McQuay MHC Series, Installation & Maintenance Data, Page: 5 / 36

IM 985-1 / Page 5 of 36
Figure 2. Unit Mounting Details
7. Remove the filter and locate the existing 1/4"
mounting­holes­in­the­bottom­of­the­subbase­labeled­
(5)­in­Figure­2­subbase­detail .
8 .­ Be­sure­the­subbase­is­tight­to­the­wall .­Transfer­
a mark with a marker or pencil to the floor at
mounting­hole­locations­(5) .
9. Move unit away to pre-drill 1/4" mounting holes in
the floor at marked locations.
Clean unit mounting area of all construction debris. Check
that the floor is level and at 90 degrees to the wall as
shown in Figure 2.
McQuay recommends the placement of a sound absorbing
mat beneath the unit footprint before continuing to the next
installation step.
Note: Use the appropriate fasteners by others in
accordance with local building codes.
10 .­Insert­fasteners­through­the­mounting­holes­in­
the subbase and secure the subbase to the floor,
tightening­the­fasteners .­Do­not­over-tighten­
fasteners­and­distort­or­warp­the­subbase­plate .
IMPORTANT
11 .­Use­a­carpenters­square­and­level­to­check­that­the­
unit is level and 90-degrees to the wall and floor (see
letters­C­&­D­in­Figure­2) .
12 .­The­chassis­back­panel­has­a­series­of­slots­on­the­
back flange to mount the assembly to the wall. It is
the­installing­contractor’s­responsibility­to­select­the­
correct­fasteners­for­each­unit­to­meet­local­codes­
(see­letter­E­in­Figure­2) .
Note: Use a minimum of three fasteners to secure
the unit (field supplied). Secure two fasteners into
wall studs.
At location(s) where no stud is present, secure with
a Toggle bolt or equivalent (by others) (see letter F
in Figure 2).
13 .­Reinstall­the­panels­in­reverse­order­as­performed­in­
steps­3­through­5­on­page­4 .
14 .­Cut­out­one­side­and­the­bottom­of­the­shipping­
carton,­leaving­the­top­and­three­sides­to­place­over­
the­unit­for­protection­during­construction .