EWWQ090G ÷ EWWQ720L - R410A - Water-cooled scroll chillers
EWLQ090G ÷ EWLQ720L - R410A - Condenser less
EWHQ100G ÷ EWHQ400G - R410A - Heat pump scroll chillers
EWAQ-G 075
- R410A - Air-cooled scroll chillers
EWAQ-
- R410A - Air-cooled scroll chillers
EWYQ-
- R410A - Air-cooled scroll heat pumps
Air and Water cooled scroll chillers & heat pump
Operation
Manual
Operation Manual
32
EWWQ - EWLQ - EWHQ
EWAQ - EWYQ
Air or Water cooled scroll chiller &
heat pump
D-EOMHW00107-15EN
4.2.5.5 Timers
In this menu are reported the countdowns for startup and shutdown of a new chiller
Setpoint/Sub-Menu
Default
Range
Description
Stage Up Timer=
-
-
Current delay for new chiller stage up
Stage Dn Timer=
-
-
Current delay for new chiller stage down
4.2.6 Date/Time
This page will allow to adjust the time and date in the UC. This time and date will be used in the
alarm log. Additionally it’s also possible to set the starting and ending date for the DayLight Saving
time (DLS) if used.
Setpoint/Sub-Menu
Default
Range
Description
Actual Time=
12:00:00
Actual Date=
01/01/2014
UTC Diff=
-60min
Difference with UTC
DLS Enable=
Yes
No, Yes
DLS Strt Month=
Mar
DayLight Saving time start month
DLS Strt Week=
2ndWeek
DayLight Saving time start week
DLS End Month=
Nov
NA, Jan…Dec
DayLight Saving time end month
DLS End Week=
1stWeek
1
st
…5
th
week
DayLight Saving time end week
On board real time clock settings are maintained thanks to a battery mounted on the controller.
Make sure that the battery is replaced regularly each 2 years (see section 3.6).
4.2.7 Power Conservation
This page resumes all the settings that allows chiller capacity limitations. For more details about
these parameters and the functions LWT Reset and Demand Limit refer to section 5.1.7.
Setpoint/Sub-Menu
Default
Range
Description
Unit Capacity
-
-
Displays current unit capacity
Demand Limit=
-
-
Displays current demand limit
Lwt reset Type=
None
None
4-20mA
Return
OAT (A/C only)
Set leaving water temperature setpoint reset type
Refer to section
Max Reset Dt=
5°C
0.0…10.0°C
Refer to section
Start Reset Dt=
5°C
0.0…10.0°C
Refer to section
Cooling
Max Reset OAT=
23.8°C
10.0…29.4°C
Refer to section (A/C only)
Start Reset OAT=
15.5°C
10.0…29.4°C
Refer to section (A/C only)
Heating
Max Reset OAT=
0.0°C
10.0…-10.0°C
Refer to section (A/C-H/P only)
Start Reset OAT=
6.0°C
10.0…-10.0°C
Refer to section (A/C-H/P only)
4.2.8 Controller IP setup
The UC has an embedded web server showing a replica of the onboard HMI screens. To access
this additional web HMI can be required to adjust the IP settings to match the settings of the local
network. This can be done in this page. Please contact your IT department for further information
on how to set the following setpoints.
To activate the new settings a reboot of the controller is required, this can be done with the
“Apply
Changes
” setpoint.
The controller also supports DHCP, in this case the name of the controller must be used.
