Carrier 16JB Manuel d'utilisateur télécharger pdf (Page 23)

Guide speciﬁcations

Hermetic Absorption Liquid Chiller

Size Range: 108 to 680 Tons (380 to 2392 kW)

Carrier Model Number: 16JB

Part 1 — General

1.01 SYSTEM DESCRIPTION

Microprocessor controlled, single-effect (one-stage)

absorption liquid chiller utilizing hermetic refrigerant

and solution pumps, lithium bromide solution as the

absorbent, and water as therefrigerant. Low pressure

steam or hot water shall be supplied to the generator

as the heat source.

1.02 QUALITY ASSURANCE

A. Chiller performance shall be rated in accordance with

ARI Standard 560 (latest edition).

B. Chillershall bemanufacturedin accordancewithANSI/

ASHRAE 15(latest edition) SafetyCode for Mechani-

cal Refrigeration.

C. The tube side ofthe absorber and evaporator sections

(when applicable) and the tube side of the generator

(for hot water applications) shall be designed, con-

structed and stamped in accordance with ASME Sec-

tion VIII, Division 1 requirements.

D. Each chiller shall undergo a series of standard factory

tests to ensure that the unit is leak tight, that all elec-

trical components operate as intended, and that ev-

ery aspect of unit fabrication meets stringent quality

standards in accordance with good practice and the

manufacturer’s quality assurance requirements.

1. The shell side of each chiller shall be leak tested

by pressurizing to 15 psig (103 kPa) with dry air

and then checked by spraying a soap and water

mixture on all welds, tube joints, and/or gasketed

jointsto identifyany major leaks.Afterward, amass

spectrometer test shall be performed by evacuat-

ing the unit to 0.10 mm Hg absolute, covering the

machine with a vinyl tent and introducing helium

gas under the tent. Any remaining leaks will allow

the helium to be drawn into the shell side of the

machine. The acceptable total leak rate as mea-

sured by the mass spectrometer test shall not

exceed .00002 cc/sec standard air.

2. The tube side of the evaporator, absorber, con-

denser, and (steam) generator shall be hydrostati-

cally tested at 1.5 times rated design pressure and

held for1 hour.For hot waterapplications, a pneu-

matic test shall be performed on the generator at

1.25 times rated design pressure.

3. All machine wiring shall undergo an insulation re-

sistance test. The machine control panel and all

electrical components shall also be functionally

tested to verify continuity and proper electrical

operation.

4. Final assembly inspection shall consist of verifying

that all valves, controls, instrumentation, pumps,

purge components, and all other machine com-

ponents have been properly installed on the

machine.

5. Each unit shall thenbe checked for overall appear-

ance and dimensional accuracy.

6. Final inspection shall be performed on each unit

to check that painting of the unit is as speciﬁed,

nameplate data is correct, and that all accessories

are furnished as required.

1.03 DELIVERY, STORAGE, AND HANDLING

A. Unit shall be stored and handled in accordance with

the manufacturer’s recommendations.

B. Unit shall not be factory-charged with lithium bro-

mide solution to prevent possible internal corrosion

damage from occurring should the inside of the ma-

chine be accidentally exposed to air during shipment

and/or installation. Charging of lithium bromide so-

lution shall be performed at the jobsite in accordance

with the manufacturer’s written instructions.

C. One-piece units shall be shipped under vacuum on

the shell side. Two-piece units shall be shipped with

5 psig (34 kPa) nitrogen pressure.

D. Chiller shall be shipped with nameplates indicating

name of manufacturer, model size, serial number, and

all other pertinent machine data.

E. Chiller shall include shippingrails as standard for ease

of sliding or moving a unit into position to simplify

installation. Neoprene isolation pads shall also be in-

cluded with the machine as standard.

1.04 WARRANTY

Manufacturer shall guarantee the chiller against de-

fects in materials or workmanship for a period of one

year from date of initial operation or 18 months from

date of shipment, whichever occurs ﬁrst. Manufac-

turer shall provide the labor to repair or replace any

part found to be defective in material or workman-

ship within the warranty period.

Part2—Products

2.01 EQUIPMENT

A. General:

Absorption liquid chiller shall include evaporator,

absorber, condenser, generator, solution heat ex-

changer, refrigerant/solution pumps, purge system,

piping, wiring, controls and auxiliaries. Shipment of

the machine shall be in 1 or 2 pieces depending on

model size. Initial charge of lithium bromide shall be

included with the chiller for charging at the jobsite.

Generator shall be designed for operation on either

low pressure steam or hot water as speciﬁed on the

equipment schedule. A U-bafﬂe shall be provided in

both the upper and lower shell to serve as a natural

insulating barrier between sections. The double sump

formed by the U-bafﬂe in the bottom of the absorber-

evaporator section shall allow temporary storage of

refrigerant or solution, thereby reducing service time

and expense by alleviating the need to remove the

ﬂuids from the machine during service and/or main-

tenance operations.

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