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