Airedale SmartCool 11-233kW - Manual (Page 26)

Dual Power Supply
The SmartCool range shall be designed with dual power supply capability,
so that in the event of a power failure the supply can be switched from utility
to an alternative power supply (such as second utility or generator).
A dual power supply changeover switch shall be provided to enable
continuous power to the SmartCool in order to reduce unit downtime and
therefore loss of cooling to a minimum.
For the dual power supply feature to operate effectively the two incoming
power supplies must have the same voltage and frequency.
During changeover of power there is an interval of ≈180ms with no power.
For critical applications a power backup module can be added to maintain
power to the unit controls, allowing for immediate reinstatement of cooling
following changeover.
The option as standard offers switch position status and supply priority set,
both of which are configurable via the unit’s display.
Supply priority set is fully configurable via the unit’s display and is used to
set which of the two power supplies power will be drawn from when both
power supplies are active.
Switch position status indicates to the end user which position the switch is
currently in i.e. A or B and is shown via the unit’s display.
When the dual power supply is fitted the UltraCap UPS is fitted as standard.
Ultracap UPS
The Ultracap module is an external backup device for the controller. The
module guarantees temporary power to the controller in the event of power
failures and allows for enough time to keep the controller running with time to
change power supplies.
The module is made using Ultracap storage capacitors (EDLC = Electric
Double Layer Capacitor), which are recharged independently by the module.
These ensure reliability in terms of much longer component life than a module
made with lead batteries: the life of the Ultracap module is at least 10 years.
When the dual power supply is fitted the Ultracap UPS is fitted as standard.
Energy Manager
Analysis of system energy consumption can be monitored via a
dedicated LCD display. Unit parameters can be adjusted via the unit
microprocessor control to affect energy usage in line with the system
need.
SmartCool™ 6 - 200kW Precision Air Conditioning
26
Introduction
SmartCool 6 - 200kW Chilled Water Technical Manual 7674716 V1.1.0_04_2014