dap4 Controller
The Data Aire Computer Room Air Conditioner (CRAC) or Computer Room Air Handler
(CRAH) is furnished with a microprocessor-based dap4 controller. The controller includes unit
control functions and display normal functions and service diagnostics with six keys (buttons)
for easy programming. The controller allows recall and display of the high and low
temperature, high and low humidity, current percent of capacity and average percent of
capacity for chilled water valve, compressor, reheat, humidification, dehumidification,
component runtimes for fan motor(s), reheat, humidification, and dehumidification (if
applicable).
See the separate dap4 User Manual for detailed parameter settings and operating instructions.
Disconnect Switch (Optional)
A thru-door locking disconnect switch is an optional feature which includes a non-automatic
disconnect switch mounted in the high voltage section of the electrical control box. The
operating mechanism prevents access to the high voltage electrical components until switched
to the "OFF" position. The operating mechanism protrudes through the exterior door and is
lockable in the OFF position.
NOTE: The optional disconnect switch extension shaft and locking handle are
shipped loose to prevent damage during transit and installation. It is the
installing contactors responsibility to install these components as part of the
installation process.
How to Open the Electrical Enclosure Panel
• Disconnect all remote electric facility power before servicing unit.
• Turn OFF the disconnect switches, if equipped.
• Open the cabinet outer door in front of the electrical enclosure.
• Pushing down on both spring latches on electrical enclosure panel.
• Open electrical control panel.
• CAUTION: Verify all power is OFF using a voltmeter.
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