Monessen Hearth HBDV300N/PSC7 User Manual

14

When using  twist lock pipe it is not necessary to use sealant on the joints. The only areas of the 
venting system that need to be sealed with high temperature silicone sealant are the sliding joints 
of any telescopic vent section used in the system.

To join twist lock pipes together, simply align the beads of the male end with the grooves of the fe-
male end, twisting the pipe until the flange on the female end contacts external flange on the male 
end. It is recommended that you secure the joints with three (3) sheet metal screws, however, this 
is not mandatory with twist lock pipe. Figure 14
To make it easier to assembly the joints, we suggest putting a lubricant (Vaseline or similar) on the 
male end of the twist lock pipe prior to assembly.

TWL100
Twist Lock Pipe
3/12/99   djt

Male End

Female End

Screw Holes

TWL100

The  Vent  Graph  should  be  read  in  conjunction  with  the 
following vent installation instructions to determine the re-
lationship between the vertical and horizontal dimensions 
of the vent system.
1.  Determine  the  height  of  the  center  of  the  horizontal 

vent pipe exiting through the outer wall.  Using this di-
mension on the Sidewall Vent Graph, Figure 15, locate 
the point intersecting with the slanted graph line. 

.  From the point of this intersection, draw a vertical line 

to the bottom of the graph.

3.  Select the indicated dimension, and position the fire-

place in accordance with same. 

exAMPle A: 
If the vertical dimension from the floor of the unit is 11’ (3.4 
m) the horizontal run to the face of the outer wall must not 
exceed 14’ (4.3 m).
exAMPle B: 
If the vertical dimension from the floor of the unit is 7’ (.1 
m), the horizontal run to the face of the outer wall must not 
exceed 6’ (1.8 m).
Refer to Page 21 for requirements for snorkels.

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eg: A

FP2291
vent graph

X

V

ertical Dimension from the Floor of Unit to the Center of 

the Horizontal V

ent Pipe

Horizontal Dimension From the Outside of Termination to 

the Back of the Fireplace

X = 9B\,” (753 mm) for 300 Models
X = 33Z\,” (841 mm) for 400 Models