26
6.0 CONTROLS
6.1 dap4 Microprocessor Control Panel
The standard controller on all gForce GT equipment is the dap4 microprocessor control panel. This
state-of-the-art control panel has a separate manual that goes into extensive detail regarding func-
tions, features, programming and troubleshooting.
The dap4 microprocessor control panel has an entire manual dedicated to its use and op-
eration. This manual must be referenced to complete a thorough unit installation. Start-up
is not complete until the dap4 control panel settings are established.
6.2 Secondary Heat Exchangers
Most of the controls on remote condensers, condensing units and uid coolers consist of basic
electromechanical type components. Secondary heat exchangers have a separate Operation and
Maintenance manual which give complete details on adjusting thermostat settings, etc. Also refer
to Section 3.5 of this manual.
6.3 Wiring Diagrams
Every gForce GT unit comes with a wiring diagram. These diagrams are ladder type schematics
intended for service personnel. The intent is to allow the technician to understand the wiring details
associated with the electrical components and how they interface with the dap4 control panel as
well as peripheral equipment.
Data Aire’s chilled water unit wiring diagrams will have a drawing number which starts out with the
three letter designation, GFX. An example of a typical diagram, GFX-S-903.
7.0 ELECTRONICALLY COMMUTATED MOTORS (EC MOTORS)
Electronically Commutated (EC) motors with “Plug fan” are standard on all gForce units.
NOTE: The plug fan modules are powered by high voltage input line power (i.e.
208-230V/3PH/60HZ or 460V/3PH/60HZ) and speed is set from 10V DC control signal
from the unit’s microprocessor controller - Data Alarm Processor 4 (dap4).
Fan speed is factory set based on order.
Fan speed can be changed in 1% increments through the unit’s microprocessor control (dap4). See
the dap4 operation manual (Menu J Factory Settings) for details and recommended settings.
7.1 START-UP WITH EC MOTORS/PLUG FANS
Using the dap4 manual switch operation will not bring the fans to full speed. Enabling the BLOWER
manual mode switch on manual override module engages the contactors powering the high voltage
to the plug fans but sets the control signal to 0V.
Enabling any other manual mode switch will likewise disable all control outputs from the dap4 panel
resulting in full manual mode operation and setting the plug fans to 0V.
To Next Page
Loading...
Need help?
General
