Empire Comfort Systems DVLXG75BP90N-1 Installer's Manual page 70

Remove the 12 screws from the access hatch shown below and
carefully remove it from the firebox.
Reach into the access hatch and locate the TCO. The TCO
has two wires connected to the main body of the fireplace.
Remove these and unscrew the TCO by hand. Remove the
TCO from the fireplace, replace it, and re-attach the wires.
SECTION B-B
70
MAINTENANCE AND SERVICE
TCO
Replacing the Pressure Switch
Gain access to the pressure switch by removing the (6)
screws on the highligthed hatch below.
Remove the two silicone tubes from the pressure switch
(making note of which tube goes on each spigot).
Disconnect the two wires from the pressure switch and
remove the two screws on either side of the pressure switch
to remove it from the bracket. Replace the pressure switch
and reattach the screws and silicone tubes. The black hose
should be connected to the low pressure port and the
translucent to the high pressure port.
Wiring
If any of the original wire supplied with this unit must be
replaced, order from an Empire dealer.
Pressure Switch