Daikin VAM Series Engineering Data page 57

EDMMT712101
Automatic Ventilation Mode Control by Humidity Sensor (Optional Accessory)
Purpose • Functions
This is a function to enhance energy efficiency and comfort through automatic switching of ventilation mode, which is realized by
performing control in combination of standard temperature sensor and additional indoor (RA) • outdoor (OA) humidity sensor.
Energy-saving ventilation mode
Reduces load on air conditioner by calculating indoor (RA) and outdoor (OA) enthalpy to automatically determine ventilation mode.
Comfortable ventilation mode
Enhances indoor comfort by calculating outdoor (OA) discomfort index to automatically determine ventilation mode.
Unit operation
Energy-saving ventilation mode
When the ventilation mode "Auto" is selected, enthalpy (energy) and dew point temperature of the air are calculated by the indoor/
outdoor temperature sensor (standard) and the humidity sensor (optional accessory) to switch to the optimum ventilation mode in
order to achieve both energy efficiency and condensation prevention.
※
At cooling operation
• Indoor enthalpy > Outdoor enthalpy
• Indoor dew point temperature <
Outdoor temperature -2°C
• Outdoor dew point temperature <
Indoor temperature -2°C
Heat exchange
mode operation
• Indoor enthalpy ≤ Outdoor enthalpy -
5kJ/kg air
• Indoor dew point temperature ≥
Outdoor temperature -1°C
• Outdoor dew point temperature ≥
Indoor temperature -1°C
※ C ooling/heating mode is determined as follows:
① During interlocked operation with air conditioner...According to the operation mode of the interlocked air conditioner
② During independent operation of Heat Reclaim Ventilator Unit...Based on self-judgment (judgment by indoor/outdoor temperature
sensor)
Comfortable ventilation mode
When the ventilation mode "Auto" is selected, enthalpy (energy) and dew point temperature of the air are calculated by the indoor/
outdoor temperature sensor (standard) and the humidity sensor (optional accessory) to switch to the optimum ventilation mode for
both energy efficiency and condensation prevention.
Field settings using remote controller
Mode
No.
Ventilation mode
switching control 19 (29)
setting
Factory default setting
Essential optional accessory
Humidity sensor: BRYH241A100 (for RA), BRYH242A100 (for OA)
VAM-HVE/HVLT Series
Bypass
mode
operation
• 70 - Outdoor discomfort index ≤ 4
• Indoor dew point temperature <
Outdoor temperature -2°C
• Outdoor dew point temperature <
Indoor temperature -2°C
Heat exchange
mode operation
• 70 - Outdoor discomfort index ≥ 6
• Indoor dew point temperature ≥
Outdoor temperature -1°C
• Outdoor dew point temperature ≥
Indoor temperature -1°C
Setting position
Setting switch
No.
01
Energy efficient
12
ventilation
At heating operation
Heat exchange
mode operation
operation
02
Comfort
Ventilation
※
• Indoor enthalpy < Outdoor enthalpy
• Indoor dew point temperature <
Outdoor temperature -2°C
• Outdoor dew point temperature <
Indoor temperature -2°C
• Indoor enthalpy ≥ Outdoor enthalpy -
5kJ/kg air
• Indoor dew point temperature ≥
Outdoor temperature -1°C
• Outdoor dew point temperature ≥
Indoor temperature -1°C
Bypass
mode
Control System
Bypass
mode
operation
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