Lochinvar WH 55-399 operation manual Optional room air, Air contamination

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. —OR—

•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

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