Control System
EDMMT712101
48
VAM-HVE/HVLT Series
Stand-Alone 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
This is the nighttime free cooling operation function for independent operation system of Heat Reclaim Ventilator Unit. (Including
centralized zone interlock for VAM-H.)
Nighttime free cooling function works even for Heat Reclaim Ventilator Unit independent operation system by setting target
temperature for stand-alone nighttime free cooling during field setting.
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.
Operation pattern (operation image)
Operating conditions
40
30
20
22
:
0 0
OFF
OFF
ON
24
:
0 0
Outdoor temperature
Set temperature
Indoor temperature
Nighttime free cooling operation
→
Next morning
(Time)
Temperature
Total heat exchanger
<Unit operation>
The unit compares the indoor and outdoor temperatures after Heat Reclaim Ventilator
Unit stops for the night. if:
①
The indoor temperature is higher than the temperature setting of Heat Reclaim
Ventilator Unit; and
②
The 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
P1 P2
P1 P2
Heat Reclaim Ventilator Unit
Remote controller
N
N
N
N
Y
Y
Y
Y
N
Y
Heat Reclaim
Ventilator Unit
Operation Stop
<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
time after the air
conditioner stops
> 2, 4, 6, 8
hours
Temperature monitor
(5 minutes)
Heat
Reclaim Ventilator
Unit starts operation
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 s2
& 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
06
07
08
09
10
11
12
13
Nighttime free cooling function
ON/OFF and start time setting
17 (27)
1
OFF
ON•
2 hours
ON•
4 hours
ON•
6 hours
ON•
8 hours
—
—
—
—
—
—
—
—
Airflow rate setting for nighttime
free cooling
6
High
Ultra
high
—
—
—
—
—
—
—
—
—
—
—
Target temperature setting
for stand-alone nighttime free
cooling
7
18°C
19°C
20°C
21°C
22°C
23°C
24°C
25°C
26°C
27°C
28°C
29°C
30°C
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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