Install Instructions
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Table 2.3: Specications
Model *
Minimum
Input
(MBH)
Maximum
Input
(MBH)
Gross
Output
AHRI Net
Rating *
(MBH)
Thermal
Efciency
Water
Volume
(Gallon)
Heating
Water
Connection
Size (WPT)
Gas
Connection
Size
(NPT)
Approx.
Net
Weight
(lb.)
Maximum
Allowable
Working
Pressure
(PSI)
ASPN-320 32 320 304 264 95.0 7.0 1 1/2" 3/4" 270 80
ASPN-399 39.9 399 379 330 95.0 6.7 1 1/2" 3/4" 275 80
* The Net AHRI Water Ratings shown are based on a piping and pickup allowance of 1.15. The manufacturer should be consulted
before selecting a boiler for installations having unusual piping and pickup requirements, such as intermittent system operation,
extensive piping systems, etc.
Figure 2.2: Boiler Internal Component Locations
II. Specications (continued)