Daikin WMC Specifications download pdf (Page 55)

Catalog 602-2 55

common and the chiller shall be capable of running on one compressor with the other compressor or any

of its auxiliaries inoperable or removed.

B. Each chiller shall be factory run-tested under load conditions for a minimum of one hour on an AHRI

qualified test stand with evaporator and condenser water flow at job conditions (excluding glycol

applications). Operating controls shall be adjusted and checked. The refrigerant charge shall be adjusted

for optimum operation and recorded on the unit nameplate. Units operating with 50-Hz power shall be

tested with a 50-Hz power supply. Any deviation in performance or operation shall be remedied prior to

shipment and the unit retested if necessary to confirm repairs or adjustments. Manufacturer shall supply

a certificate of completion of a successful run-test upon request.

-- OR –

B. Each chiller shall under go a [one] OR [two] OR [three] OR [four] or [five] or [ten] point certified

factory performance tested on an AHRI qualified test stand with water at job conditions (excluding

glycol applications). A manufacture’s engineer shall oversee the testing, certify the accuracy of the

computerized results, and then translates the test data onto an easy-to-read spreadsheet provided to the

owner. The tests are to be run as specified in advance and are run to within AHRI tolerance of capacity

and power. 50 Hz units are run tested at 60 Hz to their maximum motor power. Operating controls shall

be adjusted and checked. The refrigerant charge shall be adjusted for optimum operation and recorded

on the unit nameplate. Units operating with 50-Hz power shall be tested with a 50-Hz power supply.

Any deviation in performance or operation shall be remedied prior to shipment and the unit retested if

necessary to confirm repairs or adjustments.

--OR--

B. Each chiller shall under go a [one] OR [two] OR [three] OR [four] or [five] or [ten] point certified

witness performance test on an AHRI qualified test stand with water at job conditions (excluding glycol

applications). A manufacture’s engineer shall oversee the testing in the presence of the owner or

owner’s representative, certify the accuracy of the computerized results, and then translates the test data

onto an easy-to-read spreadsheet provided to the owner. The tests are to be run as specified in advance

and are run to within AHRI tolerance of capacity and power. 50 Hz units are run tested at 60 Hz to their

maximum motor power. Operating controls shall be adjusted and checked. The refrigerant charge shall

be adjusted for optimum operation and recorded on the unit nameplate. Units operating with 50-Hz

power shall be tested with a 50-Hz power supply. Any deviation in performance or operation shall be

remedied prior to shipment and the unit retested if necessary to confirm repairs or adjustments.

C. [Optional] A certified sound test shall be performed in accordance with AHRI 575 on each chiller at

full load conditions. A manufacturer’s engineer shall oversee the testing and provide a complete sound

report.

2.3 DESIGN REQUIREMENTS

General: Provide a complete water-cooled, semi-hermetic oil-free centrifugal compressor water chiller as

specified herein. The unit shall be provided according to standards indicated in Section 1.2. In general,

unit shall consist of one or two magnetic bearing, completely oil-free centrifugal compressors,

refrigerant, condenser and evaporator, and control systems including integrated variable frequency

drive, operating controls and equipment protection controls. Chillers shall be designed to operate within

an ambient temperature range of 20ºF to 130ºF with a maximum humidity of 95% (non-condensing)

and shall be charged with refrigerant HFC-134a. If manufacturer offers a chiller using any HCFC

refrigerant that is subject to phase out by the Montreal Protocol or the U.S. Clean Air Act, manufacturer

shall provide, in writing, documentation signed by an officer of the company assuring refrigerant

availability and price schedule for a 20-year period.

A. The entire chiller system, including all pressure vessels, shall remain above atmospheric pressure during

all operating conditions and during shut down to ensure that non-condensables and moisture do not

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Daikin WMC Specifications Page 55

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