Monessen Hearth 624DV(ST Installation And Operating Instructions Manual page 22

Designer Series Gas Fireplaces
vERTICaL ThRouGh-ThE-RooF aPPLICaTIoNS
This Gas Fireplace has been approved for,
•
Vertical installations up to 40' (12 m) in height. Up to a 10' (3 m) horizontal vent run can be installed
within the vent system using a maximum of two 90° elbows. Figure 28
40' Maximum Height
8' Minimum Height
•
Up to two 45° elbows may be used within the
horizontal run. For each 45° elbow used on
the horizontal plane, the maximum horizontal
length must be reduced by 18" (450 mm).
Example: Maximum horizontal length
No elbows = 10' (3 m)
1 x 45° elbows = 8.5' (2.6 m)
2 x 45° elbows = 7' (2.1 m)
•
A minimum of an 8' (2.5 m) vertical rise is
required.
•
Two sets of 45° elbows offsets may be used within
the vertical sections. From 0 to a maximum of 8'
(2.5 m) of vent pipe can be used between elbows.
Figure 31
•
The maximum angular variation allowed in the
system is 270°. Figure 31
•
The minimum height of the vent above the high-
est point of penetration through the roof is 2' (610
mm).
22
10'
Maximum
Support Straps
Every 3'
Figure 30 -
Support Straps for Horizontal Runs
FP2308
support straps
40' Maximum Height
8' Minimum Height
1
2
3
4
Example: Elbow 1
Elbow 2
Elbow 3
Elbow 4
Total Angular Variation
Figure 31 -
Maximum Elbow Usage
vENTING INSTaLLaTIoN
10'
Maximum
Support Straps
Every 3'
FP2308
1
2
= 90°
3
= 45°
= 45°
4
= 90°
= 270°
FP2309
max elbow use A
FP2309
42D0200