Siemens E382 EH81E 061 01 03 02, Compressor Compact Service Manual
Compressor Compact
Service Manual
E382 EH81E 061 01 03 02
Important
Important
Compressor Compact
General information
The documentation for the Compressor Compact
consists of:
• Operating Manual
• Service Manual
• Spare Parts List
For proper servicing, the Operating Manual and
the Spare Parts List are indispensable
complements to this Service Manual.
Data on pressures in the Compressor Compact
are given in Pa (bar):
1 kPa = 10 mbar 1 mbar = 0.1 kPa
1 kPa = 0.01 bar 1 bar = 100 kPa
1 kPa ≈ 10 cm H
1 kPa ≈ 0.01 at 1 at ≈ 100 kPa
1 kPa ≈ 0.01 kgf/cm
1 kPa ≈ 0.01 kp/cm
1 kPa ≈ 0.145 psi 1 psi ≈ 6.9 kPa
In addition to the Important information given
here, always pay attention to applicable national
regulations.
If not stated otherwise in this manual:
• The 100 V/50 Hz, 100 V/60 Hz and 115 V/60 Hz
versions are refered to as the 115 V version.
• The 230 V/50 Hz and 240 V/60 Hz versions are
refered to as the 230 V version.
O 1 cm H2O ≈ 0.1 kPa
2
2
2
1 kgf/cm2 ≈ 100 kPa
1 kp/cm2 ≈ 100 kPa
Classification
• Class I equipment.
• according to IEC 601-1.
Type B
Functional check
After any service intervention in the Compressor
Compact, perform a functional check according to
the instructions in the Operating Manual.
Service
Your local Siemens representative supplies the
spare parts indicated in the Spare Parts List.
When ordering spare parts, please state the serial
number of the unit.
The Compressor Compact is oil free, and oil must
not be used when servicing the compressor.
The Compressor Compact must be serviced at
regular intervals as follows:
• 2000 hour overhaul when replacing filters as
described in this Service Manual.
• 8000 hour overhaul as described in this Service
Manual.
To the responsible service personnel
The contents of this document are not binding. If
Hazard notices
The Compressor Compact operates from mains
power supply. With power connected to the unit,
there are energized electrical components as well
as moving mechanical parts inside the equipment.
All personnel must exercise extreme caution when
in the vicinity of this equipment if fault tracing or
adjustments are performed with mains power
supply connected and with the compressor cover
or front panel opened or removed.
The Compressor Compact generates compressed
air at a pressure of 400 kPa (4.0 bar). Do not
attempt to connect or disconnect the compressed
air line or service the compressor section while
compressed air is being supplied. Do not direct
the compressed air line toward the eyes or directly
onto unprotected skin surfaces.
any significant difference between the product and
this documentation is found, please contact your
local Siemens representative for further
information.
We reserve the right to modify products without
amending this document or advising the user.
We recommend that only Siemens authorized
personnel should be permitted to service or repair
the Compressor Compact, and that only SiemensElema genuine spare parts should be used.
Siemens does not otherwise assume responsibility
for the materials used, the work performed, or any
possible consequences of same.
2 Siemens-Elema AB E382 EH81E 061 01 03 02
Compressor Compact
Contents
Page
Important ................................................. 2
Introduction .............................................. 4
General .............................................. 4
Main units ........................................... 5
Basic principles .................................. 6
Description of functions ........................... 12
1. Compressor section........................ 12
2. Cooling section ............................... 14
3. Dryer section .................................. 15
4. Air outlet section ............................. 19
5. Control section ................................ 20
Disassembling and assembling ............... 22
General .............................................. 22
Page
Adjustments ............................................. 39
Pressure regulator .............................. 39
Maintenance ............................................ 40
General .............................................. 40
Performing the 2000 hour overhaul .... 41
Performing the 8000 hour overhaul .... 42
Troubleshooting ....................................... 43
Index ....................................................... 47
Circuit and connection diagrams.............. 48
Without standby function .................... 48
With standby function ......................... 50
Block diagram.......................................... 51
Compressor covers ............................ 23
Transport safety locks ........................ 24
Internal tubing ..................................... 25
Compressor/motor unit ....................... 26
Drive belt ............................................ 27
Belt pulleys ......................................... 28
Compressor ........................................ 29
Thermoelectric cooler ......................... 32
Water separator 2............................... 33
Filter solenoid valves .......................... 34
Pressure regulator .............................. 35
Fan ..................................................... 36
Compressed air reservoir ................... 37
Control section ................................... 38
E382 EH81E 061 01 03 02 Siemens-Elema AB 3
Introduction
Compressor Compact
Introduction
General
The Compressor Compact is designed to
supply medical-grade compressed air.
