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2.7 - Function test
2.7.1 - Calibrating hot water control valves
Fig. 8 - Display example
Generator temperature
Press the "SEt" and "
2 seconds.
Press the "
Press the "
Press the "SEt" key for about 2 seconds.
Press the "
Press the "SEt" key.
Press the "
Press the "SEt" key for about 2 seconds.
Set the "
Press the "SEt" key.
Press the "bACK" key twice.
Generator temperature
Check that the hot water control valve closes.
2.7.2 - Water alarm
Chilled-water temperature (setpoint: 2.5°C)
a.
Provide 1-2 litres of ice water.
b.
Press the "RUN" key on the control board.
c.
Dip the chilled-water temperature sensor (DT1) removed
from the sensor holder into the water.
d.
Confirm that the data display on the control board shows
J-01 "Chilled water temperature alarm".
Chilled-water flow rate
(setpoint: less than approximately 50% of rated flow)
a.
Press the "RUN" key
b.
Reduce the chilled-water flow rate by gradually closing
the evaporator outlet side valve.
c.
Confirm that the data display on the control board shows
J-03 "Chilled water flow rate alarm".
Cooling water temperature
(setpoint 19°C for 30 minutes during operation)
a.
Dip the cooling water inlet temperature sensor into the
water.
b.
Press the "RUN" key
c.
After about 30 minutes confirm that the data display on
the control board shows J-20 "Cooling water temperature
alarm".
"keys simultaneously for about
SEt" key for about 2 seconds.
SEt" key 3 times.
" or "
" key.
" key once.
" key to 0.
2.7.3 - Motor alarm
After starting the chiller press the test levers of each thermal
relay.
Refrigerant pump
The data display shows J-10 "Refrigerant pump alarm".
Absorbent pump
The data display shows J-04 "Absorbent pump alarm".
2.7.4 - System alarm
Chilled water pump
a.
Press the "RUN" key.
b.
Stop the chilled-water pump.
c.
Confirm that the data display on the control board shows
J-02 "Chilled-water pump interlock alarm" and the cooling
water pump stops immediately.
Cooling water pump
a.
Press the "RUN" key.
b.
Stop the cooling water pump.
c.
Confirm that the data display on the control board shows
J-06 "Cooling water pump interlock alarm".
2.7.5 - Hot-water control valve operation
Fig. 9 - Display example
Generator temperature
Press the "SEt" and "
for about 2 seconds.
Press the "SEt" key for about 2 seconds.
Press the "
Press the "SEt" key for about 2 seconds.
Press the "
Press the "SEt" key for about 2 seconds.
Press the "bACK" key twice.
Generator temperature
"keys simultaneously
" key 3 times.
" or "
" key.
1
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