In Canada construct all combustion-air and vent pipes for this unit
of CSA or ULC certified schedule-40 PVC, PVC-DWV or ABS-
DWV pipe and pipe cement. SDR pipe is not approved in Canada.
A secondary vent pipe drain (provided) MUST be installed in the
furnace vent pipe as shown in Fig. 6 and 7. This ensures proper
drainage of condensation that collects in the vent pipe. A vertical
pipe may be installed in the inducer housing outlet, but it must turn
horizontally at a 90° angle into the vent drain before continuing out
of the structure. (See Fig. 6 or 7.) No straight vertical vent piping
may be used.
The vent terminal bracket described in the next section MUST be
used in constructing the vent terminal for this unit. Pipes must
terminate through either the roof or the sidewall although roof
termination is preferable. Locate sidewall terminations to prevent
damage to shrubs, condensing unit, and siding materials. Table 6
gives clearance requirements.
Table 6—Combustion-Air and Vent Terminal
Clearances
LOCATION
CLEARANCE (FT)
U.S.A.
Canada
Above anticipated snow depth
1
1
Dryer vent
3
4
From plumbing vent stack
3
3
Gas appliance vent terminal and
chimney
4
4
From any opening where vent gases
could enter building
1
3
Above grade level
1
1
From combustion-air opening of any
appliance
1
6
From a fresh air intake
3*
6
From electric or gas meters, regula-
tors, and relief equipment
4†
6
Above grade when adjacent to public
walkway
7
7
* Three ft above an intake located within 10 ft.
† Horizontal distance.
If installing 2 or more 58EJB Furnaces refer to the Multiventing
and Vent Terminations section of this instruction.
Combustion air must NOT be taken from inside the structure
because that air frequently is contaminated by halogens,
which include fluorides, chlorides, bromides, and iodides.
These elements are found in aerosols, detergents, bleaches,
cleaning solvents, salts, air fresheners, adhesives, paint, and
other household products.
Maintain a minimum of 36 in. between combustion-air inlet
and clothes dryer vent.
Locate the combustion-air inlet as far as possible from the
swimming pool and swimming pool pump house.
When the vent pipe is exposed to temperatures below
freezing, such as when it passes through an unheated space or
when a chimney is used as a raceway, the pipe must be
insulated with 1/2-in. thick Armaflex-type insulation.
When the combustion-air pipe is installed above a suspended
ceiling, the pipe must be insulated with 1/2-in. Armaflex-type
insulation. The combustion-air pipe should also be insulated
when it passes through a warm, humid space.
Solvent cements are combustible. Keep away from heat,
sparks, and open flame. Use only in well ventilated areas.
Avoid breathing of the vapor and contact with the skin or
eyes. Failure to follow this warning could result in a fire,
property damage, personal injury, or death.
All combustion-air and vent pipes must be airtight and
watertight except top joint of the elbow on the combustion-air
inlet plate which must be left unglued to facilitate removal of
burners. The pipes must also terminate exactly as shown in
Fig. 6 or 7. Failure to follow this warning could result in
property damage, personal injury, or death.
NOTE:
The unit is shipped with a 3- to 2-in. bell reducer for units
where 3-in. combustion-air pipe is required.
NOTE:
Do not count the elbows to which the terminal bracket
attaches or any elbow between the bracket and the open end of the
pipe. (See Fig. 6 or 7.) Also, do not count pipe sections inside
furnace casing.
NOTE:
It is recommended that all pipes be cut, prepared, and
preassembled before permanently cementing any joint.
1. Attach PVC pipe to inducer housing outlet, run vent pipe
vertically for a short distance. Turn piping horizontally 90° to
allow installation of secondary vent drain before continuing
out of structure. (See Fig. 6 or 7.)
NOTE:
If 3-in. vent pipe is required, the 3- to 2-in. reducing
adapter provided must be used. Install the adapter as close to the
inducer housing outlet as possible.
2. Connect 90° elbow to combustion-air inlet plate with elbow
pointing upward. (See Fig. 8.) Do NOT cement the elbow to
the conbustion-air inlet plate since this joint must be unglued
to facilitate removal of burners during maintenance.
Fig. 7—Rooftop Termination (Preferred)
A91214
PVC TEE
VENT
COMBUSTION-AIR
(ELBOW WITH
AIR SPLITTER)
Z-SHAPED
TERMINATION
BRACKET
NOTE: HORIZONTAL VENT
RUNS MUST HAVE A
1
⁄
4
″
SLOPE TOWARD
THE FURNACE FOR
EVERY 12
″
OF PIPE
12
″
MIN ABOVE
ANTICIPATED MAX
SNOW LEVEL
12
″
MIN
24
″
MAX
NOTE: Z-SHAPED BRACKET
MUST BE INSTALLED
AS SHOWN TO
SECURE PIPES
PROPERLY
7