The compressor has a capacity of approx.
40 l/min at a pressure of 400 kPa (4.0 bar).
The Compressor Compact can be placed on
the ventilator cart to form a compact unit
which is easy to move.
The Compressor Compact is well insulated
against noise and therefore does not cause
disturbance when used during operations.
The Compressor Compact is fitted with two
alarms: a temperature alarm that is activated
if the compressor should overheat and a
pressure alarm that is activated if the air
pressure in the compressed air reservoir
drops.
The Compressor Compact is available in a
number of versions each adapted to different
mains power supply and frequence. With the
exception of the ratings of various electrical
components these versions are identical.
The Compressor Compact can be equipped
with a standby function. In the standby
mode, the compressor will start to deliver
compressed air if the hospital central gas
supply fails.
4 Siemens-Elema AB E382 EH81E 061 01 03 02
Compressor Compact
Introduction
Main units
The Compressor Compact comprises five
main units:
• Compressor section
• Cooling section
• Dryer section
• Air outlet section
• Control section.
Compressor section
Control section
Cooling section
Dryer section
Air outlet section
COMP001E
E382 EH81E 061 01 03 02 Siemens-Elema AB 5
Introduction
Compressor Compact
Basic principles
This text also refers to the Block diagram on
page 53.
Compressor section
Air inlet
with filter
COMP002E
Air inlet
silencer
Compressor
Temperature
sensor
Drive unit
Motor
Heat convector
The compressor section contains the
following main parts:
• Air inlet with filter
• Air inlet silencer
• Temperature sensor
• Motor
• Drive unit
• Compressor
• Heat convector.
The air inlet is supplied with ambient air from
the inside of the dryer section, i.e. air that
has been filtered by the dust filters. This air
then passes through the air inlet with filter
and the air inlet silencer. The air is then
routed to the two-stroke compressor. The
compressor is powered by the electric motor
via the drive unit. The tension of the drive
belt is automatically adjusted.
The action of the compressor imparts heat to
the compressed air. To provide preliminary
cooling, the air flow is passed through the
heat convector before it enters the cooling
section.
The motor, compressor and heat convector
are cooled by the air stream forced through
the compressor section by the fan in the
dryer section. The temperature sensor
detects the ambient air temperature inside
the compressor section and activates the
temperature alarm if the compressor section
is overheated.
6 Siemens-Elema AB E382 EH81E 061 01 03 02
Compressor Compact
Introduction
Cooling section
COMP003E
Cooling coil
The main part of the cooling section is the
cooling coil which provides further preliminary
cooling of the compressed air. The compressed air flow, supplied from the compressor
section, passes through the cooling section
via this cooling coil.
The cooling coil is cooled by the air stream
forced through the cooling section by the fan
in the dryer section. This air stream is then
routed to the compressor section.
E382 EH81E 061 01 03 02 Siemens-Elema AB 7
Introduction
Compressor Compact
Dryer section
Electric
power supply
Fan
Pressure
regulator
Electrical
interconnection
COMP004E
Fuses
Dust
filter
Filter / Solenoid
valves
The dryer section contains the following
main parts:
• Water separator 1
• Thermoelectric cooler
• Water separator 2
• Filter/solenoid valves
• Drainage bottle
• Standby solenoid valve
• Low pressure switch
• Standby pressure switch
• Pressure regulator
• Electric power supply
• Electrical interconnection
• Fuses
Thermoelectric cooler
Drainage
bottle
Water
separator 2
Water
separator 1
COMP016E
Fan
Low
pressure
switch
• Dust filters
• Fan.
