Innovation - Edge [i] Installation, Operation, Maintenance Manual
CHAPTER 6
– MAINTENANCE
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9/6/2019
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6.11 LOW WATER CUTOFF (LWCO) CAPACITOR INTEGRITY TEST
If the LWCO capacitor has failed, order the LWCO capacitor
Kit, P/N
69126
, from AERCO,
and consult the Innovation 24 Month Maintenance Technical Instructions Document (TID-0094)
for replacement instructions.
The LWCO capacitor should be tested for electrical shorts every 12 months and replaced,
then tested, every 24 months. The LWCO capacitor integrity 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
Edge
Controller.
The LWCO probe is located on the front of the heat exchanger body near the top. Figure 6.11
shows its location and components.
Figure 6.11: LWCO Probe Location (INN 1350 Shown)
6.11.1 Low Water Cutoff (LWCO) - Capacitor Electrical Short Test
This test determines if there is an electrical short between the LWCO capacitor and the heat
exchanger. Perform the capacitor electrical short test as described below.
LWCO Capacitor Electrical Short Test Instructions
1. Turn OFF AC power to the unit.
WARNING!
VOLTAGES OF 220 OR 110 AND 24 ARE USED TO POWER THESE UNITS, SO POWER
APPLIED TO THESE UNITS
MUST
BE REMOVED BEFORE PERFORMING THE
PROCEDURE DESCRIBED BELOW. SERIOUS PERSONAL INJURY OR DEATH MAY
OCCUR IF THIS WARNING IS NOT OBSERVED.
2. Remove the Shell Harness Cable (male) connector from the P-5 (female) connector on the
rear panel of the Edge Controller (see Figure 6.11.1-1).
Capacitor Assembly
(Covered by Large
Shrink Tubing)
Connector
(To Shell Harness)
Plastic Acorn Nut
LWCO Probe
Terminal
PARTIAL LEFT SIDE VIEW
LWCO Probe