Daikin WMC Specifications download pdf (Page 10)

10 Catalog 602-2

 Demand limit control. Maximum motor current

draw can be set on the panel, or can be adjusted

from a remote 4-20 ma or 1-5 VDC BAS

signal. This feature controls maximum demand

charges during high usage periods.

 Condenser water temperature control.

Capable

of four stages of tower fan control plus an

optional analog control of either a three-way

tower-bypass valve or variable speed tower-fan

motor. Stages are controlled from condenser-

water temperature. The three-way valve can be

controlled to a different water temperature or

track the current tower stage. This allows

optimum chilled water plant performance based

upon specific job requirements.

 Staging Options (Multiple Chiller

Installations). Lead-lag and load-balance: the

MicroTech II controller is capable of

compressor lead-lag decisions and balancing

compressor loads between two compressors on

one unit or two separate Magnitude chillers,

using defaults or operator defined staging. For

example, in the 30 to 60 percent load segment,

one compressor running on each of two chillers

will provide better efficiency than two

compressors running on one chiller.

 Plotting Historic Trends

. Past operation of the

chiller can be plotted as trend lines and even

downloaded to spread sheets for evaluation - a

valuable tool for optimizing efficiency.

Versatile Communications Capabilities

Give You Even More Control

For complete flexibility there are four ways to

interface with the MicroTech II controller:

1. Direct entry and readout locally at the operator

interface panel on the unit.

2. Direct entry as above plus digital and analog

input/output signals for certain functions such

as: enable run input, alarm signal output, 4-20

ma or 0-5 VDC inputs for chilled water reset

and load limiting, pump and tower fan control,

analog output for variable speed fan and tower

bypass.

3. Interface with BACnet, L

ONWORKS, or

Modbus.

4. Direct communication between three

Magnitude WMC chillers (not compatible with

WME models).

Building Automation Systems

All MicroTech II controllers are capable of

communications providing seamless integration

and comprehensive monitoring, control, and two-

way data exchange with industry standard

protocols LonTalk

®

or BACnet or Modbus.

Open Choice Benefits

 Easy to integrate into your building automation

system supplier of choice

 Factory- or field-installed communications

module

 Provides efficient equipment operation

 Integrated control logic for factory options

 Easy-to-use local user interface

 Owner/designer can select the BAS that best

meets building requirements

 Comprehensive data exchange

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