ActronAir ESP Digital SRD131C Installation And Commissioning Manual

Installation and Commissioning Guide - Split Ducted ESP Digital UnitsDoc. No.0525-077 Ver. 2 200129Installation and Commissioning Guide Split Ducted ESP Digital30NOTES• Accurate pressure and temperature measuring tools should be used to achieve satisfactory results.• The sensor of a thermocouple must be in good contact with the area being measured and must be insulated inorder to obtain correct reading.See Diagram Below(SRD131C - SRD151C shown for illustration purposes only)* Use weighing scale when addingor removing refrigerant charge.SERVICEGAUGESR-410A *REFRIGERANTCONTAINERDISCHARGESCHRADER VALVESUCTIONSCHRADER VALVENOTESFor illustration purpose only. Valve locationmay vary depending on unit model.Checking for Subcooling:1. From the R-410A Pressure/Temperature Chart record the corresponding Saturated Condensing Temperature(SCT) at the given discharge pressure.2. Calculate the system subcooling using the formula below:Subcooling = SCT - LLT3. If subcooling is within the range (see charging table), there is no need to add/remove refrigerant.• If subcooling is lower than minimum, the system is undercharged, it is necessary to add refrigerant.• If subcooling is higher than maximum, the system is over charged. It is necessary to remove refrigerant.Allow the systems to stabilise (15-30 mins) and repeat the step 1-3 until subcooling falls within the range specified inthe table below.Checking for Superheat:Maintaining the correct superheat is important for ensuring the evaporator is achieving maximum capacity andavoiding excessive liquid refrigerant returning to the compressor.1. From the R-410A Pressure/Temperature Chart record the corresponding Saturated Suction Temperature (SST)at the given suction pressure.