Reznor SDH Option - Installation - Venting Instructions - Manual (Page 2)

Form I-SDH-V, P/N 211410 R5, Page 2
1. Type of Pipe
All pipe is field supplied. Requirements are listed for both the vent pipe and the com-
bustion air inlet pipe. Terminal vent pipe requirements vary depending on whether the
vent terminal is horizontal or vertical.
Venting
Requirements
2. Pipe Diameter and
Length
Pipe diameter and length requirements listed in TABLE 1 are for the indoor sections of
pipe between the heater and the concentric adapter box.
TABLE 1 - Pipe
Diameter and Length
from Heater to
Concentric Adapter Box
• Minimum length
between the heater and
the concentric adapter
box is 3 ft (914mm).
3. Venter Outlet and
Combustion Air
Inlet
TABLE 3 - Diameter of
the Venter Outlet and
Combustion Air Inlet
TABLE 2 - Diameters
of Outdoor Concentric
Terminal Pipes
The outdoor lengths depend on the
installation; requirements are listed
in the installation instructions for the
horizontal terminal (Option CC6) and
vertical terminal (Option CC2) vent/
combustion air kits.
Pipe diameters and maximum indoor vent lengths in TABLE 1 apply to both horizontal and vertical vent/combustion
air systems. Add all straight sections and equivalent lengths for elbows. The total length of the straight sections and
elbows must not exceed the Maximum Length.
Diameters of the outside (terminal) concentric pipes are listed in
TABLE 2.
Special Requirements at the Heater
Connections
• Size 250 - A 6” to
5” (152 to 127mm)
taper-type reducer
is required at the
venter outlet.
• Sizes 200, 225, 250, 300, 350, and
400A require a minimum of 12” (305
mm) of straight pipe at the heater
connections.
Taper-
type
Pipe
Diameter
Reducer
Airflow
NOTE: Clearance from
vent connection must be
18” (457mm).
Pipe Diameter & Maximum Pipe Length from the Heater to the Concentric Adapter Box
Cabinet
Size
SDH
Pipe Diameter Maximum
Length
Equivalent Straight Length for a
Vent Pipe Inlet Air Pipe 90° Elbow 45° Elbow
inches mm inches mm feet M feet M feet M
A
75 4 102 4 102 25 7.6 3 0.9 1.5 0.5
100 4 102 4 102 35 10.7 4 1.2 2 0.6
B
125 4 102 4 102 35 10.7 4 1.2 2 0.6
150 5 127 5 152 30 9.1 3 0.9 1.5 0.5
C
175 5 127 6 152 30 9.1 3 0.9 2 0.5
200 5 127 6 152 40 12.2 4 1.2 2 0.6
225 5 127 6 152 40 12.2 4 1.2 2 0.6
D
250 5 127 6 152 40 12.2 4 1.2 2 0.6
300 6 152 6 152 45 13.7 4 1.2 2 0.6
E
350 6 152 6 152 45 13.7 5 1.5 2.5 0.8
400A 6 152 6 152 45 13.7 5 1.5 2.5 0.8
Heater Connections (diameter)
Cabinet
Size
SDH
Size
Venter Outlet Inlet Air Collar
inches mm inches mm
A 75, 100 4 102 4 102
B
125 4 102 4 102
150 5 127 5 127
C
175,
200, 225
5 127 6 152
D 250, 300 6 152 6 152
E
350,
400A
6 152 6 152
Horizontal or
Vertical Vent
Pipe Run
Vent pipe approved for a Category III appliance OR single-wall, 26-gauge or heavier galvanized
(or a material of equivalent durability and corrosion resistance) vent pipe is required between
the heater and the concentric adapter box.
Horizontal Vent
Terminal (using
Option CC6 Kit)
Vent pipe approved for a Category III appliance OR single-wall, 26-gauge or heavier galvanized
(or a material of equivalent durability and corrosion resistance) vent pipe is required for the
horizontal vent terminal section. The length of vent pipe that extends through the box and
runs concentric through the combustion air pipe must be one-piece with no joints.
Vertical Vent
Terminal (using
Option CC2 Kit)
Double-wall (Type B) vent pipe is required for the vertical vent terminal section. The length
of vent pipe that extends through the box and runs concentric through the combustion air pipe
must be one-piece with no joints.
Combustion Air
Inlet Pipe
Sealed, single-wall galvanized pipe is recommended for vent run and terminal combustion air
pipe.
Model SDH
Diameters of Concentric
(outdoor) Terminal Pipes
Inlet Air Pipe Vent Pipe
75, 100, 125 6” (152mm) 4” )102mm)
150, 175, 200, 225,
250, 300, 350, 400A 8” (203mm) 5” (127mm)