McQuay IM 777-4
7
Mechanical Installation
Panels, Frame Channels, and Doors
Panel Removal
To remove a side or top panel, remove the flat head Torx 30
fasteners along the sides of the panel. Lift off the panel after
removing all fasteners.
Frame Channel Removal
Frame channels that run the length of the unit along the top can
be removed to allow access to both the side and top of the unit.
To remove the frame channel, first remove the side panel(s).
Once the side panel is off, remove the flat head Torx 30
fasteners in the corner of the frame channels. Then pull the
frame channel out the side. Remove any panel screws that are
within one inch of the of the frame since they are engaged into
the gasketed flange of the frame (
Figure 10
).
Figure 10: Removing Panel Screws
Access Doors and Panels
For routine maintenance, access normally is obtained through
access doors or by removing side panels. Removing all flat
head fasteners along the sides of a panel allow it to be
removed.
Fan and filter sections are always provided with a service door
on one side of the unit. If requested on order, doors can be
provided on both sides of the unit. Optional service doors are
available for most section types and are provided based on
customer request.
Fan Section Doors
Note:
Opening fan section doors requires using a 1/2" socket
wrench, which satisfies ANSI standards and other codes
that require the “use of tools” to access compartments
containing moving parts or electrical wiring. See
Figure 11
.
1
Remove padlock if one is present.
2
Insert 1/2" socket into cup and rotate 1/4 turn clockwise
as shown in
Figure 11
. If the cup and handle are on the
left side of the door, rotate 1/4 turn counterclockwise.
3
Rotate the door handle 1/4 turn clockwise and then 1/4
turn counterclockwise to release any internal pressure or
vacuum and open the door. If the cup and handle are on
the left side of the door, rotate the door handle 1/4 turn
counterclockwise and then 1/4 turn clockwise.
4
To prevent air leakage, tighten the door panels by
adjusting the jam nuts.
Figure 11: Opening Fan Section Door
Remove panel
to remove frame
Remove any
panel screws that
engage frame
CAUTION
Sharp edges and coil surfaces are a potential injury hazard.
Avoid contact with them.
ATTENTION
Les bords tranchants et les surfaces des bobines sont un
risque de blessure. Ne les touchez pas.
CAUTION
DO NOT attempt to rotate the cup. Damage to the unit will
occur.
ATTENTION
NE PAS tenter de faire tourner la cuvette (cup). Ceci va
dendomagger l’unité.
OPEN
View from inside door
Jam
Nuts
Do Not Rotate Cup
