Control System
EDMMT712101
52
VAM-HVE/HVLT Series
Airflow Rate Increase during Bypass Mode
Purpose
•
Functions
Enhances outside air cooling effect during the intermediate
periods by increasing the airflow rate of bypass mode.
POINT
When a CO
2
sensor is installed, this function is disabled as the
unit follows the fan control by the CO
2
sensor.
Unit operation
When switched to bypass mode during “Auto” ventilation
mode, the airflow rate is automatically increased.
Switch number that needs to be changed for the system
Field settings using remote controller is required.
Field settings using remote controller
Setting
descriptions
Mode
No.
Setting
switch
No.
Setting position
01
02
03
04
Setting airflow
rate increase
during during
bypass mode
19 (29)
14
Increase
No
Airflow
rate
Increase
Ultra high
Fixed
High
Fixed
Factory default setting
Fan notch when airflow rate increase is set
Ventilation
fan
field setting
Remote controller
Airflow
rate
Ventilation mode
Heat
exchange
mode
Bypass
mode
Normal
Low
Low
High
High
High
Ultra high
Ultra high
Low
Low
High
High
Ultra high
Ultra high
Protective Operation Control during Cold Season
Purpose • Functions
Controls the fan operation to prevent condensation on the main unit and freezing of heat exchange elements when outside air
temperature drops.
Unit operation
When indoor humidity sensor (optional accessary) is not used
Outdoor air (OA)
temperature
Air supply/exhaust fan operating time
-10˚C and above
Continuous operation
-10~-15°C
Air supply: ON for 45 minutes/OFF for 15 minutes
Exhaust: Continuous operation
-15°C or below
Both air supply and exhaust: ON for 5 minutes/OFF
for 55 minutes
When indoor humidity sensor (optional accessary) is used
Air supply/exhaust fan
operating time
Indoor (RA) absolute humidity (Unit: g/kg(dry air); the figure in parenthesis is relative humidity at 25°C)
4.9 (25%) or below
4.9~6.9 (35%)
6.9~8.9 (45%)
8.9~9.9 (50%)
9.9 (50%) and above
Outdoor air
(OA)
Temperature
-10°C and above
Continuous operation
-10~-15°C
Air supply: ON for 45 minutes/OFF for 15 minutes
Exhaust: Continuous operation
Air supply: ON for 30
minutes/OFF for 30
minutes
Exhaust: Continuous
operation
Air supply: ON for 15
minutes/OFF for 45 minutes
Exhaust: Continuous
operation
-15~-20°C
Air supply: ON for 30
minutes/OFF for 30 minutes
Exhaust: Continuous
operation
Air supply: ON for 15
minutes/OFF for 45 minutes
Exhaust: Continuous
operation
Both air supply and exhaust:
ON for 5 minutes/OFF for
55 minutes
-20°C or below
Optional accessory: Humidity sensor (for RA) BRYH241A100
Summary of Contents for VAM Series
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Page 4: ...EDMMT712101 2 Table of Contents 17 6 Precautions for Design and Installation 181 ...
Page 56: ...Control System EDMMT712101 54 VAM HVE HVLT Series C 3P343420 1E ...
Page 138: ...Installation Manual EDMMT712101 136 VAM HVE HVLT Series 3P607378 3C ...
Page 139: ...EDMMT712101 Installation Manual VAM HVE HVLT Series 137 3P607378 3C ...
Page 141: ...EDMMT712101 Installation Manual VAM HVE HVLT Series 139 C EM20A032 ...
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Page 147: ...EDMMT712101 Details of Optional Accessories VAM HVE HVLT Series 145 3P607378 3C ...
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