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Mitsubishi Electric E Series Data Book page 87

Air cooled chilling unit
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5. Wiring Design
(7) Setting the supplementary heater signal output conditions
A temperature at which the signal output to operate supplementary heaters can be selected.
Supplementary heater signal output conditions
The operation command signal is ON and at least one of the following two conditions is met.
[1] Water-temperature control option (SW2-4) is set to OFF, the inlet water temperature drops below a set water
temperature, and the outdoor temperature drops below a set outdoor temperature.
[2] Water-temperature control option (SW2-4) is set to ON, the external water temperature sensor reading (TH117)
drops below a set water temperature, and the outdoor temperature drops below a set outdoor temperature.
The supplementary heater signal is output from RP1-RP2.
Supplementary heater signal output stop conditions
The operation command signal is OFF or at least one of the following two conditions is met.
[1] The inlet water temperature is at or above a set water temperature +2°C or the outdoor temperature is at or above
a set outdoor temperature +2°C.
[2] External water temperature sensor reading (TH117) is at or above a set water temperature +2°C.
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
1
2
3
4
5
6
ON
2
1
1
2
3
4
5
6
(8) Setting the drain pan heater signal output condition
A temperature at which the signal output to operate drain pan heaters can be selected.
Drain pan heater signal output condition
The following condition is met.
The outdoor temperature drops below a set outdoor temperature.
The drain pan signal is output from KB1-KB2.
Drain pan heater signal output stop condition
The following condition is met.
The outdoor temperature is at or above a set outdoor temperature +2ºC.
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
1
2
3
4
5
6
ON
1
2
3
4
5
6
7
8
9 10
MEES19K040
Setting Item
Supplementary heater operation water temp
7
8
9 10
Supplementary heater operation outdoor temp
7
8
9 10
Setting Item
Drain pan heater operation outdoor temp
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.
Setting
Initial
Unit
Lower
value
Increments
limit
40
0.1ºC
0
ºC
-10
0.1ºC
-30
Setting
Initial
Unit
Lower
value
Increments
limit
0
ºC
1ºC
-40
Setting change from
an optional remote
Upper
controller
limit
(PAR-W31MAA)
55
Not possible
50
Not possible
Setting change from
an optional remote
Upper
controller
limit
(PAR-W31MAA)
20
Not possible
86

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