Compressed air, supplied from the cooling
section, passes through water separator 1.
In this “water trap”, some amount of water is
separated from the compressed air.
The air flow then passes through the
thermoelectric cooler where the air
temperature is further lowered. Moisture that
remains in the compressed air is then partly
transformed into water by condensation. This
water is separated from the air in water
separator 2.
The dried, compressed air from the air outlet
of water separator 2 is collected in the
compressed air reservoir.
A pressure regulator is connected to the
compressed air tubing. Air pressure in excess
of the preset level on this pressure regulator,
normally approx. 400 kPa (4.0 bar), will
cause a flow which is fed back to the inlet of
the compressor via the air inlet silencer.
8 Siemens-Elema AB E382 EH81E 061 01 03 02
Compressor Compact
Introduction
Water separators 1 and 2 are automatically
drained at regular intervals by the two filter/
solenoid valves. The water is collected in the
drainage bottle.
A low pressure switch is connected to the
compressed air reservoir. This switch
(sensor) detects the air pressure inside the
compressed air reservoir and activates the
pressure alarm if the air pressure in the
reservoir drops.
Thermoelectric cooler
Drainage
bottle
Water
separator 1
Water
separator 2
Standby
solenoid
valve
Compressors equipped with the standby
function also include a standby solenoid
valve and a standby pressure switch.
Compressed air from the hospital central gas
supply is connected to the compressed air
reservoir (via the standby solenoid valve). If
the hospital central gas supply fails, the
pressure in the reservoir drops. This air
pressure drop is then detected by the
standby pressure switch and the compressor
starts to deliver compressed air to the
reservoir.
The electric power supply functions (transformer, rectifier, capacitors, etc.) are located
in the dryer section. Internal power supply is
distributed from the electrical interconnection
block. The mains power fuses and the
cooling dryer fuse are also situated at the
electrical interconnection block.
The dryer section also contains a fan to
COMP005E
Low
pressure
switch
Standby
pressure
switch
Fan
provide forced air cooling in the cooling
section and compressor section. Two dust
filters remove dust particles from the ambient
air before the air is drawn into the fan.
E382 EH81E 061 01 03 02 Siemens-Elema AB 9
Introduction
Compressor Compact
Air outlet section
The air outlet section contains the following
main parts:
• Compressed air reservoir
• Pressure manometer
• Moisture relief valve
• Compressed air outlet
• Compressed air inlet
• Cooling air outlet.
The dried air is supplied via water separator 1
in the dryer section to the compressed air
reservoir. The compressed air is available at
the compressed air outlet.
Compressed
air reservoir
COMP006E
Pressure
manometer
Moisture
relief
valve
The air pressure in the compressed air
reservoir is displayed by the pressure
manometer.
If water, for some reason, is collected in the
compressed air reservoir, this water can be
removed by pressing the valve pin of the
moisture relief valve.
Compressors equipped with the standby
function include a compressed air inlet
where the hospital central gas supply
(medical grade air) is connected.
The cooling air stream that has been forced
through the cooling section and compressor
section exits via the silenced cooling air
outlet.
Cooling
air outlet
COMP007E
Compressed
air outlet
Compressed
air inlet
10 Siemens-Elema AB E382 EH81E 061 01 03 02
Compressor Compact
Introduction
Control section
ON/OFF
switch
COMP008E
Electrical
control
function
Operating
time meter
Indicator lamps
Test button
The control section contains the following
main parts:
• On/off switch
Buzzer
• Operating time meter
• Electrical control functions
• Test button
• Indicator lamps
• Buzzer.
Mains power to the compressor is connected
via and controlled by the on/off switch. The
operating time meter indicates how many
hours the compressor has been running.
