Page 54
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 24
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 25
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"
*Limit pipe length to 2"
in G61MPV−110, −111
and −135 applications.
DO NOT transition from
smaller to larger pipe
size in horizontal runs.
TRANSITION
G61MPV−36B−045
G61MPV−36B−070
G61MPV−36B−071
G61MPV−36C−090
G61MPV−60C−090
G61MPV−60C−091
G61MPV−60C−110*
G61MPV−60C−111*
G61MPV−60D−135*
G61MPV−36B−045
G61MPV−36B−070
G61MPV−36B−071
G61MPV−36C−090
G61MPV−60C−090
G61MPV−60C−091
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 out-
doors and flue gases are discharged outdoors. The pro-
vided air intake screen must not be used in direct vent ap-
plications.
1 − Cement intake piping in slip connector located on the
side of the burner box.
2 − Use a sheet metal screw to secure the intake pipe to the
connector, if desired. A pilot indentation is provided in the
slip connector to assist in locating and starting the fasten-
er.
3 − Glue the provided 2" plug into the unused air intake con-
nector on the opposite side of the cabinet.
4 − Route piping to outside of structure. Continue with instal-
lation following instructions given in general guide lines for
piping terminations and in intake and exhaust piping ter-
minations for direct vent sections. Refer to figure 26 for
pipe sizes.
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