The chiller costs less to purchase and install than other chillers in its class, and operates quietly and efficiently.Although all components of your chiller are covered under the factory warranty, having a spare component in-house will eliminate the time lost while waiting for the replacement to ship from Glen Dimplex Thermal Solutions.
Please read our Privacy Policy to find out how we protect and manage your data. Please click submit only once it may take a short time to process. Custom solutions that perform in extreme ambient conditions as low as -20F. Our cooling expertise and responsive customer service are available in several options as well as the ability to develop a customized OEM design. Please remember that refrigerant can be harmful if ingested and even cause death, especially inside an enclosed area. There are several issues or conditions that can cause these alarms. Here we will cover the most common causes and the steps that you can do to remedy, diagnose, and even repair. The goal of this article is not to eliminate the services of a Refrigeration Service Technician, but perhaps minimize these calls to save both you and your service technicians time. The possible causes for this alarm could cause compressor and evaporator failures, and should be investigated as soon as the alarm is detected. In extreme cases, evaporator freeze-up can cause catastrophic system failures; for example, a ruptured evaporator can not only ruin your entire chiller system, but also contaminate your entire glycol piping loop with refrigerant and oil. Before resetting a freeze alarm, always investigate to see if you can determine what could have possibly caused the alarm to trip. You must make sure that when all of the pumps are on, there is enough glycol to prevent pump cavitation (the sucking of air into the pump) which stops the glycol flow and cause an almost immediate freeze up. All of this easily preventable with a simple test or check of the glycol tank. Chiller Pump Diagram Manual Or ContactThere are many different Freeze or Flow Safety Controls, please refer to the Owner Manual or contact the manufacturer if you are unsure how to reset, or where this control is located. We can investigate a little further to try and find a cause for the freeze alarm. If the rotation of a centrifugal pump is reversed it will still pump glycol, but only a fraction of the design flow. The reduced flow will result in reduced refrigerant temperatures in the evaporator, often causing a system freeze up. Pump rotations vary, there should be a rotation indicator on the motor. The most common rotation is clockwise when you inspect from the motor end of the pump. If you find the rotation is incorrect, you will need to switch any two motor leads. There might be a restriction in the piping, or possibly a valve was closed, the pump has simply failed, or perhaps you recently added fermenters increasing the load on this pump- all of these can cause flow issues leading to freeze alarms. If you have lost a single leg of power and reset without correcting this fault, permanent motor damage could result. We strongly recommend you consult with a certified technician or electrician to confirm this. The cause could be a failed pump motor, loose wire connections, or even a defective overload- this should be left to a service technician to diagnose. In addition to an actual freeze situation, a Freeze Alarm can also be the result of low refrigerant charge. Most Chiller Systems are supplied Liquid Line Sightglasses, these are located in the liquid refrigerant line that feeds your expansion valve. When the compressor starts you will see bubbles in this Sightglass, the bubbles should quickly disappear and the Sightglass should clear. If after 60-90 seconds you still see bubbles in this Sightglass, its a good indication that your system is low on refrigerant. ![]()
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