35-DVRS31N
19
Installation Instructions Cont.
Venting Chart
Maximum Venting Lengths
Maximum
Total Venting
:
45’
Maximum
Vertical Vent
:
35’
Maximum
Horizontal Vent
:
20’ **
** Min 7’ vertical vent rise required for max
horizontal vent
Venting Examples
Example A:
3ft vertical rise / 1 90˚ elbow / 6ft Horizontal
Use No restriction.
Example B:
6ft vertical rise / 1 90˚ elbow / 10ft Horizontal
Use restrictor setting No.1.
Example C:
17ft vertical rise / 1 90˚ elbow / 5ft horizontal
Use restrictor setting No.2.
Maximum Elbows
Total Elbows in vent
5
Max Horizontal permitted
3
Note: if more than 1 90˚ elbow is used horizontally
the maximum horizontal is reduced by 1ft.
Example B:
If to reach the desired termination at point ‘B’ you
use 2 90˚ elbows, you would be required to reduce
the maximum horizontal to 8ft.
If 3 90 ˚ elbows were used to reach point ’B’, the
maximum horizontal would be reduced to 7ft.
The above examples are provided as a median . The restrictor has numerous positions to balance
the vent and some adjustment may be required to find the ideal flame pattern.
Flame picture should be checked to insure correct restrictor setting is used.
See above vent charts for allowable installations.
Fig 19-A
35
30
25
20
C
15
10
5
B
A
0 5 10 15 20
Restrictor
Setting #3
Restrictor
Setting #2
Restrictor
Setting #1
