Initial Installation
QUALIFIED INSTALLERS ONLY
VENT CONFIGURATIONS AND RESTRICTOR SETTINGS:
Figure 28 and 29 shows the range of possible vent configurations if the unit is top vented, for vertical and horizontal terminations, any layout that remains within the grid areas is acceptable. They also show the vent restrictor required, relative to the length of vent pipe. Longer vertical vent lengths necessitate greater restriction.
Having the fewest number of elbows is ideal, as they tend to disrupt air movement. Using 45˚ elbows is preferable to using 90˚ elbows. Also, a shorter vent system will perform better than a longer one.
If the unit is rear vented it may have a maximum horizontal run of 36” (91.4 cm) and must be used with a 36” (91.4 cm) snorkel termination.
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| 36 |
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| 34 |
| 60% RESTRICTOR |
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| 32 |
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of Unit) | 30 |
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28 |
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26 |
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Top | 24 |
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(From | 22 |
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20 |
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Vent |
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18 |
| 50% RESTRICTOR |
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of | 16 |
| UP TO 4 ELBOWS |
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Feet |
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14 |
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Vertical | 12 |
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10 |
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| UP TO 2 ELBOWS |
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| NO RESTRICTOR |
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| 1 ELBOW |
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| NO RESTRICTOR |
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| 0 | 4 | 6 | 8 | 10 | 12 | 14 | 16 | 18 | 20 |
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Horizontal Feet of Vent
NOTE: For best results, 3' (76.2cm) or more of vertical rise is recommended.
Figure 28: Possible Vent Configurations for Top Vented;
Vertical and Horizontal Terminations with Elbows.
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| 38 |
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| 36 |
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| 34 |
| 75% RESTRICTOR |
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| 32 |
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Unitof | 30 |
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26 |
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Top | 28 |
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24 |
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From |
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22 |
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Vent | 20 |
| 70% RESTRICTOR |
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of | 16 |
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Feet |
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1250% RESTRICTOR
10
8
6
4NO RESTRICTOR
2
0
Figure 29: Possible Vent Configurations for Top Vented; Straight Vertical Vent & Terminations.
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