Lux Products LuxPro P521U Installation And Operating Instructions Manual page 14

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