Install Instructions

2
OPERATION
SPECIFICATIONS
The Model RB-24E Low Water Cut-Off is specifi-
cally designed to provide burner cut-off if there is
an unsafe water loss, which can result from a bro-
ken or leaking radiator or pipe, or a cracked sec-
tion in the boiler.
Water/glycol mixtures up to 50% concentration
may be used.
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
The UWH-RB-24S is for use on hot water boilers that have a
transformer plug connection on the aquastat.
The UWH-RB-24A is for use on hot water boilers that have
a vent damper
The UWH-RB-24L is for use on hot water boilers that have a
control panel connection
I M P O RTA N T: U n i versal wiring harness adaptors
are now ava i l a b le for use with systems hav i n g
modular plug-on bu rner controllers and ve n t
dampers (sold separa t e l y ) .
U W H - R B - 2 4 A
P/N 144681
U W H - R B - 2 4 L
P/N 144691
U W H - R B - 2 4 S
P/N 144682