Lochinvar EW150 Installation & Service Manual page 15

2
General venting
Vent Kits
The sidewall E+Vent Kit must be ordered from the
manufacturer for single appliance installations with sidewall
air inlet. The part number for each kit is listed by appliance
size. Each kit includes a sidewall combustion air inlet cap
to supply air to a single appliance and instructions for proper
installation. The flue pipe, roof top vent cap and air inlet
pipes are purchased locally. The air inlet cap for a vertical
roof top termination is fabricated from materials purchased
locally. The air inlet cap for the combined air supply from
multiple appliances must be purchased locally.
TABLE 2B
SIDEWALL VENT KITS
Input Conventional
Btu/hr Flue Size*
150,000 5"
199,999 5"
250,000 6"
300,000 6"
*Vent size with 1" increaser installed for conventional
negative draft venting.
**Minimum diameter, installer may increase diameter one
pipe size for ease of installation if needed. A 6" diameter air
inlet cap may be ordered as Sidewall E+Vent Kit SVK3022.
The sidewall air inlet cap supplied in the Sidewall E+Vent
Kit is used to supply combustion air to a single appliance.
The roof top vent cap for flue products should be a standard
commercial cap purchased locally. The use of a sidewall
air inlet cap other than the manufacturers recommended
cap for single appliance installations or use of a common
air inlet cap for multiple appliances with insufficient free
area and/or protection from wind and weather may result
in operational problems with the appliance or potentially
hazardous spillage of flue products which can cause personal
injury, death or property damage.
(continued)
Sidewall
Air Inlet
E+
Pipe**
Vent Kit
4" SVK3020
4" SVK3020
5" SVK3021
6" SVK3021
Installation & Service Manual
Venting of Flue Products
On a conventionally vented, negative draft appliance, the
connection from the vent to the stack or vent termination
outside the building MUST be made with listed Type "B"
double wall (or equivalent) vent connectors and must be
direct as possible with no reduction in diameter. The bell
increaser, factory installed on the flue outlet, MUST be used.
Use the National Fuel Gas Code venting tables for double
wall vent to properly size all vent connectors and stacks.
The type "B" vent and accessories, such as firestop spacers,
thimbles, caps, etc., MUST be installed in accordance with
the manufacturers listing. The vent connector and firestop
must provide correct spacing to combustible surfaces and
seal to the vent connector on the upper and lower sides
of each floor or ceiling through which the vent connector
passes. The vertical flue of an E+Vent must maintain a
negative draft within the specified range.
An appliance installed in an application such as a restaurant
or industrial installation where exhaust fans, air handlers
or other mechanical equipment are creating an excessive
negative pressure in the mechanical room may require
that the appliance be installed with an optional direct vent
system. Local codes which require the installation of a
certified direct vent system must use one of the ANSI tested
direct vent systems. The direct vent system uses a sealed
AL29-4C stainless steel vent material and a sealed
combustion air inlet pipe. See E+Vertical Direct Vent System
or E+Sidewall Direct Vent System installation requirements
in this manual.
The connection from the vent to the vent termination
outside the building MUST be made with type "B" double
wall vent materials and must be direct as possible with no
reduction in diameter. The vent accessories, such as firestop
spacers, thimbles, caps, etc., MUST be from the same vent
material and installed in accordance with the manufacturers
listing. The vent connection through the roof must provide
correct spacing to combustible surfaces.
Horizontal runs must slope upwards not less than 1/4 inch
per foot (21 mm per meter) from the appliance to the vent
terminal. Follow manufacturers instructions.
The vent cap shall terminate at least 3 feet (91 cm) above any
forced air inlet within 10 feet (3.05 m).
The vent shall terminate at least 4 feet (1.22 m) below, 4 feet
(1.22 m) horizontally from or 1 foot (30 cm) above any door,
window or gravity air inlet to the building.
Do not terminate the vent in a window well, stairwell, alcove,
courtyard other recessed area. The vent can not terminate
below grade.
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