GAYLORD ELXC Series, Operation, Maintenance & Installation Manual

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5-21
Chapter 5 - Testing and Repair
UV Ballast Box - Cont.
High Temperature Shutdown Controller
A High Temperature Shutdown Controller is mounted in the Ballast Box to monitor the internal temperature
of the box and to shut down the UV System if the temperature in the Ballast Box exceeds 118°F. (Refer to
Figure 5-20-2). Temperatures above 118°F may cause the Ballast Box components to fail. Activation of the
High Temperature Shutdown Controller will shut off the UV system, turn on the Blue UVi System Standby
status light mounted on the Ventilator, and the Gaylord Command Center will display text indicating a similar
message as the status light. The exhaust fan will remain on. The High Temperature Shutdown Controller will
typically activate for the following reasons:
1. The Ventilation Fan has failed. To replace the Ventilator Fan follow the instructions on page 5-16.
2. The Mesh Filter on the fan inlet is clogged or the inlet is blocked by building insulation or other material.
Corrective action: Clean or replace the Mesh Filter and/or remove any building insulation from the inlet.
3. The louvers at the opposite end of the Ventilation Fan are blocked by building insulation or other material.
Corrective action: Remove any building insulation from the inlet of the louvers.
4. Building insulation has been placed over the top of the Ballast Box. Corrective action: Cut a rectangular
opening in the insulation, the size of the Ballast box, and slide it down around the sides of the box. Tape
the insulation down so it will not interfere with the openings.
5. The cooking equipment under the Ventilator is in a “runaway” condition and operating too hot. Correc-
tive action: Check with owner/equipment operator to see if cooking equipment is operating properly. If
not, it must be serviced.
Important Note: The above conditions must be corrected or a UV Ballast failure will follow.
Checking the High Temperature Shutdown Controller Program
The High Temperature Shutdown comes programmed from the Gaylord factory and should never need to be
reprogrammed. To check the program, use the following instructions:
1. Push the “ START FAN ” button on the Command Center. Check to insure that the Green UVi System On
status light is on.
2. Confirm controller is showing current ambient temperature (Refer to Figure 5-20-1).
3. Briefly push Set, “SP” will appear.
4. Press Set a second time, then release. “118” will appear. If it does not, the control is either faulty or needs
to be reprogrammed. Consult a Gaylord Service Agency or call Gaylord Industries for instructions.