| BTU Rating | : | 660000 Btu/hr |
| Chimney/Breeching/Vent Size | : | 12 in |
| Connection Type | : | 1 in NPT |
| Dimensions | : | 68-5/16 in H x 36-1/2 in D |
| Flow Rate | : | 53 gpm |
| Frequency Rating | : | 60 Hz |
| Fuel Type | : | Natural Gas |
| Material | : | Bronze/Brass |
| Mounting Type | : | Floor |
| Net BTU Rating | : | 528000 Btu/hr |
| Pressure Rating | : | 160 psi |
| Vent Type | : | Atmospheric |
| Voltage Rating | : | 120 VAC |
AO Smith® Water Heater, 120 VAC, 60 Hz Frequency, 660000 Btu/hr BTU, 53 gpm Flow Rate, 160 psi Pressure, 1 in NPT Connection, Natural Gas Fuel, Atmospheric Vent, Chimney/Breeching/Vent Size: 12 in, Net BTU Rating: 528000 Btu/hr, Floor Mounting, Bronze/Brass, Dimensions: 68-5/16 in H x 36-1/2 in D
- All castings are made of bronze or brass
- All water tubes are made from copper
- Brazed joints or flare union construction make the boiler immune to the effects of thermal shock and thermal cycling
- A great boiler for domestic hot water supply
- The efficient copper coil combustion chamber is a heat exchanger formed from a two passage coil of tightly wound continuous copper tube
- Water circulating through this coil surrounds the main burner and captures the radiant heat
- A wrap of insulation on the outside of the coil retains the heat captured by the circulating water
- Directly above the coil and the main burner is a compact, horizontal, copper fin tube heat exchanger
- The flue gases must pass through this efficient heat exchanger before leaving the boiler
- This unique Burkay® coil and heat exchanger design provide maximum heat transfer and proven field durability
- The patented Burkay® burner uses primary air injection at up to 72 individual orifices plus secondary entrainment of air
- Approved for installation on combustible floors as shipped from factory
- Slow opening redundant gas valves ensure smooth light off without flame roll-out or pilot outage
- Patented pump delay system that allows boiler and pump to run simultaneously but delays pump shut-off at end-of heating cycle to remove usable heat from the heat exchanger and reduce the scale forming tendencies of motionless hot water
- Proven pilot ignition system provides flame failure response in under one second
- Redundant high limit controls and gas valves assure safe shutoff in the event of overheating or flame failure
- Requires 120 V 60 Hz, maximum inlet gas pressure of 14 in-WC and activation of boiler by external temperature control