Installation Considerations; Rough In Dimensions; Recovery Capacities; Gas And Electrical Characteristics - A.O. Smith BTR 151 Instruction Manual

rough in dimensions

TABLE 1. HEATER PERFORMANCE DATA (Recovery ratings based on 80% thermal efficiency)
input
model rate
Btuh
Btr(c)-151 150,000 NAT
44 kW/Hr. nAT 121 litres
Btr(c)-151 150,000 lP
44 kW/Hr. LP
Btr(c)-201 199,900 NAT
59 kW/Hr. nAT 121 litres
Btr(c)-201 182,000 lP
53 kW/Hr. LP
taBle 2. gas and electrical characteristics
model gas type
Btr(c) 151/201 Natural
Btr(c) 151/201 Propane

installation considerations

recoVery rating capacities (gph) at temperature rise shown
approx.
approx.
tank
f 20°f
eff . %
cap.
c 11°c
32 Gal
80 GPh 727
lPh 2752 1836 1378 1102
32 Gal
80 GPh 727
121 litres lPh 2752 1836 1378 1102
32 Gal
80 GPh 969
lPh 3668 2445 1836 1469 1223 1049
32 Gal
80 GPh 882
121 litres lPh 3339 2226 1669 1336
gas supply pressure
minimum
5.6" W.C. (1.39 kPa)
11" W.C. (2.74 kPa)
figure 5.
30°f 40°f 50°f 60°f 70°f
17°c 22°c 28°c 33°c 39°c
485 364 291 242 208
916 787
485 364 291 242 208
916 787
646 485 388 323 277
588 441 353 294 252
1113 954
gas manifold
pressure
maximum
14" W.C. (3.48 kPa) 3.5" W.C. (0.87 kPa)
14" W.C. (3.48 kPa) 10" W.C. (2.49 kPa)
8
80°f 90°f 100°f °f °f
110 120
44°c 50°c 56°c
61°c 67°c
182 162 145 132 121
689 613 549 500 458
182 162 145 132 121
689 613 549 500 458
242 215 194 176 162
916 814 734 666 613
221 196 177 160 147
837 742 670 606 557
Volts / hz
120/60
120/60
°f °f
130 140
72°c 78°c
112 104
424 394
112 104
424 394
149 139
564 526
136 126
515 477
amperes
<5
<5