Heidolph ROTAVAC User Manual

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ROTAVAC vario Pumping unit

Instruction manual

Documents are only to be used and distributed completely and unchanged. It is strictly the users´ responsibility to check carefully the validity of this document with respect to his product. Manual-no.: 999248 / 28/04/2011

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[GB] It is imperative to read this instruction manual prior to initial operation! Comply with safety instructions!

Keep for further use!

This documentation is not subject to revision service!

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Danger! Immediate danger. Death or severe injuries as well as damage to equipment and environment can occur.

Warning! Possible danger. Severe injuries as well as damage to equipment and environment can occur.

• Caution! Possible danger. Slight injuries as well as damage to equipment and environment can occur.

NOTICE	Note. Disregarding of notes may cause damage to the product.

Caution! Hot surface!

Isolate equipment from mains before removing the cover.

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Reset / Language selection

1 switch off

2 press both

3 turn

4 press

			V2.12

			Portuguê
Deutsch
English			Ρyccкий
Français			Polski
Italiano			Nederl.
Español
Türkçe			Suomi

			V2.12
Deutsch			Portuguê
English			Ρyccкий
Français			Polski
Italiano			Nederl.
Español
Türkçe			Suomi

	page 6 of 61
	Contents
Reset / Language selection......................................................................................		5
Safety information!.....................................................................................................		7
1.1	General information......................................................................................................................	7
1.2	Intended use.................................................................................................................................	7
1.3	Setting up and installing the equipment........................................................................................	7
1.4 Ambient conditions........................................................................................................................		8
1.5	Operating conditions.....................................................................................................................	8
1.6	Safety during operation.................................................................................................................	9
1.7	Maintenance and repair..............................................................................................................	11
2 Standard items and options..................................................................................		12
3 Technical data........................................................................................................		13
3.1 Gas inlet temperatures...............................................................................................................		14
3.2 Wetted parts...............................................................................................................................		15
3.3 Pump parts.................................................................................................................................		15
4 Use and operation..................................................................................................		18
4.1	Using a ROTACOOL reflux cooler .............................................................................................	18
4.2	Installing in a vacuum system.....................................................................................................	18
4.3	Condensate cooler (accessory)..................................................................................................	19
4.4	During operation.........................................................................................................................	20
4.5 Attention: Important notes regarding the use of gas ballast........................................................		21
4.6	Shutdown....................................................................................................................................	22
5 Controller................................................................................................................		23
5.1 Menu guide..........................................................................................................		26
5.2 Function Pump down..........................................................................................		27
5.3 Function Vac control...........................................................................................		29
5.4 Function Auto mode...........................................................................................		31
5.5 Function Program...............................................................................................		32
Example for use...............................................................................................................................		33
5.6 Function VACUULAN..........................................................................................		34
5.7 Examples for use................................................................................................		35
5.7.1 Vacuum for filtration and suction.............................................................................................		35
5.7.2 Vacuum for gel dryer, drying chambers and vacuum concentrators.......................................		35
5.7.3 Vacuum for distillation and evaporation (e. g. rotary evaporator)...........................................		36
5.7.4 Vacuum for VACUU•LAN networks.........................................................................................		36
5.8 Function Configuration......................................................................................		37
6 Readjustment of the controller.............................................................................		38
7 Interface parameters..............................................................................................		39
7.1 Setting of the interface...............................................................................................................		39
7.2 Read commands .......................................................................................................................		40
7.3 Write commands........................................................................................................................		43
8 Assembling the condensate cooler (accessory).................................................		45
9 Troubleshooting.....................................................................................................		46
10 Cleaning the pressure transducer......................................................................		49
11 Replacing diaphragms and valves.....................................................................		50
11.1 Cleaning and inspecting the pump heads................................................................................		51
11.2 Replacing the diaphragm.........................................................................................................		53
11.3 Replacing the valves and assembly of the pump heads..........................................................		54
11.4 Replacing the overpressure safety relief device at the condenser...........................................		57
12 Warranty, liability, copyright...............................................................................		58
13 FAQ / repair work.................................................................................................		59
14 Confirmation of condition of unit.......................................................................		60

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Safety information!

1.1 General information

NOTICE	Read and comply with this manual before installing or operating the equipment.

