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phasing of power cable and external control power connection to assure proper
fan rotation.
6. Always connect safety ground cable to a proper ground. Do not rely on a possible
grounded neutral somewhere else in the system.
7. Do not let equipment operate unattended for long periods of time.
8. Do not store or operate in rain or spray unless unit is designed for this service or
adequate protection is provided.
9. Routinely inspect all components and electrical connections for tightness and
integrity.
10. Repair any damaged or degraded components and wiring without delay.
If technical assistance, service or parts are needed, please call 800-837-8603 (24 Hours).
5.3
Setup
Consult NEC for proper wire size for all connections unless stated within this manual or
on a drawing.
1. Ensure that the test source is properly grounded, and ensure that the power
cable for the load bank is bundled with a ground.
2. Confirm all switches on the local control panel are in the “Off” position.
3. Connect the load source to the unit.
4. Connect load dump contacts, as shown.
Note: Load is disengaged when 24VDC is applied.
5. Start the test source and begin analysis.
5.4 Local Control
This load bank contains a load dump feature which de-energizes all applied load when
customer supplied contacts have a 24VDC supply provided. The contacts, tied to a
normally closed relay, are rated for 2A @ 24VDC and should be wired to TB’A’ 4-5. When
these contacts are energized, all applied load will be de-energized, and the load section
will be disabled. After being de-energized, the fan will continue to operate. If desired,
the customer may install automatic transfer switch contacts, a manual push button, or
circuit breaker for this use.
When the load bank is turned on it will default to the highest fan speed setting for a few
seconds then reduce speed to the selected level.
5.5 Failure Detection
If a failure occurs, the corresponding status indicator will be present, and the load will
be de-energized. Before reapplying a load, the failure must be corrected, and the system
must be reset by turning the load bank “Off” then “On”. As mentioned, due to the
capacitive nature of the DC power supply, the unit must be turned off and remain off for
at least one second before reapplying power.
