Lochinvar 999 - 750, CF-CH(E)-i&s-08 Horizontal DirectAire Venting, Masonry Chimney Installation

Installation and Service Manual

Masonry Chimney Installation

A masonry chimney must be properly sized for the installation of a high efficiency gas-fired appliance. Venting of a high efficiency appliance into a cold or oversized masonry chimney can result in operational and safety problems. Exterior masonry chimneys, with one or more sides exposed to cold outdoor temperatures, are more likely to have venting problems. The temperature of the flue products from a high efficiency appliance may not be able to sufficiently heat the masonry structure of the chimney to generate proper draft. This will result in condensing of flue products, damage to the masonry flue/tile, insufficient draft and possible spillage of flue products into an occupied living space. Carefully inspect all chimney systems before installation.

WARNING: Do not vent this unit into a masonry chimney without a sealed stainless steel liner system. Any breaks, leaks, or damage to the masonry flue/tile will allow the positive-pressure flue products to leak from the chimney and into occupied living spaces. This could cause serious injury or death due to carbon monoxide poisoning and other harmful flue products.

IMPORTANT: Check with local code officials to determine code requirements or the advisability of using a masonry chimney with a sealed corrosion-resistant liner system.

Sidewall Vent Termination Clearances and Location

Follow all sidewall venting termination information for clearances and location under Sidewall Vent Termination Clearances and Location, page 12.

TABLE-E

Sidewall Vent Kits

Input	Kit*	Max. Vent		Vent	Max. Vent
Btu/hr	(w/Power	Length		Termination Only	Length
	Fan Assy.)			(399,999 - 750,000 Btu/hr)
399,999	SVK3006	100 ft.		SVK3043	50 ft.
500,000	SVK3006	100 ft.		SVK3043	50 ft.
650,000	SVK3008	100 ft.		SVK3044	50 ft.
750,000	SVK3008	100 ft.		SVK3044	50 ft.
990,000	SVK3009	100 ft.		N/A	N/A
1,260,000	SVK3010	100	ft.	N/A	N/A
1,440,000	SVK3010	100	ft.	N/A	N/A
1,800,000	SVK3012	100	ft	N/A	N/A
2,070,000	SVK3012	100	ft.	N/A	N/A

*These kits include a sidewall venter assembly, vent termination, and barometric damper.

4. Horizontal DirectAire™ Venting

IMPORTANT: Before installing a venting system, follow all venting clearances and requirements found in the Venting, General Information section, page 11.

The Horizontal DirectAire™ vent system is the same as the Sidewall Venting system, except it pulls combustion air from the outdoors through a sidewall air inlet. Follow all requirements in Sidewall Venting, page 19.

The Horizontal DirectAire™ vent system requires you to install two vent pipes directly to the unit; one pipe for flue products and one for combustion air. Install both vent pipes horizontally with a sidewall termination point. For this venting option, you must purchase the DV box accessory from the appliance manufacturer. The DV box attaches to the air inlet of the unit. The pipe for combustion air attaches to the DV box.

Make vent connection directly to the top of the unit. No additional draft diverter or barometric damper is required on single unit installations with a dedicated stack and a negative draft maintained between 0.04 to 0.08 inches w.c.

The Horizontal DirectAire™ combustion air supply system has specific vent material and installation requirements. The air inlet pipe connects directly to the boiler to supply combustion air. The combustion air inlet pipe is a dedicated system with one air inlet pipe per boiler. You must connect the air inlet pipe to a combustion air inlet cap as specified in this section.

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