Murphy Automobile Parts A88 User Manual

A88-8916N  
Revised 01-97  
Section 40  
(00-02-0196)  
®
AUTOMATIC ENGINE CONTROLLERS  
MODELS A88 AND A88-F  
INSTALLATION MANUAL  
 
WARNING  
BEFORE BEGINNING  
INSTALLATION OF THIS  
MURPHY PRODUCT  
Disconnect all electrical  
power to the machine.  
Make sure the machine  
cannot operate during  
installation.  
Follow all safety warnings of  
the machine manufacturer.  
Read and follow all  
installation instructions.  
 
SECTION I: INTRODUCTION  
A. The Automatic Engine Controller, Model A88 and  
8. Crank disconnect circuitry accepts the following inputs:  
a. breaker or electronic type ignition  
b. magnetic pickup  
A88-F is designed to automatically start, monitor and stop  
electric start engines. The A88 comes in an all-weather  
case with a 5 foot cable and a plug for connection. The  
A88-F is the same system, but housed in a panel-mount  
case with terminals on back for connecting.  
c. alternator tach  
d. flywheel alternator  
e. mechanical switch  
9. Has a built-in one minute time delay for customer use.  
10. Five fixed crank attempts before shutdown.  
B. Features  
1. Has a self-contained Auto-Off-Test Switch.  
2. Rest and crank time selected by a single switch.  
3. Adjustable crank disconnect speed switch.  
4. Close a switch to run; open to stop feature.  
5. Engine starts and runs when a contact closes and  
stops when a separate set of contacts close.  
6. Goes into a rest period in the event of a false start.  
7. Alarm before start to alert personnel.  
SECTION II: SPECIFICATIONS  
A. Power Requirements:  
11. An output to indicate that the engine is running  
to be used as remote indication or in warm up  
operation.  
1. Voltage 8-30 VDC, negative ground.  
2. Current @ 12 volts less load current.  
a. standby  
b. crank  
c. shutdown 32 ma  
10 ma  
140 ma  
12. Has a summary of shutdown output.  
13. Monitors the following engine functions and will  
shut the engine down in event of a failure:  
a. Overcrank  
3. Maximum fuse size, 4 amp, slow blow.  
b. Oil Pressure  
c. Engine Temperature  
d. Spare  
B. Input Requirements:  
1. Start-stop control switch  
a. SPST N.O. dry contact; close to run, open to stop  
b. SPDT dry contact  
14. Has 30 second lockout feature for start up.  
15. Output for choke actuator.  
c. Two SPST N.O. dry contacts; one, momentary  
close to run; one momentary close to stop  
2. Magnetic pickup or alternator tach requirements:  
a. voltage 2 volts, rms minimum  
b. 25 to 2000 hz crank disconnect  
c. maximum 100 volts Pk Pk  
C. Output Ratings: Source = switch to battery  
Sink = switch to ground  
1. Ignition or run relay; SPDT dry relay contacts  
rated 10 amp @ 30 VDC resistive, 6 amp @ 30  
VDC inductive.  
2. Crank output  
a. transistor  
b. transistor  
1 amp source  
1 amp sink  
3. Choke  
a. transistor  
4. Time delay  
a. transistor  
5. Summary  
a. transistor  
1 amp sink  
1 amp sink  
1/2 amp sink  
1
 
SECTION III: FRONT PANEL DESCRIPTION  
IGNITION  
A88  
CHOKE  
ON  
PICK UP  
PRESENT  
OVER  
CRANK  
Automatic  
Engine  
Controller  
OIL  
CRANK  
PRESSURE  
CRANK  
DISCONNECT  
ENGINE  
TEMP.  
CRANK  
DISCONNECT  
(Shown without enclosure)  
5s  
AUTO  
OFF  
CRANK  
10s  
AND  
REST  
TIME  
15s  
TEST  
20s  
IGNITION  
CHOKE  
ON  
PICK UP  
PRESENT  
OVER  
CRANK  
OIL  
PRESSURE  
CRANK  
A88-F  
CRANK  
DISCONNECT  
ENGINE  
TEMP.  
Automatic  
Engine  
CRANK  
DISCONNECT  
AUTO  
OFF  
TEST  
Controller  
(Shown without enclosure)  
5s  
CRANK  
10s  
AND  
REST  
TIME  
15s  
20s  
2
 
