
INSTALLATION AND SERVICE INSTRUCTIONS FOR ATKINSON DYNAMICS
HEAVY-DUTY INTERCOMS
WARNING
The lives of people depend on your safe servicing of these products. It is
important to read and follow all instructions shipped with the products. In
addition, listed below are some other safety instructions and precautions you
should follow:
• Readandunderstandallinstructionsinthismanualbeforeser-
vicing this intercom.
• Toproperlyserviceanintercom:youmusthaveagoodunder-
standing of automotive electrical procedures and systems, along
with proficiency in the installation and service of safety warning
equipment.
• Aqualiedandcompetentelectronictechnicianmustperform
electronic circuit repairs.
• Yourhearingandthehearingofothers,inorclosetoyouremer-
gency vehicle, could be damaged by loud sounds. This can occur
from short exposures to moderately loud sounds. For hearing
conservation guidance, refer to federal, state, or local recom-
mendations.OSHAStandard1910.95offersguidanceon“Per-
missible Noise Exposure.”
• DONOTconnectthissystemtothepositiveofthebatteryuntil
servicing is complete, and you have verified that there are no
short circuits to ground.
• Inorderfortheintercomtofunctionproperly,thegroundcon-
nectionmustbemadetotheNEGATIVEbatteryterminal.
• Afterrepair,testtheintercomtoensurethatitisoperating
properly.
Failure to follow all safety precautions and instructions may result in
property damage, serious injury, or death to you or others.
A. GeneralIntercomFeatures.
The Atkinson Dynamics intercom is a heavy-duty, 2-way or 3-way, communica-
tions device designed for various heavy-duty applications. The basic model AD26-Z is
designed to operate on any 12VDC or 24VDC negative ground vehicle electrical system.
A description of the available models follows.
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