MG2S Installation Manual

17
Installing the Furnace
Sides and back of the furnace may be enclosed by wall
framing such as in a closet or alcove. The dimensions
of the room or alcove must be able to accommodate the
overall size of the furnace and the installation clearances
outlined on page 5 and Figure 1, Figure 2, Figure 3, &
Figure 4. The furnace shall be appropriately connected to
the supply and return air distribution system as shown in
Figure 23 (page 29) & Figure 24 (page 30).
1. Remove furnace outer door(s) and bottom fuel line
knockout.
2. Place furnace onto duct connector and center with floor
opening.
3. Slide onto mounting plate. (Bottom rear slots on furnace
should engage with mounting plate tabs.)
4. Secure front with one (1) fastener at each corner. See
Figure 16.
NOTE: Additional fasteners may be used at rear, sides
or through door frame, as desired, to secure furnace to
closet or alcove framing.
Condensate Drainage
WARNING:
The condensate produced by the furnace must
be drained. Do not connect a water supply to the
drainage hose of the furnace.
CAUTION:
Do not install additional traps in the condensate
drain.
• If the furnace is installed in an area where
temperatures fall below freezing, special precautions
must be made for insulating condensate drain lines
that drain to the outdoors. If condensate freezes
in the lines, this will cause improper operation or
damage to the furnace. It is recommended that
all drain lines on the outside of the residence be
wrapped with an industry approved insulation or
material allowed by local code.
• Before routing the drain tube out of the furnace, loosen
the tube clamp and turn the tube so the preset 90° turn
faces the intended direction of exit from the cabinet.
Do not route the drain tube without rotating the tube
first. This will kink the tube and prevent condensate
from draining.
• Care should be taken to route the drain line away from
the burner box. Drain lines resting on the burner box
can become kinked or collapsed due to the heat from
the burner box.
• The condensate drain may exit through the left or right
slots in the bottom of the furnace. See Figure 17 (page
18). Make sure the flexible drain hose is not kinked.
• The condensate should drain from the plastic collector
box as droplets or a small stream. If you notice the
furnace has operated for more than 5 minutes without
draining or the status lights on the control board indicate
an open pressure switch as listed in Table 5, (page
27), follow the steps below.
Figure 14. Screw-Down Duct Connector
Tabs slide into slots
in back of furnace
Mounting
Plate
Screw Down
Duct Connector
Supply
Air Duct
Hole for
Gas Line
Wood Floor
Figure 16. Cabinet Furnace on Supply Air Duct
MTG. PLATE TABS
SLIDE FURNACE
ALL THE WAY BACK
ONTO MTG. PLATE
SUPPLY AIR DUCT
Knockout Over Holes
SECURE FURNACE WITH
2 FASTENERS IN FRONT
Tabs slide into slots
in back of furnace
Mounting
Plate
14” Round
Duct Connector
Optional Hole
for Gas Line
Optional Hole
for Gas Line
Figure 15. Round Duct Connector