Carrier 23XL Specifiche Scaricare il pdf (Pagina 66)

Oil Speciﬁcation — If oil is to be added, it must meet

the following Carrier speciﬁcations:

• Carrier Part Number ...................PP23BZ104

• Oil type .................Inhibited polyolester-based

synthetic compressor lubricant suitable for use

in screw compressors where high viscosity

and compatibility with HCFC 22 and HFC-134a

refrigerants is required.

• ISO Viscosity Grade .........................220

• Speciﬁc Gravity ............................0.981

• Viscosity, cSt at 40 C (104 F) ............210to230

cSt at 100 C (212 F) ............18to21

SSUat100F(38C) ..........1005 ± 45

SSUat210F(99C) .............91±7

• Floc Point (maximum) ...............−90F(−68 C)

• Pour Point (maximum) ...............−6F(−21 C)

• Flash Point (minimum) ...............428F(220 C)

• Moisture Content (maximum) ..............100ppm

• Acid Number (maximum) .........0.5mgKOH/gram

• Miscibility Range with HCFC-22 .......−90to200F

(−68 to 93 C)

with HFC-134a .......−4to180F

(−2 to 82 C)

This product is hygroscopic. Containers should remain

tightly sealed in a clean and dry environment to prevent

moisture absorption from the air.

This oil (part number PP-23-BZ-104) may be ordered from

your local Carrier represesentative.

Oil Separator Coalescer

FRAME 1 AND 2 MACHINES — The oil separator coa-

lescing element is replaceable and has an estimated life of

15 years. Proper maintenance procedures require the coa-

lescer to be changed approximately 100 hours after a major

compressor teardown or machine overhaul.

FRAME 4 MACHINES — Frame 4 machines do not have

a replaceable oil coalescer.

Refrigerant Filter/Drier — A refrigerant ﬁlter/drier, lo-

cated on the motor cooling line should be changed once a

year, or as necessary, if ﬁlter condition indicates a need for

less or more frequent replacement. Change the ﬁlter with the

machine pressure at 0 psig (0 kPa) by transferring the re-

frigerant to the condenser vessel, (if isolation valves are present)

or a storage tank. A moisture indicator (dry eye) sight glass

is located beyond this ﬁlter to indicate the volume of mois-

ture in the refrigerant. If the moisture indicator indicates mois-

ture, locate the source of water immediately by performing

a thorough leak check.

Refrigerant Strainers (Frame 1 and 2 Machines

Only) —

The oil reclaim system has two strainers. One is

located on the eductor suction line, and one on the con-

denser gas line. Replace these strainers once per year, or as

necessary if strainer condition indicates a need for less or

more frequent replacement. Change these strainers with the

cooler/compressor vessel at 0 psig (0 kPa) by transferring

the refrigerant charge to a storage vessel or the condenser.

Inspect Refrigerant Float System — Perform in-

spection every 5 years, if required, or when the machine is

opened for service.

Transfer the refrigerant into the cooler vessel (if isolation

valves are present) or into a storage tank. Remove the ﬂoat

access cover. Clean the chamber and valve assembly thor-

oughly. Be sure that the valve moves freely. Ensure that all

openings are free of obstructions. Examine the cover gasket

and replace if necessary.

Inspect Relief Valves and Piping — The relief valves

on this machine protect the system against the potentially

dangerous effects of overpressure. To ensure against dam-

age to the equipment and possible injury to personnel, these

devices must be kept in peak operating condition.

As a minimum, the following maintenance is required.

1. At least once a year, disconnect the vent piping at the

valve outlet and carefully inspect the valve body and mecha-

nism for any evidence of internal corrosion or rust, dirt,

scale, leakage, etc.

2. If corrosion or foreign material is found, do not attempt

to repair or recondition. Replace the valve.

3. If the machine is installed in a corrosive atmosphere or

the relief valves are vented into a corrosive atmosphere,

make valve inspections at more frequent intervals.

Compressor Bearing Maintenance — The key to

good bearing maintenance is proper lubrication. Use the proper

grade of oil, maintained at recommended level, temperature,

and pressure. Inspect the lubrication system regularly and

thoroughly.

Excessive bearing wear can be detected through in-

creased vibration. If this symptom appears, contact an ex-

perienced and responsible service organization to perform

vibration analysis on the compressor.

Compressor Rotor Check — Use Carrier speciﬁed

oil. Excessive compressor rotor wear is shown by a lack of

performance. If a lack of performance is noted, have the com-

pressor rotors inspected by a trained service person.

The rotors can be visually inspected once every 5 to

10 years or as needed depending on machine operating

conditions.

Inspect the Heat Exchanger Tubes

COOLER — Inspect and clean the cooler tubes at the end of

the ﬁrst operating season. Because these tubes have internal

ridges, a rotary-type tube cleaning system is necessary to fully

clean the tubes. Upon inspection, the tube condition will de-

termine the scheduled frequency for cleaning, and will in-

dicate whether water treatment is adequate in the chilled water/

brine circuit. Inspect the entering and leaving chilled water

temperature sensors for signs of corrosion or scale. Replace

the sensor if corroded or remove any scale if found.

CONDENSER — Since this water circuit is usually an open-

type system, the tubes may be subject to contamination and

scale. Clean the condenser tubes with a rotary tube cleaning

system at least once per year and more often if the water is

contaminated. Inspect the entering and leaving condenser wa-

ter sensors for signs of corrosion or scale. Replace the sen-

sor if corroded or remove any scale if found.

Higher than normal condenser pressures, together with the

inability to reach full refrigeration load, usually indicate dirty

tubes or air in the machine. If the refrigeration log indicates

a rise above normal condenser pressures, check the con-

denser refrigerant temperature against the leaving condenser

water temperature. If this reading is more than what the de-

sign difference is supposed to be, then the condenser tubes

may be dirty or water ﬂow may be incorrect. Because HCFC-22

and HFC-134a are high-pressure refrigerants, air usually does

not enter the machine; instead the refrigerant leaks out.

During the tube cleaning process, use brushes especially

designed to avoid scraping and scratching the tube wall. Con-

tact your Carrier representative to obtain these brushes. Do

not use wire brushes.

1 2 ... 61 62 63 64 65 66 67 68 69 70 71 ... 103 104

Commenti su questo manuale

Nessun commento

Carrier 23XL Specifiche Pagina 66

Commenti su questo manuale

Prodotti e manuali riguardandi no Carrier 23XL