WARNING:
Never expose eyes or skin to UVC light from any source. Looking directly at the UVC light may cause permanent eye damage
or blindness.Never operate the UV-Aire
™
Air Purifying System out of the plenum. Avoid touching the glass portion of the lamp with your hands.
Page 4 of 12
DUO MODEL INSTALLATION INSTRUCTIONS:
1. Choose a location for the Duo unit, with the following considerations:
a. The Duo unit will reduce organic buildup on an HVAC cooling/heating coil by illumination with UVC
germicidal rays. Locate the Duo such that the maximum surface area of the coil is illuminated, while
installing as close to the coil as possible without damage to the coil.
CAUTION: Use care to avoid damage to the coil and any wiring or other components while installing the
Duo unit.
WARNING:
WARNING:
To prevent water damage or electric shock, do NOT mount unit under a humidifi er.
To prevent water damage or electric shock, do NOT mount unit under a humidifi er.
b. Duo 24V models must be installed with the attached power cord within reach of the included 24V
transformer, or the 24V power cable must be extended by using minimal 18 gauge wiring suitable for the
installation, with maximum extension length of 20 feet. DO NOT connect to the HVAC system transformer,
as this may overload the HVAC transformer and/or under-power the Duo 24V unit, which may cause damage
and will void the factory warranty. The transformer included with DUO 11/24V and DUO-14/24V
models is intended to be mounted on a 4x4 junction/conduit box or within an approved electrical
enclosure. The mounted 24V transformer shall be connected to 115 or 230 VAC power.
The transformer included with the DUO-16/24V models is intended to be plugged directly into the
wall. The plug-in transformer shall be connected to 120V.
c. Duo 120V models must be installed with the attached power cord within reach of a permanently-installed
standard 120V electrical outlet with 15 amp circuit protection. Do not connect to extension cords, or
extend or remove the plug from the power cord. Make sure the Duo power cord is protected from
damage, and inspect the cord for damage or defect. Do not use the Duo 120V unit if the power cord is
damaged or defective.
d. The Duo unit may be installed on either the supply or return plenum.
e. The Duo unit may be installed in upfl ow, downfl ow, or horizontal fl ow ducts and plenums.
f. The Duo unit may be installed directly onto a sheet metal air duct or plenum, or onto fi berglass ductboard
when installed using the included Ductboard Adapter Plate (see Figure 1).
2. Install the Duo unit:
a. Hold or temporarily tape the included Ductboard Adapter Plate in the location chosen for installation,
and using the plate as a template,mark the mounting surface using the outermost slots in the plate (see
Figure1).
Alternatively, a 5-3/8” square may be marked on the mounting surface.
b. Cut out the opening for the Duo unit in the mounting surface, making sure to
cut slightly outside the marked lines if the Ductboard Adapter Plate was used
as a template.
c. If mounting the Duo unit on ductboard: attach the Ductboard Adapter Plate
to the opening by folding the inner fl aps of the plate into the opening and
fully back against the inside of the opening in the ductboard, either from the
sides or from top and bottom of the plate. Finish the Plate Adapter
installation by sealing around the edges of the plate to the ductboard, using
mastic foil tape or other material suitable for sealing duct joints.
Figure 1
P/N 46648100 09/18 Rev J
7. Install the PCUV-16UA as directed for the Duo models. Use the included sheet metal screws or other
appropriate fasteners to securely mount the PCUV-16UA to the mounting surface or Duct Board Adapter if
used.
8. Complete the installation of a new UV-16/24 or UV-16/120 model as directed in the instructions includ-
ed with the UV-16 unit, otherwise install the existing UV-16 lamp and ballast by instructions included with
the unit.
