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400B SERIES ELECTRIC DIAPHRAGM PUMPS
Installation Best Practices
• All discharge hoses should be a minimum of 1" diameter. Large
sizes may be used as long as it terminates to a 1" diameter at the
discharge outlet of the pump.
• Hoses greater than 20' may be used, however, reduced outlet flow at
the end of the hose or nozzle should be expected. Flow is dependent
on the cP of the fluid as affected by temperature and elevation.
Electrical Installation
DANGER
Be certain the power switch is OFF prior to connecting the battery clamps/power cables to the power source to prevent unexpected starting of
the motor. Unexpected motor start can cause unintended discharge of fluid, creating explosion/fire/chemical spill hazards.
WARNING
Never disconnect the power cable while pump is switched on. Always switch the pump off PRIOR to disconnecting the 12V DC battery clamps or the
110V AC plug from the power source. Electrical sparks or short can occur if not disconnected properly.
Electrical wiring installation should ONLY be performed by a licensed electrician in compliance with all local, state, and national electrical
codes (NEC/ANISI/NFPA 30, 30A, and 70) as appropriate for the intended use of the pump.
DC Power
NOTICE
Various models of the 400B Series are direct current (DC) through either an explosion-proof or non-explosion proof motor at either 12V DC or
24V DC power. These same models may or may not have supplied cables for connection to either a positive or negative battery terminal.
For 12V DC circuits, a 30 amp fuse (20 amp fuse on 24V DC motors) should be installed on the battery cable to protect the electrical system in
case of a short. This fuse should be placed on the positive cable.
• Sotera strongly recommends grounding the pump and motor prior
to any usage.
• Electrically bonding to a vehicle frame or utilizing a ground circuit
for stationary applications are preferred grounding methods. Always
consult with a licensed electrician for your application.
• Inspect any and all power and grounding cables prior to each use.
Replace if the outer protective jacket has been removed to expose
any wires.
• For 12V DC non-explosion proof motors, the power cable terminates
with battery clamps that are either red (+) or black (-); however a
ground wire is not included.
• For 12V DC explosion-proof motors, in general, neither a ground
wire, power cable, or battery clamps are provided. See pages 14-15
for specific included components.
• DO NOT connect the ground wire to the negative post of the
DC power source.
• All non-explosion proof 12V DC models come with a preinstalled
power wire. 12V DC models will have a 30 amp fuse holder and fuse.
• 12V DC and 24V DC explosion-proof models will not have a power
cord installed but may include a power cable separately, depending
on model configuration.
sotera.com
(Discharge Side of Pump)
• Always use hoses and accessories that are compatible to the
product being transferred. For hoses, as a general practice Sotera
recommends EPDM for agricultural chemical and Nitrile or Buna-N
for petroleum-based oils and lubricants.
GREEN
BLACK−
1
2
EARTH / CHASSIS
GROUND
Utilizing the diagram above, proceed with the following
connections:
1. Ground connection (green clamp or eyelet)
2. Negative connection (black clamp)
3. Power connection (red clamp)
OPERATION MANUAL
RED+
3
12 VOLT
6
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