www.advancedco.com345.2 Replacement of ComponentsIn general, all of the components parts used in the construction of the panel have been selected for long life andreliability.However, certain components may require to be changed on a regular service basis. The details of these are asfollows:5.2.1 Liquid Crystal DisplayExpected Life: - > 10 yearsReplacement Schedule: - When the display becomes difficult to read. The display contrast willgradually fade with time.Manufacturer / Part Number: - Replace the complete display / keyboard assembly.5.2.2 BatteriesFor battery installation, see section 3.3.2Respect the Environment.Batteries must be disposed of responsibly and in accordance with any localregulations.5.2.2.1 Standby BatteriesExpected Life: - 3-5 years at an ambient temperature of 20°CReplacement Schedule: - As above. However, note that the expected battery life is shortened byincrease in ambient temperature. The life reduces by 50% for every10°C rise above ambient. Refer to battery manufacturer for furtherinformation.Manufacturer / Part Numbers: - YUASA POWERSONIC2.8AH NP2.8-12 3.2AH PS-12307AH NP7-12 7AH PS-1270STOPFor optimum performance and charge retention, Yuasa recommend thatbatteries are ‘top-charged’ prior to installation.For batteries up to 6 months old from date of manufacture, charge at 2.4V percell (i.e. 14.4V per battery) for 20 hours prior to installing the batteries.It is not recommended to use batteries that are more than 6 months old, fromtheir date of manufacture, on a new installation.It is quite normal for lead-acid batteries to vent hydrogen whenbeing charged.The panel is adequately ventilated to dissipate this hydrogen.DO NOT seal the enclosure or install in a sealed enclosure orcavity.