SiENBE28-901
Field Settings
Air Cooled Refrigeration Condensing Unit
39
3.1.1 Evaporation temperature correction at night-time, using an external
contact
The two methods can be used to increase the evaporation temperature at night-time below:
1. Receiving the time setting from the AIRNET (Setting Mode 2-8·9).
2. Using an external contact.
The following describes the wiring needed to use an external contact.
By a short-circuit between terminals A and C on the PCB (A5P) in the control box, the
evaporation temperature can be corrected at night-time.
For details about the wiring, refer to Figure 1. Protect the terminals using insulation sleeves
or equivalent.
When used in conjunction with a remote switch, connect the wire to the terminal using a ring
connector (refer to Figure 2), or connect it to terminal C (refer to Figure 3). The terminal
connectors must be protected with insulation sleeves.
By using the Setting Mode 2-8·9, you can change the amount of evaporation temperature shift
that is allowed during the night-time evaporation temperature correction.
The shift amount is factory set to 1°C.
Moreover, the signal from the external contact will take precedence over the setting specified in
Setting Mode 2-8·9.
Electric wire thickness
0.75 - 1.25 mm
2
Wiring length
Max. 100 m
Contact rating
Minimum applied load
12 VDC, 1 mA or less
Contact for an evaporation temperature correction at night-time:
Contact ON: Enabled.
Contact OFF: Disabled.
X3M
1
2
A B C
A5P
<Figure 1>
Closed-end connector
To remote switch
<Figure 2>
<Figure 3>
X3M
1
2
A5P
A B C
X3M
1
2
A5P
A B C
To remote switch
