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External I/O Specifications; Setting Switches; Setting Addresses; Setting Unit Capacity - Mitsubishi Electric PAC-AH125 Installation Manual

Air handling unit controller
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Defrost
D31
signal
D32
A defrost signal is output in defrosting. Be careful to miscarriage lines
because over AC200 V is impressed in ON.
Notes:
After connecting each wire to the terminal, tighten each nut tightly
through which the wire runs.
Check that the bunch of wires do not come off even if they are pulled
strongly.
Caution:
After the wiring work is completed, mount the inner cover first and then
the outer cover.
Tighten the screws tightly. (If not, drop of water may enter, leading to
malfunction.)
Operation signal cables and Error signal cables and Operation com-
mand cables must be routed in a distance of at least 20 cm from all
other cables.
When Operation signal, Error signal and Distant signal are taken out,
remove the plug inside the bunch of wires.
Wind the supplied tube around the wire according to the size and num-
ber of the wire.
If the wire comes off the tightly tightened bunch of wires, wind the insu-
lation tape around the wire to make the wire thicker.

8. Setting switches

8.1. Setting addresses

(Be sure to operate with the main power turned OFF.)
[Fig. 8.1.1] (P.5)
A Address switch
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 technical data.
12
X: Relay (field supply)
AC220~240 V 1 A
X
B SW2

7.5. 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.

8.2. Setting unit capacity

Set the unit capacity according to the heat exchanger type (field supply).
Set the dip switch (SW2 and SW3-2) on the control board in accordance with the
chart below.
Unit capacity
Allowed heat
Type
(Air handling
exchanger capacity
unit)
Cooling (heating)
9.0 ~ 11.2 kW
P100
ON
(10.0 ~ 12.5 kW)
OFF
AH125
11.2 ~ 14.0 kW
P125
ON
(12.5 ~ 16.0 kW)
OFF
14.0 ~ 16.0 kW
AH140
P140
ON
(16.0 ~ 18.0 kW)
OFF
16.0 ~ 22.4 kW
P200
ON
(18.0 ~ 25.0 kW)
OFF
AH250
22.4 ~ 28.0 kW
P250
ON
(25.0 ~ 31.5 kW)
OFF
36.0 ~ 45.0 kW
P400
ON
(40.0 ~ 50.0 kW)
OFF
AH500
45.0 ~ 56.0 kW
P500
ON
(50.0 ~ 63.0 kW)
OFF
*
indicates ON/OFF state.
Setting switches
SW2*
SW3-2*
1 2 3 4 5 6
1 2 3 4 5 6 7 8 9 10
ON
OFF
1 2 3 4 5 6
1 2 3 4 5 6 7 8 9 10
ON
OFF
1 2 3 4 5 6
1 2 3 4 5 6 7 8 9 10
ON
OFF
1 2 3 4 5 6
1 2 3 4 5 6 7 8 9 10
ON
OFF
1 2 3 4 5 6
1 2 3 4 5 6 7 8 9 10
ON
OFF
1 2 3 4 5 6
1 2 3 4 5 6 7 8 9 10
ON
OFF
1 2 3 4 5 6
1 2 3 4 5 6 7 8 9 10
ON
OFF

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