 7 on page 4
.
Figure 18: Assembly of bypass duct to unit
Joining
collar
J o i n i n g C o l l a r
J o i n i n g C o l l a r
J o i n i n g C o l l a r
