Modulex Light Commercial Series
CHAPTER 3: TECHNICAL FEATURES & DIMENSIONS
OMM-0158_A
• 6/28/2022 Technical Support • (800) 526-0288 • Mon-Fri, 8 am - 5 pm EST Page
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3.5 Performance Data
TABLE 3-2: MODULEX EXT Performance Data
EXT 450 2S
EXT 600 2S
EXT 800 2S
EXT 1100 2S
Min Input
46,000
46,000
46,000
46,000
Max Input
481,500
642,000
802,500
1,123,500
Max Output*
422,000-
457,000
564,000-
609,000
707,000-
762,000
993,000-
1,067,000
Efficiency Range
87%-99%
87%-99%
87%-99%
87%-99%
Boiler Category
IV
IV
IV
IV
Gas Connections (NPT)
2”
2”
2”
2”
Max. Gas Pressure
10.5”
10.5”
10.5”
10.5”
Min. Gas Pressure
3.5”
3.5”
3.5”
3.5”
Max. Allowed Working Pressure
92 psi
92 psi
92 psi
92 psi
Electrical Req: 120V
2.7 FLA
3.6 FLA
4.5 FLA
6.3 FLA
Water Connections (NPT)
2 1/2”
2 1/2”
2 1/2”
2 1/2”
Min. Water Flow @ Min. Fire
(GPM)
7
9
11
16
Min. Water Flow @ Full Fire (GPM)
18
24
30
42
Max. Water Flow (GPM)
42
56
71
99
Water Pressure Drop @ Max. Flow
(Ft. of Hd)
9.5
4.9
5.9
8.0
Water Volume: Gallons
3.8
4.9
5.9
8.0
Thermal Modules
3
4
5
7
Turndown or Operating Range
10.5:1
14:1
17.5:1
24.5:1
Vent & Air Inlet Size
4”
4” air intake
6” exhaust
6”
6”
Vent Materials (as per local code)
Can support PVC, cPVC , Polypropylene or AL29-4C venting
materials
Type of Gas
Natural Gas or Propane
Temperature Control Range
Units deliver 68°-180°F supply; Min. 35°F inlet water required
Maximum Noise Level
<50 dBa when operating at or below full fire
Standard Listings and Approvals
UL, ASME, CSD-1, Mass. Approval, SCAQMD
Water Quality
PH operating range 6.5 to 8.0 and Glycol (if used) MUST be
compatible Cast Aluminum heat exchangers.
NOTE:
The Technical data plate is placed under the casing.
