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9.3. Connecting electrical connections
Verify that the model name on the operating instructions on the cover of the
control box is the same as the model name on the nameplate.
1. Remove the 2 screws holding the terminal box cover in place.
[Fig. 9.3.1] (P. 4)
A Screw holding cover (2 pcs)
Note:
Ensure that the wiring is not pinched when fitting the terminal box cover.
Pinching the wiring may cut it.
Caution:
Install wiring so that it is not tight and under tension. Wiring under tension
may break, or overheat and burn.
2. Open knockout holes
(Recommend to use a screwdriver or the like for this work.)
[Fig. 9.3.2] (P.4)
A Control box
C Remove
3. Fix power source wiring to control box by using conduit for tensile force. (PG
connection or the like.) Connect transmission wiring to transmission terminal
block through the knockout hole of control box using ordinary bushing.
4. Connect the power source, Earth, transmission and remote controller wiring.
9.5. Selecting the static pressure
Five levels of external static pressure 0.2 in.WG/0.4 in.WG/0.6 in.WG/0.8 in.WG/1.0 in.WG (50Pa/100Pa/150Pa/200Pa/250Pa) are available for selection.
Set the setting either by using the switches on the control board (SWA and SWC) or from the function selection screen on the remote controller.
Notes:
•
When the static pressure setting was set from the remote controller, the actual setting and the switch setting on the control board may not match because the
latest setting from the remote controller overrides the previous setting. To check the latest static pressure setting, check it on the remote controller, not on
the switch.
•
If the static pressure setting for the duct is lower than that for the unit, the fan of the unit may repeat start/stop, and the static pressure setting may
automatically be lowered. Check the static pressure setting, and then match the static pressure setting for the unit to that for the duct. When the static
pressure setting is lowered, reset the power supply of the system or change the static pressure setting, and then the static pressure setting that has been
automatically lowered will be reset.
s s s s s To set the external static pressure with the switches on the control board
External static pressure
0.2 in.WG (50Pa)
0.4 in.WG (100Pa)
0.6 in.WG (150Pa)
0.8 in.WG (200Pa)
1.0 in.WG (250Pa)
s s s s s To set the external static pressure from the function selection screen on the remote controller (Only PAR-30MAA)
Follow the instructions below and the instructions detailed in the remote controller manual for how to set the switches.
1. Set the function setting No. 32 (Switch setting/Function selection) to "2".
2. Set the function setting No. 8 and No. 10 to appropriate values, according to the external static pressure.
Function
setting No.
Selection
No. 32
Switch setting
1
Function selection
2
B Cover
B Knockout hole
SWA
SWC
Set the switches on the control board (SWA and SWC) as shown in the table at left.
3
2
1
2
3
2
1
1
3
2
1
3
2
2
1
3
1
2
1
External static
Initial
Current
pressure setting
setting
setting
0.2 in.WG (50Pa)
0.4 in.WG (100Pa)
0.6 in.WG (150Pa)
0.8 in.WG (200Pa)
1.0 in.WG (250Pa)
[Fig. 9.3.3] (P.4)
A Use conduit to keep the weight of the cable and external force from being applied
to the power supply terminal connector. Use a cable tie to secure the cable.
Wind the wire around the cable strap once to keep it from being pulled out.
B Conduit
D Tensile force
F Power source terminal bed
H Terminal bed for remote controller
J Transmission line to the M-NET Remote controller
K Transmission line to the MA Remote controller
5. After wiring is complete, make sure again that there is no slack on the connec-
tions, and attach the cover onto the control box in the reverse order removal.
Notes:
•
Do not pinch the cables or wires when attaching the terminal bed box
cover. Doing so may cause a risk of disconnection.
•
When accommodating the terminal bed box, make sure that the connec-
tors on the box side are not removed. If removed, it cannot operate nor-
mally.
Caution:
Wire the power supply so that no tension is imparted. Otherwise disconnec-
tion, heating or fire result.
9.4. External I/O specifications
Caution:
1. Wiring should be covered by insulation tube with supplementary insula-
tion.
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.
Function setting No.
Initial
Current
setting
setting
No. 8
No. 10
1
1
2
1
3
1
2
2
3
2
C Power source wiring
E Use ordinary bushing
G Terminal bed for indoor transmission
I To 1-phase power source
[Important]
Be sure to write down the settings for
all functions in the "Current setting" row
if any of the initial settings has been
changed.
11
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