Carrier 58MXA Installation, Start-Up, And Operating Instructions Manual page 25

VENT PIPE
HORIZONTAL TO ROOF
COMBUSTION-AIR PIPE
VERTICAL TO ROOF
Table 6—Approved Combustion-Air and Vent Pipe, Fitting and Cement Materials
ASTM SPECIFICATION
MATERIAL PIPE FITTINGS SOLVENT CEMENT AND PRIMERS
(MARKED ON MATERIAL)
D1527
D1785
D2235
D2241
D2466
D2468
D2564
D2661
D2665
F438
F441
F442
F493 For CPVC
F628
F656
F891
NOTE: Do not attach combustion-air intake pipe permanently to
combustion-air intake housing since it may be necessary to remove
pipe for service of ignitor or flame sensor.
COMBUSTION-AIR INTAKE HOUSING PLUG FITTING
The combustion-air intake plug fitting must be installed in unused
combustion-air intake housing. This fitting must be attached by
12 " MIN
COMBUSTION-AIR PIPE
12 " MIN
NOTE: A 12 In. minimum offset pipe section is recommended with
short (5 to 8 ft) vent systems. This recommendation is to reduce
excessive condensate droplets from exiting the vent pipe.
Fig. 34—Short Vent (5 to 8 Ft) System
ABS Pipe —
PVC Pipe —
For ABS — —
PVC Pipe —
PVC — Fittings
ABS — Fittings
For PVC — —
ABS Pipe Fittings
PVC Pipe Fittings
CPVC — Fittings
CPVC Pipe —
CPVC Pipe —
— —
ABS Pipe —
For PVC — —
PVC Pipe —
12 " MIN
VENT PIPE
HORIZONTAL TO SIDEWALL
COMBUSTION-AIR PIPE
VENT PIPE
VERTICAL TO SIDEWALL
—
—
Solvent
Cement
—
—
—
Solvent
Cement
—
—
—
—
—
Solvent
Cement
— Cellular Core DWV at Schedule-40 IPS sizes
Primer
—
using RTV sealant, or by drilling a 1/8-in. hole in fitting, using
hole in intake housing as a guide. Install a field-supplied No. 6 or
No. 8 sheet metal screw.
NOTE: DO NOT OVERTIGHTEN SCREW. Breakage to intake
housing or fitting may cause air leakage to occur.
A plugged drain connection has been provided on this fitting for
use when moisture is found in combustion-air intake pipe and
combustion box.
25
COMBUSTION-AIR PIPE
12 " MIN
VENT PIPE
DESCRIPTION
Schedule-40
Schedule-40
For ABS
SDR-21 & SDR-26
Schedule-40
Schedule-40
For PVC
DWV at Schedule-40 IPS sizes
DWV
Schedule-40
Schedule-40
SDR
For CPVC
For PVC
Cellular Core Schedule-40 & DWV
A96230