6
STEP 4 - Control Wiring
• 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.
• All work must be performed by qualified personnel trained in the proper application, installation, and
maintenance of plumbing, steam, and electrical equipment and/or systems in accordance with all applicable
codes and ordinances.
Failure to follow this warning could cause electrical shock, an explosion and/or fire, which could result in
property damage, personal injury or death.
!
WARNING
OFF
ON
a.
Turn off all power to boiler and boiler controls.
b.
Electrical Conduit Connection
• Connect electric conduit using knockouts provided.
• Follow accepted electrical practices when installing fittings and making connections.
• Refer to and follow local codes and standards when selecting the types of electrical fittings and conduit.
c.
Based on the Boiler’s Control Circuit voltage and the required input voltage of the LWCO, select proper
wiring diagram and proceed to that page.
Boiler manufacturer schematics should always be
followed. In the event that the boiler manufacturer’s
schematic does not exist, or is not available from
the boiler manufacturer, refer to the schematics
provided in this document.
!
IMPORTANT
To prevent an electrical fire or equipment damage,
electrical wiring must have a rating of 167˚F (75˚C) if the
liquid's temperature exceeds 180˚F (82˚C).
Failure to follow this warning could cause property
damage, personal injury or death.
!
WARNING
Models with Red (low water) and Amber Lights (test)
Models with Red (low water) and Green (power) Lights
LWCO Model
Boiler Circuit Voltage
Page
LWCO Model
Boiler Circuit Voltage
Page
PS-802-24
24V using Harness
7
PS-802-24
24V using Harness
7
PS-802-24
24V using Terminals
7
PS-802-24
24V using Terminals
7
PS-852-24
24V using Harness
7
PS-852-24
24V using Harness
7
PS-852-24
24V using Terminals
7
PS-852-24
24V using Terminals
7
Do not use "manual reset" models with electric automatic water feeders.
Failure to follow this caution can cause flooding and property damage.
!
CAUTION
