Brochure
Series RB
LWCO for Hot Water Boilers
Features and Benefits Include:
Series RB-24E
• Brass threads enable a secure and trouble-free installation.
• Test button to quickly conrm proper operation.
• Universal wiring harness ts 100% of today’s gas boilers.
• - S, -A and -L models provide “plug & play” installation with
most popular residential boilers.
• Self-cleaning probe.
For over 85 years, McDonnell & Miller has been a name
you can trust and rely on for boiler safety controls.
Series RB-122E
• Brass threads enable a secure and trouble-free installation.
• Test button to quickly conrm proper operation.
• Easily and quickly installs on any hot water heating boiler.
• Self-cleaning probe.
The Series RB GuardDog® Low Water Cut-Offs provide low water
protection for hot water boilers installed in residential applications.The
burner circuit will be interrupted if there is an unsafe water loss, which
can result from a broken or leaking radiator or pipe, or a cracked section
on the boiler
The International Residential Code (2003 and newer), upon which many
state and local codes are based, states:
M2002.5 Boiler low-water cut-off. All steam and hot water boilers shall
be protected with a low-water cutoff control. The low-water cutoff shall
automatically stop the combustion operation of the appliance when the
water level drops below the lowest safe water level as established by
the manufacturer.
McDonnell & Miller GuardDog Low Water Cut-Offs ensure code
compliance and provide the necessary level of homeowner safety.