PM3-24V Series Manual
Copyright© 2012, Fieldstone Products Inc. Fieldstone Products Inc. reserves the right to make changes in the product at any time,
without notification. Install Guide PMxx-24-3 19 October 2015
FOR YOUR SAFETY, READ ALL INSTRUCTIONS BEFORE INSTALLATION AND OPERATION.
INSTALLER: Provide these instructions to the end user or consumer.
CONSUMER: Keep these instructions for future reference.
NOTICE: Products are not to be used nor are warranted in aerospace, medical or life safety applications.
120 VAC is present. This Converter/Charger is designed to convert 120 VAC to 24 VDC. It also provides power for
charging a 24V battery assembly (90Ah minimum capacity). This Converter/Charger is a “switch mode” type and is
designed to be maintenance-free with no user serviceable components. The Converter/Charger power output is “current
limiting” by design.
NEVER store electrical devices in compartments where flammable liquids (such as gasoline) exist.
DO NOT mount/install unit in compartments designed for storage of batteries or flammable liquids.
AC to DC Converter/Char
g
e
r
AC to DC
CONVERTER/CHARGER
PM3 model 20, 25, 30, 40 and 50 Amp
24 Volt with 3 Stage Charging Option
Installation & Maintenance
1. DISCONNECT VEHICLE/DEVICE DC POWER. Disconnect the vehicle/device battery POS (+) wire at the battery end before
connecting this Converter/Charger to any vehicle/device wiring.
2. LOCATION. The mounting location may be on any interior (out of direct weather) surface. Location chosen must be accessible
after installation. When mounted inside a cabinet, the cabinet must be large enough to allow dissipation of heated air. Make
sure that there is a minimum of 1” (one inch) free air space
at each end of the unit so that cooling air can move through the unit
properly. AVOID foreign contaminants such as dirt, metal particles or moisture.
3. MOUNTING. Flanges with holes are provided for ease of mounting using standard fasteners. Confirm that the surface that the
converter is mounted to is solid and will hold the weight (9 lbs) during vehicle operation.
4. ELECTRICAL REQUIREMENTS. A 120 VAC receptacle needs to be located within 36 inches of the Converter/Charger to
supply power. Electrical consideration should also be given to mounting near the locations of the batteries and the 24 VDC
distribution panel.
5. ELECTRICAL CONNECTIONS. Be sure to tighten all connections securely. A loose connection can quickly cause terminals
and wires to overheat. Review unit labels for recommended terminal torque values.
120 VAC Connection
– First confirm that the 120 VAC power source AC circuit breaker(s) are in the
turn-on AC circuit breakers until installation is complete.
position. DO NOT
Using 10 AWG minimum size copper wire, attach from the vehicle/device chassis to the Converter/Charger Grounding Lug.
Using the attached power cord on the Converter/Charger, connect firmly to the 120 VAC receptacle
off
WARNING – Avoid Possible Injury or Death
SAFETY ALERT
WARNING – Avoid Personal Injury or Product Damage
WARNING – Avoid Possible Injury or Death
7. Never Leave the PowerMax PM3-XX unattended when plugged in.
8. All PM3 Products must be installed by a certified electrician.