gForce Ultra IOM
42
dap4 Controller
This unit 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
•
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.
•
Open electrical enclosure.
•
CAUTION:
Verify all power is OFF using a voltmeter.
Condensate Pumps (Optional)
If a gravity drain is not available, a condensate pump is an optional item. Condensate pumps may be
unit mounted or ship loose for field assembly and wiring. Factory mounted pumps are pre-wired. While
no outside power source is required, field piping is still a requirement. If the condensate pumps are
shipped loose, a separate source of power is normally required. Condensate pumps are available in
various voltages, therefore, always check the pump power requirements before connecting power.
WARNING:
For shipped loose and field installed condensate pumps, a
separate power source must be supplied to avoid any flooding problems.
Wire the pump to shut the system off in case of overflow or pump failure.
WARNING:
The condensate drain MUST be connected to an external
drain line (provided by others) before unit start up. Without field piping
condensate water will damage internal components.
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