Modulex EXT Commercial Series Boilers User Manual
CHAPTER 4: Installation Instructions
Page
46
of
144
AERCO International, Inc.
•
100 Oritani Dr.
•
Blauvelt, NY 10913
OMM-0095_0H
09/15/2017
Phone: 800-526-0288
GF-139
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
NO. OF
MODULES
VENT
DIAMETER
INCHES (MM)
MAX. VENT EQUIV.
FEET (M)
EXAMPLES 1 & 2
MAX. VENT EQUIV.
FEET (M)
EXAMPLES 3 & 4
EXT 1530 / 1500
4
10” (254 mm)
100 ft. (30 m)
6 + 6 (1.8 + 1.8)
EXT 1912
5
10” (254 mm)
100 ft. (30 m)
6 + 6 (1.8 + 1.8)
EXT 2295 / 2300
6
12” (304 mm)
100 ft. (30 m)
6 + 6 (1.8 + 1.8)
EXT 2677 / 2600
7
12” (304 mm)
100 ft. (30 m)
6 + 6 (1.8 + 1.8)
EXT 3060 /3000
8
12” (304 mm)
100 ft. (30 m)
6 + 6 (1.8 + 1.8)
TABLE 4-5: MODULEX EXT Vent and Piping LENGTH Chart
MODEL
VENT PIPE
DIAMETER
SHARP 90°
ELBOW
EQUIVALENT
FEET (M)
SWEEP 90°
ELBOW
EQUIVALENT
FEET (M)
45° ELBOW
EQUIVALENT
FEET (M)
MAXIMUM
LENGTH
EQUIVALENT
FEET
(METERS)
EXT 1530 / 1500
10”
(
254
mm)
13 Feet
(4 m)
7 Feet
(2 m)
5 Feet
(1.5 m)
100 Feet
(30 m)
EXT 1912
EXT 2295 / 2300
12”
(
304
mm)
13 Feet
(4 m)
7 Feet
(2 m)
5 Feet
(1.5 m)
100 Feet
(30 m)
EXT 2677 / 2600
EXT 3060 / 3000
