In applications requiring redundant systems to share the cooling requirements, Thermal Edge has a system that will toggle back and forth between the two units thereby giving them each equal operating time.
Additionally, this system provides for the situation where one unit becomes disabled. In this event, the second unit continues to provide the appropriate amount of cooling to your electrical enclosure while the disabled unit would be in alarm mode.
This system is intended for 100% redundancy where failure is not an option.
This is our alternating, or toggle system.
ALTERNATING CONTROL
This control method is intended to provide cooling to a common enclosure by two (or more) air conditioners which alternate operation rather than share load. This provides 100% redundancy while balancing the run time on each unit.
Two self contained air conditioners with independent dual stage thermostats will be connected with a toggle control so that the units will alternately share the cooling load. In the event of the failure of one unit, the toggle system will be deactivated and cooling load will be switched to the remaining operational unit. A failure signal will be available to alert the customer that one unit has failed.
HIGH LIMIT
Each Thermostat has a high set point which is used as a failure alarm. On either high limit, that unit is switched out of the toggle control and cooling will be solely by the alternate air conditioner until the limit is manually reset.
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