Bird Technologies 8650B Series - Manual (Page 30)

Bird 8650 Series Moduload RF Load Resistor
18
Flushing the System
Whenever maintenance work has been performed, including resistor repair, or
there is a reason to suspect that contamination has been introduced or dis-
lodged into the coolant, the system should be thoroughly flushed.
1. Run the load with coolant but without RF power applied for a period of
three to five minutes.
2. Drain the circulating system as completely as possible.
3. Fill the unit with fresh, clean, distilled water.
4. Repeat steps 1 - 3 until the drained liquid is clear.
5. Fill the unit with distilled water and/or approved ethylene glycol mixture.
See “Coolant” on page 9.
Note: If the unit is to remain fully or partially drained for two
weeks or more, see “Storage” on page 28.
Repair and Replacement Procedures
The 8655B/56B Moduload Load Resistor is designed for independent, long term,
trouble-free operation. Regular mechanical maintenance procedures, other than
routine checks and cleaning care described previously, are not required. In the
case of malfunction of the unit or replacement of a major component, resistor
repair excepted, the entire load may be returned to the factory. This applies
especially to any unit under the one year warranty. Consult the factory.
Note: Do not tamper with operational settings or perform other
unauthorized maintenance work during the first year. It could be cause
to void the warranty.
Field repair of the load resistor may be performed as described in the Load
Resistor Internal Repair paragraph. Other replacement instructions, that
might be needed, are given in this section.
If in performing the DC resistance check a significant change in resistance is
noted, or if for any reason the resistive element should fail, the element
should be replaced. Replacement resistors are available.
WARNING
Disconnect from RF power sources and the AC line before any disassembly
or service. Electrical shock hazard.
CAUTION
Incorrect hose connections will reverse coolant flow and could destroy the load.
WARNING
Disconnect from RF power sources and the AC line before any disassembly
or service. Electrical shock hazard.
WARNING
Improper wiring could result in electric shock and death.