Chapter 6 – Testing and Repair, Page 6-36___________________________________________________
High Temperature Shutdown Controller
Overview
A High Temperature Shutdown Controller is mounted in the Main Electrical Raceway to monitor the
internal temperature of the raceway and to shut down the UV system
if the temperature exceeds 118° F.
(Refer to Figure 6-36-1). Temperatures above 122°
may cause the components located in the Main
Electrical Raceway 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. The exhaust fan
will remain on.
Typical Activation
The High Temperature Shutdown Controller will typically activate for the following reasons:
1.
The Main Electrical Raceway Ventilation Fan has failed. To replace the Ventilation Fan follow
the instructions on Page 6-30.
2.
The Main Electrical Raceway Ventilation Fan inlet or outlet Ventilation Snorkel is blocked by
building insulation or other material (Refer to Figure 6-30-1). Corrective action: Remove any
blockage from the inlet.
3.
The cooking equipment under the Ventilator is in a "runaway" condition and operating too hot.
Corrective action: Check with owner/equipment operator to see if cooking equipment is
operating properly. If not it must be serviced.
4.
Air Flow through the Ventilator is too low. Verify air volume by following the instructions
beginning on Page 6-1. Correct if less than C-6-4-1 or C-6-4-2.
Important Note:
The above conditions must be corrected or a UV Ballast failure will follow.
Figure 6-36-1
High Temperature Shutdown Controller
High Temperature
Shutdown Controller
