LiquidWatch Installation Manual
13
3.4 Surge Suppressor
An optional Surge Suppressor (Model LWSA, part no. 8027572) is available for installations where
lightning strikes are prevalent in the vicinity of the LiquidWatch probes or probe wiring. The LWSA
includes a 10” x 8” NEMA 4X enclosure. The suppressor reduces the possibility of an induced voltage in
the cable, caused by a lightning strike, damaging the LiquidWatch panel.
Typically the enclosure is located close to the LiquidWatch Alarm Panel and is connected to it by an 18-
conductor cable (only 16 conductors are needed). The cable is installed from terminal strip P2 on the
Probe Bank 1 card in the main panel to terminal strip P3 in the LWSA. Probes 1-8 are connected to
terminal strip P1 in the LWSA instead of the original Probe Bank 1 card. A 15-conductor
communications cable is connected to terminal strip P2 if additional RPM-8s are installed.
The 12” green ground wire is soldered to the LWSA PCB and must be securely connected to earth
ground. The shield wires from all shielded probe leads and communication cables in the enclosure must
be connected to the earth ground connection.
Figure 9
Optional Surge Suppressor
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