7000 Series Owners Manual

5. INSTALLING MULTIPLE UNITS:
On systems where the airow is over 6,000 cfm, multiple model 7300s or 7400s will be required. Wire them as
shown below:
OPERATION
1. When power is supplied to the ionizer and the
switch is in the “on” position, the ionizer will
be activated and will illuminate the green ion
indicator light. (See gure 3)
2. The ionization unit is self balancing and does not
require any type of adjustment.
3. The benet of the ionization unit is realized only
when the supply fan is running. Therefore, to
achieve improved air quality, interlock the ionizer
to run when the supply fan is powered.
MONITORING CIRCUIT
4. The 7000 Series ionizers include a monitoring circuit to verify operation status. The circuit consists of a relay with
isolated normally open contacts. The contacts remain open whenever the ionization unit is not powered or if there
is a fault in the equipment. The contacts close whenever the ionizer is energized and producing ions. Connect the
monitoring control wires to the Building Automation System (BAS) dry contacts on the unit. (See gure 2)
TROUBLESHOOTING & MAINTENANCE
The 7000 series ionizer should be inspected annually to ensure optimal performance. If any dust has built up on the tip
of the ionizing needle, this can be removed using a simple cotton swab or compressed air.
If the unit is not working, check in the following order that:
1. The ionization unit power switch is on, the supply fan is running and that the green light illuminates.
2. Check the power input connections to the ionization unit. Verify all connections are correct and tightened.
Reconnect any loose wires as necessary.
3. Test the BAS alarm dry contacts using a multimeter set to continuity mode (Ohms symbol). If the multimeter
buzzes the circuit is continuous and operation is normal. If it does not buzz the circuit is broken. Verify other steps
and contact support if needed.
4. If the unit’s internal fuse is blown, wait 2 minutes to allow the unit to automatically reset the fuse. Turn on power
to the unit. If the fuse blows again, return the unit to the factory for service.
SEQUENCE OF OPERATION
1. For units that are interlocked with the supply fan control, the BAS controls the start/stop of the air conditioning
unit supply fan.
2. After a 1 minute time delay on a call for supply fan operation, the BAS poles the ionization unit.
3. Open contacts indicate a fault; closed contacts indicate normal operation.
PLASMA AIR 35 MELROSE PLACE, STAMFORD, CT 06902
phone [phone] fax [phone] www.plasma-air.com [e-mail]
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FIGURE 3 – Right view of ionizer
ON/OFF
SWITCH
GREEN LED
IONIZATION
INDICATOR
LIGHT
PSU PSU PSU
24V AC
12V DC
or
MODEL
7400
MODEL
7400
MODEL
7400
FIELD WIRING BY CONTRACTOR WIRING BY PLASMA AIR