Installation manual
10
EWYQ080~250DAYN
Packaged air-cooled water chillers
4PW35559-1D – 03.2011
Setting the password for safety reset
Enter the
SAFETY
submenu through the service menu.
To avoid resetting of safeties by unqualified persons, the user
password is asked by default when resetting a safety.
This password however can be changed to
SERVICE PASSWORD
or to
NONE
.
Setting of compressor running hours
Enter the
COMPRESSOR
submenu through the service menu.
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/analogue inputs and
outputs
Enter the
INPUT OUTPUT
submenu through the service menu.
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:
■
NONE
: no function is appointed to the changeable digital input.
■
STATUS
: no function is appointed to the changeable digital
input, but the input status can be read in the "INPUT OUTPUT"
menu.
■
DUAL SETPOINT
: to switch between setpoints.
■
REMOTE ON/OFF
: to remotely switch the unit on or off.
■
REMOTE COOL/HEAT
: to remotely put the unit in cooling
mode or in heating mode.
■
CAP. LIM 25%
/
50%
/
75%
/
SET
: to limit the capacity of the
unit to the entered values.
■
FREE COOLING REQ
: to remotely put the unit into free
cooling state.
■
FAN FORCED ON
: to activate the fans if the unit is off
Possible functions for the changeable digital output are:
■
NONE (OPEN)
: no function is appointed to the changeable
digital output.
■
CLOSED
: no function is appointed to the changeable digital
output, but the output is closed.
■
2ND PUMP
: can be used to steer a second evaporator pump.
■
100% CAPACITY
: indicates when the unit is working at
100%.
■
FULL CAPACITY
: indicates when the unit is working at
maximum capacity, example reached 100% capacity or reached
maximum capacity because of safety limitation.
■
FREE COOLING
: to control a 3-way water valve when the unit
is working in free cooling state.
■
GEN.OPERATION
: indicates when the unit is switched on.
■
W.(NO)
: indicates that a safety or warning is active
using a normal open contact.
■
W.(NC)
: indicates that a safety or warning is active
using a normal closed contact.
■
SAFETY (NO)
: indicates that a safety is active using a
normal open contact.
■
SAFETY (NC)
: indicates that a safety is active using a
normal closed contact.
■
C1
/
C2 SAFETY
: indicates that a circuit safety is active.
■
WARNING
: indicates that a warning is active.
■
C1
/
C2 OPERATION
: indicates that a compressor of that
circuit is switched on.
■
0% CAPACITY
: indicates that no compressors are switched on.
■
COOLING
: indicates that the cooling mode is active.
■
HEATING
: indicates that the heating mode is active.
■
DEFROST
: indicates that the defrost mode is active.
Possible configurations for the changeable analogue input are:
For each configuration of
CHANG.AI
the type must also be
selected:
■
0-20mA
,
4-20mA
■
0-1V
,
0-5V
,
0-10V
■
NTC TYPE 1
,
NTC TYPE 2
,
NTC TYPE 3
,
NTC
TYPE 4
(Refer to the service manual to know what the
different types of NTC sensors stand for.)
■
DI
(Digital input)
(for how to connect, refer to the wiring diagram)
■
NONE
: no function is appointed to the changeable analogue
input.
■
STATUS
: only displays the status by means of test
■
FLOATING SETP
: floating setpoint based on ambient or
analogue input (only available for
mA
,
V
or
NTC
types)
■
TEMPERATURE
: only displays the (by example) condenser
outlet temperature (only available for
NTC
types)
■
DI
***: refer to the possible functions for changeable digital
inputs. (*** can be any of the following:
STATUS
,
DUAL
SETPOINT
,
REMOTE ON/OFF
,
REM. COOL/HEAT,
FREE COOLING REQ
,
LOW NOISE
or
FAN FORCED
ON
.) (only available for
DI
(digital input) types)
Setting of the probe offset
Enter the
INPUT OUTPUT
submenu through the service menu.
It is possible to enter a correction value for certain measured
temperatures (inlet water evaporator temperature and mixed outlet
water evaporator temperature). This in order to correct a possible
measurement fault. The default value of the probe offset, is equal to 0.
Steering the pump manually
Enter the
PUMP
submenu through the service menu
There is the possibility to turn the pump on or off manually. This
means that when the unit is off the pump can also be turned on at
any time to check the pump.
In case a heater tape is installed
Enter the
PUMP
submenu through the service menu
In case no heater tape is installed, a pump can be activated in low
ambient conditions when the unit is switched off.
NOTE
Since inadequate resetting of safeties can damage the
machine, it is advised to keep the default protection
level setting of the
SAFETY
menu and certainly not to
change it to
NONE
.
NOTE
■
NO
: normal open contact
Possible all changeable digital outputs
-
Safety active = contact closed
-
No power = contact open
-
No safety active = contact open
■
NC
: normal closed contact
Only possible on changeable digital output 1
-
Safety active = contact closed
-
No power = contact closed
-
No safety active = contact open
The default setting is
OFF
. Modify
this setting to
ON
in case the pump
function is required
.
_ PUMPCONTROL
IF UNIT OFF AND LOW
WATER TEMP THEN PUMP
: OFF
