Low Water Cutoff Brochure and Submittal

Application
The Taco LWCO provides reliable
protection for all types of boilers,
from small residential hot water
boilers to large industrial steam
boilers. The boiler’s minimum safe
operating water level is specified
by each manufacturer. Should the
water level dip below that specified
level, heat will accumulate quickly
causing significant damage to the
boiler and a potential external safety
hazard. The Taco LWCO prevents
this hazard from occurring. The
LWCO can be used as a primary
or secondary low water cutoff on
steam boilers up to 250 psi, a pri-
mary limit control on hot water
boilers or to protect pumps from
running dry in condensate receiver
tank applications. The LWCO can
also activate alarm systems or
automatic water feeders.
Worry Free Operation
Every LWCO has been upgraded to
incorporate our patented signal process-
ing technology to deliver the best low
water protection available. It’s so smart
it will even tell you when the probe
should be cleaned, eliminating the need
for yearly maintenance.
Simplified Installation & Wiring
The plug n’ play wiring harness for 24
VAC or tri-barrier terminals for 120 VAC
wiring makes meeting code, including
CSD-1, a snap.
Confidence
A test button verifies that the wiring and
installation was done correctly before
leaving the job. LED lights eliminate the
guess work on service calls by identiying
if the cause of the low water condition
was a dirty probe or lack of water.
Selection Made Easy
The LTR, LTA-2 and LF Series of Low
Water Cutoffs match the safety and
installation requirements of any style sys-
tem while featuring the simplicity, reliabil-
ity and unmatched quality you’ve come
to expect from Taco Electronic Controls.
Seamless Integration
Pairs perfectly with the Taco Electric
Water Feeder to maintain safe water
content in the boiler. See Taco Catalog
#100-36 to see all of its advanced and
patent pending feaures.
Probe Style LWCO
A probe uses the boiler’s water
to complete an electrical circuit. As
long as water covers the probe, the
electronic circuit will be maintained.
If the water level drops below the
probe, the circuit is broken, shutting
down the burner and protecting
the boiler.
Normal operation Low water condition
In a low water situation, if the burner
continues to fire, damage can occur to
the boiler and create a potential disaster.
A Taco Low Water Cutoff turns off the
burner and signals that a low water
situation has occurred.
LTR
The LTR is a 1-piece, sealed design for
use with residential hot water boilers.
The auto reset LTR comes complete
with a test button, LED lights and a
plug-in 24 VAC wiring harness so you
can meet code while having the confi-
dence the control was wired correctly
the first time.
LTA-2
The LTA-2 models are used on smaller
hot water boilers (usually under 400,000
BTU). Available in 24 and 120 VAC auto
reset models, the LTA-2 has a compact
full metal enclosure with direct probe
mounting, a test button, external LED
lights and easy-to-wire tri-barrier ter-
minals. Built with the same patented
signal processing technology as the LTR,
the LTA-2 is a great solution for upgrad-
ing the safety of current systems or
when traditional 120 VAC hard wiring is
required.
LF
The LF model is the ultimate LWCO
control for use with hot water or steam
boilers. The LF uses Taco's patented
DualVision
®
technology to know the
difference between foam, water, and
LF Model
LTR Model
LTA-2 Model