Lochinvar 999 - 750, CF-CH(E)-i&s-08 Outdoor Vent/Air Inlet Location, The Outdoor Vent Cap Kit

Installation and Service Manual

WARNING: Only install outdoor models outdoors and only use the vent cap supplied by the appliance manufacturer. Personal injury or product damage may result if any other cap is used or if an outdoor model is used indoors. Properly install all covers, doors and jacket panels to ensure proper operation and prevent a hazardous condition.

Combustion air supply must be free of contaminants (see Combustion and Ventilation Air, page 8). To prevent recirculation of the flue products into the combustion air inlet, follow all instructions in this section.

Outdoor Vent/Air Inlet Location

Keep venting areas free of obstructions. Keep area clean and free of combustible and flammable materials. Maintain a minimum clearance of 3" (76mm) to combustible surfaces and a minimum of 3" (76mm) clearance to the air inlet. To avoid a blocked air inlet or blocked flue condition, keep the outdoor cap air inlet, flue outlet and drain slot clear of snow, ice, leaves, debris, etc.

Do not install outdoor models directly on the ground. You must install the outdoor unit on a concrete, brick, block, or other non-combustible pad.

Do not locate unit so that high winds can deflect off of adjacent walls, buildings or shrubbery causing recirculation. Recirculation of flue products may cause operational problems, bad combustion or damage to controls. Locate unit at least 3 feet (0.91m) from any wall or vertical surface to prevent wind conditions from affecting performance.

Multiple unit outdoor installations require 48" (1.22m) clearance between each vent cap. Locate outdoor cap at least 48" (1.22m) below and 48" (1.22m) horizontally from any window, door, walkway or gravity air intake.

Locate unit at least 10 feet (3.05m) away from any forced air inlet.

Locate unit at least 3 feet (0.91m) outside any overhang.

Clearances around outdoor installations can change with time. Do not allow the growth of trees, shrubs or other plants to obstruct the proper operation of the outdoor vent system.

Do not install in locations where rain from building runoff drains will spill onto the unit.

Outdoor Vent Cap Kits

TABLE-H

Outdoor Vent Cap Kits

	Kit*	Kit*
Input	without	with
Btu/hr	Pump Cover	Pump Cover
399,999	ODK3748	ODK3052
500,000	ODK3748	ODK3052
650,000	ODK3749	ODK3053
750,000	ODK3749	ODK3053
990,000	ODK3036	ODK3049
1,260,000	ODK3064	ODK3065
1,440,000	ODK3037	ODK3050
1,800,000	ODK3038	ODK3051
2,070,000	ODK3038	ODK3051

* These kits include an outdoor vent cap and gasket.

Flue gas condensate can freeze on exterior walls or on the vent cap. Frozen condensate on the vent cap can result in a blocked flue condition. Some discoloration to exterior building or unit surfaces can be expected. Adjacent brick or masonry surfaces should be protected with a rust resistant sheet metal plate.

The Outdoor Vent Cap Kit

The optional outdoor vent cap kit is available from the appliance manufacturer. The outdoor cap part numbers are listed by unit size. See TABLE–H for kit numbers.

Install the outdoor vent cap on the rear of the unit (see FIG. 27). Complete installation instructions are included with the outdoor vent cap kit.

FIG. 27 Outdoor Vent Cap Installed on Rear of Unit

27