Making Control Connections; Microtech Ii Unit-Mounted Ddc Control Components - Daikin ARQ Installation Manual

Making Control Connections

MicroTech II™ Unit Mounted DDC Control
Components – Models ARQ, ERQ, and GRQ
1. MicroTech II 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, Master/Servant 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 6 analog inputs,
12 binary inputs, and 9 binary outputs. The UVC EXP I/O
board supports up to 4 additional analog inputs and 8 additional
binary outputs. Master/Servant 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®) Master
Servant/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 135-1995 standard for BACnet systems. (See IM 731
for specific installation instructions of BACnet module).
• L W ® compliant Space Comfort Controller (SCC) –
on orks
Supports the L W
on orks
729 for specific installation instructions of L
• Metasys N2® Open – Provides N2 Open network communication
capability to the UVC. (See IM 730 for specific installation
instructions of Metasys N2 module).
3. Local User Interface (LUI): 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 2-digit display, 7 keys (1 key is hidden), and 9
individual LED indicators. See "Local User Interface" for further
details.
Figure 42: MicroTech II Sensor and Component Locations (Top View) for AR, ER & GR
Page 24 of 42
SCC profile number 8500_10. (See IM
W
on orks
Self-Contained WSHP Unit Ventilator Models ARQ, ERQ, GRQ
4. Tenant Override Switch: Provides a momentary contact closure
that causes the unit to enter the "tenant override" operating mode
for a set time period (default = 120 minutes).
5. Time Clock (TC) (optional on standalone units only): Factory
mounted 7-day/24 hour, digital time clock with up to twenty (20)
programs to sequence the unit ventilator through occupied and
unoccupied modes in accordance with a user programmed time
schedule.
6. External Signal Connection Plugs: (Located beneath
the Local User Interface Panel), 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.
7. Motor Speed Transformer: (Located beneath the Local User
Interface Panel). Multi-tap auto-transformer provides multiple
fan motor speed control through the LUI.
8. 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.
Figure 43: Unit Main Power "On-Off" Switch (SW1)
module).
IM 1083