Provisions for connecting a remote thermistor, alarm bell, pump, and alternate temperature controller must be provided. Factory mounted and wired flow, blower prover, and blocked flue switches shall be provided. The gas train shall meet or exceed the requirements of ANSI Z21.13 and include gas pressure regulator, manual gas cock, redundant safety gas valve, operating control valve, and plugged pressure test tapings. The ASME rated pressure relief shall be factory installed. The boiler shall be c

O. Smith July 2011R GW/GWO-300 THROUGH GW/GWO-750 PG 1 OF 4 AOSDG25200 Commercial Gas Boilers GW SERIES INDOOR MODELS GWO SERIES OUTDOOR MODELS PG 2 OF 4 MODEL NUMBER BTU INPUT PER HOUR DIMENSIONS IN INCHES EXHAUST VENT AIR INLET WATER CONN. GAS PIPE (SEE DRAWINGS ABOVE) WIDTH A B C GW SERIES INDOOR MODELS GW-300 300,000 5 5 1-1/2 3/4 29-1/2 14-13/16 9 12 GW-400 399,900 6 6 1-1/2 1 35-3/4 17-15/16 9 14-3/4 GW-500 500,000 6 6 2 1 42 21-1/16 9 14-3/4 GW-650 650,000 8 8 2 1-1/4 51-3/8 25-3/4 9 14-3

Requires 120V 60Hz, maximum inlet gas pressure of 14" W.C. and activation of heater by an external temperature control. OPTIONAL POWER VENT KIT - For sidewall venting. WORKING PRESSURE - ASME approved, hydrostatically tested and certified for 160 psi (1100 kPa). * Model HW-399: 81% efficiency, Model HW-610: 80% efficiency. COMMERCIAL BOILERS HW-300 THRU HW-610 Domestic Hot Water Supply Not approved for instantaneous applications. FOR UNITS BUILT FOR U.S.A. FOR UNITS BUILT FOR CANADA HW M

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2) The burner shall be capable of infinitely modulating between 25% and 100% fire (4:1 turndown) with smooth starts and clean combustion. Boiler Controls: 1) All electrical boiler functions shall be controlled, operated, and monitored by a microprocessor-based control. 2) The microprocessor shall control and modulate the burner based on current system output requirements to maintain the boiler set point temperature and be accurate to within plus or minus 1°F. 3) The hot surface ignition system s

A drain line from the relief valve should terminate near a suitable drain. Do not thread, plug, or cap the end of the drain line. The pressure setting of the relief valve should not exceed the pressure capacity of any component in the system including the boiler. HIGH TEMPERATURE DEVICES Automatic Device The boiler control circuit contains a high temperature cutoff switch. This device shuts off the heating elements if excessive water temperatures are reached. The high temperature cutoff has an a

CONSULT FACTORY FOR CERTIFIED DIMENSIONS. 5. ALL FLANGES ARE 150# UNLESS OTHERWISE NOTED, FLANGES TO STRADDLE CENTER LINE. PLAN VIEW FR°NT VIEW RIGHT SIDE VIEW REAR VIEW 1. PROBE TYPE AUX. L.W.C.O. 6. JACKET ACCESS PANELS 11. DRAIN/ BLOWDOWN - 1" NPT 16. HEIGHT OVER JACKET 2. FORCED DRAFT BURNER 7. PRESSURE GAUGE 12. BURNER CENTER LINE 17. HEIGHT OVER SUPPLY 3. RELIEF VALVE 8. CLNOUT./INSP. OPNG.-1 1/2"NPT 13. OIL PUMP LOCATION 18. MINIMUM SAFE WATER LEVEL 4. ASME NAMEPLATE 9. ELEC. ENCLO

Actual combustion efficiencies will be higher and fuel dependent.