Daikin WMC Specifications download pdf (Page 9)

Catalog 602-2 9

Figure 2, MicroTech II Home Screen

If an alarm occurs, a red button appears on the

screen (a remote signal is also available). Pressing

this button immediately accesses the Active Fault

Screen that gives complete fault information. The

problem can be fixed and the fault can be quickly

and easily cleared at this point.

Changing Setpoints

The mystery of changing set points is a thing of the

past. Look at how easy the job becomes with the

Daikin McQuay MicroTech. For example, to

change the chilled water set point, press SET from

any screen, then press the WATER button and this

screen appears, press button #1, Leaving Water

Temperature, and you are ready to input a new

value. Selected setpoints can also be changed by

the BAS.

Figure 3, MicroTech II Setpoints Screen

Trend Logging

Ever wonder how your chiller performed last

week? Were you holding the required chilled water

temperature? What kind of cooling load did the

chiller have?

The Daikin McQuay MicroTech controller can

record and plot water temperatures, refrigerant

pressures, and motor load in order to trend

performance. These values can also be downloaded

through a convenient USB port in the control

panel, and exported into a spreadsheet for further

evaluation and record purposes.

Figure 4, Trend Logging Screen

MicroTech Controller Increases Chiller

Operating Economy

Many standard features have been incorporated

into MicroTech control in order to maintain the

operating economy of Daikin McQuay centrifugal

chillers. In addition to replacing normal relay logic

circuits, we’ve enhanced the controller's energy

saving capabilities with the following features:

 Direct control of water pumps

. Optically

isolated, digital output relays provide

automatic lead-lag of the evaporator and

condenser pumps, permitting pump operation

only when required.

 User-programmable compressor soft loading

Prevents excessive power draw during pull

down from high unoccupied chilled water

temperature conditions.

 Chilled-water reset

. Accomplished directly on

the unit by resetting the leaving water

temperature based on the return water

temperature. A remote 4-20 ma or 1-5 VDC

BAS signal can also be used to reset the

leaving water. Raising the chilled water

setpoint during periods of light loads

dramatically reduces electrical consumption.

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Daikin WMC Specifications Page 9

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