Control Options - Daikin Enfinity Installation And Maintenance Manual

7 . If the thermostat operates but stops after a brief period:
a. Is there proper airflow? Check for dirty filter,
incorrect fan rotation (3-phase fan motors only),
or incorrect ductwork.
b. Is there proper water flow rate within temperature
limits? Check water balancing; back-flush unit if
dirt-clogged.
8 . Check for vibrating refrigerant piping, fan wheels, etc.
9 . Do not lubricate the fan motor during the first year of
operation as it is pre-lubricated at the factory.
10 . Field supplied relays installed on the input terminals
W1, W2, Y1, Y2 or G may introduce electrical noise.
Never install relay coils in series with the inputs.
Figure 18: Control options
Control
The MicroTech III controller is a
standalone microprocessor-based
MicroTech III
control board conveniently located
in the unit control enclosure for easy
accessibility. The board is designed to
provide thermostat control of a Water
Source Heat Pump using a two-stage
wall thermostat. The unit controller
provides unit-wide control of the WSHP
and control of the first refrigerant circuit.
(Standalone) Unit
The I/O Expansion Module is an
Controller with I/O
extension of the Microtech III controller
Expansion Module
and provides control of the second
refrigerant circuit. External LED status
lights display fault conditions to provide
easy troubleshooting and diagnosis of
the second circuit.
The MicroTech III control system
L W
on orks
accepts a plug-in L
commu nication module to provide
network communications and added
functionality to easily integrate with
an existing BAS. The communication
module can be factory- or field-installed
Communication
and is tested with all logic required to
Module
monitor and control the unit.
The MicroTech III controller accepts a
BACnet
plug-in BACnet commu nication module
to provide network communications
and added functionality to easily
integrate with an existing BAS. The
communication module can be factory-
Communication
or field-installed and is tested with all
logic required to monitor and control
Module
the unit.
www.DaikinApplied.com
Description
Each unit controller is factory
programmed, wired, and tested for
complete control of single zone,
standalone operation of your Daikin
Water Source Heat Pump.
Allows for:
Control of second refrigeration circuit,
secondary heating options and
cooling/dehumidification options.
LonTalk application protocol is
W designed for units that are integrated
on orks
into a L
network for centralized scheduling
and management of multiple heat
pumps.
Designed to be linked with a
centralized building automation
system (BAS) through a BACnet
communications network for
centralized scheduling and
management of multiple heat pumps.

Control options

The control enclosure houses the major operating
electrical controls including the MicroTech III controller
and I/O expansion module, control transformer,
compressor relays and fan relay. Each component is
easily accessed for service or replacement.
Three unique control choices are offered with the
MicroTech III control system:
■ Standalone operation using a MicroTech III
controller and I/O expansion module
■ MicroTech III controller with I/O expansion module
and L W
on orks
■ MicroTech III controller with I/O expansion module
and BACnet® communication module
Each option features direct quick-connect wiring to all
unit-controlled components for "clean" wiring inside the
control box. Each control circuit board receives power
from a 75 VA transformer.
Application
W communication
on orks
26
® communication module
Protocol
Unit-mounted or wall-
mounted thermostat or room
sensor
L M 3.4 Certified
on ark
BACnet
MS/TP
LARGE VERTICAL WSHP IM 1059-12
s -u
tart P