No more trips to the basement to add water to the boiler
• Works with all probe and float type low water cut-offs
• Brightly illuminated feed counter displays the amount of water added to the boiler
• Built-in memory prevents power interruptions from clearing the counter
• Helps prevent flooded boilers, allows time for condensate to return to the boiler before starting a feed cycle
• Six settings provide two ways to feed
• 1 - 5 Gallon settings now feed above the probe to restore the boiler's normal operating level or select LWCO setting to end the feed cycle
• Allows for additional make-up water at the touch of a button, manual feed amounts are recorded and added to the totalGallons displayed by the feed counter
• If one feed cycle is not sufficient to restore boiler operation, the VxT will delay and feed one additional cycle
• Digital feed counter
• 30 sec to 10 min programmable feed delay settings
• LWCO and 1 - 5 Gallon programmable feed amount settings
• Manual feed button
• Underfeed protection
• Lock-out flood protection
• 1 GPM flow rate
• 10 VA power consumption
  
  

  B112-4

Provides step-by-step, diagrammed instructions for fast, easy installation and wiring
• Burner circuit locks-out if water remains below probe for 30 sec
• Burner circuit test button allows for testing the control without lowering the water level and indicator lights for easy troubleshooting
• SPDT switch contact
  
  

  Hydrolevel B112-3

Quick hook-up fittings provided
• Lever operated, full port ball valve for easy blow down
• Adjustable Bx outlet for easy installation
• Dual precision switches for dependable operation of cut-off, alarm or electric water feeder
  
  

  McDonnell & Miller B103

125 VA pilot duty rating
• 4-1/8" length insertion
• Packless bellows
• Dual precision switches for dependable operation of the low water cut-off and an alarm or electric water feeder
• For mounting in 2-1/2" NPT boiler side tappings
• Adjustable Bx outlet for easy installation
  
  

  McDonnell & Miller B106

Adjustable Bx outlet for easy installation
• Dual precision switches for dependable operation of cut-off, alarm or electric water feeder
• Packless bellows
• Millivolt circuits

McDonnell & Miller B106-4

Burner circuit contacts open after 15 sec delay in a low water condition
• Delay prevents short cycling caused by momentary fluctuations in the boiler water level
• Automatically reactivates burner circuit 30 sec after water reaches the probe, allowing optional water feeder to raise water level above the probe
• SPDT switch contact
  
  

  Hydrolevel B103-38

Combustion pressure switch check feature and communication interface capability
• Heavy duty electro-mechanical design for long life
• Automatically re-energizes circuit upon return to safe water level
• Equipped with shorter probe for mounting in standard reducing tees
• SPDT switch contact
• Includes shorter EL1214-SV probe suitable for mounting in standard black tee
  
  

  Hydrolevel B103-30

Lockout delay
• Power interruption
• Self cleaning probe
• No lock out with loss of power if probe is in water
• Green LED indicates power on
• Red LED indicating low water condition
• 7000 ohm probe sensitivity
  
  

  B103-17

Continuous maintenance of minimum safe water level, independent of electrical service
• Proportional feed action
• Quick hook-up fittings provided
• Quick change replaceable cartridge valve and strainer
• Model 47 can be field upgraded with a No #2 switch to add low water cut-off function
  
  

  B110-1

McDonnell & Miller B120

McDonnell & Miller B115

McDonnell & Miller B122