Repair; Replacing The Flow Switch; Replacing The Time Delay Switch; Replacing The Safety Light - BIRD ECONOLOAD 8730 Series Operation Manual

Repair

Never attempt to connect or disconnect RF equipment from the transmission line

Replacing the Flow Switch

1. Turn off the RF power and interlock circuitry.
2. Disconnect the RF line and AC line.
3. Disconnect the water flow switch leads at the control box.
4. Remove the defective switch and replace it.
5. Connect the flow switch leads to terminals 3 and 5.
6. Turn on the interlock ac power.
7. Turn on the coolant system.
8. Make sure the flow switch functions properly.

Replacing the Time Delay Switch

1. Turn off the RF power and interlock circuitry.
2. Disconnect the RF line and AC line.
3. Open the control box door by turning the slotted screw 1/4 turn.
4. Loosen the screw at the top of the relay clamp.
5. Press the clamp legs in slightly to release the relay.
6. Pull the relay cartridge straight out of its socket.
7. Insert the new relay cartridge and rotate it to align the opening in the
cartridge with the center post nub in the socket.
8. Make sure that the clamping prongs fit into their matching slots.
9. Tighten the clamp screw to secure it.
10. Turn on the interlock ac power.
11. Turn on the coolant system.
12. Make sure the time delay switch functions properly.

Replacing the Safety Light

1. Turn off the RF power and interlock circuitry.
2. Disconnect the RF line and AC line.
3. Unscrew the lens cover at the top of the control box to expose the bulb.
4. Gently push down on the bulb and twist counterclockwise to remove the old bulb.
5. Reverse these steps to install the new bulb.
WARNING
while RF power is being applied.
Leaking RF energy is a potential health hazard.
WARNING
Disconnect the unit from all power sources before servicing.
The unit may be energized from multiple sources.
The potential for electric shock exists.
Maintenance
12