Smith HW 420 Instruction Manual Download Page 4 | Manualshive

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FIGURE 3. WIRING DIAGRAM

WIRING DIAGRAM

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Summary of Contents for HW 420

Page 1: ...rity having jurisdiction requires that the installation must conform to the standard for Controls and Safety Devices for Automatically Fired Boilers ASME CSD 1 The rules of the code cover the requirem...

Page 2: ...TROL DIAGRAM 3 WIRING DIAGRAM 4 OPERATING SEQUENCE 5 OPERATING SEQUENCE WHEN WIRED AS SHOWN 5 TESTING AND MAINTENANCE 6 INSTRUCTIONS FOR TESTING AND MAINTENANCE 7 DAILY CHECKS 7 WEEKLY CHECKS 7 MONTHL...

Page 3: ...information on this Hot Water Boiler installation see Instruction Manual 321078 000 The wiring changes brought about by the addition of the Figure 2 manual reset High Limit and the Flow Switch are ref...

Page 4: ...4 Figure 3 WIRING DIAGRAM WIRING DIAGRAM...

Page 5: ...the pump providing sufficient water flow the flow switch will close contacts allowing power to be supplied to the transformer through the manual reset high limit 4 Power continues through the normally...

Page 6: ...nd safety devices operating as intended at all times a periodic testing and maintenance schedule should be set up and followed with results being logged on a regular basis Operators or maintenance tec...

Page 7: ...bly inspected on a daily basis for normal operation These items should be noted and the differential temperatures recorded during operation If the temperature differential increases by five 5 degrees...

Page 8: ...8 25589 Highway 1 McBee SC 29101 Technical Support 800 527 1953 Parts 800 433 2545 Fax 800 644 9306 www hotwater com...

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