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15
• Ventilation • Heat reclaim ventilation
77
• Heat reclaim ventilation • VAM-FA/FB
15 Control systems
15 - 4 Applicable patterns
15 - 4 - 1 Additional functions
Precool / preheat operation
Remote control operation by input from outside
Purposes and functions
• The operation of HRV unit is delayed when the air
conditioner begins operation.
Cautions
1. The precool / preheat function is possible only when the
operation of HRV unit is interlocked to one-group or two-
group of indoor unit.
(It will not function when the HRV unit is in independent
operation.)
2. You can select the preset time of 30 / 45 / 60 minutes for
delayed operation at the time of initial setting.
If this preset time is not sufficient, you can extend the preset
time for further 30 / 60 / 90 minutes only the preheating
function.
3. Since this is two remote control system (for Indoor unit and
HR unit), the Master / Slave setting is required.
Example of control wiring
Switch setting of the HRV unit
The initial setting by the remote control for the indoor unit.
• Precool / preheat On / Off setting
.................................................“ON” [17(27)·2·02]
• Precool / preheat time setting
...........................................“Time” [17(27)·3·*1]
• Preheat extra time setting
...........................................“Time” [17(27)·9·*2]
*1 setting 01 for 30, 02 for 45 and 03 for 60 minutes.
*2 setting 01 for 0 (factory set), 02 for 30, 03 for 60 and 04 for
90 minutes.
Optional accessories required
• None
Purposes and functions
• The HRV unit can be controlled the operation of “On / Off”
remotely by the signal from no-voltage normally open
contact.
Cautions
1. When the system is under group control, the input from
outside controls the operation of “ON / OFF” collectively, if it
is installed in the one of the unit.
Example of control wiring
Switch setting of HRV unit
• No change is required.
Optional accessories required
• None
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