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7.4. Connecting electrical connections
Please identify the model name of the operation manual attached on the terminal
box cover with that shown on the rating name plate.
1. Remove the screws holding the cover to dismount the cover.
[Fig. 7.4.1] (P.9)
A Screw holding cover (4pcs.)
2. Open knockout holes
(Recommend to use a screwdriver or the like for this work.)
3. Fix power source wiring to terminal box by using buffer bushing for tensile
force. (PG connection or the like.) Connect transmission wiring to transmission
terminal block through the knockout hole of terminal box using ordinary bush-
ing.
4. Connect the power source, Earth, transmission and remote controller wiring.
The dismounting of the terminal box is not needed.
[Fig. 7.4.2] (P.9)
A Terminal bed box
C Remove
[Shield wire connection]
[Fig. 7.4.3] (P.9)
A Use a cable tie to secure the cable.
B Use PG bushing to keep the weight of the cable and external force from being applied
to the power supply terminal connector.
C Power source wiring
E Power source terminal block
G Terminal block for remote controller
I Transmission line 30 VDC
J Transmission line to the remote controller, terminal block for indoor unit and BC con-
troller
5. After wiring is complete, make sure again that there is no slack on the connec-
tions, and attach the cover onto the terminal box in the reverse order of
removal.
Notes:
•
Do not pinch the cables or wires when attaching the terminal box cover.
Doing so may cause a risk of disconnection.
•
When accommodating the terminal box, make sure that the connectors on
the box side are not removed. If removed, it cannot operate normally.
7.5. Optional VALVE KIT electrical construction work
1. Remove the screw (4pcs) holding the cover to dismount the cover.
[Fig. 7.4.1] (P.9)
A Screw holding cover (4pcs)
B Cover
2. Insert the lead wire of the optional VALVE KIT into the indoor unit through the wir-
ing insertion port.
[Fig. 7.5.1] (P.9)
C Optional VALVE KIT lead wire
D Cable clamp
3. Connect to the optional lead wire circuit board connector.
•
A connector is attached to CN8A, so remove it.
•
The connection destinations of the lead wire connector of the optional VALVE
KIT are as follows.
[Fig. 7.5.2] (P.9)
Flow control valve (8pin white): CN8A
Pressure sensor-IN (6pin white): CNSA
Pressure sensor-OUT (3pin black): CNSB
7.10. Electrical characteristics
Model
PFFY-WL20VEM-A
PFFY-WL25VEM-A
PFFY-WL32VEM-A
PFFY-WL40VEM-A
PFFY-WL50VEM-A
Refer to Data Book for other models.
B Cover
B Knockout hole
D Use ordinary bushing
F Terminal block for indoor transmission
H To 1-phase power source
Power supply
Volts / Hz
Range +-10%
220-240 V / 50 Hz
Max.: 264 V
220-240 V / 60 Hz
Min.: 198 V
4. Install a band on the optional lead wire, and perform measures against tension.
[Fig. 7.5.3] (P.9)
C Optional VALVE KIT lead wire
D Cable clamp
E Small band (included with the optional VALVE KIT)
5. Attach the electrical box cover as it was.
7.6. External I/O specifications
Caution:
1. Wiring should be covered by insulation tube with supplementary insulation.
2. Use relays or switches with IEC or equivalent standard.
3. The electric strength between accessible parts and control circuit should
have 2750 V or more.
7.7. Setting addresses
(Be sure to operate with the main power turned OFF.)
[Fig. 7.7.1] (P.10)
<Indoor controller board>
•
There are two types of rotary switch setting available: setting addresses 1 to 9
and over 10, and setting branch numbers.
1 How to set addresses
Example: If Address is "3", remain SW12 (for over 10) at "0", and match SW11 (for 1 to 9)
with "3".
2 How to set branch numbers SW14 (Series R2 only)
The branch number assigned to each indoor unit is the port number of the BC controller
to which the indoor unit is connected.
Leave it to "0" on the non-R2 series of units.
•
The rotary switches are all set to "0" when shipped from the factory. These
switches can be used to set unit addresses and branch numbers at will.
•
The determination of indoor unit addresses varies with the system at site. Set
them referring to the Data Book.
7.8. Sensing room temperature with the built-in sen-
sor in a remote controller
If you want to sense room temperature with the built-in sensor in a remote controller,
set SW1-1 on the control board to "ON". The setting of SW1-7 and SW1-8 as nec-
essary also makes it possible to adjust the air flow at a time when the heating ther-
mometer is OFF.
Note:
To perform the auto cooling/heating operation, use the built-in sensor in a re-
mote controller or the optional remote sensor.
7.9. Setting of intermittent fan control
When the unit is used in a high temperature and humidity environment, set the func-
tion setting No. 119 to "2."
(Default setting: "1")
Caution:
When the setting is enabled, the stopped fan may start operating.
Symbols: MCA: Max. Circuit Amps (= 1.25 x FLA) FLA: Full Load Amps
IFM: Indoor Fan Motor
MCA (A)
Output (kW)
0.42
0.54
0.62
0.65
0.85
Output: Fan motor rated output
IFM
FLA(A)
0.096
0.33
0.096
0.43
0.096
0.49
0.096
0.52
0.096
0.68
19
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