	Remove all packing material, remove the product from its packing-box, remove the

	protective covers from the inlet and outlet ports and keep, inspect the equipment.
	If the equipment is damaged, notify the supplier and the carrier in writing within three
	days; state the item number of the product together with the order number and the
	supplier’s invoice number. Retain all packing material for inspection.
	Do not use the equipment if it is damaged.
	If the equipment is not used immediately, replace the protective covers. Store the
	equipment in suitable conditions.
	1.2 Intended use
	The pump and all system parts must not be used on humans or animals.
	Prevent any part of the human body from coming in contact with vacuum.
	Ensure that the individual components are only connected, combined and oper-
		ated according to their design and as indicated in the instructions for use.
	Comply with notes on correct vacuum and electrical connections, see section
		”Use and operation”.
	•	The pumps are designed for ambient temperatures during operation between
		+10°C and +40°C. Check the maximum temperatures if installing the pump in a
		cabinet or a housing and make sure ventilation is adequate. Install an external
		automatic ventilation system if necessary. If pumping hot process gases make
		sure that the maximum permitted gas inlet temperature, which depends on sev-
		eral parameters like inlet pressure or ambient temperature (see ”Technical data”),
		is not exceeded.
	•	Particles and dust must not be aspirated.
	Use the equipment for the intended use only, i.e. for generation, control and meas-
NOTICE
NOTICE	urement of vacuum in vessels designed for that purpose.

1.3 Setting up and installing the equipment

Equipment must be connected only to a suitably fused and protected electrical supply and a suitable earth point. Failure to connect the motor to ground may result in deadly electrical shock.

The mains cable may be fitted with a moulded European IEC plug or a plug suitable for your local electrical supply. If the plug has been removed or has to be removed, the cable will contain wires colour coded as follows: green or green and yellow: earth; blue or white: neutral; brown or black: live.

Due to the high compression ratio of the pump, the pressure at the outlet port might get higher than the maximum permissible pressure compatible with the mechanical stability of the system.

Do not permit any uncontrolled pressurizing (e. g. make sure that the exhaust pipeline cannot become blocked). If there is an exhaust isolation valve, make sure that you cannot operate the equipment with the valve closed. Risk of bursting!

NOTICE

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Always provide a free and pressureless exhaust pipeline.

Max. permitted pressure at the pressure transducer: 1.5 bar (absolute).

Avoid overpressure of more than 0.2 bar in case inert gas is connected to the pump, the gas ballast connection or to a venting valve.

•Comply with maximum permissible pressures at inlet and outlet and pressure differences, see section ”Technical data”. Do not operate the pump with overpressure at the inlet.

•Check that mains voltage and current conform with the equipment (see rating plate).

•Connect pipes gas tight at inlet and outlet of the pump.

•Attention: Flexible elements tend to shrink when evacuated.

Provide a firm level platform for the equipment and check that the system to be evacuated is mechanically stable and that all fittings and hose connections are secure. Ensure a stable position of the pump without any mechanical contact except of the pump feet. Comply with all applicable safety regulations.

Keep a distance of minimum 20 cm between fan and ambient parts (e.g. housing, walls, ...). Check fan regularly for dust/dirt, clean if necessary to avoid a cutback of ventilation.

If the equipment is brought from cold environment into a room for operation, allow the equipment to warm up (pay attention to water condensation on cold surfaces).

The diameter of the inlet and outlet pipeline should be at least as large as the diameter of the pump connection pipelines.

Comply with all applicable and relevant safety requirements (regulations and guidelines), implement the required actions and adopt suitable safety measures.

1.4 Ambient conditions

To the best of our knowledge the equipment is in compliance with the requirements of the applicable EC-directives and harmonized standards (see ”Declaration of conformity”) with regard to design, type and model. Directive EN 61010-1 gives in detail conditions under which the equipment can be operated safely (see also IP degree of protection).

Adopt suitable measures in case of differences, e. g. using the equipment outdoors, installation in altitudes of more than 1000 m above mean sea level, conductive pollution or bedewing.

Pay attention to the permissible maximum ambient and gas inlet temperatures

(see ”Technical data”).

1.5 Operating conditions

The pumps have no approval for operation in or for pumping of potentially explosive atmospheres.

The pumps are not suitable to pump

-unstable substances and substances which react explosively under impact (mechanical stress) and/or when being exposed to elevated temperatures without air,

-self inflammable substances,

-substances which are inflammable without air and

-explosive substances.

