• Heat reclaim ventilation • VAM-FA/FB
1
15
• Ventilation • Heat reclaim ventilation
72
15 Control systems
15 - 3 Basic patterns
15 - 3 - 3 The interlocked operation system
Single-group interlocked operation (Basic pattern)
Single-group interlocked operation (Direct duct connection)
Purposes and functions
• The remote control for indoor unit can control the interlocked
operation with the HRV unit, and it can make an initial setting
of the ventilation flow rate, the ventilation mode changeover
and fresh-up operation. The HRV unit can independently be
operated, even if the indoor unit is not in operation.
Note
1. The remote control should be connected to the terminal no.
P1 and P2, the same as the group control wiring of indoor
units.
2. Since this is two remote control system (for Indoor unit and
HRV unit), the Master / Slave setting is required.
Example of control wiring
Switch setting for HRV unit
• No change is required. (as per factory setting)
Optional accessories required
• None
Purposes and functions
• The operation of HRV unit is interlocked to the indoor unit
connected by the duct, which has a fresh air intake.
• It can reduce the number of outlets for supply air.
• The HRV unit cannot be operated independently to prevent a
reverse stream of fresh air to the suction side of the indoor
unit, unless the fan of indoor is in operation.
Note
1. The amount of fresh air to the indoor unit should be less
than 20% of the total air volume of the indoor unit. (If the
amount of fresh air is too much, the capacity of the indoor
unit may reduce and the operating sound might be higher.)
2. The HRV unit can be operated independently, if the fan of
indoor unit is in operation.
3. Since this is two remote control system (for Indoor unit and
HRV unit), the Master / Slave setting is required.
Example of control wiring
Switch setting for HRV unit
The initial setting by the remote control for indoor unit
Direct duct setting ..................... “ON” [17(27)·5·02]
Optional accessories required
• None
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