TE-WILBUR OPERATIONS MANUAL REV 002.15 06/11/2015
Tisch Environmental 1-TSP-AND-PM10 email@example.com www.tisch-env.com Page 142 of 183
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.