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Xylem McDonnell & Miller 51 Series, Instruction Manual

The Xylem McDonnell & Miller 51 Series is a high-quality water flow switch. Ensure proper installation and maintenance by downloading the free Instruction Manual from manualshive.com for step-by-step guidance. Keep your system running smoothly and efficiently with this essential manual at your fingertips.

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Summary of Contents for McDonnell & Miller 51 Series

Page 1: ...ed on all steam boilers with heat input greater than 400 000 BTU hour or operating above 15 psi of steam pressure At least two controls should be connected in series with the burner control circuit to...

Page 2: ...nd two 2 pipe wrenches STEP 1 Determine the Location of the Feeder and or Low Water Cut Off Operating Levels of 51 51 2 51 S 51 S 2 or 53 53 2 Drip tight valve off 11 8 Casting line 0 Burner on 1 8 1...

Page 3: ...e Models 51 51 2 51 S 51 S 2 and 53 53 2 3 Lower Gauge Glass Connect to Return Header on Boiler Side of all Valves 1 Crosses Gauge Glass Level Mark 1 Steam Equalizing Line Short as Possible 1 Minimum...

Page 4: ...S 2 and Models 53 53 2 For Steam or Hot Water Boilers INSTRUCTIONS FOR PIPING THE WATER FEEDER VALVE TOOLS NEEDED Two 2 pipe wrenches STEP 1 Piping the Valve on Models 51 51 2 Swing Check Valve By pa...

Page 5: ...alarm switch If the electrical load exceeds the rating of the switch use an auxiliary relay or motor starter USED AS A MAIN LINE SWITCH AND OR LOW WATER ALARM USED AS A PILOT SWITCH TO COIL OF RELAY O...

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Page 8: ...poses Seller warrants the goods purchased hereunder with the exception of membranes seals gaskets elastomer materials coatings and other wear parts or consumables all of which are not warranted except...

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