Lochinvar 51-211 operation manual Optional room air, Air contamination, Model Kit Number

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

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.

	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 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

￿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 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:

• Remove contaminants permanently.

—OR—

￿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.

• Relocate air inlet and vent

terminations to other areas.

Table 3C Optional Room Air Kit

Model	Kit Number
51 - 106	KIT30051
151 - 211	KIT30052

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