Garnet 709-P3 RV Tank Monitor Wiring & Sender Installation - Manual Page 13

This document is page 13 of the Garnet Instruments 709-P3 RV tank monitor installation manual, photographed alongside the back of the actual 709-P3 display circuit board. The page provides installation steps for the tank monitoring system: it references Chapter 7 troubleshooting tips, describes mounting the display inside the RV by cutting a 3" wide by 1-7/8" high hole in the wall, and warns against spade connectors (crimp butt connectors or solder only). A wiring table lists four 18-gauge wires: Red (+12V power input to monitor), Black (Ground), Blue (Tank senders), and White (Pump indicator). The senders must be grounded to a single ground wire from the display, with system ground tied to the breaker panel ground. Steps 5 and 6 cover sender placement on holding tanks — requiring a flat contact area, metal clearance of at least 1" from the sides/top/bottom and 2" from the sender face, and clean surfaces for adhesive — plus measuring tank height to select sender configuration. A caution warns not to mix sender types when stacking. The photographed board shows labels: 709-P3, Made in Canada, CAN ICES-003(B)/NMB-003(B), a California Prop 65 warning, serial label 709-P3-053243, and a board date of 2018-02-20.