SUMMARY This article describes how incoming power problems to your Legacy Chiller may cause intermittent chiller shutdowns. This article shows you how to change your factory settings to make your chiller less sensitive to building power anomalies. SYMPTOMS Intermittent trips of power monitor or phase monitor causes compressor to shut down and may cause an […]
How to Safely Fill a Chiller System Tank
SUMMARY This article explains how to safely fill a chiller system tank. It covers the standard PACT,PWCT,EST sections on the chiller. SYMPTOMS Need to fill a PACT,PWCT,EST tank section on chiller. RESOLUTION Procedure outline: To safely fill the PACT/PWCT stainless steel water storage tank. MORE INFORMATION See attached service bulletin RELATED DOCUMENTS Tank fill bulletin
Chiller loop piping system design
SUMMARY Chiller loops piping systems offered by Legacy Chiller Systems SYMPTOMS Many operational problems can be avoided through proper piping design. CAUSE Improper chiller loop piping design can result in substantial pressure and flow issues that can be costly to correct once the system is installed. RESOLUTION The attached York piping booklet is the best […]
Chiller Problems – Microprocessor Low Pressure error
SUMMARY This article describes how to fix a chiller system that, after startup, has a stopped compressor and a low pressure error. SYMPTOMS Low pressure (Lo1 or lo2) error message on microprocessor controller. After power up and compressor start, compressor stops before reaching the SP1 or SP2 set point and the micro processor indicated a […]
Chiller Problems – Microprocessor Low Flow error
SUMMARY This article explains how to fix your chiller when the compressor won’t run and there is a microprocessor low flow error. SYMPTOMS Low flow error message on microprocessor controller. Compressor will not run. CAUSE Micro-Processor “Low Flo” faults can be caused by: 1. Evaporator flow issues related to your pump. 2. Evaporator flow issues […]
Air Conditioning and Refrigeration Systems – Hot Gas Bypass
SUMMARY This article provides information as to how to limit the minimum evaporating pressure in air conditioning and refrigeration systems during periods of low load. RESOLUTION On many air conditioning and refrigeration systems it is desirable to limit the minimum evaporating pres-sure during periods of low load either to prevent coilicing or to avoid operating […]