Enviro VENTED GAS FIREPLACE HEATER 用户手册

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23
Initial Installation
QUALIFIED INSTALLERS ONLY
Vertical
Termination
Storm Collar
Flashing
Roofing nails
Elbow Strap
elbow strap down to the roof level, as shown in Figure 30. Tighten the clamp around the pipe section. 
Use a level to make sure the pipe is truly vertical. With roofing nails, secure the support straps to the 
roof. Seal the nails holes heads with non-hardening mastic. Trim the excess length of the support 
straps that extend out beyond the edge of the flashing.
7.  Slip the flashing over the pipe section protruding through the roof. Secure the base of the flashing to 
the roof with roofing nails. Use a non-hardening sealant between the uphill edge of the flashing and 
the roof. Insure the roofing material overlaps the top edge of the flashing as shown in Figure 30. Verify 
that you have at least the minimum clearance to combustibles at the roof line.
8.  Continue  to  add  pipe 
sections until the height 
of  the  vent  cap  meets 
the 
minimum 
code 
requirements.  Refer  to 
Figure  31  and  Table  5. 
Note that for steep roof 
pitches,  the  vent  height 
must  be  increased.  In 
high  wind  conditions, 
nearby  trees,  adjoining 
roof lines, steep pitched 
roofs,  and  other  similar 
factors  can  result  in 
poor  draft,  or  down 
drafting. In these cases, 
increasing 
the 
vent 
height  may  solve  the 
problem.
Figure 30: Vertical Vent Termination Installation.
Table 5: Minimum ‘H’ for Figure 31.
Roof Pitch
Minimum Height
Feet
Meters
Flat to 7/8
1
0.3
Over 7/12 to 8/12
1.5
0.46
Over 8/12 to 9/12
2
0.61
Over 9/12 to 10/12
2.5
0.76
Over 10/12 to 11/12
3.25
0.99
Over 11/12 to 12/12
4
1.22
Over 12/12 to 14/12
5
1.52
Over 14/12 to 16/12
6
1.83
Over 16/12 to 18/12
7
2.13
Over 18/12 to 20/12
7.5
2.29
Over 20/12 to 21/12
8
2.44
Figure 31: Height of Vertical Termination; 
Reference Table 5. 
9. Slip the storm collar over the pipe, and push it down 
to the top of the roof flashing as shown in Figure 
30. Use the non-hardening sealant around the joint 
between the pipe and the storm collar.
10. Twist-lock the vent cap.