Nordyne RC 92+, RL 90+ installation instructions Upflow Furnaces, Downflow Furnaces, Vent Table

APPLICATION	SINGLE PIPE LENGTH (ft.)			DIRECT VENT, DUAL PIPE LENGTH (ft.)
	with 1 long radius elbow*			with 1 long radius elbow on each pipe*
PVC,CPVC or ABS	Outlet	Outlet	Inlet/Outlet			Inlet/Outlet		Inlet/Outlet
SCH. 40 Pipe Size	2”	3”	2”		2”	3”	2”	3”	3”
Models 040	80	150	40		40	50	50	90	90
Models 060 & 080	60	150	30		30	35	35	90	90
Models 100 & 120	30	150	15		15	25	25	90	90

**NOTES

1.Subtract 2.5 ft. for each additional 2” long radius elbow, 5 ft. for each additional 2” short radius elbow, 3.5’ for each additional 3” long radius elbow, and 7’ for each additional 3” short radius elbow.

2.Two 45 degree elbows are equivalent to one 90 degree elbow.

3.Do not include termination elbows in calculation of vent length

4.This table is applicable for elevations from sea level to 2000 ft. For higher elevations decrease vent pipe lengths by 8% per 1000 ft. of altitude.

5.Only the above pipe materials are approved for use with these condensing furnaces.

Table 5. Vent Table

Upflow Furnaces

Inlet	Exhaust	See Vent Table 5
5/8"				Seal/Caulk
		Straps or Other Suitable		around Pipe
		Supports at Minimum of 5 ft. Intervals		at Building
Combustion				90˚ Elbow
Offset with
Exhaust Pipe
for Adequate
Dimensional		Upward Pitch - 1/4" per Foot		12" Min.
Clearance
PVC or		Outlet Exhaust Vent		7"
		First Support Placed
ABS Pipe
		as Close to Furnace	Wall
		Connection as Possible		Normal Snow Level
		Exhaust Vent
Straight Neoprene Coupling
with 2 Hose Clamps*
(Optional - Not Shown)

Downflow Furnaces

Seal/Caulk around Pipe at Building

90˚ Elbow

12" Min.

See Vent Table 5

Straps or Other Suitable

Supports at Minimum of 5 ft. Intervals

Upward Pitch - 1/4" per Foot

Outlet Exhaust Vent

Exhaust Inlet 5/8"

Combustion Air

Inlet

Offset with Exhaust

Pipe for Adequate

Dimensional

Clearance

		First Support Placed
	Wall	as Close to Furnace
		Connection as Possible
Normal Snow Level
		Exhaust Vent

PVC or

ABS Pipe

Straight Neoprene Coupling with

2 Hose Clamps*

*These neoprene couplings are field-supplied and can be used if the installation requires breakable connections in the piping. Note that a maximum of two couplings per pipe are allowed.

Figure 16. Horizontal Venting

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