McQuay MHC Series, Installation & Maintenance Data, Page: 4 / 36

Page 4 of 36 / IM 985-1
Note: If using the Alternate Unit Installation procedure
(Using Mounting Brackets, page 6) it is not necessary
to remove the top section. Continue with step 5 if
using the recommended method of installation.
5 .­ Open­the­control­door­and­remove­the­four­screws­
that­hold­the­top­panel­and­control­pad­in­place­
(numbered­3)­in­Figure­1 .­On­the­opposite­end­of­the­
cabinet­top­lift­off­the­blank-off­plate­to­the­right­and­
remove­the­last­two­mounting­screws­(numbered­4)­
in­Figure­1 .­Lift­the­top­panel­off,­turning­the­control­
pad so that it fits down through the opening in the
top­panel .
Note: After removing the panels, set aside in a safe
area where they will not be damaged.
STOP! If an outside air damper kit is to be installed,
refer to IM 974 for the manual damper and the
motorized damper kit and install it now.
6 .­ Position­the­chassis/subbase­against­the­wall­where­
the­unit­is­to­be­installed .­Remove­any­mouldings­
at the floor or wall (see letter A in Figure 2). Allow
adequate­room­for­piping­and­electrical­connections­
in­the­subbase­by­checking­the­electrical­connection­
end­of­the­subbase­and­chassis .
Note: Make sure electrical and piping connections
are in the proper location within the subbase end
piping compartment.
Unit Installation (Recommended)
Installation and maintenance are to be performed by
qualified personnel who are familiar with local codes and
Regulations, and experienced with this type of equipment.
1 .­ Consult­job­blueprints­for­unit­location .­Clean­area
­
where­unit­is­to­be­installed,­removing­all­
construction­dirt­and­debris .
2 .­ Remove­the­unit­from­the­shipping­carton­and­save­
the­carton­to­be­used­as­a­protective­cover­after­the­
installation­is­complete .­
3 .­ Remove­the­screws­(numbered­1)­shown­in­Figure­
1,­securing­the­right­and­left­side­/corner­panels­
to­the­subbase .­Lift­the­panels­up­and­out­until­the­
bottom­tab­clears­the­slot­in­the­subbase .
Note: Set the unit panels aside where they will not
be damaged.
4 .­ Remove­the­two­screws­(numbered­2)­in­Figure­1­
securing­the­front­panel­to­the­subbase­and­remove­
the­panel­by­lifting­up­and­tilting­out­until­the­panel­
tabs­clear­the­slots­in­the­subbase .
Sharp edges can cause personal injury. Avoid contact
with them.
CAUTION
WARNING
Figure 1. Cabinet Panel Screw locations and Panel Removal
Right Corner Panel
Blockoff Plate
Subbase
Front Panel
Left Corner Panel
Control Door