1-17
1.11.2 ATO (Automatic Top-Off) Board Pin Positions and Harnesses
Connector From/To
Harness
#
Pin
# Function Voltage
Wire
Color
J8
RTI Add Solenoid
8074671
1 24VAC
Ret
24VAC Black
2
3
ATO Pump Relay
4 24VAC
Ret
24VAC Black
5
6
7
JIB Reset Switch
8 JIB
Low
Reset
16VDC
Black
Bulk Fresh Oil Solenoid
9 24VAC
24VAC Red
10
11
ATO Pump Relay
12 24VAC
24VAC Red
13
14
15
JIB Reset Switch
16 Ground
16VDC
Red
J4 (Rear) /
J5 (Front)
Transformer 8074553
1 24VAC
Ret
24VAC
Orange
2 24VAC
Blue
3
4
5 12VAC
Ret
12VAC
Red
6 12VAC
Brown
ATO 4 & 5 Battery
Jumper
8074657
7 Jumper
Ohm
Black
8 Jumper
Black
J1 - Vat #1
J2 - Vat #2
J3 - Vat #3
ATO RTD
8262569- Probe
Kit,
8074845 – 28”
Ext., 8074655 –
20” Ext.,
1
DV - Probe Ground
Ohm
White
2
DV - Probe
Red
3
FV - Probe Ground
White
4
FV - Probe
Red
J6
1
2
J10
Network Resistor
(pins 2 & 3)
or to next ATO Board (4
& 5 vat units)
8074552
(Network
resistor),
8074546 to next
ATO board
1 Ground
Black
2 CAN
Lo
Red
3 CAN
Hi
White
4 5VDC+
5VDC
Black
5 24VDC
24VDC
Red
6 Ground
White
J9 AIF
J5
8074547
1 Ground
Black
2 CAN
Lo
Red
3 CAN
Hi
White
4 5VDC+
5VDC
Black
5 24VDC
24VDC
Red
6 Ground
White
