MORTEX G18D SERIES - Page 9

MORTEX PRODUCTS INC 501 TERMINAL RD FORT WORTH, TX 76106 Page 9
2. Pull back on the top of the return air grille door until it pops
out of the retainer clip.
3. Let the top of the door fall outward and then lift up slightly
and outward and set the door on the oor.
4. Remove the center retaining bracket by pushing down on the
left side of the bracket then use a small at blade screwdriver
to pry it out.
5. Remove both air lters from the door. These lters are
disposable lters. Do not attempt to clean the lters and reuse
them.
6. Insert the replacement air lters in the door.
7. Place the center retaining bracket between the 2 air lters.
Slide the bracket under the ange on the left side of the door.
Place a at blade screwdriver between the bracket and
the right side door ange and slide the bracket past the door
ange until the bracket is back into place. Use a rubber mallet
to straighten the right side door ange if necessary.
8. Lift the door up against the cabinet and align the slots in the
bottom of the door with the tabs on the divider panel.
9. Push the door forward lining up the plastic door strike in the
top cover with the hinge in the door.
10. Push the top of the door on the left side forward until the door
strike snaps into the latch.
11. Push the top of the door on the right side forward until the
door strike snaps into the latch.
Follow the “Starting the Furnace” instructions in Section 3:
Startup and Shutdown Instructions on page 7 of this
manual.
Optional Return Air Filter Grille
Some installations may utilize one or more eld supplied return
air lter grilles that has been installed in the closet or alcove wall
above the furnace. If there are no lters in the furnace louvered
return air door, look for a return air lter grille or grilles on the wall
the closet or alcove. To replace the lters in a return air lter grille,
turn the thumbscrews or levers on the face of the grille door and
allow the grille door to fall outward providing access to the lter.
Replace the air lter in the return air lter grille with the same size
and type lter that was removed. Once the new lter is in place,
close the grille door and secure it with the thumbscrews or levers.