TE-WILBUR OPERATIONS MANUAL REV 002.22 4/27/2017
Tisch Environmental 1-TSP-AND-PM10 firstname.lastname@example.org www.tisch-env.com Page 144 of 185
1. Remove both the upper and lower left plates using a Phillips
2. The power fail relay is located on the right side of the rear panel.
3. Mark the (4) wires that are located on the relay and remove them by
pushing down on the slot with a small flat-head screwdriver – the
terminals are spring-loaded, so push down and pull the wire out.
Remove (4) wires from the power fail relay.
4. The relay can be removed from the DIN rail by placing a small flat-head
screwdriver into the plastic slot at the bottom of the relay where it is
attached to the DIN rail. Pull this outward and up, unlatching it from
the DIN rail.