EDMMT712101
Control System
VAM-HVE/HVLT Series
47
Automatic nighttime free cooling function
Purpose
•
Functions
When the air conditioners are switched off at night, the room temperature raised by OA equipment is cooled by ventilation to reduce
the cooling load when the air conditioner is switched on the next morning
POINT
Nighttime free cooling only works during cooling operation under 1 group interlocking system with commercial multi air conditioners
(multi for buildings) /SkyAir. (It does not work under independent operation system.)
The operation lamp on the remote controller is OFF during the nighttime free cooling operation.
This function cannot be used together with direct duct connection setting.
This function cannot be set during zone interlock with indoor unit.
Operation pattern (operation image)
Operating conditions
40
30
20
22
:
0 0
OFF
OFF
OFF
ON
24
:
0 0
Outdoor temperature
Set temperature
Indoor temperature
Nighttime free cooling operation
→
Next morning
(Time)
Temperature
Total heat exchanger
Air
conditioner
<Unit operation>
The unit compares the indoor and outdoor temperatures after the air conditioner stops
for the night. if:
①
The indoor temperature is higher than the temperature setting of the interlocked air
conditioner; and
②
T
he outdoor temperature is lower than the indoor temperature, the operation
starts, and when the indoor temperature reaches the temperature setting of the air
conditioner, the operation stops.
Example of control wiring
F1 F2
P1 P2
P1 P2
P1 P2
Heat Reclaim Ventilator Unit
Indoor unit
Note) The maximum length of remote controller cord is up to 500m.
Remote controller
N
N
N
N
Y
Y
Y
Y
N
Y
Air conditioner
Operation stops
<Start condition of nighttime
free cooling>
<Stop condition of nighttime
free cooling>
Nighttime free
cooling ON/OFF
Start time setting
“ON: 2, 4, 6, 8
hours later”
Elapsed
timeafter the air
conditioner stops
> 2, 4, 6, 8
hours
Temperature monitor
(5 minutes)
Air
conditioner
starts operation
or Elapsed time after
the temperature
monitor operation
starts > 60
hours
To normal operation
Temperature monitor
standby
(for 60 minutes including
fan operation)
Indoor
temperature >
Temperature setting
+2 & Indoor temperature
> Outdoor
temperature
Indoor
temperature
≦
Temperature setting
or Indoor temperature
≦
Outdoor temperature
or Elapsed time after the
fan operation starts > 60
minutes
Fan operation
(Fan speed: High,
Ultra high)
Fan OFF
Switch number that needs to be changed for the system
Field settings using remote controller is required.
Field settings using remote controller
Factory default setting
Setting descriptions
Mode
No.
Setting
switch No.
Setting position
01
02
03
04
05
Nighttime free cooling function
ON/OFF and start time setting
17 (27)
1
OFF
ON
•
2hours
ON•4 hours
ON•6 hours
ON•8 hours
Airflow rate setting for nighttime
free cooling
6
High
Ultra high
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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 ...
Page 142: ...Installation Manual EDMMT712101 140 VAM HVE HVLT Series C EM20A032 ...
Page 143: ...EDMMT712101 Installation Manual VAM HVE HVLT Series 141 C EM20A032 ...
Page 147: ...EDMMT712101 Details of Optional Accessories VAM HVE HVLT Series 145 3P607378 3C ...
Page 148: ...Details of Optional Accessories EDMMT712101 146 VAM HVE HVLT Series 3P607378 3C ...
Page 149: ...EDMMT712101 Details of Optional Accessories VAM HVE HVLT Series 147 3P607378 3C ...
Page 150: ...Details of Optional Accessories EDMMT712101 148 VAM HVE HVLT Series 3P607378 3C ...
Page 151: ...EDMMT712101 Details of Optional Accessories VAM HVE HVLT Series 149 3P607378 3C ...
Page 152: ...Details of Optional Accessories EDMMT712101 150 VAM HVE HVLT Series 3P607378 3C ...
Page 155: ...EDMMT712101 Details of Optional Accessories VAM HVE HVLT Series 153 4P457318 1D ...
Page 156: ...Details of Optional Accessories EDMMT712101 154 VAM HVE HVLT Series 4P457318 1D ...
Page 157: ...EDMMT712101 Details of Optional Accessories VAM HVE HVLT Series 155 4P457318 1D ...
Page 158: ...Details of Optional Accessories EDMMT712101 156 VAM HVE HVLT Series 4P457318 1D ...
Page 159: ...EDMMT712101 Details of Optional Accessories VAM HVE HVLT Series 157 4P457318 1D ...
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