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		• The pumps are not suitable for pumping substances which may form deposits
		inside the pump. Deposits and condensate in the pump may lead to increased
		temperatures even to the point of excessing the maximum permitted tempera-
		tures!
		• If there is a danger of formation of deposits in the pump chamber (check inlet
		and outlet of the pump), inspect the pump chambers regularly and clean if neces-
		sary.
		• The pumps are not suitable for pumping dust and have no approval for opera-
		tion below ground.
		If pumping different substances, it is recommended to purge the pump with air or
	NOTICE
	NOTICE	inert gas prior to changing the pumped media in order to pump out residues and to
		avoid reactions of the pumped substances with each other and with the pump ma-
		terials.
		Take into consideration interactions and chemical reactions of the pumped me-
		dia. Ensure that the materials of the wetted parts are compatible with the pumped
		substances, see section ”Technical data”.

1.6 Safety during operation

Adopt suitable measures to prevent the release of dangerous, toxic, explosive, corrosive, noxious or polluting fluids, vapours and gases. In case install an appropriate collecting and disposal system and take protective action for pump and environment.

Prevent any part of the human body from coming into contact with vacuum.

The user must take suitable precautions to prevent any formation of explosive mixtures in the expansion chamber or at the outlet. In case of e.g. a diaphragm crack, mechanically generated sparks, hot surfaces or static electricity may ignite these mixtures. Use inert gas for gas ballast or venting if necessary.

Potentially explosive mixtures at the outlet of the pump have to be drained appropriately, sucked off or diluted with inert gas to non-explosive mixtures.

Pay attention to the symbol ”hot surfaces” on the equipment. Adopt suitable measures to prevent any danger arising from the formation of hot surfaces or electric sparks. Provide a suitable protection against contact if necessary.

+ Ensure that the exhaust pipeline is always free and pressureless.

Pumping at high inlet pressure may lead to overpressure at the gas ballast valve. Pumped gases or condensate might be pushed out in case the valve is open. If an inert gas supply is connected, ensure that the inlet pipeline is not contaminated.

+Attention: If the pressure is higher than approximately 1080 mbar the pressure reading becomes incorrect (saturation of the pressure transducer). The display flashes. Immediate pressure relief necessary! Risk of bursting!

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		• Comply with applicable regulations when disposing of chemicals. Take into con-
		sideration that chemicals may be polluted.
		Take adequate precautions to protect people from the effects of dangerous sub-
		stances (chemicals, thermal decomposition products of fluoroelastomers), wear
		appropriate safety-clothing and safety glasses.
		• Use only genuine spare parts and accessories. Otherwise safety and perform-
		ance of the equipment as well as the electromagnetic compatibility of the equip-
		ment might be reduced.
		Possibly the CE mark or the C/US conformity becomes void if not using genuine
		spare parts.
		• Switching of an in-line valve or opening of a venting valve by the controller must
		not lead to a critical dangerous situation under any circumstances.
		• Attention: If Auto-Start is preselected, the process starts immediately after a
		power failure without pressing any further key. It is the user’s responsibility to
		ensure that no dangerous status of the system due to the automatic start-up can
		occur and to provide appropriate safety measures. If necessary, the user has to
		check prior to starting process control whether the option ”Auto-Start” is ena-
		bled.
		Do not start the pump if the pressure difference between inlet and outlet port ex-
	NOTICE
	NOTICE	ceeds 1.1 bar at maximum.
		Prevent any backpressure of gases and the backflow of condensates.
		Never suck liquids or dust into the pump.
		Provide appropriate protective measures (i.e precautions which allow for the require-
		ments of the respective application) even for the case of failure and malfunction.
		Failure of the pump (e.g. due to power failure) or of connected components, of parts
		of the supply or change of parameters must not lead to a critical dangerous situa-
		tion under any circumstances. In case of diaphragm cracks or leaks in the manifold
		pumped substances might be released into the environment or into the pump hous-
		ing or motor. Comply especially with notes on operation and use and maintenance.
		Due to the residual leak rate of the equipment, there might be an exchange of gas,
		albeit extremely slight, between the environment and the vacuum system.
		Adopt suitable measures to prevent contamination of the pumped substances or the
		environment.
		The controller is powered by a short circuit proof wide-range power supply with
		integrated overload protection.
		The motor is protected by a temperature sensor at the circuit board: Current
		limitation if the temperature at the circuit board is higher than 70°C, switching off the
		pump if the temperature is higher than 85°C. In case of blockade of the motor (after
		10 attempts to start-up) the pump is switched off.
		If the pump is switched off due to safety measures, manual reset is necessary. Isolate
		the pump from mains. Eliminate the cause of failure before restarting the pump.

