Daikin IM 986-2 VHC User Manual

IM 986-2 / Page 31 of 48
MicroTech III Controller With
LonWorks® Communication Module
For installation and operation information on
L
onWorks Communication Module and other ancillary
control components, see:
• IM 927 - MicroTech III Unit Controller for Water
Source Heat Pumps (LonWorks).
• IM 933 - LonMaker Integration Plug-in Tool: For
use with the MicroTech III Unit Controller.
• IM 955 - MicroTech III Wall Sensor For use with
MicroTech III Unit Controller with LonWorks
Figure 46: LonWorks Communication Module
The LonWorks communication module will plug into
the MicroTech III unit controller at the CN_LON1
Header (see gure 48, page 34).
Each McQuay water source heat pump can be equipped
with a L
onWorks communication module. The
controller is microprocessor-based and is designed
to communicate over a L
onWorks communications
network. The unit controller is factory programmed
and tested with all the logic required to monitor and
control the unit. The wall thermostat sets the unit mode
of operation. The unit controller monitors water and air
temperatures, and can communicate fault conditions to a
L
onWork communications network.
The MicroTech III unit controller include unit-mounted
return air, discharge air and leaving water temperature
sensors. Options include setpoint adjustment and tenant
override and the capability of substituting the return air
sensor with a wall-mounted temperature sensor.
Each unit controller orchestrates the following unit
operations:
 Enable heating and cooling to maintain setpoint
based on a room sensor.
 Enable fan and compressor operation.
 Monitor all equipment protection controls.
 Monitor discharge air temperature.
 Monitor leaving water temperature.
 Relay status of all vital unit functions.
 Support optional control outputs.
A set of three status LED's aid in diagnostics by
indicating the water source heat pump operating mode
and alarm conditions. If there are no current alarm
conditions, the Green LED will indicate the normal unit
operating mode as shown in the table below. If there are
one or more alarm conditions present, various LED's
will ash to indicate an alarm condition.
MicroTech III heat pumps with a MicroTech III unit
controller are LonMark certied and designed to be
linked with a centralized building automation system
through a L
onWorks communications network for
centralized scheduling and management of multiple
heat pumps. Wall-mounted room sensors are available
to control the heating and cooling operation of each
MicroTech III Water Source Heat Pump Unit Controller.
Available room sensors include: room sensor with
LED status and tenant override button, room sensor
with LED status, timed-override button, room sensor
with LED status, timed-override button, and setpoint
adjustment, and room sensor with LED status, timed-
override button, setpoint adjustment.
The MicroTech III water source heat pump unit
controller provides control of McQuay water source
heat pumps. The controller enables the mode of
operation, monitors the water and air temperatures, and
indicates fault conditions. Each unit controller is factory
programmed, wired, and tested for effective operation
of your McQuay water source heat pump.
The MicroTech III water source heat pump controller
uses L
onWorks technology. One of the following two
versions of the application software is loaded into the
controller at the factory.
LonMark® 3.4 certied application code is the current
standard application code for MicroTech III units.
Use LonMark application code in new applications
including:
 Units that operate stand alone.

Daikin IM 986-2 VHC Specifications

General

Brand	Daikin
Model	IM 986-2 VHC
Category	Heat Pump
Language	English