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PVC 90°ELBOW | ||||
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A
NOT IN HORIZONTAL SECTION
FURNACE
PIPE DIAMETER
TRANSITION IN
VERTICAL SECTION
A93034
LOOSE PARTS BAG)
A96211
LENGTH OF STRAIGHT PIPE PORTION OF
COMBUSTION-AIR INLET PIPE ASSEMBLY (IN.)
CASING WIDTH | A |
21 | |
12 ± 1/2 | |
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Fig. 29ÐCombustion-Air Inlet Pipe Assembly
NOTE: Do not attach
The
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
| HOUSING | ||
| PLUG | ||
| INTAKE HOUSING | ||
3/8″ ID TUBE | |||
BURNER | |||
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| BOX | |
3/16″ |
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DRILL |
| COMBUSTION– | |
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| AIR PIPE | |
| 4″ |
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TRAP | MIN |
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TO OPEN |
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| DRAIN |
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| A96190 |
Fig. 31ÐVent Pipe Diameter Transition Location and
Elbow Configuration
Determine vent pipe diameter and maximum pipe lengths using Table 4.
Furnace vent pipe connection must be attached as shown in Fig.
28.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.
CAUTION: 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 5 with
WARNING: Vent pipes must be airtight and watertight. Failure to follow this warning could result in property damage, personal injury, or death.
NOTE: The minimum vent pipe length for these furnaces is 5 ft. Short pipe lengths
NOTE: Do not count elbows or pipe sections in terminations or within furnace. See shaded areas in Fig. 34.
EXAMPLE:
An 036080 size furnace located in Indianapolis, eleva- tion 650 ft above sea level, could be installed in an application requiring 3 elbows and 32 ft of vent pipe. Table 4 indicates this application would allow a
Fig. 30ÐIntake Housing Plug Fitting Drain
C.Vent Pipe
NOTE: Furnace vent pipe connections are sized for
Install vent pipe as follows:
1.Determine location of vent pipe connection to inducer housing as shown in Fig. 28 for application.
→2. Reposition elastomeric (rubber) inducer housing outlet cap and clamp to appropriate unused inducer housing connec- tion. Tighten clamp.
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