10
English
[4] Use round crimp-style terminals for connecting wires to the
power supply terminal block.
If unavailable, observe the following points when wiring.
•
Do not connect wires of different gauge to the same
power supply terminal.
(Looseness in the connection may cause overheating.)
•
Use the specified electric wire. Connect the wire securely
to the terminal. Lock the wire down without applying
excessive force to the terminal. (Tightening torque:
131N·cm ±10 %)
[5] Tightening torque for the terminal screws.
•
Use the correct screwdriver for tightening the terminal
screws. If the blade of screwdriver is too small, the head
of the screw might be damaged, and the screw will not be
properly tightened.
•
If the terminal screws are tightened too hard, screws
might be damaged.
•
Refer to the table below for the tightening torque of the
terminal screws.
〈〈〈〈
Precautions when connecting the ground
〉〉〉〉
When pulling the ground wire out, wire it so that it comes
through the cut out section of the cup washer.
(An improper ground connection may prevent a good ground
from being achieved.)
10. 3 Remote power supply wiring, transmission wir-
ing, computerised control wire
•
Pass the remote control wiring, the transmission wiring,
and the computerised control wire into the electric
parts box through the through-hole and connect to the
terminals on the X3M terminal block. After connection,
secure with the included cramping material.
(Refer to Fig. 18)
[PRECAUTIONS]
•
Refer to the “Remote Controller Installation Manual” on how
to install and lay the wiring for the remote controller.
•
Do not, under any circumstances, connect the power wiring
to the remote controller or transmission wiring terminal block.
Doing so can destroy the entire system.
•
Connect the remote controller and transmission wiring their
respective terminal blocks.
10. 4 Wiring for the humidity regulator
(locally procured)
〈 〈 〈 〈
VKM-GMV1 series only
〉〉〉〉
•
Pass into the electric parts box together with the power
wire through the power wiring through-hole.
•
Remove the short-circuit wires (1 and 2) on the X1M
terminal block and connect the wiring for the humidity
regulator.
•
Secure with cramping material together with the power
wire.
(Refer to Fig. 17-1)
CAUTION
〈〈〈〈
VKM-GMV1 series only
〉〉〉〉
•
If using humidistat, install one per HRV unit.
Controlling more than one HRV unit with a single humidity
controller may prevent normal humidity operation and cause
water leakage, etc.
10. 5 WIRING EXAMPLE
•
This unit can be used as part of the combined operation sys-
tem used together with indoor units (VRV
II
system air condi-
tioners), or as a independent system for processing outside
air.
•
When connecting with a cooling free building multi type and
bringing the RA (exhaust gas intake) of this unit directly in
from the ceiling, connect to a BS unit identical to the building
multi indoor unit (master unit), and use group-linked opera-
tion. (See the Engineering Data for details.)
Tightening torque (N·m)
Treminal block for remote controller/
Transmission wiring (X3M)
0.79 – 0.97
Power supply terminal block
(X1M)
1.18 – 1.44
Ground terminal
(M4)
1.44 – 1.94
Electric wire
Round crimp-style terminal
Attach insulation sleeve
Round crimp-style terminal
Cup washer
Cut out section
Spring washer, flat washer
Ground screw
Wiring specifications
Sheathed wire (2 wire)
Size
0.75 - 1.25mm
2
Length
MAX. 100m
External contact
specifications
Normally closed contact
(Current tolerance 10mA – 0.5A)
Clamp
Remote controller wiring
Transmission wiring
(accessory)
Detail of terminal block (X3M)
P1 P2 F1 F2 T1 T2
FORCED
OFF
REMOTE
CONTRL
TRANSMISSION
WIRING
Fig. 18
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