Asahi/America 94 Series, Installation, Operation And Maintenance Manual

Page: 12 / 34

ASAHI/AMERICA, INC 655 ANDOVER STREET LAWRENCE, MA. 01843 TELEPHONE 800-343-3618
File: assembly/manuals/Series 94 Gen II A/C Modulating Svc Manual Rev. A 11/19/19
Page 12 of 27
Please read the following pages to ensure that ALL of the
selectable features are understood and selected if required.
Power / Signal (J2)
Power is connected to pins 1, 2, & 3 as shown in the wiring schematic. The fuse
installed on the unit is rated for maximum output current that can be safely
delivered by the AC outputs. Replacement fuses must not exceed the maximum
rating to prevent damage to the unit. Smaller fuse sizes can be used with smaller
motors – consult the factory for appropriate fuse size and type.
An appropriate command signal, either 0-5V, 0-10V, 1-5V, 2-10V or 4-20mA,
should be connected to pin 5 or 6 (as shown in the Block Diagram) while using
pin 4 as the return
signal ground . The DHC-100 must be configured for the type
of command signal that is to be used (see COMMAND TYPE).
Pin 7 of J2 provides an aux5V output which can be used to connect a
command potentiometer. By connecting one end of a potentiometer to pin 7, the
other end to pin 4, and the wiper to pin 6, a local control knob can be
implemented. Pin 8 provides an aux15VDC output which can be used to
power an input or outpur 4-20mA transmitter.
Actuator (J1)
The actuator motor and feedback potentiometer are connected to J1 as shown in
the wiring schematic. The motor neutral wire must be connected to pin 2, while
one motor winding is connected to pin 1 and the other winding is connected to
pin 3. The feedback potentiometer wiper must be connected to pin 5, while one
end is connected to pin 4 and the other end is connected to pin 6. The
Polarity
Detection feature of the DHC-100 automatically determines which motor winding
to control based on where the open and closed positions are set; this feature
also eliminates the need to rewire the unit for direct or reverse acting
applications.
When the

and

buttons are used to control the actuator, the

button will
turn on the motor winding connected to pin 1, while the

button will turn on the
motor winding connected to pin 3. See MANUAL/FB POT CAL for more details.
Override (J7)
J7 provides a simple 2-wire connection that can override the DHC-100 to perform
a variety of external control functions. Using an appropriate interface module,
commonly used auto/manual station switches are easily implemented with low
voltage/low current switches. The factory-installed jumper between pins 1 and 2