Room Ventilation Controller

Controls a single room living room fan based on humidity, temperature and CO2. For temperature support, the fan must be assigned to a room control as a source. In addition, the system variable "outside temperature" is required.

Table of Contents


Inputs

Abbreviation Summary Description Unit Value Range
Hi Humidity indoor % 0...100
CO2 CO2 indoor ppm 0...∞
Sat Supply air temperature Used to support temperature control in combination with the Intelligent Room Controller and for frost protection.
If this input is not connected the system variable "Outdoor Temperature" is used. If this variable is not available, support for temperature control and frost protection is not available.
°
Dwc Door/window contact 1 = Open, 0 = Closed - 0/1
P Presence - 0/1
Off Off 1 = control stopped and set to lock - 0/1
Sm Sleep mode Switches off ventilation for the time set in parameter (Smt). After that time, ventilation is resumed. - 0/1
B Boost Stops the control and sets outputs (F), (Fea) and (Fsa) to 100% when 1. The heat exchanger is still controlled automatically. - 0/1
Ex Exhaust air Stops the control and sets outputs (F) and (Fea) to 100% when 1. The heat exchanger is still controlled automatically. This input is only visible in certain configurations. - 0/1
Rtd Reset to default Resets parameters and settings of the block to the default values as specified in the block preset. - 0/1




Outputs

Abbreviation Summary Description Unit Value Range
F Fan Combined supply and exhaust air fan. % 0...100
Fea Fan exhaust air Dedicated exhaust air fan. % 0...100
Fsa Fan supply air Dedicated supply air fan. % 0...100
He Heat exchanger - 0/1
S Status 0: Basic ventilation
1: Increased humidity
2: Supporting temperature control
3: Poor air quality (CO2)
4: Manual stop
5: Window/door open
6: Manual boost
7: Manual App
8: Manual exhaust air
9: Sleep mode
10: Frost protection
- 0...10
AC API Connector Intelligent API based connector. - -




Parameters

Abbreviation Summary Description Unit Value Range Default Value
Hmax Maximum humidity The block will attempt to keep (Hi) below set value. % 0...100 60
CO2max Maximum CO2 (air pollution) The block will attempt to keep (CO2) below set value. ppm 0...∞ 1000
Pet Presence extend time Starts with the falling edge of input (P). Extends presence by the specified time. s 0...∞ 900
Smt Sleep mode timeout Starts with the falling edge of input (Sm). Keeps the device off for the specified time. s 0...∞ 7200
Iva Intensive ventilation absence Value for fan when presence is Off and (Hi) is greater than parameter (Hmax) or (CO2) is greater than parameter (CO2max).
Intensive ventilation stops when (Hi) is less than (Hmax - 3%) or (CO2) is less than (CO2max - 5%).
In temperature mode this value is used as maximum.
% 0...100 100
Bva Basic ventilation absence Value for fan in automatic mode when presence is Off. In temperature mode this value is used as minimum. % 0...100 10
Ivp Intensive ventilation presence Value for fan when presence is On and (Hi) is greater than parameter (Hmax) or (CO2) is greater than parameter (CO2max).
Intensive ventilation stops when (Hi) is less than (Hmax - 3%) or (CO2) is less than (CO2max - 5%).
In temperature mode this value is used as maximum.
% 0...100 60
Bvp Basic ventilation presence Value for fan in automatic mode when presence is On. In temperature mode this value is used as minimum. % 0...100 20
Fpt Frost protection temperature If the outside temperature is below this value, ventilation will be stopped to prevent any damage. WARNING: If no external temperature reading is provided then this safety feature is not operational! - -1




Properties

Summary Description Unit Value Range Default Value
Energy Costs Costs for running this source. Sources that have been configured to be 'Expensive' will only be requested by room controllers if no sources with higher priorities are available. - - -
Extract / Supply permitted Sets whether a fan is permitted to operate as extract only. When active, an extra input is available on the Leaf function block which can be used to start the extract mode. WARNING: If a room has an open fireplace an extract fan in close proximity may result in smoke being pulled into the room! - - -
Maximum Air Exchange Specify the maximum air exchange that the ventilation unit can provide for the current room. You will find information on this in the datasheet of the device manufacturer. This information is used for optimum adjustment of the controller. m³/h 40