Minimum And Maximum Wall Thickness; Vent Pipe Sizing - Watts AERCO Modulex EXT Commercial Series User Manual

Modulex EXT Commercial Series Boilers User Manual
CHAPTER 4: Installation Instructions
pipe. Such conditions must be considered and where necessary insulation of the inlet pipe may
be required. In cold and/or humid weather water vapor may condense when leaving the vent
terminal. The effect of such condensation must be considered. The terminal must be located in
a place not likely to cause a nuisance.
Maintain 12" of clearance above the highest anticipated snow level or grade, whichever is
greater. Please refer to your local codes for the snow level in your area.
The whole route of the vent system must be installed upwards and NEVER completely nor
partly downwards.

4.22.2 Minimum and Maximum Wall Thickness

The label at right, which is placed on the unit,
indicates the minimum and maximum wall thickness
through which venting is allowed to penetrate
horizontally. However, if venting is vertical, then there
is no minimum wall thickness.

4.23 VENT PIPE SIZING

The maximum length is the combined length of straight horizontal and vertical runs, and the
equivalent straight length of fittings. The required lengths for each boiler are as follows:
NOTE:
The examples referenced in the table below are on the next page.
TABLE 4-4: MODULEX EXT Vent and Piping DIAMETER Chart
MODEL
EXT 1530 / 1500
EXT 1912
EXT 2295 / 2300
EXT 2677 / 2600
EXT 3060 /3000
TABLE 4-5: MODULEX EXT Vent and Piping LENGTH Chart
VENT PIPE
MODEL
DIAMETER
EXT 1530 / 1500
(254 mm)
EXT 1912
EXT 2295 / 2300
EXT 2677 / 2600
(304 mm)
EXT 3060 / 3000
Page 46 of 144
09/15/2017
VENT
NO. OF
DIAMETER
MODULES
INCHES (MM)
4 10" (254 mm)
5 10" (254 mm)
6 12" (304 mm)
7 12" (304 mm)
8 12" (304 mm)
SHARP 90°
ELBOW
EQUIVALENT
FEET (M)
10" 13 Feet
(4 m)
12" 13 Feet
(4 m)
AERCO International, Inc. • 100 Oritani Dr. • Blauvelt, NY 10913
Phone: 800-526-0288
MAX. VENT EQUIV.
FEET (M)
EXAMPLES 1 & 2
100 ft. (30 m)
100 ft. (30 m)
100 ft. (30 m)
100 ft. (30 m)
100 ft. (30 m)
SWEEP 90°
45° ELBOW
ELBOW
EQUIVALENT
EQUIVALENT
FEET (M)
FEET (M)
7 Feet 5 Feet
(2 m) (1.5 m)
7 Feet 5 Feet
(2 m) (1.5 m)
MAX. VENT EQUIV.
FEET (M)
EXAMPLES 3 & 4
6 + 6 (1.8 + 1.8)
6 + 6 (1.8 + 1.8)
6 + 6 (1.8 + 1.8)
6 + 6 (1.8 + 1.8)
6 + 6 (1.8 + 1.8)
MAXIMUM
LENGTH
EQUIVALENT
FEET
(METERS)
100 Feet
(30 m)
100 Feet
(30 m)
OMM-0095_0H
GF-139