Single Stage Multi Position Furnace
Service Manual
38
440 08 2001 02
AI
R
F
LO
W
AI
R
F
LO
W
LEFT Side Venting
Supply Air
Inle
t
Combustion
Air Pipe,
N9MP2 ONLY
Combustion Blower
(Rotate 180
°°°°
for
Right Side)
Plastic
Cap
Pressure Hose,
Blower
Pressure Switch, Blower
Pressure Switch,
Transition
Pressure Switch Hose,
Transition
Some Models have one
pressure switch
3
/
4
²²²²
Hose
& Clamps
Return
Air
Transition
Box
Drain Line
Condensate
Trap & Gasket
5
/
8
²²²²
Hose & Clamps
Plastic Caps
Vent Pipe
Grommet
Vent Fitting & Clamps
Ex
ha
us
t
Gas Pipe
Grommet
Vent Pipe
Yellow Plastic
Cap
90
°°°°
Elbow
Combustion Blower
Mounting Screws (4)
Preassemble &
insert into furnace
Trap Connection
“Clamp ears”
Pointed OUT
Figure 46
Upflow Installations (Single Pipe & Direct Vent N9MP1 & N9MP2--A2 Models)
dwg 25--23--57
Rotate
downward
20
°°°°
to 30
°°°°
DRAIN SIDE VIEW
NOTE: TRAP MUST BE PRIMED BEFORE OPERATION
Upflow Installations -
(Single Pipe & Direct Vent N9MP1 & N9MP2 Models) (See Figure 46)
Note:
For easier installation of the drain hoses and clamps to the
condensate trap, follow the directions outlined below except do not
make any clamp connections to any of the drain stubs and hoses
until the hose routing and lengths have been determined. Remove
the condensate trap and drain hoses from the furnace and secure
the drain hoses to the drain stubs on the trap with the hose clamps
(position the clamps as shown in
Figure 46).
Install the condensate
trap/hose assembly to the furnace casing. Hook one side of the
“clamp ears” on the drain stub through the hole in the casing and
push the condensate trap into position. Secure with the two screws.
Reconnect the drain hoses to the stubs on the vent fitting and the
plastic transition and secure with the clamps.
Mount the condensate drain trap in a vertical position to either the
left or right side of the furnace using the two screws and gasket that
are provided. If needed, remove the hole plugs from the furnace
side panel and relocate to the open set of holes in the opposite side
panel.
NOTE: All gaskets and seals must be in place for sealed combus-
tion applications.
Ensure that the vent fitting is securely attached to the combustion
blower using the rubber coupling and clamps.
