Lincoln Electric MASTER LOAD IM575 - Manual (Page 6)

v LOAD BANK SAFETY v
The load bank is an industrial test unit designed to be
used indoors or outdoors (sheltered from moisture).
However, because the nature of the load bank’s func-
tion is the dissipation of electrical energy, electrical
energy is transformed into heat by the resistor ele-
ments.
The heat is removed from the load bank by
airflow through the resistor elements. If there are any
restrictions or stoppage of airflow, the load bank may
overheat. For safe operation the following recommen-
dations should be observed:
1. Read the manual before operating the Load Bank.
2. Run an approved ground wire from the Load Bank
ground lug located on the connection panel to the
frame of the power source.
Run an approved
ground wire from the power source frame to a
good earth ground. Size ground wire in accor-
dance with National Electrical Code and any local
codes.
3. Do not bypass the airflow safety switch or temper-
ature sensing switch to prevent nuisance tripping.
The switches will drop out the load if insufficient
cooling air is reaching the elements.
4. Replace any burned out lamps on the control
panel.
Each lamp is an indication that a system
is active or has failed and is important to the oper-
ation of the unit and safety of the operator.
ELECTRIC SHOCK can kill.
Personal injury from electrical shock
may result if all sources of power are
not disconnected before servicing.
Only qualified personnel should
Install, Operate and Service this equip-
ment.
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5. Maintenance should be performed with no power
on the unit.
The majority of troubleshooting can
be performed with an ohmmeter. There are mul-
tiple sources of input power to the Load Bank.
Insure each is disconnected.
6. Venting the heated air from the exhaust toward
overhead cables, sprinkler systems, or into a
room with insufficient volume or "Make-Up" air, is
a potential hazard.
The Load Bank should be
used in a cool, well-ventilated area.
7. Allow cool room air to pass into the unit to cool
the elements. Do not allow the unit to be placed
where hot exhaust air can recirculate back
through the unit causing a constant rise in cooling
air temperature.
8. After running a load test, residual heat may be
removed from the load bank by allowing the blow-
er to operate for a few minutes after load is
removed. This procedure is not required for load
bank integrity, but it may guard operating person-
nel from possible burn injuries.
9. The operator should avoid coming in contact with
the resistor elements or surrounding covers during
and for some time after operation.
These por-
tions of the load bank become hot .
10. Do not allow objects to enter or block the air
intake or exhaust of the load bank. A blockage
would cause overheating. If an object enters the
screens, it may cause damage to the resistor ele-
ments, possibly shorting them and causing shock
and fire hazards.
11. Emergency Shutdown Procedure
A. In an emergency, shut down the MASTER
LOAD switch, then the power source. The
MASTER LOAD switch will allow disconnec-
tion of all load steps and still allow for the fan
motor to run, cooling any heated elements.
B. The POWER ON/OFF switch will disconnect
both load steps and fan motor. The power
source EMERGENCY OFF switch should be
located near the load system.
12. An approved electrical fire extinguisher should be
on hand at all times.
13. It is the responsibility of the customer to take dili-
gent care in installing the Load Bank. The
National Electrical Code (NEC), sound local elec-
trical and safety codes, and the Occupational
Safety and Health Act (OSHA) should be followed
when installing the equipment to reduce hazards
to persons and property.
14. Flammable objects (cardboard, paper, etc.) must
not be stored near the load bank
15. As part of your safety program, an initial inspec-
tion after receiving the unit(s) and periodic preven-
tive maintenance and safety inspections should
be conducted to insure the reliability and safety.
WARNING