Installation / Operation Instruction Manual

10
Specifications continued-
Table 3: AHRI Certified Water Heater Ratings
Model
First
Hour
Rating
(Gal/Hr)
Continuous
Draw
Rating
(Gal/Hr)
Standby
Heat
Loss
Rating
(°F/Hr)
Minimum
Output of
Heat
Source
(BTU/Hr)
Minimum
Heat
Source
Flow Rate
(Gal/Min)
30-Gal.
178
160
0.8
120,000
14.0
40-Gal.
237
209
0.6
135,000
14.0
50-Gal.
269
229
0.5
145,000
14.0
75-Gal.
367
307
0.4
193,000
14.0
120-Gal.
409
319
0.3
199,000
9.0
NOTE: These certified ratings were obtained with a heat source output and
flow rate as specified in Table 3 and a 180°F boiler water supply temperature.
Other results will be obtained under different conditions.
Table 4: 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 rated heat transfer through the coil (heat input) of the
water heater at 180°F boiler water supply temperature is below
200,000 Btu/hr. for all models. Potable water volume is below 120
gallons, maximum potable tank pressure is below 160 psi, and
maximum potable water temperature is below 210°F for all units.
Accordingly, per Part HLW-101, 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
(Feet of Head)
30-Gal.
5.8
7.1
8.7 @ 14 gpm
40-Gal.
7.5
10.1
8.7 @ 14 gpm
50-Gal.
10.0
11.3
11.0 @ 14 gpm
75-Gal.
14.5
16.4
6.5 @ 14 gpm
120-Gal
22.2
20.9
4.5 @ 9 gpm