D-EOMHP01501-22_00EN 9/29
[17.6.4] Time 3
W
1
[17.6.5] Value 3
W
1
[17.6.6] Time 4
W
1
[17.6.7] Value 4
W
1
The path in the Web HMI interface is “
Main Menu
→
View/Set Unit
→
Scheduler
”.
The user can indicate four time slots for each day of the week and set one of the following modes for each of them:
Parameter
Range
Description
Value
[17.x.x]
0 = Off
Unit disabled
1 = On 1
Unit enabled
– Water primary setpoint selected
2 = On 2
Unit enabled
– Water secondary setpoint selected
The Time slots can be set from
in “Hour:Minute”:
Parameter
Range
Description
Time
[17.x.x]
“00:00-24:60”
Time of the day can vary from 00:00 to 23:59.
If Hour = 24
the HMI will display “An:Minute” as string and the Value# related to Time# is set for all hours
of the associated day.
If Minute = 60
the HMI will display “Hour:An” as string and the Value# related to Time# is set for all
minutes of the selected hours of the day.
3.3.3. Network On/Off
Chiller On/Off can be managed also with BACnet or Modbus RTU communication protocol.
To control the unit over the network, follow below instructions:
1. Unit On/Off switch = closed
2. Unit Enable = Enable (refer to
3. Control Source = 1 (refer to
The HMI menu is:
Menu
Parameter
Range
R/W
04
00
(
Control Source
)
Off
= Local
W
On
= Network
W
Modbus RTU is available as default protocol on RS485 port. The HMI page [22] is used to change between Modbus and BACnet
protocol and set parameters for both MSTP and TCP-IP communication, as shown in chapter 3.22.
The path in the Web HMI
interface for Network Control Source is “
Main Menu View/Set
→
Unit
→
Network Control
”.
3.3.4. Unit On/Off Switch
For unit start up is mandatory to close the electrical contact between terminals:
XD-703
→
UC-D1 (UNIT ON/OFF SWITCH).
This short circuit can be realized through:
•
External electrical switch
•
Cable
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