Bird Technologies 8329-300 User Manual
Page 19
Thermo-
switch
As an optional item, the attenuator can be provided with a
thermoswitch assembly (P/N 8329-028). When the ther-
moswitch is installed, it prevents possible damage from acci-
dental power overloading from the transmitter or
equipment malfunction. The thermoswitch is normally
closed and opens at a maximum safe temperature of +200°C
(+392°F). Since the thermoswitch is connected in series with
the transmitter interlock, it cuts off the transmitter power if
the coolant temperature exceeds this value. The assembly
consists of:
s
Thermoswitch body - P/N 8329-027
s
Coupling Jack - P/N 2450-018
If the thermoswitch is to be field installed, proceed as fol-
lows:
1. Replace the vent plug with the ship-
ping plug.
2. Stand the unit on its back end with
the input connector end up.
+
Note: In this position there is no danger of the
coolant pouring out through the socket plug
hole.
3. Remove the socket plug located just
above the connector on the front face
of the radiator. Use a 9/16 hex wrench.
9
Operating Instructions
O-ring seal
Figure 2
Shipping Plug
O-Ring Seal
Figure 3
Vent Plug
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