S8910U3000
Terminal Function
Burner Ground Connection
Tranformer Secondary
(unswitched leg)
Main Valve Common
Transformer Secondary
(switched leg)
Main Valve Operator
120 Vac Neutral Leg Power Supply
120 Vac Hot Leg Power Supply
Hot Surface Igniter Element
Hot Surface Igniter Element
Flame Sensor
a
Remove quick-connect and replace with the included 1/4 in. quick-connect.
b
Use green adapter cable (provided) to connect S8910U GND (BURNER) terminal to chassis ground.
c
Do not use the S8910U VALVE (GND) terminal. VALVE (GND) and 24V (GND) are interconnected in the appliance wiring.
d
Remove quick-connect and replace with the included 3/16 in. quick-connect.
e
Do not use this terminal if model being replaced does not have 120V neutral power supply connection.
f
Use the black wire on the included adapter cable.
g
Use the orange wire on the included adapter cable.
h
On remote sense models, remove jumper quick-connect from S8910U sense terminal, cut jumper wire at circuit board and
discard. On local sense models, leave black jumper connected.
i
Remove jumper from S8910U sense terminal, cut jumper wire at circuit board and discard.
34-00008EFS—01
Table 5. Replacement Wiring Terminals.
Replacement Control
S8910U
Terminal
S89/S890 Terminal
GND (BURNER)
24V (GND)
VALVE (GND)
24V
VALVE
L2 120V NEUTRAL
e
L2 120V NEUTRAL
L1 120V HOT
e
HSI 120V NEUTRAL
HSI 120V HOT
h
SENSE
10
Original Control
Honeywell
White Rodgers
50E/F47 Terminal
a
GND (BURNER)
a
24V (GND)
a
a
VALVE (GND)
MV
terminal)
a
24V
VALVE
L1 120V HOT
HSI 120V
HSI 120V
h
SEN
Robertshaw
HS780 Terminal
GND
TR (GND CLIP)
TR
GND
c
(next to TR
—
TH
TH
d
MV
VALVE
—
L2
L1
f
L
—
IGN
IGN
g
IGN
i
h
FP
RS
b
d