Model LG & LD Pool and Spa Heater | Page 3 |
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Notes:
1.An Underwriters' Laboratories listed vent cap is required to prevent downdraft and allow the heater to function properly and safely.
2.Use approved roof jack.
Figure 2. Indoor Installation Venting (USA), or Outdoor Shelter (Canada).
Table 1. Air Openings to Outside.
Required Net Free Open Area for Combustion Air Openings
| Direct from outside | Duct from outside | ||
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Model | in2 | (cm2) | in2 | (cm2) |
125 | 32 | (206) | 64 | (413) |
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175 | 44 | (284) | 88 | (568) |
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250 | 63 | (406) | 126 | (813) |
325 | 82 | (429) | 164 | (1058) |
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400 | 100 | (645) | 200 | (1290) |
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Note: If using screens and/or louvers, compensate by adding 50% additional area to each opening.
When a drafthood is used, it must be connected to a vent pipe which stops at least 2 feet (0.61 meters [m]) above the highest point of the roof or other object that is within 10 feet (3.05 m) from the vent termina- tion. The vent pipe must have a listed vent cap which allows a full equivalent opening for flue products (see Figure 2).
2C. Site Location
WARNING
Improper installation or maintenance can cause nausea or asphyxiation from carbon monoxide in flue gases which could result in severe injury, or death.
2C-1. Installation Information
Avoid placing the heater in locations where it can cause damage by water or condensate leakage. If this is not possible, provide a suitable drain pan to catch and divert any leakage. The pan must not block natural flow of air around the heater.
Locate the heater so the clearances from combus- tible surfaces shown in Table 2 are met.
Table 2. Minimum Heater Clearances From Combustible Surfaces
| Indoor (Outdoor Shelter) Installation |
| Outdoors Installation | |||||
| U.S. |
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| Canada |
| U.S. |
| Canada |
Side of Heater | inch | (cm ) | inch | ( cm ) | inch | (cm ) | inch | (cm ) |
Blank | 6 | (15.2 ) | 6 | (15.2 ) | 6 | ( 32 ) | 6 | (15.2 ) |
Rear | 6 | (15.2 ) | 6 | (15.2 ) | 6 | ( 32 ) | 6 | (15.2 ) |
Piping | 12 | (30.5 ) | 18 | (45.7 ) | 12 | (30.5) | 18 | (45.7 ) |
Top | 44 | (111.7 ) | 44 | (111.7 ) |
| Open Unroofed Area | ||
Front | 18 | (45.7 ) | 36 | (91.4 ) | 18 | (45.7 ) | 36 | (91.4 ) |