FRONT PANEL DESCRIPTION  
9. SPARE  
Along with each description, an attempt has been made This LED comes on to indicate cause of shutdown if the  
to clarify output and input connections according to their spare is used. Connect the monitor to Terminal 13 of the  
functions and terminals or wire color.  
A88-F and the yellow/white wire of the A88.  
A. Description of LED Callouts  
1. IGNITION  
Note: the overcrank, oil pressure, engine temperature  
and spare circuits are locked out for 30 seconds during  
The ignition LED will come on when the system receives start up. They require normally open sensors (close to  
a signal to start. If the alarm before start is used, this operate). A summary output is available (Terminal 20 on  
ignition LED will NOT come on until the 5 second alarm the A88-F and the brown wire of the A88.) for remote  
goes off.  
indication when a shutdown occurs.  
2. PICKUP PRESENT  
When the engine is cranking or running and the pickup is  
B. Description of AOT Switch, Crank Disconnect  
Control & Rest/Crank Time Control  
connected properly with sufficient output voltage (2 volt 1. AUTO-OFF-TEST  
rms) this LED will come on. IMPORTANT - This LED  
must come on or the unit will not operate properly.  
a. OFF  
When a shutdown occurs, this unit must be removed  
from power to reset. The Auto-Off-Test switch removes  
power when placed in the off position. The green LED  
will go off. The unit should be left off 8-10 seconds  
to allow the circuitry to discharge and stabilize.  
b. TEST  
This position is used after all connections have been  
made or for periodic checks that should be a part of a  
preventive maintenance program. The start and stop  
inputs are by-passed when this switch is placed in the  
test position. The unit will automatically initiate the  
crank cycle.  
Note: this LED will NOT be on if a mechanical switch is  
used as a crank disconnect sensor.  
3. CRANK  
The crank LED is on when the engine is cranking and is  
used to show that the crank circuitry is functioning  
properly.  
The crank solenoid will be connected to terminal 1 of the  
A88-F or the white/brown wire of the A88, if the solenoid  
is connected to positive to operate.  
If the crank solenoid is grounded to operate, connect it to  
terminal 2 of the A88-F or connect it to the white/red wire of  
the A88.  
c. AUTO  
For normal operation and after the system has been  
tested, Place the switch in this position. It indicates  
the controller will take over starting and stopping the  
engine.  
4. CRANK DISCONNECT  
This LED comes on when the crank disconnect  
adjustment is adjusted to disengage the starter. When  
this LED comes on, the crank LED goes out. (See item B-  
2 for control setting adjustments)  
Note: these units may have a 4-5 second alarm before start.  
The A88-F comes with the alarm hooked up by connection  
of terminals 16 and 17. The A88 comes without the alarm  
hooked up; if alarm is needed, ground the red/white wire.  
Although it is an optional hook up, it is recommended that  
this alarm be used to alert personnel of a start.  
5. CHOKE  
This LED will come on for approximately 3-4 seconds at  
the beginning of each crank cycle and then go out. If a  
choke or compression release solenoid is connected from  
battery positive to Terminal 3 (A88-F)or the violet wire  
(A88) it will be energized when the LED comes on.  
2. CRANK DISCONNECT CONTROL  
Adjust this control to make the crank circuit disengage the  
starter when the engine starts. Rotating it counter-  
clockwise makes the starter drop out at lower RPM.  
6. OVERCRANK  
If the engine is called on to start and fails after 5 tries, this  
LED will come on and stay on to indicate cause of  
shutdown.  
3. REST AND CRANK TIME  
By placing this switch in one of the 4 positions, the rest  
and crank time is selected. If the switch is placed in the  
10 seconds position, the system will crank the engine for  
10 seconds, then rest for 10 seconds.  
7. OIL PRESSURE  
The oil pressure LED will come on if oil pressure is lost  
during operation and remain on to indicate cause of  
shutdown. Terminal 11 of the A88-F or the black/white  
wire of the A88 are connected to the oil pressure switch.  
Note: if the engine starts momentarily, then dies, it will go  
into a 25-30 second rest period before it attempts another  
crank. This is regardless of what position the crank and  
8. ENGINE TEMPERATURE  
If the unit is shutdown because of high engine temperature, rest switch is in.  
this LED will be on. The temperature sensor is connected to  
Terminal 12 of the A88-F or the blue/white wire of the A88.  
When the system is called on to crank the first crank cycle  
will be typically 50% longer than the remaining four tries.  
This feature will aid in starting a cold engine.  
3
 
