IM 830-6
44 www.DaikinApplied.com
Making Control Connections
MicroTech
®
Unit Mounted Direct
Digital Control (DDC) Components –
Models AHF, AHV, and AHR
1.
MicroTech Unit Ventilator Controller (UVC):
(Located Beneath the Local User Interface Panel).
Factory mounted and run tested, microprocessor-
based DDC control device capable of complete
Standalone unit control, Client/Server control or
incorporated into a building-wide network using an
optional plug-in communication module. The UVC
contains a microprocessor that is preprogrammed with
the application code required to operate the unit. The
UVC supports up to 16 analog inputs, 8 binary inputs, 4
analog outputs, 2 PWM outputs, and 14 binary outputs.
The UVC EXP I/O board supports up to 4 additional
analog inputs and 8 additional binary outputs. Client/
Server units have the controller factory configured
and installed for a local peer-to-peer network between
these units (network wiring between these units needs
to be field installed). Optional network communication
is provided via plug-in communication modules that
connect directly to the UVC.
2.
Communication Module (optional):
Plug-in network
communication module that is attached to the UVC
via a 12-pin header and 4 locking standoffs. Available
communication modules:
•
Building Automation and Control Network
(BACnet®) Client Server/Token Passing
(MS/TP)
– Allows the UVC to inter-operate
with systems that use the BACnet (MS/TP)
protocol with a conformance level of 3. Meets
the requirements of ANSI/ASHRAE 135-2008
standard for BACnet systems
•
l
on
W
orks
® compliant Space Comfort
Controller (SCC)
– Supports the
L
on
W
orks
SCC
profile number 8500_10
3
Local User Interface (LUI) (optional):
) The LUI provides a unit mounted
interface which indicates the current unit operating state
and can be used to adjust the unit ventilator operating
parameters (operating mode, temperature set points,
fan speed and occupancy mode). The LUI features a 4
x 20 OLED digit display, 4 keys, and 2 individual LED
indicators. In addition to the operating mode states
and fan functions, the touch pad will digitally display:
•
The room set point temperature
•
The current room temperature
•
Any fault code for quick diagnostics at the unit
4. External Signal Connection Plugs:
Three (3) multi-pin
plugs are factory provided and pre-wired with short wire
whips that are capped (they must remain capped if not
used).
Provided for field wiring of :
•
Remote Wall Mounted Temperature Sensor (optional
accessory).
•
External Input Signals (by others): unoccupied, remote
shutdown, ventilation lockout, dew point/humidity (night
time operation), or exhaust interlock signals
•
External Output Options (by others): lights on/off, fault
indication signal, exhaust fan on/off or auxiliary heat signal.
5. Electric Connection Box:
Contains the motor speed
transformer. Refer to the unit wiring diagram for specifics.
6. Unit Main Power “On-Off” Switch (SW1):
Disconnects
the main power to the unit for servicing or when the unit is
to be shut down for an extended period of time.
7. Fuse(s):
Fan motor and controls have the hot line(s)
protected by factory installed cartridge type fuse(s).
8. Control Transformer:
75 VA 24-volt NEC Class 2
transformer for 24 volt power supply.
Not all external signal options can be used simultaneously and may
not be available on all software models
NOTICE
Figure 80: MicroTech Sensor and Component Locations