Maintenance
14
Replacing the RF Connector
Note:
The RF Coaxial connector consists of the inner conductor [26 or 30] and the outer conductor [28
or 31] respectively. See
.
1.
Remove the six 1/4-20 x 1 inch socket head cap screws [20] from the flange of the front housing assembly [19].
.
Note:
The outer conductor will come off exposing the center conductor and insulator.
2.
Grasp the center conductor assembly and gently pull it off the front housing.
Note:
Usually the resistor [13] and flow tube [21] will remain in place in the housing when the center
conductor assembly is removed. In some cases, one or both of these parts will come out with the center
conductor assembly. This is not a problem and they can be separated from the front center conductor
assembly and reseated in the housing without consequence.
3.
Remove the 3/8-16 x 3/4 inch screw and lock-washer set [27] located inside the center conductor.
Note:
Use a 5/8 inch socket wrench set with an extension for the screw.
4.
Insert a 5/32 inch rod, or equivalent, through the holes in the fitting to hold the resistor fitting [22].
5.
Replace the center conductor assembly by gently manipulating the assembly until it is thoroughly seated in
place.
6.
Reassemble the RF Connector assembly by reversing this procedure.
Replacing the Water Flow Switch
Note:
Procurement and use of the accessory protective control system (comprising the water flow
switch and control box) is optional. The instructions and replaceable parts described in this section are only
applicable when the optional equipment is installed.
The water flow switch should be checked and cleaned of any accumulated dirt or scale that might impede free
movement of the control gate in the switch. This should be done after several months use, or sooner if indicated by
erratic operation. This component is not repairable and if found defective, it must be replaced.
1.
Make certain the RF power, AC line power, and the transmitter interlock supply are turned off.
2.
Disconnect the leads at the water flow switch.
3.
Remove the defective switch from the plumbing.
4.
Install the new unit.
5.
Reconnect the flow switch leads.
6.
Perform the pre-operational checkout. See
"Preoperational Checkout" on page 5
CAUTION
Do not use any pliers or wrenches on the resistor fitting [22] as damage to its surface
may result.
