Hog Slat- HS650 Photohelic Gauge Replacement Wiring Installation Manual

Hog Slat Inc. Newton Grove, NC USA June 2019 2 Ventilation Systems Replacement Instructions: 1. Disconnect all electrical power to Ventilation Controller. 2. If replacing an Old Style gauge identified by a Gray color terminal block at the back of the gauge, refer to steps 3 through 6 for instructions for properly wiring in the HS650 as a direct replacement. 3. On the existing gauge, label wires as shown in Figure 1 using identifiers of A, B,C,D and E. 4. Disconnect wires from existing gauge. 5. Disconnect clear poly tubing from existing gauge. Note location of each tube before removing from gauge so they can be replaced in the same port on the HS650. Remove existing gauge from enclosure. 6. Remove (2) ¼” hex head screws from gray plastic cover. Remove cover and discard. 7. Install HS650 gauge and attach labeled wires as shown in Figure 2. FIGURE 1: OLD STYLE GAUGE WITH GRAY TERMINAL BLOCK ON BACK ON UNIT FIGURE 2: HS650 GAUGE WITH BLACK TERMINAL BLOCK ON BACK ON UNIT