AquaStar AQ3ES User Manual
April 1, 2006
Model 250SX
AQ3 Vent Kit & Additional Parts
(For Horizontal Venting)
IMPORTANT
In order for this water heater
to perform properly, correct
venting is necessary.
See 250SX Installation Manual.
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The AQ3 Vent Kit, for Bosch AquaStar Model 250SX, is designed to be used in the following room-sealed or
unsealed installations. Please note that some installations may require additional venting parts. See back page
for a list of additional venting parts.
Room-Sealed; Twin Pipe System (Recommended)
Exhaust Venting:
This heater requires Category III AL29-4C, 3" or 4"
diameter stainless steel vent pipe (3" provided in
Vent Kit).
The exhaust vent pipe and the combustion air pipe each have a maximum
length of 26 feet (8m) with one elbow.
For each additional elbow after the first
elbow, you must reduce 2.5 feet
from the total length. A maximum of 3
elbows on each pipe is allowed.
Twin Pipe
Horizontal
All parts shown in diagram
are included in AQ3 Vent Kit.
Intake/Combustion Air:
The combustion air pipe system may be
constructed of either 3" PVC, aluminum or galvanized pipe (aluminum provided in Vent Kit).
A condensate drain kit
must be used in all
installations.
A condensate drain kit
is included with the
AquaStar 250SX.
AQ3 Vent Kit Items
11.50 to 15
4ZVAL03
Adjustable Adapter 3"
7.91
7.91
2SVEEWCF0390
90 Degree Elbow 3"
Dimensions listed in inches
10.00
1TLXXXX0310
Flex Pipe – Inlet Air
3" x 10 '
10.00
2SVSWTCEC03
Wall Thimble 3"
5.00
5.00
4.25 to 7
5.00
5.00
12.01
12.01
2SVSTB03
Exhaust/Intake Vent Hoods
w/10" Sleeve 3" (2)
7HS44XX
Gear Clamps 3" (2)
Note: Refer to AquaStar 250SX Installation Manual for complete exhaust venting & combustion air requirements.
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