M0G140F7-01 06/11/07
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25
MAINTENANCE
This way, the plant can be kept within the operating limits even when the unit is OFF
or on STANDBY, for example during the weekend or the nighttime.
Periodically the system activates the circulation pump, measures the water
temperature and activates the compressor, if required, to take the water temperature
to the set-point level.
•
Summer maintenance set-point par 42
AL
AR
M
ST
AT
US
SE
T
STB
This function is activated by parameters 44 (activate summer maintenance level) and 45 (activate winter maintenance level).
With unit in maintenance mode, the display visualizes
STB
.
FUNCTIONING WITH ETHYLENE GLYCOL
The units foreseen to function with glycoled water come out from the premise with standard parameters.
After having added glycol ethylene to water, the technician will properly set the plant.
Parameter to modify:
32
Summer set point
77 Antifreeze
resistanceset
80 Antifreeze
alarm
84
Antifreeze pre-alarm threshold
KEYPAD
Menu and “historical log “of
alarms flashes during an alarm
VALUE display
Led signalling the necessity to
multiply by 100 the value
Opened active defrost
Opened active compressor
INDEX display.
COOLING
open in COOL
HEATING open in HEAT
STATUS menu
Opened ACTIV PUMP
Increases decreases the VALUE
ON –OFF
Index scrolling
PARAMETER MODIFY
1
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AR
M
STA
TU
S
SE
T
OFF
unit in OFF.
by keypad
by supervisor
2
AL
AR
M
ST
AT
US
SET
switching: long ON -
OFF
pressure
3
AL
AR
M
ST
AT
US
SE
T
11.6
SUPPLY temperature
visualization
AL
AR
M
STATU
S
SE
T
