94 McQuay IM 987
Unit Options
Ultraviolet Lights Option
When this option is employed, ultraviolet C light bathes the
moist surfaces on the coil and drain pan, killing most micro-
organisms that can grow there.
Typically, ultraviolet lights are installed on the leaving side of
the cooling coils in the unit. Each light module is mounted on a
rail and is removable for convenient bulb replacement.
UV Light Power Disconnect switches (two per door) are
factory installed on every door that allows a direct line of sight
to the UV lamps when opened. These switches are designed to
prevent UV exposure when cabinet doors are opened and must
not be disabled.
A viewing window near the UV lights allows viewing to
determine if the lights are energized. The viewing windows
use specially designed glass that blocks harmful UV light.
Figure 109: Typical Ultraviolet Light Installation
WARNING
UVC exposure is harmful to the skin and eyes. Looking at an
illuminated bulb can cause permanent blindness. Skin
exposure to UVC can cause cancer.
Always disconnect power to unit before servicing. Do not
operate if disconnect switch has been disabled.
Light
Units
Light Power
Disconnect
Switch
Light Power
Disconnect
Switch
View
Window
Cooling
Coil
AIRFLOW
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