What are the safety devices in chiller?

What are the safety devices in chiller?

Next, the low-temperature chiller manufacturer will give you information on how to safely operate the four major protection devices for industrial chillers. Protection safety valve, compressor overheat protection, compressor frequent start protection, abnormal indicator light, etc.

What are the general start up procedures for a chilled water air conditioning system?

Start-up of a chiller normally takes place at light load conditions and begins with the removal of the shut-down tag from the chiller. At this point it is important to verify that the chilled and condenser water valves are in their proper operating positions. Then, the cooling tower and heat exchangers can be filled.

How do you maintain a chiller system?

Fresh air dampers for an air-cooled chiller system should be inspected in the same way as return air dampers.

1. Preventive Maintenance for Industrial Chillers.
2. Maintain your Daily Logs.
3. Keep the Chiller Tubing Clean.
4. Reduce the Temperature of the Condenser Water.
5. Inspect the Condenser Water Loops.
6. Monitor for Refrigerant Leaks.

What are safety controls in HVAC?

Automatic safety controls are those devices installed as a part of your electrical, heating, cooling, water heating and other systems to prevent such things as overheating, high and low pressures, excessively hot water or a surge in electrical current.

How do you start a chiller system?

Ensure that the heat rejection medium is circulating. Start the chilled water pump, make sure that the medium to be cooled is in circulation. Open all liquid line solenoid valves. Slowly open the liquid charging valve allowing system vacuum to draw refrigerant into the system.

How do you operate a chiller?

In most process cooling applications, a pumping system circulates cool water or a water/glycol solution from the chiller to the process. This cool fluid removes heat from the process and the warm fluid returns to the chiller. The process water is the means by which heat transfers from the process to the chiller.

What are the basic functions of chillers?

A chiller provides consistent temperature and pressure to your industrial process. Eliminating temperature and pressure variables simplifies the process development and optimization, ensuring the highest quality product. Instead of a wasteful, single-pass-through system, a chiller recirculates the cooling water.

What should you do during a chiller shutdown?

ASHRAE Guideline 12 recommends draining chillers during extended shutdowns. Maintaining a clean and dry environment helps prevent localized corrosion, fouling, and bacterial growth.

How to do a preventive maintenance on a chiller?

Chiller Preventive Maintenance Procedure 1 Prior to the work, wear safety shoes, gloves and goggles. 2 Prepare jet pump, screw driver, hose clamp, chemical cleaning agent (if required), flexible hose, extension cord and control panel door key. 3 Switch OFF the chiller unit. 4 Open the isolator switch.

How much water does an industrial chiller need?

The rate of flow of chilled water must be maintained to ensure satisfactory chiller cooling performance. Chillers need between 2.5 and 3 gallons per minute (GPM) per ton to provide efficient heat exchange. You will typically see a 10°F temperature exchange at 2.5 GPM per ton, and an 8°F temperature exchange at 3 GPM per ton.

Why are there safety controls on a refrigerant chiller?

Every chiller usually has safety controls that are designed to protect the cooling system from harm because of low refrigerant temperature, low oil pressure, or high condensing pressure.