12
English
[PRECAUTIONS]
There is not need to set the indoor unit address when using
group control. (It is automatically set when the power is turned
on. ) However, since the HRV (outside air processing type) uses
two remote control addresses per unit, the number of units
which can be group controlled is as follows.
10. 6 CONTROL BY 2 REMOTE CONTROLLERS
(Controlling 1 indoor unit by 2 remote control-
lers)
•
When using 2 remote controllers, one must be set to “MAIN”
and the other to “SUB”.
MAIN / SUB CHANGEOVER
(1) Insert a
screw driver into the recess between the
upper and lower part of remote controller and, working
from the 2 positions, pry off the upper part.
(The remote controller PC board is attached to the upper
part of remote controller.)
(2) Turn the MAIN/SUB changeover switch on one of the
two remote controller PC boards to “S”.
(Leave the switch of the other remote controller set to “M”.)
〈〈〈〈
Wiring Method
〉 〉 〉 〉
(See ‘‘ELECTRIC WIRING WORK’’)
(1) Remove the electric parts box lid.
(2) Add remote controller 2 (slave) to the terminal block for
remote controller (P
1
, P
2
) in the electric parts box.
(There is no polarity.)
[PRECAUTIONS]
•
Crossover wiring is needed when using group control and
2 remote controllers at the same time.
•
Connect the indoor unit at the end of the crossover wire
(P
1
, P
2
) to remote controller 2 (slave).
10. 7 COMPUTERISED CONTROL
(FORCED OFF AND ON/OFF OPERATION)
•
Wire specifications and how to perform wiring
Connect the input from outside to terminals T1 and T2 of the
terminal block for remote controller.
•
Actuation
The following table explains FORCED OFF and ON/OFF
OPERATIONS in response to Input A.
•
How to select FORCED OFF and ON/OFF OPERATION
Enter the FORCED OFF and ON/OFF OPERATION selection
using the local “external start/stop input” settings based on
“
11 FIELD SETTING AND TEST RUN
”
10. 8 Central control
If control is performed with a central device (central manage-
ment controller, etc.), group number needs to be set with the
remote controller. See the manual of each central device for
detail.
10. 9 FRESH-UP OPERATION BY EXTERNAL INPUT
(HRV UNIT)
PURPOSES AND FUNCTIONS
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 inflow of the odor from out-
side.
The flow rate of supply air becomes higher than that of exhaust
air.
Both the excessive supply mode(Supply Fresh-up)and the
excessive exhaust mode (Exhaust Fresh-up) are selectable.
In details, contact your dealer.
No. of indoor air
conditioner units
0 1 2 3 4 5 6 7 8 9 10 11 12 13 14
No. of
HRV units
8 7 7 6 6 5 5 4 4 3 3 2 2 1 1
Upper part of remote
controller
Lower part of
remote controller
Insert the screwdriver here and gently work
off the upper part of remote controller.
Only one remote controller
needs to be changed
if factory settings have
remained untouched.
(Factory setting)
S
M
S
S
M
Remote controller
PC board
Remote controller wiring
terminal block
Remote
controller 2
(SUB)
Remote
controller 1
(MAIN)
1
P
2
P
1
F
2
F
1
T
2
T
FORCED
OFF
REMOTE
CONTRL
TRANSMISSION
WIRING
Wire specification
Sheathed wire (2 wire)
Gauge
0.75 - 1.25 mm
2
Length
Max. 100 m
External terminal
Contact that can ensure the minimum
applicable load of 15 V DC, 1 mA.
FORCED OFF
ON/OFF OPERATION
Input “ON” stops operation (impos-
sible by remote controllers.)
Input OFF
→
ON turns
ON unit.
Input OFF enables control by
remote controller.
Input ON
→
OFF turns
OFF unit.
Indoor unit 1
Indoor unit 2
Max. No. of
indoor units
Crossover wire (P
1
.P
2
)
Remote controller 1
(MAIN)
Remote controller 2
(SUB)
F2
T1
T2
FORCED
OFF
Input A
01_3P130768-1A_En.fm Page 12 Wednesday, March 23, 2005 7:00 PM