Electrical control functions are located on a
PC board in the control section. This PC
board also contains the timing circuit for the
solenoid valves.
There are three indicator lamps (four if the
compressor is equipped with the standby
function). The test button is used to check
that the indicator lamps for temperature
alarm and pressure alarm light up.
The audible alarm (buzzer) is activated
together with the indicator lamp during
temperature alarm and pressure alarm.
E382 EH81E 061 01 03 02 Siemens-Elema AB 11
Description of functions Compressor Compact
Description of functions
The text in this chapter Description of
functions refers to the:
• Circuit and connection diagrams and Block
diagram on pages 48 – 51.
1. Compressor section
1.1 Air inlet with filter
The AIR INLET WITH FILTER supplies
ambient air from the 3. DRYER SECTION to
the 1.2 SILENCER. The filter is made of a
felt, and must be replaced at the 2000 hour
overhaul as well as at the 8000 hour
overhaul. The filter must not be cleaned in
any liquid.
1.4 Motor
The Compressor Compact is equipped with
a single phase electric MOTOR. The motor
is designed according to IEC 34 standards.
There are several different versions of the
motor each adapted to different mains power
supply and frequence.
The motor is equipped with a thermal switch
that will disconnect the current through the
motor if the motor is overheated.
115 V version
The 115 V motor is fitted with a manually
resetable thermal switch. When the motor
has cooled down, the thermal switch must be
reset manually by pushing the reset button
on the motor.
Reset
button
1.2 Silencer
The air inlet SILENCER will reduce the noise
from the air inlet of the compressor at the
same time as it works as an air distributor to
the two cylinder heads of the 1.6 COMPRESSOR.
1.3 Temperature sensor
The TEMPERATURE SENSOR detects the
temperature inside the 1. COMPRESSOR
SECTION. If the temperature at this sensor
exceeds 70°C ±3°C (158°F ±5°F), the
temperature alarm is activated.
The temperature alarm is deactivated when
the compressor is switched off or when the
temperature at the sensor drops below
55°C ±6°C (131°F ±11°F).
COMP068E
230 V version
The 230 V motor is fitted with a self-resetting
thermal switch. When the motor cools down,
the thermal switch will automatically restart
the motor.
Note – 230 V versions of the Compressor
Compact as well as spare part motors
manufactured up to and including June 1993
are not equipped with this thermal switch.
The temperature alarm function is further
described in section 5.6 TEMPERATURE
ALARM LAMP.
12 Siemens-Elema AB E382 EH81E 061 01 03 02
Compressor Compact Description of functions
1.6 Compressor
As motors fitted with a self-resetting
termal switch can restart automatically,
all personnel must exercise extreme
caution when in the vicinity of this equipment if fault tracing is performed with
mains power supply connected and with
the compressor cover opened or
removed.
The COMPRESSOR is an oil free twincylinder assembly in which the filtered air is
compressed by the action of the twin pistons.
A manifold pipe is connected between the
two cylinder heads so that the compressed
air generated collectively by both pistons is
available at a single outlet on one of the
cylinder heads.
The compressor’s capacity is at least a flow
rate of 40 l/min at a pressure of 400 kPa
The motion of the motor is transmitted to the
compressor by the 1.5 DRIVE UNIT.
(4.0 bar). The compressor speed is approx.
1250 r/min.
A complete overhaul of the compressor must
be performed at the 8000 hour overhaul.
1.5 Drive unit
The DRIVE UNIT transmits the motor's
motion to the compressor. The drive unit
consists of two grooved belt pulleys, a drive
belt and a spring-loaded belt tightener.
The two pulleys are mounted on the motor
shaft and compressor shaft with clamp
bushes (see chapter Disassembling and
assembling for further information).
The transmission ratio is approx. 1 : 2.7 for the
60 Hz motor and 1 : 2.3 for the 50 Hz motor.
The tension of the drive belt is automatically
adjusted by the belt tightener.
The drive belt must be replaced at the 8000
hour overhaul.
