5
10. Use field-supplied no. 10 self-drilling screws to attach
accessory to unit.
NOTE: Holes can be drilled in unit if self-drilling
screws are not used. Drill 8 holes for eight no. 10
screws used to attach accessory to unit. Using eight no.
10 screws, attach accessory to unit.
Be sure accessory has a watertight seal against unit
wall. Use standard 1/2-in. strain relief connectors
when running wiring through any hole in unit.
Repeat for all accessory germicidal lamps.
11. Wire accessory germicidal lamp to disconnect switch.
See Table 1 for wiring recommendations. Use UVC
resistant wire, outdoor duty, 14-gage ROMEX cable or
1/2-in. conduit for all wiring. Wire power, neutral, and
ground leads to disconnect switch. Do not ground to
unit. See Fig. 9.
Route wiring away from indoor fan motor and coil sur-
faces. Strain relief bushings are required when routing
wire through panels. A 7/8-in. diameter hole is
required in top coil support bracket to route wiring to
disconnect switch. The 7/8-in. diameter hole may be
factory-drilled depending on when the unit was pro-
duced. Field-drilling of hole may be required.
When using ROMEX cable, accessories can be wired
in series. When using conduit, accessories cannot be
wired in series due to size of conduit, and an additional
7/8-in. diameter hole is required in top coil support
bracket for routing of conduit from both accessories.
See Fig. 6.
When connecting to terminals in accessory germicidal
lamp, strip end of wire 3/8-in. and push wire into ter-
minal. Ultra-violet lamps should be operated continu-
ously from power source. Lamps should not be
connected to indoor fan power source or any power
source where they would be cycled more than twice
per day.
NOTE: If door interlock switch is used, black power
lead will be connected to the door interlock switch wir-
ing (not to the disconnect switch).
12. Locate the germicidal bulb. DO NOT TOUCH
GLASS ON BULB. Grasp the bulb only by the base
(non-glass part). Clean the bulb using a lint free wipe
and isopropyl alcohol. Make sure O-ring on bulb is
toward the accessory and push into the 1-in. hole until
seated. Hold the bulb in place and lock into place by
installing the spring wire fastener to the lances on the
bulb.
13. Push on the power plug. Do not force. Rotate
90 degrees if necessary.
14. Affix the ultra-violet light warning label to the outside
of the unit, in plain sight, on all access doors. Replace
label when worn. See Fig. 10.
15. Test all circuits and return power to unit. Accessory
bulb should glow with a blue hue. If bulb cannot be
seen briefly back out bulb and view from safe distance.
Replace bulb when done. If bulb does not glow, check
wiring, safety interlock, or replace bulb.
Installation (48/50EJ,EK,EW,EY Units) —
Perform the
following procedure to install the germicidal lamp:
1. Turn off all power to unit.
2. Install reflective material (field-supplied) in installa-
tion location if desired. Reflecting ultra-violet light
energy is recommended to enhance performance and
reduce shadows. Lining the installation area with alu-
minum or aluminum foil allows light energy to reflect
instead of being absorbed, increasing the effectiveness
of the germicidal lamp.
Be careful not to drill into coil, refrigerant lines, or other
objects inside the HVAC unit. Damage to unit can result.
Fig. 6 — Disconnect Switch and Interlock Switch Installation —
48/50HJ,TJ015-028 Units and 50HJQ014 and 016 Units
NOTE: Dimensions are in inches.
