Payne PG9MXA Installation, Start-Up, And Operating Instructions Manual page 38

NOTE: Select 1 vent pipe connection and
1 combustion-air pipe connection.
AIR
FLOW
COMBUSTION- COMBUSTION-
AIR AIR
VENT
VENT
*
†
UPFLOW
COMBUSTION-
AIR
VENT
**
AIR
FLOW
†
† †
HORIZONTAL-LEFT DISCHARGE
* For Non-Direct Vent (1-Pipe) system, orient elbow so that its
opening faces down.
** For Non-Direct Vent (1-Pipe) system, orient elbow so that its
opening faces sideways.
† An external trap kit (see furnace product data sheet) must be used.
† †
Bottom combustion-air not allowed for non-direct vent
Fig. 38 - - Combustion-Air and Vent Pipe Connections
Table 11 – Furnace Setup Switch Description
SETUP
SWITCH NORMAL
SWITCH
NAME POSITION
NO.
Adaptiv
SW---1 e Heat OFF
Mode
Blower
ON or
SW---2 OFF
OFF
delay
Blower
ON or
OFF
SW---3
OFF
delay
Table 12 – Blower Off Delay Setup Switch (SW)
2-Stage Units
DESIRED HEATING MODE
BLOWER-OFF DELAY (SEC)
90
120
150
180
NOTE: Select 1 vent pipe connection and
1 combustion-air pipe connection.
VENT
VENT
*
†
COMBUSTION- COMBUSTION-
AIR AIR
AIR
FLOW
DOWNFLOW
COMBUSTION-
AIR
VENT
**
AIR
FLOW
† †
†
HORIZONTAL-RIGHT DISCHARGE
A05092
DESCRIPTION OF USE
When off, allows 2---stage
operation with a
single---stage thermostat.
Turn on when using 2---stage
thermostat to allow Low
Heat operation when R to
W/W1 closes and High Heat
operation when R to W/W1
and W2 close.
Control blower OFF delay
time. Used in conjunction
with SW---3. See Table 9B.
Control blower OFF delay
time. Used in conjunction
with SW---2. See Table 9B.
SETUP SWITCH
SW---2 SW---3
OFF OFF
OFF ON
ON OFF
ON ON
FIELD-SUPPLIED
2-IN. (51 mm) DIA.
PVC 90° ELBOW
COMBUSTION-AIR DISC
(FACTORY-SUPPLIED IN
LOOSE PARTS BAG)
Fig. 39 - - Combustion- -Air Inlet Pipe Assembly
Length of Straight Pipe Portion of
Combustion-Air Inlet Pipe Assembly --- (IN / mm)
CASING WIDTH
17---1/2 (445)
21 (533)
24---1/2 (622)
NOTE: (Direct Vent/2-pipe ONLY) vent pipe system has the
same diameter and same length as combustion air pipe mentioned
in section "Assembly of Combustion Air Pipe (Direct Vent/2-Pipe
system ONLY)."
NOTE: Do not count elbows or pipe sections in terminations or
within furnace (all elbows shown in Fig. 44 and Fig. 45 are not be
to counted).
2. Determine location of vent pipe connection to inducer
housing as shown in Fig. 38 for application.
3. Install vent pipe grommet (factory-supplied in loose parts
bag) into selected furnace casing vent pipe hole. (See
Fig. 40.)
4. Reposition elastomeric (rubber) inducer housing outlet cap
and clamp to appropriate unused inducer housing
connection. Tighten clamp.
WARNING
!
CARBON MONOXIDE POISONING AND PROPERTY
DAMAGE HAZARD
Failure to follow this warning could result in property damage,
personal injury or death.
Inducer housing outlet cap must be installed and fully seated
against inducer housing. Clamp must be tightened to prevent
any condensate leakage.
5. Be certain that mating surfaces of inducer housing
connection elastomeric (rubber) coupling, and 2-in. (51
mm) diameter vent pipe are clean and dry. Assemble the
elastomeric (rubber) vent coupling (with 2 loose clamps)
onto inducer housing connection. Insert the 2-in. (51 mm)
diameter vent pipe through the elastomeric (rubber)
coupling and fully into inducer housing connection until it
touches a stop inside the inducer housing outlet. Tighten
the screws on both clamps to 15-in-lb. of torque. pipe to
inducer housing. Tighten the clamp screws to 15 in.-lb. of
torque.
NOTE: Starting at furnace, slope vent pipe a minimum of 1/4-in.
(6 mm) per linear ft with no sags between hangers.
38
FIELD-SUPPLIED
2-IN. (51 mm) DIA.
PVC PIPE
A
A96211
A
8---1/2 ±1/2 (216 ±13)
10---1/2 ±1/2 (267 ±13)
12 ±1/2 (305 ±13)