McDonnell Miller Series 42 In Stock

Manufacturer:
McDonnell Miller
Description:

Low Water Cut-Off /Pump Controllers For residential, commercial, and industrial low and medium pressure steam boiler with a separate water column. Monel bellows provides corrosion resistance. Single pole, single throw mercury switches. Maximum pressure 50 psi.

Item Name: McDonnell Miller Series 42
Short description: McDonnell Miller Series 42
Lead Time: Most items In Stock ready to ship!
Replacement Heads
Part # Model # Description Weight Price Qty  
129502 42S-HD Replacement Head for 42-HD 9.50 $590.75 Add to Cart
Ordering Information
Part # Model # A B C D E F G Description Weight Price Qty  
129702 42-S-A 12 1/4 2 9/16 1 8 7/8 3 11/16 3 1/8 1/2 Combination low water cut-off pump controller (Replaces 42) 18.75 $865.95 Add to Cart
129800 42-N 42 w/ glass connector 25.00
Replacement Parts
Part # Model # Description Weight Price Qty  
348300 SA150-125 Switch, 2 wire (REPLACE THE HEAD THAT HAS THE SNAP TYPE SWITCH ) 2.50
341300 SA42-125 Switch, 2 wire 2.50
302600 CO-12 Head gasket (6 pack) 3.00 $43.50 Add to Cart
328300 MA-159 Quick hook-up fittings 8.00 $438.95 Add to Cart
351800* SA259-24 Upper quick hook-up 3.00 $111.95 Add to Cart
349500* SA159-24 Lower quick hook-up 3.00 $115.00 Add to Cart
349400* SA159-17 Black "Y" assembly 4.50 $82.25 Add to Cart
Dimensions
Model A B C D E F G H J K L M N P Q R S T
42 12 1/4 2 9/16 1 8 7/8 3 11/16 3 1/8 1/2
42-A 12 1/4 2 9/16 1 7 1/4 - 16 11/16 2 3/4 3 1/8 1/2
42-N 12 1/4 2 9/16 1 8 7/8 3 11/16 3 1/8 1/2 2.5625 2.5625 1 3/4 3 11/16 1 13/16 1 1/16 1 1/16 1 1/2 3/8 1/4 2 5/8
Alarm Circuit Rating
Voltage Amps
120 VAC 1
240 VAC 1/2
Electrical Ratings
Voltage Motor Switch Rating(Amperes)
120 VDC .5 Amp Full Load
Motor Switch Rating(Amperes)
120 VDC .5 Amp Locked Rotor
Pilot duty
120 VAC 7.4 44.4 125 VA at 120 or 240 VAC
240 VAC 3.7 22.2 125 VA at 120 or 240 VAC
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