Page 22
TYPICAL EXHAUST PIPE CONNECTIONS AND CONDENSATE TRAP INSTALLATION
IN UPFLOW OR DOWNFLOW DIRECT OR NON−DIRECT VENT APPLICATIONS
(Right−Hand Exit in Upflow Application Shown)
FIGURE 23
VENT PLUG
(Must be
glued in
place)
PLUG
PLUG
CONDENSATE
TRAP
(Must be installed
on same side as
exhaust piping)
PLUG
G61MPV−110, −111,
−135 with
3" OR 4" vent pipe
2"
G61MPV−070,
−071, −090, −091
with 2−1/2", 3", or
4" vent pipe
TRANSITION
(use only if 4"
pipe is
required)
4"
2"
2" max
length
2−1/2",
3", OR
4"
TRANSITION
2"
2"
G61MPV−110,
−111 with
2−1/2", 3", OR 4"
vent pipe
*2"
TRANSITION
2−1/2",
3", OR
4"
2"
2"
or
45°
MAX
45°
MAX
SIDE VIEW
*2" diameter street elbow provided.
** Street elbow may be used on −045, −070, 071, −090, −091.
3" to 2" REDUCING ELBOW
(provided)
**
2" max
length
FIGURE 24
TYPICAL EXHAUST PIPE CONNECTIONS
HORIZONTAL DIRECT OR
NON−DIRECT VENT APPLICATIONS
(Horizontal Right−Hand Air Discharge Application Shown)
2"
2"
2"
*2"
2−1/2",
3", OR
4"
DO NOT transition
from smaller to larger
pipe size in horizontal
runs of exhaust pipe.
TRANSITION
−36B−045
−36B−070
−36B−071
−36C−090
−60C−090
−60C−091
−60C−110*
−60C−111*
−60D−135*
−36B−045
−36B−070
−36B−071
−36C−090
−60C−090
−60C−091
*Limit pipe
length to 2" in −110, −111,
−135 applications.
Intake Piping
The G61MPV furnace may be installed in either direct vent
or non−direct vent applications. In non−direct vent applica-
tions, when intake air will be drawn into the furnace from the
surrounding space, the indoor air quality must be consid-
ered and guidelines listed in Combustion, Dilution and Ven-
tilation Air section must be followed.
The G61MPV unit is designed for either left−side or right−
side air intake connections in either upflow or downflow ap-
plications. In horizontal applications, air intake must be
brought in through the top. Intake air piping is independent
of exhaust piping.
Follow the next four steps when installing the unit in direct
vent applications, where combustion air is taken from
outdoors and flue gases are discharged outdoors. The
provided air intake screen must not be used in direct
vent applications.
1 − Use transition solvent cement to connect PVC pipe to
the ABS slip connector located on the side of the burn-
er box.
2 − Use a sheet metal screw to secure the intake pipe to
the connector, if desired. A pilot indentation is pro-
vided in the slip connector to assist in locating and
starting the fastener.
3 − Glue the provided 2" ABS plug into the unused ABS air
intake connector on the opposite side of the cabinet with
ABS all pupose cement.
4 − Route piping to outside of structure. Continue with
installation following instructions given in general
guide lines for piping terminations and in intake and
exhaust piping terminations for direct vent sections.
Refer to figure 25 for pipe sizes.
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