6.7.4Recommended vent/air intake terminal position
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NOTICE
CAUTION
Terminals should be positioned as to avoid products of combustion entering openings into buildings or other vents.
Maintain 12” of clearance above the highest anticipated snow level or grade or, whichever is greater. Please refer to your local codes for the snow level in your area.
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CAUTION | The termination shall be at least 4 feet (1,220 mm) for the US and 6 feet (1,830 |
| mm) for Canada distance from electric meters, gas meters, regulators and |
| relief equipment. (for room air application only) |
NOTICE | Horizontal vent systems should always be installed sloping towards the |
boiler (min. 21 mm/m, 1/4 “/ feet), in order to avoid condensate retaining in | |
| the vent system. With the condensate running back to the boiler the risk of |
| ice forming at the terminal is reduced. |
NOTICE | The whole route of the vent system must be installed upwards, never |
| downwards, completely nor partly. |
NOTICE | Place pipe supports every 4 feet (1219 mm) of horizontal run, beginning with |
| the support near the boiler to prevent movement in fittings and allow boiler |
| to be free from any strain or weight on boiler or fittings. |
NOTICE | The terminal should be located where dispersal of combustion products is |
| not impeded and with due regard for the damage or discolouration that might |
| occur to building products in the vicinity (see fig 14 and 15). |
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| Approval Codes for Installation | |
Item Description | Flue Material | United States |
|
Plastic Vent and/or air | PVC Schedule 40 | ANSI/ASTM D1785 |
|
pipes and fittings | PVC - DWV | ANSI/ASTM D2665 |
|
| CPVC Schedule 40 | ANSI/ASTM F441 |
|
Plastic Pipe cement and | PVC | ANSI/ASTM D2564 |
|
primer | CPVC | ANSI/ASTM F493 |
|
| Item Description | Flue Material | Manufacturer | US/CAN |
| Flue system |
| Stainless steel vent |
|
|
| concentric | |
| systems | Heat Fab | UL1738 | twin pipe | ||
| Plastic Vent and/or air |
|
|
|
| Rolux Condensing |
| pipes and fittings | PPS | Ubbink |
|
| Vent System |
Approval codes for installation of venting system |
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|
| table 7 | ||
Installation & Servicing Instructions Rinnai
30
12" (300 mm) |
| |
minimum | 12" (300 mm) | |
| minimum | |
EXHAUST |
| |
INTAKE | 12" (300 mm) | |
|
| minimum |
12" (300 mm) |
| 12" (300 mm) |
minimum |
| minimum |
|
| |
Terminal positions PVC |
| figure 15 |
| Fittings or Piping Equivalent |
| |
|
| feet | m |
| 45 degree elbow | 3 | 0.91 |
| 90 degree elbow | 6 | 1.83 |
| plastic pipe per foot | 1 | 0.30 |
| concentric vent kit | 3 | 0.91 |
Equivalent friction loss of PVC/CPVC | table 8 | ||
