lindab | we simplify construction Regula Master HTML Pascal RM display buttons: View alarms Scroll up Red LED Alarm indicator Green LED Write indicator One step OK back ( Left ) C Select ( Right ) Pressure limiter An optional safety function in GRM / SRM to prevent that the system pressure exceeds 200 Pa ( adjustable ) in the supply and extract ducts. Use pressure limiter in AHU. Global RM connected as extern pressure regulator. with 0V = 0Pa, and 10V = AHU max limit. The pressure control and the analog inputs AI3 and AI4 are activated in the Advanced menu with Pascal Operate: System -> Pressure control -> SAF and EAF Typically used when the AHU has extra capacity and a pres- sure limitation function is not included in the AHU controller. Erase Scroll down Confirm Extract Control Regula Master HTML has a built in Extract Control function. The procedure of the function is rather simple. Created ( defined ) Supply RCs are connected to a created ( defined ) Extract RC. The function adds together the airflow from the SRCs con- nected to the same ERC, and sends the request of total summed airflow to the Extract RC which controls the Extract volume flow damper. There is also an option to add a Constant Flow, ( posi- tive or negative ), to the sum of total airflow, as well as a Flow Factor can be applied on the sum of total air- flow in case where more ( or less ) extract is needed. ( Flow factor = Extract/Supply, default 1.00 ). Optimizer function Fan Optimizing function is performed by GRM or SRM, and runs automatically as soon as the system is defined in Regula Master WEB/s. Damper position is read from all Regula Combi that have flow optimization activated. (active as default) via Exoline by LRM and further by GRM. The Fan Optimizing function compares damper positions and regulates the fan output so the value of the damper that is most open at the actual moment is equal to the setpoint value, which can be defined ( default value 85% ). The function is ideally varying the fan pressure between a min. and max. setting in AHU. Do not flow regulate the fans. Fan Optimizing function is one of the features that contributes mostly when it comes to energy savings in HVAC systems. ( Regulation parameters, p-band and I-time are set per default, but can be changed if it is necessary. Note, this can cause system to become instable. ). Operating Control Regula Master HTML has operational control, which is per- formed when the unit is configured as either LRM or SRM. • Regula Master HTML is monitoring SRC damper behavior in the system. • Indicates alarm if a SRC/ERC damper does not move over time. • Indicates alarm if communication with Regula Combi is lost. • Indicates alarm if a presence senor has changed over time. Night Cooling Night Cooling function is a way of cooling down the building with cold outdoor air in night time, to save energy for cooling during day time. It is the AHU controller or BMS system that activates and controls the Night Cooling function in the Pascal system. The GRM/SRM must receive a digital signal, ( at DI2 ), from AHU controller or BMS to activate the Night Cooling function and then GRM/SRM will change mode in all SRC to Unoc- cupied and the cooling setpoint at Unoccupied in all SRC to 15°C ( adjustable ). This is done to make sure the supply dampers will open to AirflowMax initially, but subsequently to regulate the cooling in each room and to obtain the full optimizer function. Lindab reserves the right to make changes without prior notice 3 2020-07-09
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