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		1.7 Maintenance and repair
		Wear parts have to be replaced regularly. In case of normal wear the lifetime of the
	NOTICE
	NOTICE	diaphragms and valves is > 10000 operating hours. Bearings have a typical durability
		of 40000 h.
		Isolate equipment from mains and wait two minutes before starting mainte-
		nance to allow the capacitors to discharge.
		Ensure that the pump cannot be operated accidentally. Never operate the pump
		if covers or other parts of the pump are disassembled. Never operate a defective
		or damaged pump.
		Attention: The pump might be contaminated with process chemicals which have
		been pumped during operation. Ensure that the pump is decontaminated before
		maintenance and take adequate precautions to protect people from the effects of
		dangerous substances if contamination has occurred.
		• Before starting maintenance vent the pump, isolate the pump and other compo-
		nents from the vacuum system. Allow sufficient cooling of the pump.
		Ensure that maintenance is done only by suitably trained and supervised techni-
		cians. Ensure that the maintenance technician is familiar with the safety procedures
		which relate to the products processed by the pumping system.
		In order to comply with law (occupational, health and safety regulations, safety at
		work law and regulations for environmental protection) vacuum pumps, components
		and measuring instruments returned to the manufacturer can be repaired only when
		certain procedures (see section ”Notes on return to the factory”) are followed.

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2 Standard items and options

		qty	P/N	P/N
	Item	qty	200-240 V	100-120 V
	Item		200-240 V	100-120 V
			50/60 Hz	50/60 Hz

	ROTAVAC vario Pumping unit	1	591-00142-00	591-00142-01


Standard items ROTAVAC vario control / ROTAVAC vario tec

	ROTAVAC vario control (pump)	1

	Power cord	1	14-007-003-81	14-007-003-89

	Instruction manual	1	01-005-005-24

	Warranty card /	1	01-006-002-58
	Confirmation of condition of unit	1	01-006-002-58
	Confirmation of condition of unit

Accessories (optional)

	Item	P/N

	ROTAVAC vario Pumping unit condensate cooler	591-00084-00

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3 Technical data

Type		ROTAVAC vario Pumping unit

Maximum pumping speed (ISO 21360)	m3/h	1.7
Ultimate vacuum (absolute) without gas	mbar	5
ballast*	mbar	5
ballast*
Ultimate vacuum (absolute) with gas bal-	mbar	7
last*	mbar	7
last*
Maximum permissible inlet pressure	bar	1.1
(absolute)	bar	1.1
(absolute)
Maximum permissible outlet pressure	bar	1.1
(absolute)		1.1
(absolute)
Maximum permitted pressure difference		1.1
between inlet and outlet		1.1
between inlet and outlet
Maximum permissible pressure (absolute)	bar	1.2
at gas ballast valve	bar	1.2
at gas ballast valve
Permissible ambient temperature
storage	°C	-10 to +60
operation	°C	+10 to +40
Permissible relative atmospheric moisture	%	30 to 85
during operation (no condensation)	%	30 to 85
during operation (no condensation)
Rated power	kW	0.16

No-load speed**	min-1	0 - 2400
Maximum permissible range of supply		100-120 V~ 50/60 Hz
voltage ( +/- 10% )		100-120 V~ 50/60 Hz
voltage ( +/- 10% )		200-240 V~ 50/60 Hz
Attention: Observe specifications of rating plate!		200-240 V~ 50/60 Hz
Attention: Observe specifications of rating plate!
Maximum rated current at:
100-120 V~ 50/60 Hz	A	1.6
200-230 V~ 50/60 Hz	A	0.7
Motor protection		temperature sensor on the pcb
Motor protection		(current limitation)
		(current limitation)
Degree of protection IEC 529		IP 20

Inlet		hose nozzle DN 8/10 mm

Outlet		hose nozzle DN 8 mm

A-weighted emission sound pressure	dB(A)	42
level*** (uncertainty KpA: 3 dB(A))	dB(A)	42
level*** (uncertainty KpA: 3 dB(A))
Dimensions L x W x H approx.	mm	294 x 192 x 299

Weight approx.	kg	6.0

*Ultimate vacuum with function ”Pumpdown” and at speed ”HI”

**Note: In the motor speed range between 0 and approx. 200 rpm the pump is running automatically in a cycled interval operation.

