EWAQ+EWYQ009~0 EWAQ+EWYQ009~013ACW1
Packaged air-cooled water chillers and packaged reversible air to
water heatpumps
4PW51588-1
Operation manual
2
O
PERATING
THE
UNIT
O
PERATING
THE
DIGITAL
CONTROLLER
Operating the unit comes down to operating the digital controller.
Features and functions
The digital controller is a state of the art controller that offers full
control over your installation. It can control a cooling/heating and a
cooling only installation.
Both installations are available in multiple versions which vary in
capacity.
Basic controller functions
The basic controller functions are:
■
Turning the unit ON/OFF.
■
Operation mode change-over:
-
heating (refer to
-
cooling (refer to
-
quiet mode (refer to
■
Selection of features:
-
quiet mode (refer to
-
weather dependent control (refer to
dependent set point operation (heat pump models only)" on
page 4
■
Temperature set point adjustment (refer to
The digital controller supports a power cut off of maximum 2 hours.
When autorestart is enabled (see
allows a power supply shut down of 2 hours without user intervention
(e.g. benefit kWh rate power supply).
Clock function
The clock functions are:
■
24 hour real time clock.
■
Day of the week indicator.
Schedule timer function
The schedule timer function allows the user to schedule the
operation of the installation according to a daily or a weekly program.
Name and function of buttons and icons
1.
COOLING/HEATING ON/OFF BUTTON
y
The ON/OFF button starts or stops the heating or cooling
function of the unit.
When the unit is connected with an external room thermostat,
this button is not operable and the icon
e
is shown.
Pressing the ON/OFF button consecutively too many times may
cause malfunction of the system (maximum 20 times per hour).
2.
OPERATION LED
0
The operation LED is lit during cooling or heating operation. The
LED blinks if a malfunction occurs. When the LED is OFF,
cooling or heating are inactive.
3.
OPERATION MODE ICONS
hcs
These icons indicate the current operation mode(s): heating (
h
),
cooling (
c
) or quiet mode (
s
). Quiet mode is a feature of the
cooling or heating operation mode. When quiet mode is
activated, the quiet mode icon and the heating or cooling mode
icon will be displayed simultaneously.
In a heating only installation, the
c
icon will never be displayed.
In a cooling only installation, the
h
icon will never be displayed.
4.
EXTERNAL CONTROL ICON
e
This icon indicates that an external room thermostat with higher
priority is controlling your installation. This external room
thermostat can start and stop the heating/cooling operation and
change the operation mode (cooling/heating).
When an external room thermostat with a higher priority is
connected, the schedule timer for cooling and heating will not
function.
5.
DAY OF THE WEEK INDICATOR
1234567
This indicator shows the current weekday.
When reading or programming the schedule timer, the indicator
shows the set day.
6.
CLOCK DISPLAY
8
The clock display shows the current time.
When reading or programming the schedule timer, the clock
display shows the action time.
7.
SCHEDULE TIMER ICON
p
This icon indicates that the schedule timer is enabled.
8.
ACTION ICONS
q
These icons indicate the programming actions for each day of
the schedule timer.
9.
OFF ICON
x
This icon indicates that the OFF action is selected when
programming the schedule timer.
Never let the digital controller get wet. This may cause an
electric shock or fire.
Never press the buttons of the digital controller with a hard,
pointed object. This may damage the digital controller.
Never inspect or service the digital controller yourself, ask
a qualified service person to do this.
NOTE
■
Descriptions in this manual that apply to a specific
installation or that depend on the installed
equipment, are marked with an asterisk (*).
■
Some functions described in this manual may not
be available or should not be available. Ask your
installer or your local dealer for more information
on permission levels.
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26
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14
4
7
9
12
10
22
34
27
28
23
20
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31
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30
2
16
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Summary of Contents for EWAQ009ACV3
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