__________________________________________________Chapter 4 – Smoke Control Section, Page 4-23
Smoke Control – Troubleshooting (Cont.)
Testing Voltages at the Cell Connection Points
To check for proper voltages, proceed as follows:
1.
Open the Electrical Compartment door first (the smaller door) and then the Cell/Plumbing
Compartment door. Opening the Electrical Compartment door releases the Plunger Safety Switch,
shutting off power to the transformer by releasing the micro switch, and draining residual power
from the transformer(s) by the Grounding Disc making contact with the brass grounding screws
(Refer to
Figure 4-17-1, 4-24-1 and 4-24-2).
Extreme Caution: Before removing the lead wires from Cells, a Standard Safety Voltage Test must
be conducted as described on page 4-11.
This test is necessary to insure that the Grounding Disc
made proper contact with the brass grounding screws to drain all the residual power from the
transformer.
2.
Once the Standard Safety Voltage Test has been conducted, remove the 5KV and 10KV volt lead wires
from the first Cell.
3.
Push in and tape the Door Safety Switch in the closed position (Refer to Figure 4-23-2).
4.
Connect the ground wire of the meter to the ground lead wire.
5.
By hand, push in and hold the Plunger Safety Switch. The green light should be on. Now measure
voltage from ground to the 5KV volt lead wire and then from ground to the 10KV volt lead wire. If
proper voltage is obtained it indicates an ESP Cell failure. Proceed to “Testing ESP Cells”
instructions. If there is no voltage it indicates a possible failure of the Door Safety Switch, Plunger
Safety Switch, or transformer. Following the flow chart on Page 4-22, proceed to “Testing Door
Safety Switch” instructions.
Testing Door Safety Switch
To check for proper operation of the Door Safety Switch proceed as follows:
1.
Shut off the electrical power by turning the Disconnect Switch on the Main Electrical Panel (Refer to
Figure 4-23-1).
2.
Open the Electrical Compartment door first (the smaller door) and then the Cell/Plumbing
Compartment door.
3.
Push in the Door Safety Switch, and using a continuity tester test for continuity between terminals 43
and 5R
on the terminal block.
If there is continuity the Door Safety Switch is good and proceed to
“Testing Plunger Safety Switch” instructions. If there is no continuity the switch must be replaced.
Door Safety Switch
Disconnect Switch
Figure 4-23-1
Main Electrical Panel
Figure 4-23-2
Cell/Plumbing and Electrical Compartments
