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Specifications continued-
Table 5: Water Heater Performance
MODEL
40-Gal.
50-Gal.
65-Gal.
80-Gal.
If the boiler takes longer to heat up from a cold start
than the water availability as noted above, hot water
shortage may occur.
Hot water availability is based on drawing 80% of the
heated tank volume at 4 gallons per minute flow rate.
The maximum heat transfer through the coil (heat
input) of the water heater at 240°F boiler water supply
temperature and 210°F potable water temperature is
23,500 Btu/hr. Potable water temperature is limited to
below 210 °F and nominal water-containing capacity
is below 120 gallons for all indirect-fired models.
Accordingly, per Part HLW-101.2, Section IV of the
ASME Boiler and Pressure Vessel Code, all indirect-
fired products listed are exempted from compliance
with the code.
Hot Water
Availability
Transfer Area
(Minutes)
6.8
8.6
10.8
13.5
NOTICE
10
Pressure Drop at
Coil Heat
Source Flow Rate
(Sq Ft)
14.2
14.2
14.2
14.2
Rated Heat
(Feet of Head)
2.4
2.4
2.4
2.4
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