SECTION IV: OPTIONAL HOOKUPS  
In this section the terms Sink and Source are used.  
3. CRANK CONNECTIONS  
Sink: This terms refers to an output that switches to  
A88-F  
Terminal  
Output  
Operation Current  
Max.  
A88 wire color Connected  
ground to do work.  
Lamp  
Solenoid  
A Crank  
No. 1  
White/Brown  
White/Red  
Source  
1 A  
Switch  
to Ground  
Solen. to  
batt. pos.  
Sink  
B Crank  
No. 2  
Terminal  
If the crank solenoid is already connected to ground,  
connect to the unit as indicated in "A" above.  
If the crank solenoid is already connected to the battery  
positive, connect it as in "B" above.  
Source: This term will be used to refer to an output that is  
switched to positive to do work.  
Lamp  
4. ENGINE RUNNING  
Switch  
If it is desirable to know or indicate when the engine is  
actually running, connect the indicator to the battery  
positive and then as below:  
Terminal  
A88-F  
Output  
Operation Current  
Max.  
Output  
A88 Wire color  
1. CHOKE  
Terminal  
To use this feature, connect the choke or compression  
release solenoid to the battery positive and then to the  
terminal or wire shown:  
After 30  
sec. delay  
Sink  
Engine  
Running  
No. 18  
Yellow  
1 A  
After the engine has been running for approximately 30  
seconds, the indicator will be energized.  
A88-F  
Terminal  
Output  
Operation Current  
Max.  
Output  
A88 Wire color  
Choke  
No. 3  
Violet  
Sink 1 A  
5. WARM UP  
If it is desirable to have a warm up period or a 90 second  
delay after the engine has started, connect the engine  
running output to the time delay input and then connect  
the time delay to the gas feed or clutch mechanism.  
Terminal 18 to terminal 9 on the A88-F, the yellow wire to  
the violet/white wire on the A88 unit.  
At the beginning of each crank cycle, the choke or  
compression release solenoid will pull in, remain in for 3  
or 4 seconds. The maximum current this circuit can carry  
is 1 amp.  
2. SUMMARY  
Connect the clutch or gas feed solenoid to battery positive  
For a remote shutdown or alarm feature after a shutdown then to the time delay output terminal 19 on the A88-F;  
occurs, connect the alarm or lamp to the battery positive the orange wire on the A88.  
then to the terminal or wires shown:  
After the engine starts and has been running for approx-  
imately 90 seconds, the clutch or gas feed will be energized.  
A88-F  
A88  
Output  
Operation Current  
Max.  
Output  
Terminal Wire color  
1/2 A  
Sink  
Summary  
No. 20 Brown  
4
 
