(2) Remove all three top panels.
(3) To gain access to terminal block TB2 where heater element leads are connected the junction box and
control module must also be removed. See paragraphs 4-27 and 4-33.
(1) Visually inspect each heater for obvious damage, deformation, cracked or broken sheath, burnt out
spots and loose, broken or otherwise damaged leads. Replace if any damage is found.
(2) Use an ohmmeter, multimeter or other continuity tester. Check the continuity of each heating element.
(1) Tag and disconnect leads from terminal block TB2.
(2) Remove the two screws, lock washers and flat washers and remove the heater support.
(3) Remove the attaching hardware from the heater mounting bracket.
(4) Slip the bracket up enough to gain access to the top heater.
(5) Remove the retaining nut, lock washer and flat washer and slip the heater out of the bracket.
(6) Remove the remaining heaters using the same methods as (4) and (5) above.
d. Cleaning. Use a clean dry cloth to wipe dust and dirt from heaters. Do not use solvent or detergent.
(1) Position the heater mounting bracket into the top of the unit so that heaters can be mounted one at a
(2) Start with the bottom most heater to be installed.
(3) Slip the heater through the bracket hole and secure with the nut, lock washer and flat washer provided
with the heater.
(4) Install the remaining heaters one at a time. Slide the bracket down progressively as each new heater
(5) Be sure that heater isolation grommets are in place on the heater support,
(6) Place the heater support in the unit and slip the ends of the heaters through the isolation grommets
(7) Install mounting hardware in the heater support and the heater mounting bracket.
(6) See tags and wiring diagram figure 4-5 and connect heater leads at terminal block TB2. Remove the
(9) Install the junction box and control module. See paragraphs 4-27 and 4-33.
(10) Install the top panels.
(11) Connect power at power source.