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50M58-289
TERMINAL
W1
W2
G
R
C
Y
YLO
TWIN
MVH (1)
PS2 (2)
FP (3)
GND (4)
TH (5)
HLI (6)
MVL (7)
MV COM (8)
TR (9)
GND (10)
HLO (11)
PS1 (12)
IGN (1)
IND HI (2)
IND LO (3)
IGN
IND N (4)
IGN N (5)
COM
1
/
" female spade terminal
4
T1
1
1
T2
1
T3
T4
1
CIRC-H
1
L1
1
XFMR
1
1
EAC-H
HUM
1
1
CIRC N
LINE N
1
1
XFMR N
HUM N
1
1
EAC N
* For TWINNING applications, use only 50M51-843 Controls
** Maximum recommended flame probe wire length is 36 inches.
50M58-289 TYPICAL WIRING TABLE
TERMINAL
TYPE
two-stage thermostat W1 terminal (or equivalent)
two-stage thermostat W2 terminal (or equivalent)
two-stage thermostat G terminal (or equivalent)
7 -screw
two-stage thermostat R terminal (or equivalent)
terminal
block
two-stage thermostat C terminal (or equivalent)
two-stage thermostat Y terminal (or equivalent)
two-stage thermostat YLO terminal
one wire twinning terminal*
gas valve SECOND STAGE
2nd stage pressure switch INPUT
flame sensor probe**
MUST BE RELIABLY GROUNDED TO CHASSIS
FP
PS2
MVH
24 VAC transformer (low voltage HIGH SIDE)
HLI
TH
GND
high limit INPUT
gas valve FIRST STAGE
MV
TR
MVL
COM
gas valve COMMON
PS1
HLO
GND
24 VAC transformer (low voltage COMMON SIDE)
MUST BE RELIABLY GROUNDED TO CHASSIS
high limit OUTPUT
1st stage pressure switch INPUT
ignitor HOT side
inducer HIGH SPEED HOT side
inducer LOW SPEED HOT side
IGN
IND
IND
IND
HI
LO
N
N
inducer NEUTRAL side
ignitor NEUTRAL side
X-13 motor low voltage return
circulator blower terminal (TAP 1)
/
" spade terminal
4
/
" spade terminal
circulator blower terminal (TAP 2)
4
/
" spade terminal
circulator blower terminal (TAP 3)
4
/
" spade terminal
circulator blower terminal (TAP 4)
4
/
" spade terminal
circulator blower HOT SIDE
4
/
" spade terminal
input voltage (120 VAC) HOT SIDE
4
/
" spade terminal
24 VAC transformer line voltage HOT SIDE
4
/
" spade terminal
air cleaner HOT side
4
/
" spade terminal
humidifier HOT side
4
/
" spade terminal
circulator blower NEUTRAL terminal
4
/
" spade terminal
input voltage (120 VAC) NEUTRAL SIDE
4
/
" spade terminal
24 VAC transformer line voltage NEUTRAL SIDE
4
/
" spade terminal
humidifier NEUTRAL side
4
/
" spade terminal
air cleaner NEUTRAL side
4
SYSTEM COMPONENT
CONNECTION
WIRING
5
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