3-3
Z MED Medical Air System
4107 9022 67.00
3.0 System Operation
The oil injection temperature must be set
at 20°C + 2°C (38°F + 3.6°F) above water
inlet temperature.
10.
Intercooler on “ZR” compressors:
Read-
out following parameters in the Elektronikon
at stabilized load condition:
• Water inlet temperature (“Cooling Water In”)
• High-pressure element inlet temperature
(“Element 2 Inlet”)
Calculate DtIC = “Element 2 Inlet” – “Cool-
ing Water In”
If DtIC > 25°C (54°F), open ball valve (3) to
decrease the temperature difference and
increase the intercooler cooling.
If DtIC < 15°C (27°F), close ball valve (3) to
increase the temperature difference and
decrease the intercooler cooling.
The high pressure element inlet temperature
must be set around 20°C (36°F) above the
cooling water inlet temperature.
11.
Aftercooler on “ZR” Compressors:
Read-
out following parameters in the Elektronikon
at stabilized load condition:
• Water inlet temperature (“Cooling Water In”)
• Compressor outlet temperature (“Compres-
sor Outlet”)
Calculate DtAC = “Compressor Outlet” –
“Cooling Water In”
If DtAC > 9°C (16.2°F), open ball valve (2) to
decrease the temperature difference and
increase the aftercooler cooling.
If DtIC < 5°C (9°F), close ball valve (2) to in-
crease the temperature difference and de
-
crease the aftercooler cooling.
The aftercooler outlet temperature must
be set at 6-8°C (10.8-14.4°F) above the
cooling water inlet temperature.
12.
On “All” compressors:
Run the compressor
for a few minutes and check that it operates
normally.
tation while the motor is coasting to a stop.
The arrow on the gear casing indicates the
correct rotation direction. If the rotation di-
rection is wrong, switch off the voltage and
reverse two incoming electric lines.
On ZT
,
check the rotation direction of the fan motor.
Cooling air must be blown through the outlet
grating on the roof. If the rotation direction
is wrong, switch off voltage and reverse two
connections at the terminals of circuit break-
er (Q15).
9.
Oil Cooler on “ZR” compressors:
Read-out
following parameters in the Elektronikon at
stabilized load condition:
• Water inlet temperature (“Cooling Water In”
• Oil injection temperature (“Oil Injection”)
Calculate DtOC = “Oil Injection” – “Cooling
Water In”
If DtOC > 20°C (36°F), open ball valve (1) to
decrease the oil injection temperature.
If DtOC < 20°C (36°F), close ball valve (1) to
increase the oil injection temperature.
FIG 3.2.1c Coolers and Water Valves (ZR)
Components
1
Water flow regulating valve, oil cooler
2
Water flow regulating valve, aftercooler
3
Water flow regulating valve, intercooler
Co
Oil cooler
Ca Aftercooler
Ci Intercooler
