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Upflow Installations (Dual Certified *9MPD-A4 Models)
YellowPlasticCap
Vent Pipe
NOTE: TRAP MUST BE PRIMED BEFORE OPERATION
Combustion Air
TOP Venting Pipe (optional on
some models)
Supply _ _
Air
Vent P )eGrommet
Rubber Coupling Gas Pipe
Grommet
Sls"Hose&
Clamps
PlasticCap
Transition
Box
Transition
DrainLine
_ Component Identification for Illustration for
Figure 8 thru Figure 17 for specifies
Switch,
25-24-11
SinglePressureSwitch
CondensateTrap & Connectionsonallmodels
Gasket (Leftor Right except125
Side)
NOTE: DO NOT make connections 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 8). Install the condensate trap/hose assem-
blyto the furnace casing. Hook one side ofthe"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 transi-
tion 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 fur-
nace side panel and relocate to the open set of holes in the oppo-
site side panel.
NOTE: All gaskets and seals must be in place for sealed combus-
tion applications.
Coupling
Pressure Switch
Hose, Blower
/ Plastic Cap
Rubber Hose
Some Models have
one pressure switch
Blower
Pressure Switch
Hose, Transition
Return Air
_n "Clamp
ears"
Poin,ed
/ _ (_///Preassemble &
_. /_/ y/ inseri into fur-
nace
Ensure that the vent fitting and the 90 ° elbow are securely at-
tached to the combustion blower using the clamps. Note for prop-
er alignment of the vent pipe through the furnace, the 90 ° elbow
must be installed with the "UPFLOW" lettering on the 90 ° elbow
facing out.
NOTE: The 90 ° elbow is approved for use inside the furnace
ONLY.
Plug the upper drain stub on the vent fitting with the yellow plastic
cap.
For left side venting, remove 90 ° elbow from the vent fitting by
loosening the clamp on the vent fitting. Securely attach vent fitting
to combustion blower.
NOTE: For left side venting, the vent fitting MUST be installed
with the airflow marking arrow pointed toward the vent pipe, with
the drain stub at a 5° to 10 ° downward slope.
Connect the PVC vent extension pipe to the vent fitting. This pipe
has a built-in channel to assist vent condensate disposal.
Align the arrow on the PVC pipe with the airflow marking arrow on
the ventfittin . See label on the PVC i efor ro erinstallation.
44001 111400