MEES20K028
PWFY-P-
N
MU-
E
-BU, P-
NMU-E2-
A
U
46
13. CONTROL
AIR TO WATER
13-2. Indoor unit address setting
(Be sure to operate with the main power turned OFF.)
<Address board>
13-2-1. Switch operation (BC controller)
There are two types of rotary switch setting available: setting addresses 1 to 9 and over 10, and setting branch numbers.
a) How to set addresses
Example: If Address is "3", SWU2 (for over 10) remains at "0", and match SWU1 (for 1 to 9) to "3".
b) How to set branch numbers SWU3 (only for R2/WR2-Series)
Match the indoor unit’s refrigerant pipe with the BC controller’s end connection number. Remain other than R2 at “0”.
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.
13-3. External input/output function
Preset temperature input (external analog input: 4mA-20mA)
External input
Input through CN421, CN422 on the circuit board.
External analog input
Use the supplied connector.
If no temperature settings are made via the MA remote controller, the temperature changes with the current of generator.
Refer to the instructions manual that came with the MA remote controller for how to make the settings.
4 mA
→
50 °F (10 °C) 20 mA
→
160 °F (71 °C)
Note: Use a 4-20mA signal output device with insulation.
External output terminal
External output terminal (refer to [Fig. 1-7-A]) is ineffective when the circuit is open.
Refer to [Table 1] for information about each contact.
The current and voltage in the circuit to be connected to external output terminal (TB141A OUT1) must meet the following
conditions.
SWU2
SWU3
SWU1
CN421
(BK)
(BU)
CN422
3
2
2
1
1
3
CN421
(BK)
(BU)
CN422
3
2
+
2
1
1
3
current
direction
Current generator
External
analog input
+
current
direction
OUT1
OUT2
OUT3
*1
OUT4
Operation ON/OFF
Defrost
Compressor
Error signal
[Fig. 1-7-A]
OUT4
OUT3
OUT2
TB141A
OUT1
[Table 1]
*1 This function is available for
PWFY-P36NMU-E-BU.
0000005923.BOOK 46 ページ 2020年8月6日 木曜日 午後12時38分