McQuay MHC Standard Range User Manual

Page 16 of 36 / IM 985-1
MicroTech III Unit Controller with LonWorks
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
An amber, on-board status LED indicates the status of
the MicroTech III L
onWorks module.
The MicroTech III unit controller includes:
 A
unit-mounted return air sensor
 A
unit-mounted discharge air sensor
 A
leaving water temperature sensor
The communication module provides access to setpoints
for operational control
Available wall sensors include:
 Room
sensor

Room sensor with LED status and tenant override
button

Temperature sensor with LED status, timed-over-
ride
button, and ±3°F setpoint adjustment
Room sensor with LED status, timed-override
button, 55° to 90°F setpoint adjustment
MicroTech III Unit Controller with LonWorks®
Communication Module
This manual covers the installation of a McQuay
Console Water Source Heat Pump. 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 (L
onWorks).
• 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
• OM 931 - MicroTech III Unit Controller for Water
Source Heat Pumps Operation and Maintenance
Manual
Each
McQuay water source heat pump can be equipped
with a LonWorks communication module that is
LonMark
3.4certied.Thecontrollerismicroprocessor-
based and is designed to communicate over a
L
onWorks communications network. It can be factory
oreld-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 13. LonWorks Communication Module

McQuay MHC Standard Range Specifications

General

Brand	McQuay
Model	MHC Standard Range
Category	Heat Pump
Language	English