TRAINING Operational, Maintenance & Trouble Air Cooled - Water Cooled Package

TRAINING Operational, Maintenance & Trouble Air Cooled - Water Cooled Package

PENDAHULUAN Pendinginan adalah suatu proses penarikan kalor (Heat) dari suatu benda /zat sehingga temperaturnya lebih rendah dari keadaan semula. Teknik pendingin adalah usaha untuk menurunkan temperatur suatu benda / zat. Jadi proses pendinginan baru terjadi bila ada kalor yang berpindah dari benda/zat yang akan didinginkan ke benda lain.

PRINSIP DAN SISTEM PENDINGINAN 1. Proses penguapan : Pada temperatur rendah, refrigeran pada tekanan rendah menyerap kalor dari medium sekelilingnya. 2. Proses Kompresi : Uap refrigerant yang mempunyai tekanan dan temperatur rendah kemudian di kompresi sehingga tekanan dan temperaturnya naik. 3. Proses Kondensasi : Uap refrigerant yang bertekanan dan bertemperatur tinggi ini kemudian mengembun (Kondensasi). Pada proses kondensasi, refrigerant melepaskan sejumlah kalor yang diberikan kepada medium sekelilingnya. 4. Proses Expansi : Refrigerant yang dalam fasa cair kemudian mengalami proses ekspansi sehingga temperatur dan tekanannya turun.

SIKLUS PENDINGINAN 3. KONDENSOR 4. KATUP EKSPANSI 2. KOMPRESSOR 1. EVAPORATOR

1. EVAPORATOR A mixture of liquid and vapor refrigerant B refrigerant vapor air

FINNED - TUBE EVAPORATOR liquid/vapor refrigerant airflow airflow refrigerant vapor

PLATE EVAPORATOR All chiller BPHE Compact size High efficiency Low fouling factor

SHELL AND TUBE EVAPORATOR chilled water supply baffles chilled water return tube bundle refrigerant vapor liquid/vapor refrigerant

2. COMPESSOR Semi Hermetic Compressor Scroll American Standard Inc. 2000 Helical-rotary Centrifugal Air Conditioning Clinic TRG-TRC004-EN

SCROLL COMPRESSOR dome scrolls discharge opening motor suction opening

SCROLL COMPRESSOR stationary scroll discharge discharge port driven scroll intake motor shaft intake

SCROLL COMPRESSOR journal bearing motor shaft direction of rotation driven scroll

SCROLL COMPRESSOR intake discharge port intake

SCROLL COMPRESSOR intake phase compression phase discharge phase

SCROLL COMPRESSOR

PART SCROLL COMPRESSOR

3. CONDENSER C refrigerant vapor D liquid refrigerant outdoor air

WATER COOLED CONDENSER 95ºF [35ºC] hot, refrigerant vapor cooling water 85ºF [29ºC] subcooled, liquid refrigerant subcooler

COAXIAL CONDENSER

EVAPORATIVE CONDENSER fan refrigerant vapor condenser coil liquid refrigerant sump subcooler pump

4. EXPANSION A mixture of liquid and vapor refrigerant liquid refrigerant D

TXV OPERATION 49ºF [94ºC] valve diaphragm spring 97 psia [0.67 MPa] suction line 79 psia [0.54 MPa] 79 psia [0.54 MPa] valve pin 18 psi [0.13 MPa]

TXV OPERATION evaporator diaphragm remote bulb spring suction line external equalizer distributor

REFRIGERATION SYSTEM condenser C high-pressure side Discharge line liqui d B compressor line D expansion device A evaporator Suction line low-pressure side

Water Cooled Package System Design GEHB GEHB GEHB SWUT SWUT SWUT Cooling tower WCVS WCVS WCVS Main System Pump Similar to chilled water Systems, but using a single pipe system Standby System Pump

COOLING TOWER propeller fan sprays fill outdoor air sump 85ºF [29ºC] to condenser from condenser 95ºF [35ºC]

Air-Cooled Condenser propeller fan condenser coil subcooler outdoor air

COMPONEN SYSTEM

CONDENSER WATER PIPING COMPONEN

CLEANING CONDENSER

REFRIGERANT LINE SERVICE

EVACUATION PROCEDURE Pressure Test the Unit. Open both manifold valves to pressurize both sides of the system. 150 to 300 psi / (1034 to 2068 kpa). Leak test the unit Remove all dry nitrogen from the unit Connect up your vacuum pump Start vacuum pump Check the vacuum level 350 microns or lower. Close the vacuum pump isolation valve and observe the micron gauge.

MAINTENANCE PROCEDURES Clean the air filter Clean Evaporator Coil Check the drain from operation Check the blower & fan motor from operation Check the motor fan blower amperage Check the V-Belt from operation Check the Pulley & bearing ball from operation Check the electric thermostat from operation Clean water strainer Check gate valve opening Check water flow switch from operation Clean the condenser coil Check the power supply voltage Check the electrical connection Check the contactor from operation Check the motor compressor amperage Check Oil level On Said Glass Check the motor compressor amperage Check the fan motor condenser operation Check the fan motor amperage Check the unit refrigerant charge Check the room temperature

TROUBLE SHOOTING

TROUBLE ANALYSER