Page 35
3- Open the blower access door.
4- Remove the screw in wire tie from the UVC assembly
and disconnect the 4-pin connector from the lamp end.
5- Remove and retain the (3) screws securing the UVC
assembly. Carefully slide the complete UVC
assembly out through the blower access door. See
figure 36.
FIGURE 37
LAMP
FLANGE
4-PIN
CONNECTOR
HOLDER
CLIPS (2)
SHEET METAL
END STOP
DETAIL A
BANDS (see
Note below)
UVC
Sub-Assembly
LAMP
NOTE - The bands around the lamp should be evenly spaced
as shown in the diagram.
INSTALL LAMP IN HOLDER CLIPS
6- Allow 10 minutes before touching the lamps. Then,
carefully remove the old lamp from the lamp holder
clips.
7- Wear cotton gloves or use a cotton cloth when
handling the new lamp. Place the new lamp in the
holder clips of the UVC assembly. Verify that the lamp
flange at the connector end is sandwiched between
the lamp holder clip and the sheet-metal end stop
(see figure 37).
8- Carefully place the UVC assembly on the blower
deck. Line up the mounting holes on the UVC
assembly with the mounting holes on the blower deck
See figure 36. Use the retained screws provided to
attach the UVC assembly in place.
9- Close the blower access door.
10- Reconnect power to the rooftop unit.
11- Open the filter access door and look through the view
port in the triangular sheet-metal panel to verify that
the UVC light is on.
If UVC lamp does not come on:
1- Check Power Wiring: Disconnect 1/4” QC (quick
connects) of the UVC cable near the UVC assembly.
With Power ON, use multimeter to test 110-230V at
the 1/4”QC quick connects from the control panel.
2- Check Lamp: Carefully remove the UVC assembly
out of the rooftop unit. Use multimeter to test for
continuity across each pair of pins at each end of the
lamp.
3- Check Lamp Installation: Make sure that lamp's pins
snap properly into the lamp holder.
LED(s) not illuminated
Power status LED not lit—Check that the lamp unit is
connected to the proper power source and is wired
correctly.
Lamp status LED(s) not lit—
1- Check that lamp 4-pin connectors are properly
engaged.
2- Ohm-check across the lamp pins to check for
continuity of lamp filaments (see figure 39).
Troubleshooting charts are provided to aid in determining the
cause of any problems encountered (figures 38 and 39).
Lamp Disposal
Hg-LAMP Contains Mercury.—Manage in accordance
with local, state and federal disposal laws. Refer to
www.lamprecycle.org or call 800-953-6669.
Proper Clean-up Technique in Case of Lamp
Breakage
Wear protective gloves, eye wear and mask.
Sweep the broken glass and debris into a plastic bag, seal
the bag, and dispose of properly. Contact your local waste
management office for proper disposal.
Do not use a vacuum cleaner. Do not incinerate.
Maintenance
For all maintenance, contact a qualified HVAC
technician.
Read the maintenance instructions before opening
unit panels.
Unintended use of the unit or damage to the unit
housing may result in the escape of dangerous UVC
radiation. UVC radiation may, even in small doses,
cause harm to the eyes and skin.
Do not operate units that are obviously damaged.
Do not discard the triangular UVC light shield or any
barriers with an ultraviolet radiation symbol.
Do not override the door interlock switch that
interrupts power to the UVC light.
Do not operate the UVC light outside of the unit.
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