Installation / Operation Instruction Manual

9
Specifications continued-
Table 5: Water Heater Performance
NOTICE
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.
Model
Hot Water
Availability
(Minutes)
Coil Heat
Transfer Area
(Sq Ft)
Pressure Drop at
Rated Heat
Source Flow Rate
(Feet of Head)
40-Gal.
6.8
14.2
2.4
50-Gal.
8.6
14.2
2.4
65-Gal.
10.8
14.2
2.4
80-Gal.
13.5
14.2
2.4