3 General venting
Optional room air
NOTICE | Optional room air is intended for | |
commercial applications. Combustion air | ||
| ||
| piping to the outside is recommended for | |
| residential applications. |
Commercial applications utilizing the Knight wall mount boiler may be installed with a single pipe carrying the flue products to the outside while using combustion air from the equipment room. In order to use the room air venting option the following conditions and considerations must be followed.
• The unit MUST be installed with the appropriate |
room air kit (Table 3C). |
• The equipment room MUST be provided with |
properly sized openings to assure adequate |
combustion air. Please refer to instructions provided |
with the room air kit. |
• There will be a noticeable increase in the noise level |
during normal operation from the inlet air opening. |
• Using the room air kit makes the unit vulnerable |
Installation & Operation Manual
Air contamination
Pool and laundry products and common household and hobby products often contain fluorine or chlorine compounds. When these chemicals pass through the boiler, they can form strong acids. The acid can eat through the boiler wall, causing serious damage and presenting a possible threat of flue gas spillage or boiler water leakage into the building.
Please read the information given in Table 1A, page 10, listing contaminants and areas likely to contain them. If contaminating chemicals will be present near the location of the boiler combustion air inlet, have your installer pipe the boiler combustion air and vent to another location, per this manual.
WARNING | If the boiler combustion air inlet is located |
| in a laundry room or pool facility, for |
| example, these areas will always contain |
| hazardous contaminants. |
| to combustion air contamination from within |
| the building. Please review Section 1, Prevent |
| Combustion Air Contamination, to ensure proper |
| installation. |
• | Vent system and terminations must comply with the |
| standard venting instructions set forth in this manual. |
WARNING
To prevent the potential of severe personal injury or death, check for areas and products listed in Table 1A, page 10 before installing the boiler or air inlet piping.
If contaminants are found, you MUST:
WARNING
When utilizing the single pipe method, provisions for combustion and ventilation air must be in accordance with Air for Combustion and Ventilation, of the latest edition of the National Fuel Gas Code, ANSI Z223.1, in Canada, the latest edition of CGA Standard B149 Installation Code for Gas Burning Appliances and Equipment, or applicable provisions of the local building codes.
•Remove contaminants permanently.
•Relocate air inlet and vent terminations to other areas.
Table 3C | Optional Room Air Kit |
| ||
|
|
|
| |
| Model | Vent Size | Kit Number | |
| 55 - 110 | 2" | KIT30051 | |
| 55 - 285 | 3" | KIT30052 | |
| 199 - | 399 | 4" | KIT30053 |
18 
