What is the function of Catch-All-Filter-Drier in HVAC System?

The Catch-All-Filer-Drier is a consumable, brilliant gadget that can dispose of the considerable number of shortcomings of free-filled reenactment by embellishing a mix into a spongy center.


The center gives a great filtration framework, particularly for dampness, earth, acids, and waste without the likelihood of desiccant powdering, pressing, and getting away into the framework.

Refrigeration Cycle of Centrifugal Chiller

What are the Refrigeration Principles?

1. Heat always moves from a warm area to a cooler area.

2. To cool an area, heat must be removed from it.

3. Heat can be removed from an area by evaporating a liquid, such as a refrigerant, or by compressing a gas to a liquid.

4. Heat transfer can be increased by increasing the temperature difference between the two areas.

5. To create a cooling effect, the temperature of an area must be lower than the temperature of the surrounding environment.

6. The efficiency of a refrigeration system depends on the type of refrigerant and the design of the system.

Fig: Refrigeration Cycle System Diagram for Centrifugal Chiller

What is the Refrigeration Cycle of a Centrifugal Chiller?

Fig: Sectional Diagram of Chiller Evaporator

What is Evaporator and How Does it Work in a Chiller

This weight drop of the fluid refrigerant the second development gadget to streak and the subsequent blend of fluid and vapour enter the low-weight council of the economizer. 

How Chiller Motor works for Long Time keeping Cool

Fig: Hermetic Motor  Cooling System

How Chiller Motor works for a Long Timekeeping Cool

How chiller motor keeps cooling is an important issue because chiller normally works continuously and need to keep cooling; so how chiller motor keeps cooling. 

A motor is used to rotate the impeller(s). A direct-drive motor is connected directly to the impeller shaft and the impeller rotates at the same speed as the motor. 

Electric Actuator RA-300 User Manual and Specification

Specification and User Manual for Electric Actuator R-300

The RA-3000 series synchronous motor-driven reversible actuators are generally available for 3-point (floating) or with electric positioned for 0…10 V control.

You will get feature factory-calibrated pressure switches to provide specified close-off ratings.

The RA-3000 series actuators are available in three sizes 1600 N, 1800 N, and with 3000 N nominal force and can be used with JC-fanged valves according to the maximum close-off pressure ratings specified.

Electric ON/OFF Actuator VA-7010 Control Manual: Johnson Control

Johnson Control Electric ON/OFF Actuator User Manual 

The Johnson Control VA-7010 electric on/off actuator user manual provides you a two-position (open-closed) control and can easily be mounted with a threaded coupling onto VG5000 forged brass valves operation and wiring manual that will help to run your HVAC system very smoothly with minimum breakdown.

Danfoss Quick Reference Manual Guide Book

Quick Reference Book for Danfoss HVAC Equipment Operation, Maintenance and Troubleshooting Guides.

Hope this article will help you if you are doing your work with Danfoss HVAC (Heating Ventilating and Air Conditioning) system equipment like- Chiller, Air Handling Unit, Automation Drives or Frequency converter, Temperature controller, Microdrives etc. 

As HVAC equipment operating without breakdown, maintenance in periodic preventive or breakdown and troubleshooting during emergency breakdown maintenance, you must keep the Danfoss quick reference book in your reference self.

Why Purge System Is Required For Refrigerant and How Does It Operate in Chiller Compressor

Fig: Refrigerant Purging System Diagram

Why Purge System Is Required For Refrigerant and How Does It Operate in Chiller Compressor

Purge operation system for refrigerant in chiller compressor is carry-out to remove air and moisture; 

MECHANICAL EQUIPMENT FOR INSPECTION AND TESTING

Mechanical Equipment for Site Inspection and Testing During Erection

Water Treatment Plant Major Equipment

The extent of testing during erection should include, but not be limited to, the following.

Checking the accuracy and alignment of plant erection. The accuracy should comply with the relevant standards, the specification or the plant manufacturer’s requirements as may be applicable or where no requirements exist, to a standard to be agreed between the Engineer and the service provider.

Checking the alignment of rotating equipment is to the manufacturer’s requirements.

Non-destructive testing of site welds as required by the relevant standard and as detailed in the specification.

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Types of Test during Erection

The types of test should be carried out in site as per nature of works. Particular for this project the types will be as below:

Hydro-static Test

Hydro-static testing of pipe work systems at a pressure of 1.5 times the design pressure but not less than 4.5 bars for a period of working hours, or at such other conditions as may be required by the pipe work design code.

Hydro-static tests should be carried out on steam generating units in accordance with the boiler design code.

 

Air-Pressure Test

Air piping should be subjected to an air pressure test rather than a hydro-static test.

Vessel Test by Hydro-static

Site fabricated tanks and vessels should be subjected to hydro-static tests in accordance with the relevant standards.

Draining after Test

After the hydro-static test is carried out, the complete assembly should be drained and any non-drain-able sections should be injected with an oxygen-absorbent chemical and elements plugged.

 

Test for Site Fabricated Stuff

Pressure vessels and other parts including pipe work that is made up on site and is subject to pressure or vacuums under normal or abnormal working conditions, should be subjected to a site hydraulic test at approved pressures and for approved periods in accordance with the relevant standard. Where no appropriate standard exist the hydraulic test pressure should not be less than 1.5 times design pressure or at such pressure to be agreed by the Engineer.

 

Alternating Air Pressure Test

Should, in the opinion of the Service provider and with the agreement of the Engineer, an hydraulic test be impracticable due to excessive loading on foundations other than steel, an air pressure test may be employed in accordance with requirements set out in BS 5500.

Vacuum tests should be carried out at the maximum test vacuum obtainable and the condition maintained for a period of two hours with the system isolated. The Service provider should state in the Schedule of Guarantees the fall in vacuum anticipated during this period but the rate of all should not exceed that which would occur due to the designed air leakage rate being attained.

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Calibration checks on all instrumentation.

Tests to be demonstrate the correct functioning of the control loops, protective devices, interlocks and alarms.

To be flushing out of all pipe-work systems which have not been fully cleaned and sealed before shipping to site. Other tests as specified which have not been previously conducted.

Maintenance Procedure of Centrifugal Water Chiller

Maintenance Procedure of Centrifugal Water Chiller

What is the maintenance procedure of centrifugal water chiller and how keep your chiller on trouble-less operation. Yes, of course maintenance is important fact for this. Proper maintenance not only give you hassle free smooth operation, it also ensure optimize your property operating lifetime. 

Most of manufacturer offer some maintenance rules and procedure of their equipment. If user follows these instruction and carry-out the maintenance work correctly, machinery will give maximum usability.