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Morrison Bros. Co.  ‑  Dubuque, IA  ‑  800‑553‑4840

918SB‑0134 PP     rev 8‑3‑2017

!

b. If an overfill condition already exists when the “Test/Cancel” button is pressed, the Beacon will flash, 

the Channel Alarm Indicator(s) will illuminate prior to the sounding of the Audible Alarm associated 

with the “Test” mode. (see Figure 1)

c. The 918 Series Alarm indicates the following: 

•  The BATTERY LOW indicator will flash momentarily at the beginning of the cycle.

•  If the Audible Alarm is configured to sound with an alarm condition, it is loud and strong.

•  The Channel Alarm indicators will illuminate when the Beacon is not illuminated and the Audible 

Alarm is not sounding (if so configured).

•  Beacon is illuminated when the Audible Alarm is NOT sounding (if configured to sound when an 

alarm event occurs) and the Channel Alarm indicators are not illuminated.

•  BATTERY LOW indicator is NOT illuminated after the initial momentary flash.

2. If an overfill condition occurs while filling the tank, the Beacon will flash, the Channel Alarm Indicator 

(918DB and 918QB) is illuminated and the Audible Alarm will sound (if so configured).  

a. The alarm can be acknowledged and silenced by pressing the “Test/Cancel” button on the front of the 

Alarm.

b. 

If the...

i. 

Autosilence feature is enabled

 and the alarm is not silenced by the operator, the 918 Series Alarm 

will continue in the alarm state for no more than 10 minutes at which point it will silence itself. 

ii. 

Autosilence feature is NOT enabled 

and the alarm is not silenced by the operator, then the 918 

Series Alarm will continue to alarm until the battery can no longer power the device.

Use as an Interstitial Alarm

1. Should the contacts associated with an interstitial switch be activated, the Alarm will immediately go into 

an alarm state; it will sound the Audible Alarm (if so configured), flash the Beacon and illuminate the Channel 

Alarm Indicator (918DB and 918QB).  

2. 

If the...

a. 

Autosilence feature is enabled 

and the alarm is not silenced by the operator, the 918 Series Alarm will 

continue in the alarm state for no more than 10 minutes at which point it will silence itself.  

b. 

If the Autosilence feature is NOT enabled 

and the alarm is not silenced by the operator, then the 918 

Series Alarm will continue to alarm until the battery can no longer power the device.

3.To check for an alarm state once the Alarm has silenced itself, press and hold the “Test/Cancel” button for more  

than 5 seconds while observing the Beacon and the Channel Alarm Indicators (918DB and 918QB).

a. If there is an interstitial alarm state, the Beacon will flash and the Channel Alarm Indicator(s) (918DB 

and 918QB) will illuminate prior to entering “Test Mode.”

b. If there is not an interstitial alarm, then the Beacon will not flash and the Channel Alarm Indicator(s) 

(918DB and 918QB) will not illuminate prior to entering the “Test Mode.”

Maintenance

WARNINGS

• 

Fire Hazard

 – Death or serious injury could result from spilled liquids.

• 

You must be trained to install or maintain this alarm. 

Stop

 now if you have not been trained.

•  Any modification of this unit beyond what is outlined in this instruction will void product warranty. 

•  For your safety, it is important to follow local, state, federal and/or OSHA rules that apply to working 

inside, above, or around the storage tank and piping area. Use all personal protective equipment required for 

working in the specific environment.

•  This device is intended to be used as an auxiliary warning to the operator of an abnormal condition of 

the system, such as a possible overfill situation and should not be the only system in place to prevent an 

unwanted condition, such as preventing a tank from overfilling. It is the sole responsibility of the operator to 

continuously prevent any spillage regardless of the situation.

•  Tanks could be under pressure. Vapors could be expelled from tank vents, piping, valves or fittings while 

performing maintenance. Vapors could catch fire or cause an explosion. 

Avoid

 sparks, open flame, or hot 

tools when working on tank system.

•  Use a dampened cloth when cleaning the alarm enclosure to prevent static buildup and discharge.

•  The only battery approved for use with the 918 Series Alarm is the Morrison Bros. Co. battery pack part 

number 918SB--0128 2B.

•  In the event of malfunction, contact Morrison Bros. Customer Service.

Summary of Contents for 918DB Series

Page 1: ...or death Le fait de ne pas se conformer l un ou l autre des avertissements ou l une ou l autre des directives apparaissant dans ce document pourrait donner lieu des d versements de liquides dangereux...

Page 2: ...ort es cette unit autres que celles indiqu es dans ces directives engendreront l annulation de la garantie du produit Pour assurer votre s curit il est important de vous conformer la r glementation lo...

Page 3: ...the wires to the wires in the junction box of the input device s at this time Although not required it is recommended to run the wires in some type of conduit in order to protect them against possibl...

Page 4: ...ery Assembly see instructions below If the Audible Alarm still does not sound the Beacon does not illuminate or the BATTERY LOW indicator illuminates replace the Alarm Box or call Morrison Bros Co Cus...

Page 5: ...ault ENABLED OFF DISABLED 918SB 918DB 918QB 3 Channel 1 Normally Closed Open ON Normally Closed Contacts OFF default Normally Open Contacts 918SB 918DB 918QB 4 Channel 2 Normally Closed Open ON Normal...

Page 6: ...ure is disabled the Alarm will flash its Beacon illuminate its Channel Alarm Indicator s 918DB and 918QB and sound the Audible Alarm if so configured until the battery can no longer power the Alarm Bo...

Page 7: ...at is fitted with this alarm Failure to follow any or all of the warnings and instructions in this document could result in a hazardous liquid spill which could result in property damage environmental...

Page 8: ...than 10 minutes at which point it will silence itself b If the Autosilence feature is NOT enabled and the alarm is not silenced by the operator then the 918 Series Alarm will continue to alarm until...

Page 9: ...scheduled maintenance operations MONTHLY Test the battery level and overall operation of the Alarm see 2 below YEARLY Check the Enclosure for water ingress see 3 below Battery replacement instruction...

Page 10: ...Alarm Circuit Board d Disconnect the battery cable from the Alarm Circuit Board J7 Gently depress the retaining tab of the connector and pull the connector free see Figure 6 e Remove and retain the t...

Page 11: ...el Input Connector see Figure 2 m Reattach the front cover of the Alarm using the Phillips head fasteners at the four corners of the cover DO NOT OVERTIGHTEN Snug the fasteners in place and verify tha...

Page 12: ...12 Morrison Bros Co Dubuque IA 800 553 4840 918SB 0134 PP rev 8 3 2017...

Page 13: ...13 Morrison Bros Co Dubuque IA 800 553 4840 918SB 0134 PP rev 8 3 2017...

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