Daikin WMC Specifications download pdf (Page 6)

Figure 2: Operator Interface Trend History Screen

The controller memory (no batteries required) also retains

the fault history for troubleshooting and monitoring unit

performance. A time/date stamp is associated with each fault.

The fault history can be downloaded through the USB port.

RapidRestore

Mission critical facilities such as data centers and hospitals

are demanding stringent capabilities for chillers to restart and

reach full load operation quickly in the event of a power loss.

With the capability of RapidRestore

, Magnitude

model WMC

chillers are engineered to meet those needs. See Table 1

below for specications.

Table 1: WMC RapidRestore

Times- After Power

Restoration

Compressor Start Fast Loading to 80% Load

43 sec 120 sec*

* Estimated load time. Times may vary depending on operating conditions.

Open Choices

™

BAS Flexibility

The exclusive Open Choices

™

feature provides seamless

integration and comprehensive monitoring, control, and

two-way data exchange using industry standard protocols

LonTalk

, BACnet

or Modbus

. Open Choices

™

offers simple

and inexpensive exibility to use the Building Automation

System (BAS) of your choice without an expensive gateway

panel. Open Choices

™

benets include:

• Easy to integrate into your BAS of choice

• Factory- or eld-installed communications module

• Integrated control logic for factory options

• Easy-to-use local user interface

• Comprehensive data exchange

Certications and Standards

As with many other Daikin Applied chiller products, the

Magnitude

model WMC meets all necessary certications

and standards.

AHRI Certication

Part load performance can be presented in terms of Integrated

Part Load Value (IPLV), which is dened by AHRI Standard

550/590. Based on AHRI Standard 550/590, and as shown

in Figure 3, a typical chiller can operate up to 99% of the time

at off-peak conditions and usually spends most of this time at

less than 60% of design capacity.

Figure 3: IPLV Dened by AHRI Standard 550/590

WMC chillers are rated and certied to AHRI Standard

550/590. The ability of the WMC chillers to achieve very high

part load efciencies, as evidenced by their world-class IPLV

ratings, is due primarily to the use of a variable frequency

drive and the low friction of the magnetic bearing system. For

more information on variable frequency drives, see Integrated

Variable Frequency Drive on page 5.

RapidRestore

– Quickly restores cooling capacity

when power is restored after a power failure

• Compressor Start – Amount of time required for

the chiller to restart

• Fast Loading – Amount of time required for the

chiller to reach a certain load condition

100

1 Percent

42 Percent

45 Percent

12 Percent

Percent Ton-Hour Weighting

Percent Load

CAT 602-4 • MAGNITUDE

MODEL WMC CHILLERS 6 www.DaikinApplied.com

feaTures and benefITs

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