Lochinvar CF-CH(E)-i&s-08, 999 - 750, 399 service manual Vent Kits, Direct Venting

Hydronic Heating Boilers and Domestic Water Heaters

INSTALLATION Continued

FIG. 23A Horizontal DirectAire Installation (Illustration with Sidewall Venter and Sidewall Combustion Air)

Combustion air supplied from outdoors must be free of contaminants (see Combustion and Ventilation Air, page 8).

Vent Kits

You must order the Horizontal DirectAire™ Vent Kit for sidewall installation from the appliance manufacturer. See TABLE–F for kit numbers. Each kit includes a sidewall powered vent cap fan, proving switch, controls, combustion air inlet cap to supply air to a single unit, the transition adapter to attach the field supplied single wall air inlet pipe to the unit and installation instructions. Purchase flue pipe and air inlet pipe locally.

The sidewall air inlet cap supplied in the Horizontal DirectAire™ Vent Kit is used to supply combustion air to a single boiler. Combustion air supply pipes from multiple units can not be combined into a single air inlet pipe and inlet point.

WARNING: Only use the sidewall air inlet cap recommended by the appliance manufacturer. Using another sidewall air inlet cap may result in operational problems and the spillage of flue products. Spillage of flue products can cause personal injury or death due to carbon monoxide poisoning.

Venting of Flue Products

For venting flue products horizontally, follow all requirements in the installation instructions for sidewall venting.

Termination point for the flue products must follow the clearance requirements in Sidewall Venting Termination, page 19.

For proper operation, a barometric damper is provided for Horizontal DirectAireTM installations. The damper will help to ensure a draft between negative 0.04 to 0.08 inches w.c.

TABLE–E

TABLE-F

Horizontal DirectAire™ Kits

Input

Btu/hr Kit*

399,999 HDK3031

500,000 HDK3031

650,000 HDK3032

750,000 HDK3032

990,000 HDK3026

1,260,000 HDK3027

1,440,000 HDK3027

1,800,000 HDK3028

2,070,000 HDK3028

*These kits include a sidewall venter assembly, vent termination, DV box adapter, sidewall air inlet cap, and a barometric damper.

5. Direct Venting

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

This option uses sealed AL29-4C vent materials for the flue outlet piping and separate combustion air inlet piping. This system terminates both the flue and combustion air inlet in the same pressure zone. The flue outlet and combustion air intake may terminate at either a sidewall or the rooftop.

To use the optional Direct Vent system, you must install specific vent kits and venting materials. The following is a detailed explanation of Direct Vent installation requirements, including the components used and vent kit part numbers.

Flue Outlet Piping

Venting Guidelines

If using this venting option, a sealed AL29-4C venting system for flue products is required on all models of this appliance. This venting system operates with a positive pressure in the vent. The internal combustion air blowers generate this positive pressure which operates the combustion process and also exhausts the flue products from the building.

This vent system has specific vent material and installation requirements. Only use listed sealed AL29-4C vent system materials. Follow all installation requirements. See TABLE–B, page 13 for proper pipe size for your unit. A list of sealed AL29-4C flue pipe manufacturers is located on page 24.

Seal all vent joints and seams gas-tight.

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