SECTION V: OPERATION  
Refer to Diagrams 1 and 3: Basic Wiring Hookup for Step No. 8, Clutch or Warmup Operation:  
correct connections to your engine.  
If a warm up feature is desired see Section IV:  
Optional Hookups paragraph 5 WARM UP.  
Diagram 2 shows wire colors that correspond to the A88  
plug and hookup wire, in the event of two colors the first  
color is the primary color and the other is a tracer color.  
Diagram 4 identifies the A88-F wiring terminals.  
A88  
To  
Clutch  
Control  
Batt.+  
Yellow  
Step No. 1, Pickup:  
Determine the type of pickup to be used and connect  
it to the controller as illustrated in the basic wiring  
hookup.  
Slave  
Relay  
Diode  
Orange  
Violet/White  
Clutch activates approximately 90 seconds after  
engine has started—pulls in after engine stops.  
Step No. 2, Starter Solenoid:  
Determine the type of starter solenoid used on your  
engine. In most cases it will be of the source type, that  
is, one side of the pull in coil is connected to ground and  
and the other has to be connected through the ignition  
to positive. Do not connect the controller output directly  
to the starter, always use a starter slave solenoid.  
A88-F  
To  
Clutch  
Control  
Batt.+  
18  
Slave  
Relay  
Diode  
Step No. 3, Ignition:  
9
19  
The type of ignition must be determined and wired  
accordingly. Most later models will be of the CDI type.  
Clutch activates approximately 90 seconds after  
engine has started—pulls in after engine stops.  
Step No. 4, Start/Stop  
Select the type of Start/Stop control needed and wire  
accordingly. If a close to run and open to stop is used  
be sure and connect the brown/white and the  
grey/white together. On the A-88-F connect terminals  
16 and 17. It is recommended that the alarm before  
start be used for safety.  
Step No. 9, Crank disconnect adjustment:  
To adjust the crank disconnect, disconnect the ignition  
wire or leave the fuel cut off. That will let the engine  
crank but not start.  
Turn the crank disconnect control fully clockwise (15  
turns). This control does not have a stop and it does  
not hurt it to turn it more than 15 turns.  
Step No. 5, Choke:  
If a choke or pressure release feature is needed con-  
nect the choke solenoid to battery positive then to  
terminal 3 of the A-88-F or to the violet wire of the A-88.  
Place the the crank and rest time switch in the 10 or  
15 second position. Switch the controller in the test  
position. With the engine cranking, rotate the control  
counter-clockwise until the starter drops out. Notice  
that the engine will crank longer the first time.  
Step No. 6, Shutdown:  
Connect the shutdown circuits. The spare should be  
marked or labeled on the blank space.  
When the starter kicks out, rotate the control clock-  
wise for approximately 1(one) turn. The crank  
disconnect is now set.  
Step No. 7, Time Delay:  
This system has a 60 second built-in time delay for  
customer use. If the appropriate inputs are grounded, it  
times out after the crank disconnect light comes on.  
NOTE: When installing relays or solenoids that are  
controlled by this controller always install a diode directly  
across the coil windings to help eliminate the back EMF.  
Input  
Delay  
Output  
+
A88 ground  
60  
Orange wire  
violet/white wire  
seconds  
Sinks to ground  
Solenoid  
Diode  
or  
A88-F ground  
Terminal 9  
60  
seconds  
Terminal 19  
Sinks to ground  
Coil  
5
 
