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

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
F628
F656
F891
COMBUSTION-
AIR
VENT
AIR
FLOW
HORIZONTAL-LEFT DISCHARGE
Fig. 27—Combustion-Air and Vent Pipe
Connections
Vent Pipe
NOTE: Furnace vent pipe connections are sized for 2-in. pipe.
Any vent pipe size change should be made outside furnace casing
in vertical pipe. (See Fig. 26.) This allows proper drainage of vent
condensate. Furnace shall not be connected to any vent or chimney
flue servicing another heating device.
Determine vent pipe diameter and maximum pipe lengths using
Table 7.
Furnace vent pipe connection must be attached as shown in Fig.
27. Inducer housing alternate vent cap may need to be relocated in
some applications.
NOTE: Starting at furnace, slope vent pipe a minimum of 1/4 in.
per linear ft upward to termination(s) with no sags between
hangers.
UNIT MAY NOT OPERATE
Failure to follow this caution may result in intermittent unit
operation.
When 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, pipe must be insulated as
described in Table 8 with Armaflex-type insulation.
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 —
For CPVC — —
ABS Pipe —
For PVC — —
PVC Pipe —
COMBUSTION-
VENT
AIR
FLOW
HORIZONTAL-RIGHT DISCHARGE
A04162
—
—
Solvent
Cement
—
—
—
Solvent
Cement
—
—
—
—
—
Solvent
Cement
—
Primer
—
CARBON MONOXIDE AND PROPERTY DAMAGE
HAZARD
Failure to follow this warning could result in property
AIR
damage, personal injury, or death.
Vent pipes must be airtight and watertight.
NOTE: The minimum vent pipe length for these furnaces is 5 ft.
Short pipe lengths (5-8 ft) may discharge water droplets. These
droplets may be undesirable, and a 12-in. minimum offset pipe
section is recommended to reduce excessive droplets from exiting
vent pipe outlet. (See Fig. 29.)
NOTE: Do not count elbows or pipe sections in terminations or
within furnace.
EXAMPLE:
An 080-12 size furnace located in Indianapolis, elevation
650 ft above sea level, could be installed in an application
requiring 3 elbows and 32 ft of vent pipe. Table 7 indicates
this application would allow a 2-in. diameter vent pipe. At
0-2000 ft elevation, 2-in. pipe is good for up to 35 ft with
3 elbows. If same installation were in Albuquerque, eleva-
tion 5250 ft above sea level, installation would require 2-1/2
in. vent pipe. At 5001- to 6000-ft elevation, 2-in. pipe is
allowed for up to 23 ft with 3 elbows, but 2-1/2 in. pipe can
be used for up to 70 ft with 3 elbows.
Install vent pipe as follows:
1. Determine location of vent pipe connection to inducer housing
as shown in Fig. 27 for application.
2. Reposition elastomeric (rubber) inducer housing outlet cap
and clamp to appropriate unused inducer housing connection.
Tighten clamp.
25
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
Cellular Core DWV at Schedule-40 IPS sizes
For PVC
Cellular Core Schedule-40 & DWV