Desa (V)3612ST Installation And Operating Instructions Manual page 11

VENTING INSTALLTION
Continued
WARNING: Do not operate an unvented gas log
set in this fireplace with the chimney removed.
RTL-12D RTL-12D
Storm
Collar
Flashing
MINIMUM
Firestop
HEIGHT
15 FT.
Spacer
(4.5m)
30° Offset/
Return
Figure 24 - Maximum Chimney Height
115603-01A
STL-12D
MAXIMUM
HEIGHT
CHASE
TERMINATION
40 FT.
(12m)
Firestop
Spacer
30°
Firestop
Spacer
For more information, visit www.desatech.com
For more information, visit www.desatech.com
FINISHING YOUR CHIMNEY SYSTEM
Maximum Chimney Height (Cont.)
Chimney Maintenance
Have your chimney system cleaned and inspected regularly to
ensure safe and efficient operation.
Using Figure 24 and the roof opening chart below, determine the
opening that will be required for the pitch of your particular roof.
Roof Opening Chart
PITCH Opening "A"
(degrees) Max. (inches)
FLAT
0-6/12
(26.6 deg. Slope)
6/12-12/12
(56.3 deg. Slope)
19" Min.
(48.26cm)
2" Min.
(5.08cm)
2" Min.
(5.08cm)
Figure 25 - Roof Opening
Before cutting hole, temporarily remove shingles around area to be
opened. After preparing the opening on the roof, continue to add
sections of pipe until it extends a minimum of 30 inches above
highest point of roof cutout (see Figure 25).
With the termination, the minimum height should add up to 3 feet
(see 10-Foot Rule and Figure 22, page 10).
Chimney Maintenance
Use Flashing
Model Number
19 V6F-10DM
23 /
1 V6F-10DM
4
30 / V12F-10DM
3
4
2" Min.
(5.08cm)
Opening
A
11
11
30" Min.
(76.2cm)