Carrier 68RV11302A - 3.4 CEILING UNIT - DUCTED SYSTEMS

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3-4
3.4 CEILING UNIT -- DUCTED SYSTEMS
3.4.1 Filter Removal
The filters (Figure 3-9) are located in the ceiling grill. To
remove the filters, do the following:
a. Grasp theedge of thefilterat recessin theend of the
ceiling grill.
b. Pull filter completely out of the filter slot.
c. Vacuum filter or wash filter in luke--warm water.
Shake off excess water and dry thoroughly.
d. Replace filter by sliding the filter into the filter slot in
the ceiling grilluntil thefilterframeis flush with thein-
terior grill.
Filters
Operation Indicators
Figure 3-9 Filter Removal -- Ducted Unit
3.4.2 Ceiling Grill Removal
Toremovetheceilinggrill(Figure3--10)dothefollowing:
a. Before working on unit placethe master switch in the
OFF position and disconnect all electrical power.
b. Remove filters (Refer to paragraph 3.4.1).
c. Remove 4 screwslocated onthe ceilinggrill, (twoare
underthefilters)making sureto supportthe weight of
the grill.
d. Lower the ceiling grill from the ceiling panel.
e. To replace the grill, place the grill up against the ceil-
ingpanelandalignthescrew holesinthe grill withthe
ceiling panel.
f. Replace 4 screws and 2 filters.
3.4.3 Control Box Assembly Removal
To remove the control box assembly (F igure 3-11 &
Figure 3-12) do the following:
a. Remove ceiling grill. Refer to paragraph 3.4.2.
b. Disconnect 115 volt (AC) and 12 volt (DC) power
wires.
c. Remove two screws securing control box cover to
control box assembly. See Figure 3-11.
d. Remove control box assembly cover.
Mounting Screws
Figure 3 -10 Ceiling Grill -- Ducted
e. Disconnect blue furnace wires.
f. Unplug two connectors from upper unit.
g. Unplug DC power plug #1 (red/yellow/black wires)
SeeFigure3-12
h. Unplug relay signal plug #2 (brown/red/orange/
yellow wires). See Figure 3-12
i. While supporting control box assembly remove two
screwssecuring controlbox assembly to ductedceil-
ing unit.
j. Pullcontrolboxassemblyfromtheductedceilingunit.
k. Reverse above procedure to reassemble.
Control Box
PCB Cover
Fuse
Control Box
Cover Screws
PCB Cover
Screws
Figure 3 -11 Control Box & PCB Cover