10
Instructions for 48/50LC 07-12 Units Only
1. Step LC1. Follow steps 1 through 10 earlier in these
instructions.
2. Step LC2. The 48/50LC 07-12 units require different
wiring than is factory-attached to the W7220 Jade con-
troller. Disconnect the complete wiring harness factory-
attached to the W7220 Jade controller, as shown below
in Fig. 24. This harness can be discarded.
Fig. 24 — Remove Complete Harness Factory
Attached to W7220 Controller
NOTE: The 4-wire 48TMHSRSE--A20 harness provided with
the economizer will also NOT be used on the 48/50LC07-12
Fig. 25 — 48TMHSRSE--A20 Not Used on
48/50LC 07-12 Units
3. 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 Fig. 26
and 27.
Fig. 26 — 48LCHSRADH--A00 W7220 Controller Harness Shipped With 48/50LC 07-12 Units
IMPORTANT: This section is for economizer installa-
tion instructions on 48/50LC 07-12 units only.