1.7 Heat convector
Preliminary cooling of the compressed air is
provided by the HEAT CONVECTOR. This
heat convector is connected to the output of
the 1.6 COMPRESSOR and supplies compressed air to the 2. COOLING SECTION.
E382 EH81E 061 01 03 02 Siemens-Elema AB 13
Description of functions Compressor Compact
2. Cooling section
2.1 Cooling coil
A further preliminary cooling of the
compressed air is provided by the COOLING
COIL assembly, which is made of metal
tubing. The compressed air to this cooling
coil is supplied from the 1.7 HEAT CONVECTOR, and the output is connected to 3.1
WATER SEPARATOR 1.
The cooling coil is cooled by the air stream
forced through the cooling section by the fan
in the dryer section. This air stream is then
routed to the compressor section.
3. Dryer section
3.1 Water separator 1
WATER SEPARATOR 1 is a “water trap”
made of a Y-piece connector. This water
separator is connected to the outlet of the
2.1 COOLING COIL, and it supplies
compressed air to the 3.2 THERMOELECTRIC COOLER and to the 3.9 PRESSURE
REGULATOR.
The purpose of this water separator is to
collect moisture that has been transformed
into water by condensation when passing
through the cooling section.
The water separator is automatically drained
at regular intervals by one of the two 3.4
FILTER/SOLENOID VALVES, and the water
is collected in the 3.5 DRAINAGE BOTTLE.
WATER SEPARATOR 1 in compressors
with standby function has a different design,
see the chapter Introduction, Dryer section.
The function and purpose of this water
separator is as described above.
3.2 Thermoelectric cooler
The dryer section is equipped with a
THERMOELECTRIC COOLER designed for
12 V DC power supply. The thermoelectric
cooler is a self-contained unit including a
Peltier element which has one cool side and
one warm side.
The compressed air is supplied to the cool
side of the element via 3.1 WATER SEPARATOR 1. When the temperature of the
compressed air is lowered, moisture that
remains in the air is partly transformed into
water by condensation. This water is then
collected in 3.2 WATER SEPARATOR 2
which is connected to the outlet of the
thermoelectric cooler.
The warm side of the Peltier element is
cooled by the air stream provided by the
3.14 FAN.
14 Siemens-Elema AB E382 EH81E 061 01 03 02
Compressor Compact Description of functions
A cooler temperature switch (thermostat) is
connected to the Peltier element. The switch
detects the temperature at the cool side of
the element. To avoid formation of ice in the
thermoelectric cooler, this switch will cut the
power supply to the Peltier element if the
temperature drops below approx. +2°C
(+36°F). This thermostat is factory calibrated
and must not be adjusted.
The PC board RCD connected to the thermostat is a spark arrestor. This PC board RCD
is included in the different versions of the
Compressor Compact
with standby function
as follows:
• 100 V/50 Hz: Serial No. 50001 or higher.
• 100 V/60 Hz: Serial No. 40001 or higher.
• 115 V/60 Hz: Serial No. 20531 or higher.
• 230 V/50 Hz: Serial No. 30530 or higher.
3.3 Water separator 2
WATER SEPARATOR 2 is a standard
compressed air filter provided to filter the air
as well as to separate water from the air.
This water separator is connected to the
outlet of the 3.2 THERMOELECTRIC
COOLER, and it supplies compressed air to
the 4.1 COMPRESSED AIR RESERVOIR
(via the 3.6 STANDBY SOLENOID VALVE
in compressors with standby function).
Water separated from the air is collected in
the metal bowl. The water separator is
automatically drained at regular intervals by
one of the two 3.4 FILTER/SOLENOID
VALVES, and the water is collected in the
3.5 DRAINAGE BOTTLE.
Water separator 2 must be overhauled at the
8000 hour overhaul.
• 240 V/60 Hz: Serial No. 60013 or higher.
The PC board RCD must be connected with
correct polarity, refer to the Connection
diagrams.
