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Mitsubishi Electric E Series Data Book page 84

Air cooled chilling unit
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5. Wiring Design
(5) Setting the water temperature using analog signal input
When dip switch SW2-7 is set to ON (Enable external input), SW2-8 is set to OFF and SW2-9 is set to OFF, the target
water temperature varies with the preset temperatures A and B and the type of analog input signal.
Set the dip switches on the circuit board as follows to make the settings for the items described in this section.
Press the push switch SWP3 to enable the configuration changes.
Press the push switches SWP1 (↑) or SWP2 (↓) to increase or decrease the value.
When the desired value is displayed, press SWP3 to save the setting value.
Settings table
Rotary
No.
Dip switch setting (SW1)
switch
(SWU3)
ON
1
1
2
3
4
5
6
1
ON
2
1
1
2
3
4
5
6
ON
3
1
1
2
3
4
5
6
ON
4
1
1
2
3
4
5
6
* Due to the resistance of the wire that is connected to the analog input, the preset temperature may not properly be sent. If this is
the case, check the current value of the analog input, and adjust the output value of the connected signal output device.
Refer to the table below for how to display the value of the analog input.
Rotary
No.
Dip switch setting (SW1)
switch
(SWU3)
ON
1
0
1
2
3
4
5
6
ON
2
0
1
2
3
4
5
6
ON
3
0
1
2
3
4
5
6
ON
1
2
3
4
5
6
7
8
9 10
 When the water temperature setting input signal type is 4-20 mA
• External analog input signal of 6 mA: Preset temp. A
• External analog input signal of 18 mA: Preset temp. B
• External analog input signal of between 6 and 18 mA: the preset temperature will be linearly interpolated.
Preset temp B
Preset temp A
MEES19K040
Setting Item
Preset temp. A (Cooling)
7
8
9 10
Preset temp. B (Cooling)
7
8
9 10
Preset temp. A (Heating)
7
8
9 10
Preset temp. B (Heating)
7
8
9 10
Monitorable items
Current value (4-20 mA)
7
8
9 10
5V voltage value (1-5 V)
7
8
9 10
10V voltage value (0-10 V or 2-10 V)
7
8
9 10
The figure at left shows that the switches 1 through 5 are set to ON and 6 through 10 are set to OFF.
4 mA 6 mA
18 mA 20 mA Input current
Setting
Initial value
Unit
Increments Lower limit Upper limit
5
°C
1ºC
30
°C
1ºC
30
°C
1ºC
55
°C
1ºC
Unit
mA
V
V
Setting change from
an optional remote
controller
(PAR-W31MAA)
5
30
Not possible
5
30
Not possible
30
55
Not possible
30
55
Not possible
83

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