10
Since 1965
MicroMetl
Step LC1.
Follow steps 1 through 10 earlier in these instructions.
Step LC2.
The 48/50LC 07-12 units require different wiring than
is factory-attached to the W7220 Jade controller. Disconnect the
complete wiring harness factory-attached to the W7220 Jade
controller, as shown below in Figure 24. Set this harness aside as
a small section may be used for LC units, see Figure 27.
Instructions for 48/50LC 07-12 Units Only
Important: This page is for economizer installation instructions on 48/50LC 07-12 units only.
Figure 24 – Remove Complete Harness Factory-
Attached to W7220 Controller
Figure 24A – 9962-0407-SAOEXT
Not Used on
48/50LC 07-12 Units
Note: The complete 4-wire 9962-0407-SAOEXT harness provided
with the economizer will also NOT be used on the 48/50LC07-12
units, see Figure 24A. However, a small section may be used for
the MAT, see Figure 27.
Step LC3.
The 48/50LC 07-12 units that do not have a factory-
installed economizer will have a new Jade W7220 controller wiring
harness shipped in the control box section of the HVAC unit. This
harness, Carrier part number 48LCHSRADH—A00, is shown
below in Figure 25 and 26.
Figure 25 – 48LCHSRADH--A00 W7220 Controller Harness Shipped With 48/50LC 07-12 Units
