Combustion-Air And Vent Pipe Connections - Carrier 58MVP Installation, Start-Up, And Operating Instructions Manual

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In Canada, construct all combustion-air and vent pipes %r this unit
of CSA or UL( listed schedule-40 PVC, PV(-DWV or ABS-
DWV pipe and pipe cement. SDR pipe is NOT approved in
Canada
NOTE: Furnace corubustion-air and vent pipe connections are
sized for 2-in. pipe. Any pipe size change should be made outside
fmnace casing in vertical pipe. (See Fig. 33.) This allows proper
drainage of vent condensate.
Combustion-air and vent pipes must tem_inate together in same
atmospheric pressure zone, either through roof or sidewall (roof
tem_ination preferred), using accessory termination kit.
See Table 6 for required clearances.
Furnace combustion-air and vent pipe connections must be at-
tached as shown in Fig. 34. Combustion-air intake plug fitting and
inducer housing alternate vent cap may need to be relocated in
some applications.
NOTE: Slope combustion-air and vent pipes a mininmm of 1/4
in. per linear ft with no sags between hangers.
MINOR PROPERTY DAMAGE
Failure to %llow this caution may result in water damage
from condensate dripping.
When combustion-air pipe is installed above a suspended
ceiling, pipe must be insulated with 3/8-in. thick Armaflex-
type insulation Combustion°air pipe should also be insulated
when it passes through a warn% humid space.
[NIT MAY NOT OPERATE
Failure to follow this caution may result in intem_ittent unit
operation.
When vent pipe is exposed to temperatures below fi'eezing,
such as when it passes through an unheated space or when a
chimney is used as a raceway, pipe must be insulated as
shown in Table 8 with Armaflex-type insulation
NOTS: Select 1 vent pipe connection and
1 combustion-air pipe connection
AIR
COMBUSTION-AIR
7 COMBUSTION-AIR
UPFLOW
COMBUSTION-
AIR
VSNT
HORIZONTAL-LEFT DISCHARGE
NOTE: Select 1 vent pipe connection and
1 combustion-aB pipe connection
COMBUSTION- _ COMBUSTION-
AIR AiR
AIR
FLOW
DOWNFLOW
COMBUSTION-
AiR
VENT
HORIZONTAL-RIGHT DISCHARGE
A96187
Fig. 34-=Combustion-Air and Vent Pipe
Connections
UNIT CORROSION HAZARD
Excessive exposure to contaminated combustion air may
result in safety and perfbt_nance related problems.
Combustion air must not be taken flora inside structure
because that air is fiequently contaminated by halogens,
which include fluorides, chlorides, bromides, and iodides.
These elements are fbund in aerosols, detergents, bleaches,
cleaning solvents, salts, air f?esheners, adhesives, paint, and
other household products Locate combustion-air inlet as far
as possible from swimming pool and swimming pool pump
house,
(
NOT IN
HORIZONTAL
SECTION
FURNACE
TRANSITION IN
VERTICAL SECTION
A93034
Fig. 33--Combustion-Air and Vent Pipe Diameter
Transition Location and Elbow Configuration
FIRE AND EXPLOSION HAZARD
Failure to follow this warning could result in fire, property
damage, personal ir_jury_ or death.
Solvent cements are combustible. Keep away ti'om heat,
sparks, and open flame. Use only in well ventilated areas.
Avoid breathing in vapor or allowing contact with skin or
eyes.
CARBON MONOXIDE POISONING HAZARD
Failure to follow this warning could result in property
damage, pe*sonal il_iu*y, or death.
All combustionoair and vent pipes must be airtight and
watertight. Pipes must also tem_inate exactly as shown in Fig.
37, 38, 39, 40, or 41.
NOTE: The minimum combustion=air and vent pipe lengd_ (each)
for these fhmaces is 5 ft, Short pipe lengths (5=8 ft) may discharge
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