Lux Products LuxPro P521U Installation And Operating Instructions Manual page 13

5, 6 WIRES
Factory RH-RC Jumper Wire Installed
O B G
AIR
FAN
CONDITIONER
NOTE: THE BLACK TERMINAL LETTERS ARE TYPICAL, GRAY TERMINAL LETTERS ARE BRAND SPECIFIC
CONVENTIONAL (NON HEAT PUMP)
2-STAGE HEATING AND 1-STAGE COOLING
Y RC RH
G Y R
F Y1 RH
6 RC
V
SYSTEM COMMON
SYSTEM 24V
TRANSFORMER
W1 A W2 C
W W2
W1
4
STAGE STAGE
1 2
HEATER
#5
C
X
B*
O
P
T
I
O
N
A
L