August 20, 2018
33
Notes on the table:
Ultimately the type of cable you use, its length and
installation conditions (temperature, accumulation) are
outside the scope of our knowledge. Therefore the
above table only offers guidelines.
The gauges named in the table correspond to those in
UL508A. (Rubber sheathed cable at 86 °F and max.
55 yd cable length)
* If conditions differ (cable length, temperature and
accumulation) the gauge must be determined according
to UL508A. The cable type must also be taken into
consideration.
7.4.1 Check setting of the fan protection
switch (only for L55RS-L75RS)
Check the setting of the motor protection switch in
accordance with the enclosed circuit diagram for the
compressor.
Set the protection switch to the value stated in the table
corresponding to the mains voltage and frequency (see
circuit diagram).
7.4.2 Checking the setting of the control-
power transformer
DANGER
High Voltage – Hazard of Shock, Burn, or
Death.
3.
·
The electrical connection should be
made by a qualified electrician.
4.
·
Only perform checks and carry out work
on the screw compressor when the unit
is out of operation, depressurized, and
secured from being switched on again!
NOTICE
Incorrectly setting the control transformer poses
a risk to the trouble-free operating of the
system.
Checking the setting of the control transformer
is part of commissioning and part of regular
inspection/maintenance because the supply
voltage can change.
The correct setting should be checked by
measuring the control transformer
’s output
voltage while the system is running with a load.
The control-power transformer is factory-preset to the
rated voltage. However, practice has shown that the
actual supply voltage often differs from this value.
Before first commissioning, set the measured supply
voltage on the control transformer. Fig. 13 illustrates an
example.
Following first commissioning, the setting of the control
transformer must be inspected while operating under
load and corrected where necessary. (see Section
10.9).
Fig. 13
7.5 Checking the Oil Level
DANGER
Air/oil under pressure will cause severe
personal injury or death.
·
Shut down the compressor, relieve the
system of all pressure, disconnect,
lockout and tagout the power supply to
the compressor package before
removing valves, caps, plugs, fittings,
bolts and filters.
CAUTION
Fire hazard and slip hazard!
·
Do not spill any oil!
·
Look for leaks! Immediately take care of
any spilled oil!
NOTICE
Do not mix oils with different specifications.
If the compressor system is delivered without
oil, oil must first be filled into the pressure
reservoir up to the
“maximum oil level” mark.
(For oil filling also see Sections 10.4 and 10.15)
Summary of Contents for L55
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