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BMK1.5 LN Boiler 24-Month Maintenance Kit #58025-05 Instructions
Technical Instruction Document
TID-0066_0B
AERCO International, Inc.
•
100 Oritani Dr.
•
Blauvelt, New York 10913
•
Phone: 800-526-0288
6.3 Replacing the LWCO Probe/Capacitor Assembly
The replacement LWCO probe sensor comes with a capacitor assembly attached. This
procedure replaces an old probe assembly with a new probe assembly (P/N 69126).
Replacing the LWCO Probe/Capacitor Assembly
1.
Cut the shell harness wire just below the female spade connector (Figure 13). The new
LWCO assembly includes a new female connector to crimp onto the shell harness wire.
Figure 13: Removing Old LWCO Probe/Capacitor Assembly
2.
Remove the LWCO probe from the recess well on the hot water outlet piping by unscrewing
the brass coupling to which it is attached.
3.
Retrieve the new LWCO probe from the kit and sparingly apply an NSF approved pipe dope
to the threads of the brass coupling (Do NOT use Teflon tape) and install into the probe well
vacated by the old LWCO probe.
4.
The new LWCO assembly comes with a spare female connector already inserted into the
male connector, and this should be crimped onto the stripped end of the shell harness wire.
6.3.1 Low Water Cutoff (LWCO) Capacitor Integrity Test
The LWCO capacitor should be tested for electrical shorts after it has been replaced. The
LWCO Capacitor test consists of two parts as described in the next two sections. The first
procedure explains how to test for electrical shorting of the LWCO probe capacitor, while
the second procedure instructs how to perform the standard Low Water Cutoff test using
the C-More controls.
MALE SPADE
CONNECTOR
FEMALE SPADE
CONN.ON THE
SHELL HARNESS WIRE
OLD LWCO PROBE
CUT OFF WIRE
TO OLD LWCO
ASSEMBLY
HERE
OLD CAPACITOR
(COVERED BY LARGE
SHRINK TUBING)
PROBE WELL OF
HOT WATER
OUTLET PIPING
LWCO PROBE
& CAPACITOR
ASSEMBLY