Chapter 4 – Smoke Control Section, Page 4-28__________________________________________________
Smoke Control – Troubleshooting (Cont.)
Testing Inner Cells
Note: the next set of tests requires two test wires with an alligator clip on each end.
Note: the next set of tests requires removal of all the Inner Cells. ClearAir units wider than 2 Cells
wide the 3
rd
and 4
th
Cells are difficult to remove without the use of a long handled tool. A common
garden hoe makes an excellent tool for this purpose.
1.
Open Electrical Compartment and Cell/Plumbing Compartment doors.
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 all lead wires from the Outer
Cells
by pulling forward from the Cell terminals. Route the wires up onto the Wire Hook at the top
of the compartment and down the left side into the Holding Channel to keep out of the way while
removing the Cells (Refer to Figure
4-18-1)
.
CAUTION: Each Cell weighs 53 lbs. and may be awkward to handle, particularly Cells in the
upper racks rows #3 and #4. It is highly recommended that a heavy duty steel wheeled ladder
be used in removing the upper Cells. Extreme care must be taken to avoid damaging the Cell. Do
not grip or push on the Cell plates or the ionizer wires.
3.
Remove all the Outer Cells and place off to the side.
4.
Slide all the first set of Inner Cells to the Cell opening. Attach one end of an alligator clip wire to the
Grounding spring connection point on the Cell and the other end to the end of the Ground lead wire
(Refer to Figure 4-29-1).
5.
Attached one end of an alligator clip wire to the 5KV spring connection point on the Cell and the
other end to the end of the 5KV lead wire (Refer to Figure 4-29-1).
6.
By hand, push in the Plunger Safety Switch and hold. Now measure voltage from ground on the Cell
to the 5KV volt connection point. Voltage should be between 4,700 and 5,500 volts DC. If proper
voltage is not obtained it indicates that the Cell Plates are shorting out. Proceed to “Shorting Cell
Plates” instructions on page 4-29.
7.
Release the Plunger Safety Switch and check for voltage before removing the alligator clip from the
5KV spring connection point.
8.
Attached one end of the alligator clip wire to the 10KV spring connection point on the Cell and the
other end to the end of the 10KV lead wire.
9.
By hand, push in Plunger Safety Switch and hold. Now measure voltage from ground on the Cell to
the 10KV volt connection point. Voltage should be between 9,000 and 11,000 volts DC. If proper
voltage is not obtained it indicates an Ionizing Wire is broken. Proceed to “Replacing Ionizing Wires”
instructions on page 4-30.
10.
Release the Plunger Safety Switch and check for voltage before removing the alligator clip from the
Ground and the 10KV spring connection point.
11.
Repeat steps #4 through #10 for any additional set of Inner Cells.
