User Guide

8
STEP 4 - Electrical Wiring
a. Using a flathead screwdriver, remove the one
(1) screw that secures the low water cut-off
switch cover (Y).
• To prevent electrical shock, turn off the electrical power before making electrical connections.
• This low water cut-off must be installed in series with all other limit and operating controls installed on the
boiler. After installation, check for proper operation of all of the limit and operating controls, before leaving
the site.
Failure to follow this warning could cause electrical shock, an explosion and/or a fire, which could result in
property damage, personal injury or death.
!
WARNING
Y
b. Using a flathead screwdriver, loosen the two
(2) screws and remove the feeder cover (Z).
Z
For 67 Low Water Cut-Off Installed with McDonnell & Miller Uni-Match Water-Feeder
c. Position the slide switch selector (AA) in the
position.
Directory: 67 Low Water Cut-Off and Uni-Match Water Feeder page 8 - 9
67 Low Water Cut-Off and 101 Water Feeder page 10 - 11
AA