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MegaSteam
Installation & Service Manual
How to Pipe
A “tee” is commonly used to connect the probe
LWCO to the supply or return piping, as shown
below.
Select the appropriate size tee using the LWCO
manufacturer’s instructions. Often, the branch
connection must have a
minimum
diameter to
prevent bridging between the probe and the tee.
Also, the run of the tee must have a minimum
diameter to prevent the end of the probe from
touching or being located too close to the inside
wall of the run of the tee.
LWCO Location
Wiring of Typical LWCO
Appendix B
After Market Low Water Cut-off (LWCO)
WARNING
DO NOT ATTEMPT to cut factory wires to install an aftermarket Low Water Cut Off (LWCO).
Only use connections specifically identified for Low Water Cut Off.
In all cases, follow the Low Water Cut Off (LWCO) manufacturer's instructions.
!
How to Wire
LWCO’s are available in either 120 VAC or 24 VAC
configurations. The 120 VAC configuration can
be universally applied to both gas and oil boilers
by wiring it in the line voltage service to the boiler
(after the service switch, if so equipped).
The presence of water in a properly installed
LWCO will cause the normally open contact of the
LWCO to close, thus providing continuity of the
120 VAC service to the boiler.
It is recommended to supply power to the probe
LWCO with the same line voltage boiler service as
shown below.
