Configurable Parameters

This section lists all parameters available to configure according to the requirements of the installed air handling unit model:

1. HeaterMode allows the user to select a single heater or two heaters (where the second heater is mainly used for air dehumidification) and can be set to values:

   1. Heater (select 1 on LCD) for using as a single heater (without humidity control);

   2. PreHeater & ReHeater (2 on LCD) for using as preheater & reheater (for dehumidification function).

2. EnergyRecovMode allows the user to select the model of the exchanger that the air handling unit is equipped with (or to select operation without the exchanger if it does not exist in the air handling unit) and can be set to values:

   1. None (0 on LCD) for non-exchanger (AHU without exchanger);

   2. Wheel (1 on LCD) for wheel exchanger (AHU with wheel exchanger);

   3. Cross Flow (2 on LCD) for crossflow exchanger (AHU with cross-flow exchanger);

   4. Mixing Dampers (3 on LCD) for mixing dampers (AHU with mixing dampers which works as exchanger);

   5. Twin Coil & Return Pump (4 on LCD) for twincoil with pump on return pipe (AHU with twin-coil exchanger with pump on return pipe);

   6. Twin Coil & Supply Pump (5 on LCD) for twincoil with pump on discharge pipe (AHU with twin-coil exchanger with pump on discharge pipe.

3. CoolerMode allows the user to choose the model with or without water cooler (cooling coil with valve and modulating actuator) and can be set to values:

   1. None (0 on LCD) for non-cooler;

   2. Cooler (1 on LCD) for cooler.

4. HumidifierMode allows the user to choose a model with or without the humidifier required to maintain the humidity (selectable steam or water) an can be set to values:

   1. None (0 on LCD) for non-humidifier;

   2. Water Humidifier (1 on LCD) for water humidifier (control and the water pump works when humidification is needed);

   3. Steam Humidifier (2 on LCD) for steam humidifier (permanent start command for humidifier to work while the AHU is running, control works when humidification is needed).

5. EconomizerMode allows the user to use the economizer function for models equipped with an exchanger - thermal energy recovery system (heat and cold) and can be set to values:

   1. None (0 on LCD) for the non-economizer function (for AHU without exchanger or no need for economizer function - not recommended);

   2. Eco Return Temp (1 on LCD) for economizer function based on return temperature (standard for AHU with exchanger);

   3. Eco Enthalpy (2 on LCD) for economizer function based on enthalpy (for AHU with exchanger and humidification function - required outside humidity sensor extra).

6. TempCtrlMode allows the user to select the temperature control method as required and can be set to values:

   1. Cascade Temp (1 on LCD) for cascade temperature control (discharge air temperature control in relation to room (return) air temperature control excluding comfort zone - only for discharge and return AHU systems);

   2. Constant Disch Temp (2 on LCD) for constant discharge temperature control (control of the constant discharge air temperature without the influence of the room (return) air temperature;

   3. Comfort Zone Temp (3 on LCD) for comfort zone temperature control (discharge air temperature control in relation to room (return) air temperature control including comfort zone - only for discharge and return AHU systems).

7. HumCtrlMode allows the user to select the humidity control method as required and can be set to values:

   1. Comfort Hum (1 on LCD) for comfort humidity control (room (return) air humidity control including comfort zone - only for discharge and return AHU systems);

   2. Return Hum (2 on LCD) for return humidity control (room (return) air humidity control excluding comfort zone - only for discharge and return AHU systems);

   3. Disch Abs Hum (3 on LCD) for discharge absolute humidity control (cascade discharge air humidity control in relation to room (return) air humidity control excluding comfort zone - only for discharge and return AHU systems);

   4. Constant Disch Abs Hum (4 on LCD) for constant discharge absolute humidity control (control of the constant discharge air absolute humidity without the influence of the room (return) air humidity. 

8. PlantMode can be set to the values, which are used in the Plant Schedule as event according to the desired operating mode of AHU (read-only in LCD and web server or BACnetIP/Modbus TCP as a variable):

   1. Off (0 on LCD) for switching the unit off (means stop AHU);

   2. Night Cycle (2 on LCD) for night operation with reduced parameters to save energy;

   3. Occupied Period (4 on LCD) for normal operation allowing to obtain air comfort parameters for the user.

Note: Other values for the PlantMode are dedicated for future use.