Ratings And Capacities - HELIX VX-399 Installation, Operation & Maintanance Manual

Table 13 - Sea Level Ratings
Boiler Input Rate (MBH)
Size
Maximum
399
1000 Btu/hr (British Thermal Units Per Hour)
(1)
Gross Output and Thermal Efficiency is based on DOE (Department of Energy) test procedures.
(2)
Net AHRI Ratings based on piping and pickup allowance of 1.15. Contact Technical Support before selecting boiler for
(3)
installations having unusual piping and pickup requirements, such as intermittent system operation, extensive piping systems, etc.

12.1 Ratings and Capacities

• Constructed and hydrostatically tested for maximum
allowable working pressure of 150 psig (pounds per
square inch gauge) (1035 kPa) in accordance with
ASME Boiler and Pressure Vessel Code, Section IV,
Rules for Construction of Heating Boilers.
• Ratings used for elevations up to 2000 ft (600m) above
sea level.
• For elevations between 2000 ft (600m) and 4500 ft
(1350m), install high altitude control kit
• For elevations above 4500 ft (1350m) install high
altitude control kit and :
• USA - Reduce input rate 4% for each 1000 ft (300m)
beyond 4500 ft.
• Canada - Contact Provincial authority having
jurisdiction for installations above 4500 feet (1350
m) above sea level.
12 - RATINGS AND CAPACITIES
NATURAL AND PROPANE GASES
Minimum
399 80
SEA LEVEL RATINGS
GROSS
(1)
OUTPUT
(MBH)
(1)(2)
383
43
Net AHRI
Thermal
Rating, Water
Efficiency
(MBH)
(1)(3)
333
P/N 240010943, Rev. C [09/07/2016]
96.0