Table of Contents
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Chapter 1: Introduction
1.6.5 Firestat
Optionally mounted in the return air side of the cabinet, a fire detector senses high return air temperature and signals the
controller when a fire alarm condition exists and shuts down the air conditioner.
1.6.6 Dual Power Auto Transfer Switching
An automatic transfer, main power switching system is available for critical operations. With this option, two main power service
disconnect switches are provided on the electric box to connect two independent power sources. If the primary power source
(Power Supply A) is interrupted or, if an under-voltage, phase loss, or imbalance occurs, the automatic transfer switching circuitry
immediately transfers operation of the precision A/C system to a secondary power source (Power Supply B). If power is
transferred, the system controller provides an alarm message and the alarm display indicates which power source failed. When the
primary power source is functionally restored, the operation of the A/C system is automatically transferred back to the primary
power source.
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Table of Contents
Troubleshooting
