Install Instructions

2
RB-24 SPECIFICATIONS
Electrical Ratings
Power
Voltage Consumption Switching Capacity
24 VAC 2.5 VA 2A at 24 VAC
Te m p e r a t u r e :
S t o ra g e : -40˚F to 120˚F (-40˚C to 49˚C)
A m b i e n t : 32˚F to 120˚F (0˚C to 49˚C)
H u m i d i t y : 85% (non-condensing)
M a x i mum Water Pressure: 160 psi (11.2 kg/cm
2
)
M a x i mum Water Te m p e r a t u r e : 250˚F (121˚C)
E n closure Rating: NEMA 1 General Purp o s e
IMPORTANT:
Do not use Model RB-24 on
steam boilers.
IMPORTANT:
Do not use on millivolt
systems.
STEP 1 - Determine Where to Install the Low Water Cut-Off
Follow the installation instructions included with the RB-24 LWCO, determine where to locate the control.
Please note that the connector cable included the UWH wiring harnesses is 5ft long which will determine
where the RB-24 control is located in the boiler or piping.
STEP 2 - Electrical Wiring Options
• 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 property damage, personal injury or death.
WARNING
IMPORTANT: Before making any wiring connections to the boiler with the connector or 'Y' harnesses,
YOU MUST wire the boiler per boiler manufacturer's recommendations and verify operation.