Maximum Vent Length - Rinnai RU80i Manuel D'installation Et D'utilisation

Maximum vent length
Maximum vent length with concentric ven ng
1. Determine the number of 90 degree elbows in
the vent system. (Two 45 degree elbows count as
one 90 degree elbow.)
2. Refer to the table to find the maximum vent
length based on the number of elbows.
Number of
90° Elbows
0
1
2
3
4
5
6
3. Adjust switch No. 1 in the SW1 DIP switch (tan
switches) if required by the applicable note.
1 If the length is greater than 21 (6.4 m) then
move switch No. 1 (SW1) to OFF.
2 If the length is greater than 15 (4.6 m) then
move switch No. 1 (SW1) to OFF.
3 If the length is greater than 9 (2.7 m) then move
switch No. 1 (SW1) to OFF.
4 Move switch No. 1 (SW1) to OFF.
Example: If you have one elbow then your maximum
vent length is 35 feet (10.7 m). If your
actual length is greater than 15 (4.6 m)
then move switch no. 1 (SW1) to OFF.
NOTICE
If you have a longer vent length (see above), switch
No. 1 is required to be in the OFF posi on. This
ensures the water heater will run properly. Blocked
flue diagnos c codes and shutdowns may result if
switch No. 1 is not in the correct posi on.
10
Maximum vent length
(concentric ven ng)
41 (12.5 m) 1
35 (10.7 m) 2
29 (8.8 m) 3
23 (7.0 m) 4
17 (5.2 m) 4
11 (3.4 m) 4
5 (1.5 m) 4
Maximum vent length for Centrotherm 2 Pipe
InnoFlue Vent System (single wall SW, 3 inch
diameter)
Vent length using short radius elbow
Number of
90° Short
Radius
Elbows
0
1
2
Vent length using long radius elbow
Number of
90° Long
Radius
Elbows
0
1
2
3
4
5
6
7
KB Series Manual
Switch #1 in the tan
Maximum
Straight Vent
Length
If length is greater
18 (5.49 m) move
42 (12.80 m)
switch #1 to OFF
3 (0.91 m) move
27 (8.23 m)
switch #1 to OFF
12 (3.66 m) move switch #1 to OFF
Switch #1 in the tan
Maximum
Straight Vent
Length
If length is greater
21 (6.40 m) move
45 (13.72 m)
switch #1 to OFF
15 (4.57 m) move
39 (11.89 m)
switch #1 to OFF
9 (2.74 m) move
33 (10.06 m)
switch #1 to OFF
3 (0.91 m) move
27 (8.23 m)
switch #1 to OFF
21 (6.40 m)
15 (4.57 m)
move switch #1 to
OFF for any length
9 (2.74 m)
3 (0.91 m)
DIP switches
DIP switches