Modulex EXT Commercial Series
CHAPTER 4: Installation Instructions
OMM-0160_A
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The terminal should be located where dispersal of combustion products is not impeded and with due
regard for the damage or discoloration that might occur to building surfaces in the vicinity. In certain
weather conditions condensation may also accumulate on the outside of the air inlet 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 terminal must not be located in a place 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, NOT 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 1500 2S
4
10
” (
254 mm)
100 ft. (30 m)
6 + 6 (1.8 + 1.8)
EXT 2300 2S
6
12
” (
304 mm)
100 ft. (30 m)
6 + 6 (1.8 + 1.8)
EXT 2600 2S
7
12” (304 mm)
100 ft. (30 m)
6 + 6 (1.8 + 1.8)
EXT 3000 2S
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 1500 2S
10”
(254 mm)
13 Feet
(4 m)
7 Feet
(2 m)
5 Feet
(1.5 m)
100 Feet
(30 m)
EXT 2300 2S
–
EXT
3000 2S
12”
(304 mm)
13 Feet
(4 m)
7 Feet
(2 m)
5 Feet
(1.5 m)
100 Feet
(30 m)
NOTE:
The flue system must be installed in accordance with the local and national Standards.
Summary of Contents for AERCO MLX EXT 1500 2S
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