Due to service interventions and recommended updates, the PC board RCD can be
included also in Compressor Compact as
follows:
• Compressor Compact
with standby
function with Serial No. lower than stated
in the list above. Exceptions: Units with
Serial No. 126 or lower.
• Compressor Compact 230 V/50 Hz
without
standby function. Exceptions: Units with
Serial No. 469 or lower.
Note: A spark arrestor of a different design
(with components mounted onto the cables)
has been installed in the 115 V/60 Hz version
of Compressor Compact with Serial No.:
20498 – 20530. The PC board RCD must
not be installed in these units as long as the
spark arrestor with components mounted
onto the cables is installed.
3.4 Filter/solenoid valves
The two identical FILTER/SOLENOID
VALVES are designed for 12 V DC power
supply. The purpose of these valves is to
remove water collected in 3.1 WATER
SEPARATOR 1 and 3.3 WATER SEPARATOR 2 at regular intervals.
The electrically controlled solenoid valves
are closed in non-activated condition. During
operation, the solenoid valves will be
activated (open) for approx. 0.5 seconds
twice every minute by the timing circuit in
5.3 ELECTRICAL CONTROL FUNCTIONS.
When the solenoid valves open, the water
collected in the water separators will be
transported to the 3.5 DRAINAGE BOTTLE
via solenoid valves.
The filter/solenoid valves must be
overhauled at the 8000 hour overhaul.
E382 EH81E 061 01 03 02 Siemens-Elema AB 15
Description of functions Compressor Compact
3.5 Drainage bottle
The DRAINAGE BOTTLE collects the water
that is extracted from the compressed air by
3.1 WATER SEPARATOR 1 and 3.3 WATER
SEPARATOR 2. It is a plastic container with
a screw cap into which the water hose from
the water separators is connected. There is
a ventilation hole in the cap.
3.6 Standby solenoid valve
Compressors with standby function are
equipped with a STANDBY SOLENOID
VALVE. This is an electrically controlled
three-port valve with the following function:
1.If the air pressure in the hospital central
gas supply, connected to the 4.5 COMPRESSED AIR INLET, is above approx.
300 kPa (3.0 bar), the standby solenoid
valve connects this inlet with the 4.1
COMPRESSED AIR RESERVOIR. The
compressor is not active.
2.If the air pressure in the hospital central
gas supply, connected to the 4.5 COMPRESSED AIR INLET, drops and stays
below approx. 300 kPa (3.0 bar) for a few
seconds, the standby solenoid valve
connects the 3.1 WATER SEPARATOR 2
with the 4.1 COMPRESSED AIR
RESERVOIR. The compressor starts to
supply compressed air to the reservoir.
3.7 Low pressure switch
The LOW PRESSURE SWITCH is
connected to the 4.1 COMPRESSED AIR
RESERVOIR. This switch will activate the
pressure alarm if the air pressure in the
reservoir drops and stays below 280 kPa
(2.8 bar) for more than 10 seconds.
The pressure alarm is deactivated when the
compressor is switched off or when the
pressure in the reservoir rises above approx.
280 kPa (2.8 bar).
The pressure alarm function is further
described in section 5.8 PRESSURE
ALARM LAMP.
3.8 Standby pressure switch
Compressors with standby function are
equipped with a STANDBY PRESSURE
SWITCH. This switch will start the
compressor if the air pressure in the 4.1
COMPRESSED AIR RESERVOIR (supplied
by the hospital central gas supply via the 4.5
COMPRESSED AIR INLET) drops and stays
below 300 kPa (3.0 bar) for a few seconds.
The switch will also set the 3.6 STANDBY
SOLENOID VALVE to supply gas from the
1.6 COMPRESSOR.
The standby function is further described in
section 5.7 STANDBY LAMP.
The standby solenoid valve is controlled by
the 3.8 STANDBY PRESSURE SWITCH
via the 5.3 ELECTRICAL CONTROL
FUNCTIONS.
The standby function is further described in
section 5.7 STANDBY LAMP.
16 Siemens-Elema AB E382 EH81E 061 01 03 02
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