GE PGP990 Serie Manual De Instrucciones página 25

Installatidff°l tructions
DUCTWORK CALCULATIONS
Calculate Total Ec uivalent Ductwork Length
Equivalent Number Equivalent
Duct Pieces Length* x Used = Length
6" round
straight ! ft. x ( )_ = ft.
3_Y' x i0"
straight ! ft. x ( )_= ft.
6",
90°
elbow !5 ft. x ( )= ft.
6",45 °
elbow 9 ft. x ( )= ft.
%
Q
24" max.
Flexible
Metal Offset
Adapter
3zA'' x !0"
90 ° elbow
3Vi' x !0"
45 ° elbow
3VY'x !0"
90° flat elbow
6" round
to 3V#'x 10"
transition
34 ft. x ( )=
16 ft. x ( ) =
5 ft. x ( )=
18 ft. x ( )=
ft.
ft.
ft.
ft.
7 ft. x ( ) = ft.
Subtotal Column ! = ft.
*Equivalent lengths of duct pieces are based on
actual tests and reflect requirements for good venting
performance with any downdraft cooktop.
t Measure and list feet of straight duct used. Count and
list the quantity of all other duct pieces for the "Number
Used" of each type.
IMPORTANT
For maximum efficiency, use the shortest and straightest
duct run possible, with as few fittings as possible. For
satisfactory performance, the duct run should not
exceed 100 feet equivalent length.
Venting performance is improved by using larger
diameter duct.
Duct Pieces
%
÷
6" round
to 3¼" x !0"
transition
90° elbow
3VY' x 10"
to 6" round
transition
3zA'' x !0"
to 6" round
transition
90 ° elbow
6" round
wall cap
with damper
Equivalent Number Equivalent
Length* x Used = Length
20 ft. x ( ) =
5 ft. x ( ) =
12 ft. x ( )=
ft.
ft.
ft.
21ft. x ( )= ft.
3_Y' x !0"
wallcap
with damper 27 ft. x ( )= ft.
6" round
roof cap 20 ft. x ( )= ft.
6" round
roof vent 24 ft. x ( )=
Subtotal Column 2 =
Subtotal Column 1 =
TOTAL DUCTWORK =
ft.
ft.
ft.
ft.
Should not exceed frO0 feet.
DO NOT use flexible plestic ducting.
Vent installation should not exceed 100 feet equivalent
length.
, Sufficient air is needed for proper combustion and
exhausting of gases through the flue (chimney) of
fuel burning equipment to prevent back drafting.
Follow the heating equipment manufacturer's
guideline and safety standards such as those
published by the National Fire Protection Association
(NFPA),and the American Society for Heating,
Refrigeration and Air Conditioning Engineers
(ASHRAE), a nd the local code authorities. When
applicable, install any makeup (replacement) air
system in accordance with local building code
requirements. Visit GEAppliances.com for available
makeup air solutions.
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