Installation manual
7
EWAP400~540MBYNN
Packaged air-cooled water chillers
4PW22678-1B
C
USTOMIZATION
IN
THE
SERVICE
MENU
To change a setting in the service menu:
1
Enter the usersettings menu as indicated in the operation
manual and press the
h
key to go to the last screen to enter the
service menu (this is only possible if the unit is off).
2
Enter the correct password using the
h
and
g
keys. The
password can be found in the service manual.
3
Press
q
to confirm the password and enter the service menu.
4
Go to the screen which contains the parameter to be modified by
using the
h
and
g
keys.
5
Position the cursor behind the parameter to be modified using
the
q
key.
6
Select the appropriate setting using the
h
and
g
keys.
7
Press
q
to confirm the modification. When the modification has
been confirmed, the cursor switches to the next parameter
which can now be configured.
8
Place the cursor in the top left corner of the screen when you
are finished changing the parameters on this screen.
9
Repeat from instruction 4 onwards to modify other parameters.
Setting of the minimum outlet water temperature
It is possible to change the minimum outlet water temperature
(
) in the service menu. Before lowering the minimum
outlet water temperature:
■
Make sure that sufficient glycol is added to the water system
according to the table.
■
Make sure that the low pressure safety is lowered according to
the table.
Defining a unit in a setup of a DICN system
Change the setting of
to
on each unit.
Setting the password for safety reset
To avoid resetting of safeties by unqualified persons, the user
password is asked by default when resetting a sefety.
This password however can be changed to
or to
.
Setting of compressor running hours
When the displayed running hours do not comply with the actual
running hours of the compressor it is possible to change the running
hours to comply.
Defining of the changeable digital/analog inputs and outputs
Besides locked inputs and outputs there are a number of changeable
inputs and outputs of which the function can be chosen from several
possibilities.
Possible functions for changeable digital inputs are:
■
: no function is appointed to the changeable digital input.
■
: no function is appointed to the changeable digital input,
but the input status can be read in the "input/output" menu.
■
: to switch between setpoints.
■
: to remotely switch the unit on or off.
■
: to limit the capacity of the unit to the
entered values.
Possible functions for the changeable digital output are:
■
: no function is appointed to the changeable digital
output.
■
: no function is appointed to the changeable digital
output, but the output is closed.
■
: can be used to steer a second evaporator
pump.
■
: indicates when the unit is working at 100%.
■
: to control a 3-way water valve when the unit is
working in free cooling state.
Possible configurations for the changeable analog input are:
■
: no function is appointed to the changeable analog input.
■
:
■
:
■
:
■
:
This allows the user to define a setpoint in function of an analog input
as mentioned above. Refer to
"Defining the setpoint signal setting" on
.
■
: to control the leaving water temperature of
a DICN system.
Defining the setpoint signal setting
The setpoint signal is used to change the setpoint by an external
analog input signal on a stand alone unit or on Slave 1 in a DICN
system.
Example
All customized settings must be done by a licensed
technician.
minimum outlet water (
)
2°C
0°C
–5°C
–10°C
Weight of ethylene glycol
(%)
10
20
30
40
Weight of propylene glycol (%)
15
25
35
40
Low pressure setting
(bar)
1.3
1.1
0.6
0.2
Improper setting of the minimum outlet water temperature
can result in severe damage of the equipment.
NOTE
Since inadequate resetting of safeties can damage the
machine, it is advised to keep the default setting of
.
in setpoints menu
➞
in service menu
➞
➞
Remark:
!
is only
available when input
(
,
,
or
) is selected.
Result
Display in readout menu
A
at 0 V
➝
12.0°C
" #
B
at 1 V
➝
12.0°C + 5.0°C = 17.0°C
" $#
% " #
" #
" $#
" $#
&' (
""
! " )#
B
1 V
A
0 V