White Rodgers UNIVERSAL INTEGRATED FURANCE CONTROL 50A65-843 User Manual

Page 5

Terminal

block with

captive

screws

12-pin

connector

& harness

4-pin

connector

& harness

spade terminal

3/16" spade terminal

50A65

TERMINAL

TYPE

SYSTEM COMPONENT

CONNECTION

TYPICAL SYSTEM WIRING TABLE

* maximum recommended flame probe wire length is 36 inches.

MV (2 terminals)

HLI

HLO

GND

RO1

RO2

(1 unused terminal)

IND

IGN

IND N

IGN N

COOL

HEAT

PARK (2 terminals)

LINE

XFMR

EAC (optional)

HUM (optional)

CIR N

LINE N

XFMR N

EAC N (optional)

HUM N (optional)

E33

low voltage thermostat W terminal (or equivalent)

low voltage thermostat G terminal (or equivalent)

low voltage thermostat R terminal (or equivalent)

low voltage thermostat Y terminal (or equivalent)

(2nd wire from Y terminal goes to 24 VAC HOT side of

compressor contactor coil)

24 VAC COMMON side of compressor contactor coil

gas valve (both gas solenoids are connected in parallel)

24 VAC transformer (low voltage COMMON side)

24 VAC transformer (low voltage HIGH side)

flame sensor probe*

pressure switch INPUT

high limit INPUT

high limit OUTPUT

MUST BE RELIABLY GROUNDED TO CHASSIS

rollout switch OUTPUT

rollout switch INPUT

inducer HOT side

ignitor HOT side

inducer NEUTRAL side

ignitor NEUTRAL side

circulator blower COOL SPEED terminal

circulator blower HEAT SPEED terminal

unused circulator blower terminals

input voltage (120 VAC) HOT side

24 VAC transformer line voltage HOT side

electronic air cleaner HOT side

humidifier HOT side

circulator blower NEUTRAL terminal

input voltage (120 VAC) NEUTRAL side

24 VAC transformer line voltage NEUTRAL side

electronic air cleaner NEUTRAL side

humidifier NEUTRAL side

Auxiliary flame sense