Daikin WMC Specifications download pdf (Page 8)

8 Catalog 602-2

MicroTech II

Control Features and Benefits

FEATURE BENEFIT

Easy integration into Building Automation System

(BAS) via the exclusive Open Choice™

communication module

Designer can select any BAS supplier using standard

open protocols and know

the MicroTech II control will

interface with it.

Easy to read, adjustable, 15 inch, Super VGA color

touch screen operator interface

Operators can observe chiller operation and easily

select various data screens and change setpoints

Historic trend data-downloadable

Water temperatures, refrigerant pressures, and motor

load plots can provide valuable information for energy

conservation

Precise  0.2 F chilled water control

Provides stability in chilled water system

Proactive pre-shutdown correction of “unusual

conditions” allows chiller to stay online

Activates alarm and modifies chiller operation to

provide maximum possible cooling

Automatic control of chilled water and condenser

water pumps

Integrated lead/lag and automatic engagement of

backup pump

Controls up to four stages of tower fans and

modulation of tower fan and/or bypass valve

Optimum integrated, efficient, control of cooling tower

water based on system conditions

Twenty-five previous alarm descriptions are stored

in memory

Valuable asset for trouble shooting

Onboard operating and maintenance manual Information instantly available (downloadable)

Up to four WMC chillers* can be interconnected

for coordinated operation

Simplifies multi-chiller installations

Designed with the Operator in Mind

Reliable, economic use of any chiller depends

largely on an easy operator interface. That’s why

operation simplicity was one of the main

considerations in the development of the

MicroTech controller. The operator’s interface

with the chiller is through a 15-inch, Super VGA

color monitor with touch-screen capability. The

operator can clearly see the entire chiller

graphically displayed with the key operating

parameters viewable on the screen. Pressing a

single on-screen button will access the set screens

where setpoints can be reviewed and changed, if

necessary. Other screens, such as alarm history,

are easily accessed through touch screen buttons.

See the following page for some typical screens.

By constantly monitoring chiller status, the

MicroTech controller will automatically take

proactive measures to relieve abnormal conditions

or shut the unit down if a fault occurs. For

example, if a problem occurs in the cooling tower

and discharge pressure starts to rise, the controller

will automatically hold the load point and activate

an alarm signal. A further rise in pressure will

initiate compressor unloading in an effort to

maintain the setpoint pressure and stay online. If

the pressure continues to rise, the unit will shut off

at the cutout pressure setting.

The MicroTech controller's memory retains a

record of faults and the time/date stamp. The

controller's memory (no batteries required) can

retain and display the cause of the current fault and

the last twenty-five fault conditions. This method

for retaining the fault is extremely useful for

trouble shooting and maintaining an accurate

record of unit performance and history. The

controller features a two-level password security

system to provide protection against unauthorized

use.

The Home Screen shown in

Figure 2 is usually

used as the prim

ary viewing screen. It provides real

time data on unit status, water temperatures, chilled

water set point and motor amp draw. In other

words, it very clearly answers the vital question: is

the chiller doing what it is supposed to do?

*Note: WMC B-vintage chillers may not be interconnected with any

other model, including WMC A-vintage models. See IM 1029-2 for

more information.

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Daikin WMC Specifications Page 8

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