HRV-Related
Si30-408
230
Appendix
7.1.2 Single-group Interlocked Operation (Direct Duct Connection)
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 controller 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 controller for indoor unit
Direct duct setting ..........."ON" [17(27)·5·02]
Optional
Accessories
Required
None
Remote controller for
Setting
Indoor unit
Slave
HRV unit
Master
X9A
X10A
X11A
J1 J2
F1 F2
P1 P2
P1 P2
JC
SS1
F1 F2
P1 P2
P1 P2
Indoor unit
HRV unit
Up to 500 m
Remote controller
for HRV unit
(HC0026)
Remote controller
for indoor unit
