Lochinvar EnergyRite ER202 Installation & Operation Manual page 22

4
Vertical venting
Incorrect installation and/or location of the air inlet opening
can allow the discharge of flue products to be drawn into
the combustion process on the pool heater. This can result
in incomplete combustion and potentially hazardous levels
of carbon monoxide in the flue products. This will cause
operational problems with the pool heater and possible spillage
of flue products which can cause personal injury, death, or
property damage.
Length of air inlet pipe
The total equivalent length of the DirectAire sidewall or vertical
rooftop combustion air inlet pipe must not exceed a maximum
of 50 equivalent feet in length. Subtract 5 feet for each elbow in
the air intake system. Do not exceed limits for the combustion
air inlet piping lengths.
Combined air inlet points
The air inlet pipes from multiple pool heaters installed with the
DirectAire venting system can be combined to a single common
connection. The common air inlet pipe must have a cross
sectional area equal to or larger than the total area of all air inlet
pipes connected to the common air inlet pipe. [Example: two
5" air inlet pipes (19.6 in 2 area each) have a total of 39.2 in
will require a single 8" (50.3 in
The air inlet point for multiple pool heater air inlets must be
provided with an exterior opening which has a free area equal
to or greater than the total area of all air inlet pipes connected
to the common air inlet. This exterior opening for combustion
air must connect directly to the outdoors. The total length of
the combined air inlet pipe must not exceed a maximum of 50
equivalent feet. Subtract 5 feet for each elbow in the air inlet
pipe. You must deduct the restriction in area provided by any
screens, grills, or louvers installed in the common air inlet point.
These are common on the sidewall air inlet openings. Screens,
grills, or louvers installed in the common air inlet can reduce the
free area of the opening from 25% (metal louvers) to 75% (wood
louvers) based on the materials used.
Air inlet pipe materials
The DirectAire Vertical system requires installation of a
separate pipe to supply combustion air from outdoors directly
to the unit. The following air inlet pipe materials and sealing
recommendations apply whenever an optional venting system is
used to duct combustion air directly to the pool heater.
22
2
area) common air inlet pipe.]
2
The air inlet pipe(s) must be sealed.
combustion air inlet pipe materials from the following specified
materials in this section.
PVC, CPVC, or ABS (4" or 5" I.D.)*
Dryer Vent (not recommended for rooftop air inlet)
Galvanized steel vent pipe with joints and seams
sealed as specified below.
Type "B" double-wall vent with joints and seams
sealed as specified below.
* Plastic pipe requires an adapter (not provided) to
transition between the air inlet and cap.
Sealing of single-wall galvanized or Type "B" double-wall vent
material used for combustion air supply in a DirectAire Vent
System:
a. Seal all joints and seams of the air inlet pipe using
either aluminum foil duct tape meeting UL Standard
723 or 181A-P or a high quality UL listed silicone
sealant such as those manufactured by Dow Corning
or General Electric.
and
b. Do not install seams of air inlet pipe on the bottom
of horizontal runs.
c. Secure all joints with a minimum of three sheet metal
screws or pop rivets. Apply aluminum foil duct tape or
silicone sealant to all screws or rivets installed in the air
inlet pipe.
d. Ensure that the air inlet pipe is properly supported.
Using other vent or air intake materials,
⚠ CAUTION
failure to properly seal all seams and joints
or failure to follow vent pipe manufacturer's
instructions can result in personal injury,
death, or property damage. Mixing of
venting materials will void the warranty and
certification of the pool heater.
The use of double-wall vent material for the
NOTICE
combustion air inlet pipe is recommended
when the pool heater is operated in cold
climates to prevent the condensation of
airborne moisture in the incoming combustion
air.
Vent kits
The DirectAire Vertical Vent kit for sidewall or rooftop air inlet
must be ordered from the pool heater manufacturer for single
unit installations. The part number for each kit is listed by unit
size. Each kit includes the flue outlet adapter, air inlet collar and
in sidewall air kits, a sidewall combustion air inlet cap to supply
air to a single pool heater. Each kit includes instructions for
proper installation. The flue pipe, rooftop vent cap for the flue,
vertical air inlet cap, and air inlet pipe are purchased locally.
The air inlet cap for the combined air supply from multiple
units must be purchased locally.
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