Remote Annunciator Connection  
1 amp max  
Pickup Signal Source Connection  
Use Only One  
Starter Solenoid Connection  
Use Only One, 1 amp max  
To Batt. +  
To Batt. +  
To Batt. +  
To Batt. +  
A88  
Mini Auto  
Starter  
1 2 3  
To Starter  
To Starter  
Electronic or  
Breaker Type  
Ignition  
Solenoid  
Solenoid  
Switched to  
Positive(source)  
Magnetic  
Pickup  
Vacuum  
Switch  
Fly Wheel  
ALT.  
Tach O/P  
ALT  
Engine  
Running  
Shutdown  
Summary  
Switched to  
A88 cable  
Blk 18 GA  
Red 18 GA  
Ground(sink)  
Grey  
Blue  
Battery  
White/Black  
Green  
SWICHGAGE® Inputs  
Oil  
White/Red  
White/Brown  
Yellow  
Brown  
Black/White  
Temperature  
Green/White  
Brown/White  
Grey/White  
Red/White  
White  
Blue/White  
Spare  
For Momentary  
For Momentary  
Type Operation  
SPDT  
Type Operation  
Close to Run  
Open to Stop  
N.O.  
To Batt. +  
Wht/Yel  
White/Orange  
White/Yellow  
Violet/White  
C
Wht/Ong  
White  
SPST  
N.C.  
Grn/Wht  
Yellow/White  
Violet  
To Batt. +  
Brn/Wht  
Stop  
Grn/Wht  
Start  
Orange  
Brown/White  
Grey/White  
Ignition Connection  
CDI Type 6 amp max  
Ground to Kill  
Load  
1/2 A  
Grey/White No Connection  
Connect  
Ignition Connection  
Breaker Type, 6 amp max  
Red/White ground for  
5 seconds Alarm On Start  
Grounding  
Violet/White  
will cause Orange  
to Grnd 60 sec Later  
Red/White ground for  
5 seconds Alarm On Start  
Ignition Connection  
(Use only one)  
Choke Connection  
Pulls in for 3-4 sec.  
Start/Stop Control Connection  
(Use only one)  
NOTE: First is color of wire, second color is tracer.  
EXAMPLE: (White/Red)  
White is color, Red is trace color  
Diagram 1: A88 Basic Wiring Hookup  
 
Pin 1-wire-Wht/Blk: Breaker ignition I/P  
Pin 2-wire-Green: Vacuum switch I/P  
Pin 3-wire-Viol/Wht: Grnd for time delay I/P  
Pin 4-wire-Grey: Magnetic pickup I/P  
Pin 5-wire-Blue: Tach alternator I/P  
Pin 6-wire-Violet: Choke (sink) O/P  
Pin 7-wire-Wht/Red: Crank (sink) O/P  
Pin 8-wire-Yellow: Engine running (sink) O/P  
Pin 9-wire-Grn/Wht: Start I/P  
Pin 10-wire-Red/Wht: Connect #11 for alarm  
Pin 11-wire-Ong/Wht: Connect #10 for alarm  
Pin 12-wire-Black: Battery negative (–)  
Pin 13-wire-Red: Battery positive (+)  
Pin 14-wire-Brn/Wht: Stop I/P  
Pin 15-wire-Grey/Wht: Connect to #14 for close to  
run-open to stop operation  
Pin 16-wire-Wht/Brn: Crank (source) O/P  
Pin 17-wire-Yel/Wht: Spare I/P  
Pin 18-wire-Blue/Wht: Water temp. I/P  
Pin 19-wire-Blk/Wht: Oil pressure I/P  
Pin 20-wire-Brown: Shutdown summary (sink) O/P  
Pin 21-wire-Wht/Ong: Ignition relay Common  
Pin 22-wire-White: Ignition relay N.O.  
Pin 23-wire-Wht/Yel: Ignition relay N.C.  
Pin 24-wire-Orange: Time delay (sink) O/P  
Diagram 2: A88 Wiring Harness  
 
