BIRD TERMALINE 8745 Series, Инструкция

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5
Chapter 3 Installation
Load Resistor Connection
The compact design of the Models 8745/46 Termaline Load Resistor enables it
to be installed in very small spaces. It requires no ventilation and may be
placed at any attitude. Do not install it where the load may be subjected to
severe vibration or to physical shock.
The load is ready for connection as received from the factory. It is useful to
first check the 50 ohm input resistance of the load and record this data before
attachment (see “Maintenance” on page 9). Use the following procedure for RF
attachment.
1. Clean all conductor and insulator surfaces on the transmission line face
and, likewise, the RF input connector.
Note:
Use a dry cleaning solvent that does not leave a residue.
2. Attach the load resistor to the RF line.
Note:
Do not tighten the bolt and nut sets.
3. Use connector kits for respective models as follows:
a. Models 8745 - 3-1/8” EIA flanged, 50 ohm:
Use a 3-1/8 inch EIA coupling kit (Bird P/N 4600-020) which
includes six 3/8-16 x 1-1/2 inch bolt and nut sets, O-Ring, and
anchor bullet (center conductor).
b. Models 8746 - 3-1/8” unflanged, 50 ohm flush center conductor:
Use Bird coupling kit P/N 5-726 (RCA MI-27791K-4A) consisting of an
outer sleeve with two clamping bands and the center conductor cou-
pling bullet.
4. Rotate the load so that the warning label shows and the outlet water tube
is placed to the best advantage.
5. Secure the clamps or bolt set firmly and evenly around the RF connection.
Note:
Do not disturb the socket head cap screws that join the con-
nector section to the main housing.
Water Line Attachment
The RF Load comes supplied with standard 3/4 inch hose fittings for attaching
the water supply and drain lines. The water INLET, at the back on center and
water OUTLET, adjacent at 90°to the inlet, mate with 3/4 inch water hose con-
nectors. If the unit is supplied with the optional control system, the water flow
switch is installed on the water inlet line. See “Flow Switch (Optional)” on page 6
for alternate field installation. To connect to a rigid piping connection, replace
the water inlet and outlet hose adapters, Bird P/N 5-065-2, with ½ inch male
pipe or pipe fittings. Take special care when connecting the water lines. The
inside of the load is designed so that the water flows properly in only one direc-
tion - from the inlet to the outlet. The water flow must be kept in the proper
direction - opposite flow will cause resistor failure when power is applied.
Cooling Water Quality
Water quality is important. See “Cooling Water Quality” on page 5 for an
explanation and description. In general, any potable water is satisfactory.
This would include purified, filtered, city supply, or soft water.