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INTRODUCTION
The model PG9MXA 4-way multipoise, Gas-Fired, Category IV,
condensing furnace is available in model sizes ranging from input
capacity of 60,000 to 120,000 Btuh as a direct vent (2-pipe)
application as well as a non-direct vent (1-pipe) application.
APPLICATIONS
PROPERTY DAMAGE
Failure to follow this caution may result in property damage.
Local codes may require a drain pan under entire furnace and
condensate trap when a condensing furnace is used in an attic
application or over a finished ceiling.
CAUTION
!
Step 1 -- General
Some assembly and modifications are required for furnaces
installed in any of the 4 applications shown in Fig. 1. All drain
and pressure tubes are connected as shown in Fig. 6. See
appropriate application instructions for these procedures.
Step 2 -- Upflow Applications
In an upflow application, the blower is located below the burner
section, and conditioned air is discharged upwards.
CONDENSATE TRAP LOCATION
(FACTORY-SHIPPED ORIENTATION)
The condensate trap is factory installed in the blower shelf and
factory connected for UPFLOW applications. A factory-supplied
tube is used to extend the condensate trap drain connection to the
desired furnace side for field drain attachment. See Condensate
Trap Tubing (Factory-Shipped Orientation) section for drain tube
extension details. (See Fig. 5.)
CONDENSATE TRAP TUBING
(FACTORY-SHIPPED ORIENTATION)
NOTE
: See Fig.6 or tube routing label on main furnace door to
confirm location of these tubes.
1. Collector Box Drain, Inducer Housing Drain, Relief Port,
and Pressure Switch Tubes
These tubes should be factory attached to condensate trap
and pressure switch ready for use in
upflow
applications.
These tubes can be identified by their connection location
and also by a color label on each tube. These tubes are
identified as follows: collector box drain tube (blue label),
inducer housing drain tube (violet label or molded), relief
port tube (green label), and pressure switch tube (pink
label).
2. Condensate Trap Drain Tube
The condensate trap drain connection must be extended
for field attachment by doing the following:
f. Determine location of field drain connection. (See Fig.
2 or 6)
NOTE
: If internal filter or side Filter/Media Cabinet is used,
drain tube should be located to opposite side of casing from
return duct attachment to assist in filter removal.
g. Remove and discard casing drain hole plug button
from desired side.
h. Install drain tube coupling grommet (factory-supplied
in loose parts bag) in selected casing hole.
i. Slide drain tube coupling (factory-supplied in loose
parts bag) through grommet ensuring long end of
coupling faces blower.
j. Cement 2 factory-supplied 1/2-in. street CPVC elbows to
the rigid drain tube connection on the condensate trap.
(See Fig. 6.) These elbows must be cemented together
and cemented to condensate trap drain connection.
