INSTALLATION
Units 50DJ,DK,NK034,044
1. Unpack accessory and check that package contains the
correct parts as indicated in Table 5. Items 8 through 17
and 20 are shipped in a plastic bag.
2. Remove the condenser coil panel as shown in Fig. 1.
This will allow access to the indoor section bulkhead
for installation of the main power harness (item 18) com-
ing from the main control box.
3. Install connector(s) on bulkhead access knock-out holes
as shown in Fig. 2. One or 2 connectors are used de-
pending on number of power harnesses (item 18).
4. Open main control box access doors and remove access
covers. See Fig. 3 and 4. This will allow access for the
power harness (item 18) and heater relay (item 8, 50DJ
models only) installation.
5. Install connector (item 20) on main control box bottom
surface as shown in Fig. 3.
6. Run main power harness (item 18) from the main con-
trol box terminal block to the indoor fan section as shown
in Fig. 3. Using varnish cloth (item 12) provided, secure
the harness at the connector (items 15 and 20). Use wire
ties (item 13) provided with the accessory package to
dress the harness through the condenser section. Make
sure there is no excess sagging on the harness and enough
length of wire is available for connection to the electric
heat control box.
7. Fasten power harness to the load side of the power
terminal block (TB1) in the main control box. See
Fig.4-6.
8. Install heater relays (Model 50DJ only) on main
control box using 4 screws (item 9) as shown in Fig. 4.
9. Make appropriate wiring connections to the heater re-
lays (Model 50DJ only). See Fig. 4.
10. Remove indoor fan access door frames on both sides of
the unit. See Fig. 1. This will allow ample access for
heater package (item 1) and electric heat control box
(item 2) installation.
11. Assemble the control box mounting bracket (item 7) to
the electric heat control box (item 2), using screws
(item 11). See Fig. 2.
12. Install snap bushing (item 17) on the electric heat con-
trol box as shown in Fig.7-13.
13. Fasten the electric heat control box assembly to the unit
frame as shown in Fig. 2, using screws (item 11).
14. Feed the power wire harness (item 18) through the elec-
tric heat control box snap bushing installed in step 12.
Connect the pigtails on the harness to the terminal block(s)
as shown in Fig.7-13.
15. Locate the existing control wire plug fastened to the unit
upright. See Fig. 2. Release the plug assembly and con-
nect it to the bottom of the electric heat control box (see
Fig. 2).
NOTE: Two of the BLACK wires coming out of this
plug assembly will later be connected to Limit Switch
#1 on the heater package.
Fig. 1 — Unit Assembly and Installation Access Detail; Models 50DJ,DK,NK034,044
3
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