Daikin VAM-FA Technical Data Manual page 78

15 Control systems
15 - 4 Applicable patterns
15 - 4 - 1 Additional functions
Fresh-up operation by external input [HRV unit]
Purposes and functions
1
When the operation is interlocked with the local ventilating fan
(such as the one for toilet or kitchen), the HRV unit performs the
over-supply operation to prevent the reverse flow of the odor.
15
The flow rate of supply air becomes higher than that of exhaust
air.
76
• Heat reclaim ventilation • VAM-FA/FB
• Ventilation • Heat reclaim ventilation
Example of control wiring
Connecting line can be extended up to 50 m maximum.
J1 J2 JC F1 F2
SS1
X11A
X9A
X10A
P1 P2
HRV unit
P1 P2
Remote control for HRV unit
• Local wiring
Operation of HRV Terminal for local
unit connection
Fresh-up Short-circuit
Normal Open circuit
Note:
The connecting wiring between HRV unit and the terminal for
local connection can be extended up to 50 m maximum.
Switch setting of HRV unit
• No change is required (factory setting)
Optional accessories required
• None
(Terminal for local connection)
(HC0032)
Capacity of connecting
terminal
No-voltage normally
open contact for micro-
current 16 V, 10 mA