OM 931-6 • MicroTech III Unit Controller for WSHP
19
www.DaikinApplied.com
MicroTech III Unit Controller
with
l
on
W
orks
®
Communication
Module
For installation and operation information on
L
on
W
orks
Communication Module and other ancillary control
components, see:
■ IM 927 - MicroTech III Water Source Heat Pump
L
on
W
orks
Communication Module.
■ 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
Each Daikin water source heat pump can be equipped
with a
L
on
W
orks
communication module that is
L
on
M
ark
3.4 certified to meet the
L
on
M
ark
Space
Comfort Control (SCC) profile for heat pumps. The
controller is microprocessor-based and is designed
to communicate over a
L
on
W
orks
communications
network. It can be factory or field-installed.
The unit controller is programmed and tested with all the
logic required to monitor and control the unit. An optional
wall sensor may be used with the communication module
to provide limited local control of the Water Source
Heat Pump. The unit controller monitors water and air
temperatures and passes information to the communication
module. The module communicates with the BAS, to
provide network control of the Water Source Heat Pump.
Figure 9:
L
on
W
orks
Communication Module
The MicroTech III unit controller with communication
module includes a unit-mounted return air, discharge air
and leaving water temperature sensor. Wall mounted
temperature sensors include setpoint adjustment and
tenant override. The user has the capability of substituting
the wall sensor with a duct-mounted return air sensor.
MicroTech III Unit Controller with
L
on
W
orks
Communication Module orchestrates the following unit
operations:
■ Enable heating and cooling to maintain setpoint
based on a room sensor
■ Enable fan and compressor operation
■ Monitors all equipment protection controls
■ Monitors room and discharge air temperatures
■ Monitors leaving water temperature
■ Relays status of all vital unit functions
The MicroTech III unit controller with
communication module includes:
■ Return Air Temperature sensor (RAT)(field-installed)
■ Discharge Air Temperature sensor (DAT)(field-
installed)
■ Leaving Water Temperature sensor (LWT) (factory
installed option)
Note: Refer to IM 956-X for details to install (RAT) &
(DAT) sensors.
When an optional wall-mounted room temperature sensor is
connected to the unit controller, the Return Air Temperature
(RAT) sensor must not be installed. A wall-mounted room
temperature sensor and the return air temperature sensor
must not be connected simultaneously or the unit will not
operate properly.
CAUTION
The communication module provides access to setpoints
for operational control
Available wall sensors include:
■ Room sensor with LED status and tenant override
button
■ Room sensor with LED status, tenant override
button, and ±3°F setpoint adjustment
■ Room sensor with LED status, tenant override
button, 55° to 95°F setpoint adjustment
a
ppendIx
b