Starter Solenoid Connection  
Use Only One, 1 amp max  
Use Continuous Duty Solenoid  
Remote Annunciator Connection  
1 amp max  
Pickup Signal Source Connection  
Use Only One  
To Batt. +  
To Batt. +  
To Batt. +  
To Batt. +  
A88-F  
Mini Auto  
Starter  
1 2 3  
To Starter  
To Starter  
Electronic or  
Breaker Type  
Ignition  
Solenoid  
Solenoid  
Switched to  
Positive(source)  
Magnetic  
Pickup  
Vacuum  
Switch  
Fly Wheel  
ALT.  
Tach O/P  
ALT  
Engine  
Running  
Shutdown  
Summary  
Switched to  
Ground(sink)  
25  
26  
6
7
Battery  
5
8
SWICHGAGE® Inputs  
Oil  
2
1
18  
20  
4
11  
Temperature  
17  
16  
15  
23  
21  
22  
12  
For Momentary  
For Momentary  
Type Operation  
SPDT  
NO  
C
Type Operation  
Close to Run  
Open to Stop  
To Batt. +  
Spare  
SPST  
NC  
9
13  
3
To Batt. +  
19  
Time Delay  
Output  
Stop  
Start  
Ignition Connection  
CDI Type 6 amp max  
Ground to Kill  
16 No Connection  
Connect  
Ignition Connection  
Load  
1/2 A  
Breaker Type, 6 amp max  
Ground for 5 seconds  
Alarm On Start  
Ground for 5 seconds  
Alarm On Start  
Grounding 9  
will cause 19 to ground  
60 seconds Later  
Ignition Connection  
(Use only one)  
Choke Connection  
Pulls in for 3-4 sec.  
Start/Stop Control Connection  
(Use only one)  
Diagram 3: A88-F Basic Wiring Hookup  
 
Terminal 21: Common  
Terminal 22: Normally Closed (N.C.)  
Terminal 23: Normally Open (N.O.)  
Terminal 24: No Connection  
Terminal 25: Negative (–)  
Terminal 26: Positive (+)  
Ignition Relay  
Terminal 11: Oil pressure I/P  
Terminal 12: Water temperature I/P  
Terminal 13: Spare I/P  
Terminal 1: Crank (source)  
Terminal 2: Crank (sink)  
11  
12  
13  
14  
15  
16  
17  
18  
19  
1
2
3
4
5
6
7
8
9
26 25 24 23 22 21  
Terminal 3: Choke (sink)  
Terminal 14:  
before start  
Terminal 15:  
Terminal 4: Start I/P  
Jumper for alarm  
Terminal 5: Breaker ignition I/P  
Terminal 6: Magnetic pickup I/P  
Terminal 7: Alternator I/P  
Terminal 16: Connect to #17 for  
momentary operation  
Terminal 17: Stop I/P  
Terminal 8: Vacuum switch I/P  
Terminal 9: Ground for time delay I/P  
Terminal 10: No connection  
Terminal 18: Engine running (sink)  
Terminal 19: Time delay (sink)  
Terminal 20: Alarm summary (sink)  
20  
10  
Diagram 4: A88-F Wiring Terminals  
 
Customer Hookup for Honda Generator  
Model EM3500SX/EM5000SX  
Starter  
*
Slave Relay  
1 Amp Max  
Blue  
Grey  
Close To Run  
Open To Stop  
Charging  
Coil  
Float Switch  
*
Fuel  
Valve  
100 1/2 W  
D1  
*
Green  
Yellow  
*
R1  
*
K1  
IN4005  
Oil Press. Shutdown  
Oil  
Level  
Switch  
Ground for Alarm  
Before Start  
As shown, when float  
closes the 4-5 seconds  
alarm will then start.  
A88  
or  
A88-F  
* Customer supplied.  
Diagram 5: A88/A88-F Wiring for Honda Generator  
10  
 
Customer Hookup for Honda Generator  
Model CSX360  
* Customer supplied.  
** Starter solenoid or 10A 12V relay.  
E
Black  
*
Charge  
Coil  
E
ST  
Black/White  
Black/Yellow  
Combination  
Switch  
LO  
IG  
BAT  
Black/Red  
White/Black  
**  
*
Closed to  
Start  
Open to  
Stop  
Connect  
A88  
or  
A88-F  
Diagram 6: A88/A88-F Wiring for Honda Generator  
019699  
11  
 

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