AS NZS 4234:2021 pdf free.Heated water systems一Calculation of energy consumption一Parameters and outcomes for software simulations.
Detail heat pump operating times [e.g. continuous, off-peak (10 pm to 7 am), extended off-peak (10 pm to 5 pm)], other time control or other strategy (provide separate description of control logic if strategy is not simple time control).
Detail supplementary heating times [e.g. continuous, off-peak (10 pm to 7 am), extended off-peak (10 pm to 5 pm)], other time control or other strategy (provide separate description of control logic if strategy is not simple time control).
Heat pump is on continuous power feed. The HP will operate when the control temperature falls below the set temperature (within the deadband limits) and the ambient air is above the cold temperature cut-off.
Supplementary boosting is on continuous feed. The supplementary booster will operate if the thermostat senses low temperature and is within deadband limits AND the ambient air is below the cold temperature cut-out.
HP set temperature is 60 °C with a DB of 8 and the HP control sensor is at 46 % of the tankvolume. If the HPis not operative then the boost element is operated and has 46 % of the tank volume and the same set temperature. These requirements satisfy legionella sanitation as specified in AS 3498.
Heat pump is on continuous power feed. The HP will operate when the control temperature falls below the set temperature (within the deadband limits) and the ambient air is above the cold temperature cut-off.
Supplementary boosting is on continuous feed. The supplementary booster will operate if the thermostat senses low temperature and is within deadband limits AND the ambient air is below the cold temperature cut-out.
HP set temperature is 60 °C with a DB of 10 and the HP control sensor is at 48 % of the tank volume. If the HP is not operative, then the boost element is operated and has 45 % of the tank volume and a set temperature of 60 °C with a DB of 8. These requirements satisfy legionella sanitation specified in AS 3498.AS NZS 4234 pdf download.