OPERATING INSTRUCTIONS
CO
2
/NH
3
CASCADE UNIT
250 - 1000 KW
48 _551511_om_kas_gbr_1_.doc
9. Close the oil filter cover of the multi-function
block.
The axial grooved ball bearing ist not adjustable. The
axial play is predetermined by the manufacturer and
cannot be changed.
10. Reopen valves in accordance with item 3. The
valve (080) must be returned to its initial
position.
The axial grooved ball bearing should be subjected
to a visual examination and replaced according to
the oil pump documentation, if required.
11. After the pressure has been equalised, vent oil
filter via the vent valve.
4.6.11 Checking the pull-in torques at fastener of
fixing base
circuit
4.6.8 Changing the filter driers - CO
2
1. Switch off the unit/ cascade.
the pull-in torques at the top 25 Nm
2. Filter driers (6055) should be inspected according
to the normal maintenance schedule. Replace
the filter drier if indicated at sight glass.
the pull-in torques underneath 100 Nm
3. To change the filter drier (6055) close the
following valves in accordance with the P+I
diagram:
4.6.12 Changing the oil fine separation cartridges
The oil fine separation cartridges generally have a
service life of approximately three years.
— (6050) Stop valve before filter drier
If the oil carry over of the unit / cascade increases
severely (oil recharging at unusually short intervals)
the cartridges must be changed:
— (6090) Stop valve behind filter drier
4. Equalise pressure with the atmospheric pressure.
5. Remove the filter drier (6055) and properly
dispose of manner if it is highly soiled.
1. Close the discharge and suction side shut-off
fittings.
6. Carefully mount a new filter drier.
2. Draw off refrigerant and depressurize the unit /
cascade.
7. Reopen valves in accordance with item 3.
3. Check the pressure on the display of the control
or connect a test pressure gauge.
8. After the pressure has been equalised, vent filter
drier via the vent valve (6065).
4. Dismantle the pipe bend on the oil separator.
4.6.9 Clutch maintenance
5. Dismantle the check valve installed in the oil
separator, this step is omitted if a shuttable
check valve is used on the discharge side.
1. Switch off the unit/ cascade.
2. Secure the electric motor against accidentally
being switched on.
6. Remove the securing wire [3].
3. Visually inspect the plate packages.
7. Undo the hexagon screws [2] used to fix the oil
fine separation cartridges.
4. Check the tightening torques of the fitting
screws.
8. Remove the cartridge [1].
5. Check the alignment of the electric motor and if
necessary correct it according to the steel multi-
plate clutch documentation.
9. Install the new cartridge in the reverse order.
Warning!
6. Regrease the clutch (if provided for in the
maintenance instructions for the clutch).
Securing wire [3] must be re-
attached !
4.6.10 Oil pump maintenance (for external oil
pump)
An amount of leakage oil of up to one drop/minute
is required for lubrication of the slide ring seal and
thus permissible.
The slide ring seal is free of maintenance. If the
amount of leakage oil is too large, replace it
according to the Oil Pump Documentation.
To Next Page
Loading...
