OM 1239
3
www.DaikinApplied.com
Introduction
This installation and operation manual covers the
MicroTech
®
III unit controller for Daikin large horizontal
(CCH-CCW) and large vertical (LVC-LVW) Water
Source Heat Pumps. For information on
L
on
W
orks
®
or BACnet
®
communication modules and other ancillary
components, see:
■
IM 927 - MicroTech III Water Source Heat Pump
L
on
W
orks
Communication Module.
■
IM 928 - MicroTech III Water Source Heat Pump Unit
Controller BACnet MS/TP Communication Module.
■
IM 933 -
L
on
W
orks
Plug-In Software for use
with MicroTech III Unit Controller -
L
on
W
orks
Communication Module.
■
IM 955 - MicroTech III Water Source Heat Pump
Wall-Mounted Room Temperature Sensors.
■
IM 956 - Temperature Sensors for Units with
MicroTech III Unit Controller and
L
on
W
orks
Communication Module.
Three unique control choices are offered with the
MicroTech III control system (See Table 1 on page
4
).
1 .
Standalone operation using a MicroTech III
controller and I/O expansion module
2 .
MicroTech III controller and I/O expansion module
with a
L
on
W
orks
®
communication module
3 .
MicroTech III controller and I/O expansion module
with a 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 75VA transformer.
There are several basic requirements and features for
both the MicroTech III Unit controller (main board) and
the I/O Expansion Module.
MicroTech III unit controller support
features
•
Single Speed Fan On/Off Control
•
Pump Request On/Off Control
•
Compressor #1 Heating & Cooling On/Off Control
•
Reversing Valve #1 On/Off Control
•
Compatible with Thermostat or Thermistor Type
Room Sensors
•
Short or Long Range Setpoint Adjustment for Room
Sensor Controls
•
Occupancy Selection and Emergency Shutdown
Inputs
•
Tenant Override Button Input
•
Three Stage Thermostat Heating (W1, W2, W3)
•
Two Stage Thermostat Cooling (Y1, Y2)
I/O expansion module support features
•
Compressor #2 Heating & Cooling On/Off Control
•
Reversing Valve #2 On/Off Control
•
Choice of one of the following “Secondary Heating”
1. Supplemental Electric Heating
2. Boilerless Electric Heating
•
Choice of one of the following “Cooling/
Dehumidification”
1. Active Hot Gas/Reheat (HGR) Dehumidification
2. Hydronic Cooling (Waterside Economizer)
•
Humidistat Input
1. Units with HGRH: Humidistat Calls for
Dehumidification
2. Units without HGRH: Humidistat Calls for
Cooling Stage #1
I
ntroduCtIon
