KAH Operation & Maintenance Guide
Page: 79 of 88
Krueger | 1401 N Plano Rd | Richardson, TX 75081 | 972.680.9136 | kruegerinfo@krueger-hvac.com | www.krueger-hvac.com
FIGURE 88 - UV CONTROL PANEL WIRING (GREATER THAN 8 AMPS) (CONTINUED)
SECTION 5 - WIRING DIAGRAMS (CONTINUED)
Sequence of Operation:
Disconnecting means of UV lighting will be accomplished by “CB1” internal to the panel. “CB1” is cable of being locked out by panel latching
mechanism.
“SW1” is a proximity switch with a magnet, which will close a set of normally open contracts. The magnet will engage the “SW1” contact whenever it
is within 1/2” of the switch.
“TDR1” is one second (1sec) time delay relay having normally open contacts. When power is initiated, its contacts will close for one second then re-
open. To reset, power, power must be removed from “TDR1”
“C1” is a dpdt 24 vac control relay, used to seal in its coil and provide interlocking means to the UV lights.
If all doors are closed, all the “SW1”s will allow “C1” to energize, as long as power is available.
By selecting “CS-1” to the “On” position, the 24vac control power circuit will be energized. As long as all doors with door switches (SW1) are closed
and upon detection of power to the 1 second time-delay relay (TDR-1), the “TDR-1” normally open contracts will close for one second, energizing the
contactor “C1” will remain energized. Should any one door having “SW1” mounted, were to open, “C1” will de-energize, deactivating the UV lamps.
Closing all doors will not turn on UV lights. “CS-1” will be required, to be cycled “Off” then back “On” to allow the lights to come back on. If the power
is removed from the UV control panel and re-energized (such as when power fluctuates off then back on), the UV lights will reactivate automatically.
The “IL” “UV Light In Use” indicator lamp will allow the user to know if the lights have been energized.
