Bird Technologies DA40 UHF Series-Manual - Manual (Page 31)

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Chapter 4 Operating Instructions
The Digital Air Series load has two controls, the ON/OFF switch and
the Manual/Automatic switch. When properly installed, the only
requirements to use the unit as a standby reject load are for the ON/
OFF switch to be in the ON position, and the Manual/Automatic
switch to be in the Automatic position.
Note: AC mains breaker must be set in the ON position.
Before operating the unit, make sure the fans are running or the
“automatic” light is lit. Also, confirm that the inlet air flow is unre-
stricted and the exhaust is properly vented. The unit is now ready to
accept RF power. Once the unit has been set up, there is no need for
the presence of an operator.
Automatic Mode
When the load is in automatic mode, the fans will turn on only when
the load requires forced air to keep the temperature in the RF cham-
ber below a safe limit. The fans may cycle on and off during warm-up.
This cycling is normal and is dependent upon the applied input power.
Manual Mode
When the load is in manual mode, the fans run continuously. This
mode is recommended for power levels substantially below the unit’s
power rating to prevent excessive fan cycling.
Load Operation
1. Turn on the AC power.
2. Verify all four fans are operating.
3. Select Automatic or Manual fan control.
WARNING
Exhausted air may exceed 95°C (203°F).
CAUTION
Do not operate without AC power to the load.