Bird Technologies 8650B Series - Manual (Page 31)

Maintenance
19
RF Load Assembly
Removing the RF Load
Note: The full load assembly may be removed from the case as in
the following procedure.
Note: Resistor repair in the load may be done without removing
the water connections; see “Load Resistor Internal Repair” on page 23.
Note: Notice the angular position of all elbows and associated
parts as they must be returned to relatively the same position when
reassembled.
z Equipment Needed:
z
Common hand tools
1. Turn off RF power and interlock circuitry before any electrical disconnec-
tions are made.
2. Disconnect the RF coaxial line.
3. Remove the 3/8-16 bolt and nut sets that secure the flanges.
4. Separate the transmission coaxial air line from the load connector.
Note: Make sure the center conductor bullet remains in the trans-
mission line.
5. Take off the top panel by removing the 26 screws around its perimeter.
6. Turn all four handles outward and slightly lift up the top panel assembly.
7. Reach under the top panel and press the connector latch of the fan power
cable.
Note: This will disconnect the small fan-supply plug from its mat-
ing connector seated on top of the radiator block.
8. Unscrew the drain plug located at the bottom center of the rear panel.
9. Allow the coolant to drain.
Note: Do not replace the drain plug with any substitute plug, use
the plug removed.
10. Unscrew both hose clamps on the water connections to the load resistor.
Note: The water inlet is through the pressure switch tee fitting at
the back of the load. The water outlet is located on the lower side of the
load.
11. Disconnect the orange wire and black wire from the pressure switch
(located at the load input).
12. Disconnect the black, white, and greens wires from the pump power cable
located at the terminal block on the inside of the front panel.
13. Disconnect the six-pin front panel connector located at the in-line connec-
tor on the top of the radiator bracket near the front panel.
WARNING
Never attempt to connect or disconnect an RF transmission line while
power is on at the RF power source. Radiated RF energy is a potential
health hazard.