***Measurement according to EN ISO 2151:2004 and EN ISO 3744:1995 at 1500rpm and ultimate vacuum with exhaust tube at outlet.

We reserve the right for technical modifications without prior note!

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	Controller

	Pressure transducer	ceramic diaphragm (alumina), capacitive, abso-
	Pressure transducer	lute pressure, gas type independent
		lute pressure, gas type independent
	Display	LCD graphic display, illuminated

	Pressure units / scale (selectable)	mbar, Torr or hPa

	Measuring range (absolute)	1080 mbar - 0.1 mbar (810 Torr - 0.1 Torr)

	Maximum control range with internal pressure	1060 mbar – 1 mbar (795 Torr – 1 Torr),
	transducer (absolute)*	Turbo-Mode (<1 mbar / Torr)
	Resolution	0.1 mbar

	Maximum permissible pressure at pressure	1.5 bar (1125 Torr)
	transducer (absolute)	1.5 bar (1125 Torr)
	transducer (absolute)
	Maximum permissible temperature of gaseous	continuous operation: 40°C,
	media	for short periods up to 80°C
	Measurement uncertainty (absolute) after careful	<±1 mbar (0.75 Torr)
	adjustment and at constant temperature	<±1 mbar (0.75 Torr)
	adjustment and at constant temperature
	Temperature coefficient	<± 0.07 mbar/K (0.05 Torr/K)

	Ambient temperature range (operation)	10°C to +40°C

	Ambient temperature range (storage)	-10°C to +70°C

	Permitted relative atmospheric moisture during	30% to 85%
	operation (no condensation)	30% to 85%
	operation (no condensation)
	Maximum permitted current of connected valves	4 A
	(connected components)	4 A
	(connected components)
	Venting connection	hose nozzle for hose 4-5 mm

	Maximum admissible pressure at venting	1.2 bar absolute
	connection	1.2 bar absolute
	connection
	Degree of protection according to IEC 529	IP 42
	(front side)	IP 42
	(front side)
	Interface	RS 232 C

*The actual vacuum control range in your special application might be reduced due to ultimate vacuum of the pump, quantity of gas occurring etc.

3.1Gas inlet temperatures

Operating condition	Inlet pressure	Permitted range of gas
Operating condition	Inlet pressure	temperatures at inlet
		temperatures at inlet
Continuous operation	> 100 mbar (high gas load)	+10°C to +40°C

Continuous operation	< 100 mbar (low gas load)	0°C to +60°C

Short-time (< 5 minutes)	< 100 mbar (low gas load)	-10°C to +80°C

We reserve the right for technical modification without prior notice!

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3.2 Wetted parts

Components		Wetted materials

Pump

Housing cover		PTFE

Head cover		ETFE carbon fibre reinforced

Diaphragm clamping disc		ETFE carbon fibre reinforced

Diaphragm		PTFE

Valves		FFKM / PTFE

Inlet		PP, stainless steel, FPM

Distributor (at inlet)		PP

O-ring		FPM

Outlet		ETFE

Tubing		PTFE

Screw-in fittings		ETFE / ECTFE

Controller

Sensor		Aluminium oxide ceramic

Sensor housing		PPS / glass fibre

Sensor seal		Chemically resistant fluoroelastomer

Venting valve seal		FPM

We reserve the right for technical modification without prior notice!

3.3 Pump parts

Position Component

1	chemistry diaphragm pump

2	controller

3	mains connection

4	ON/OFF switch

5	inlet

6	outlet

7	gas ballast valve

Position	Component

8	control cable

9	condensate cooler

10	catchpot

11	coolant inlet

12	coolant outlet

13	overpressure safety relief device

14	accessory foot

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ROTAVAC vario Pumping unit

Rear side controller

jacks for connection of VACUU•BUS components (e.g., coolant valve) external venting valve)

rating plate

connection plug of the	venting connection
VACUU • BUS line to VARIO pump
	serial interface
	RS 232 C

vacuum connection

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ROTAVAC vario Pumping unit with condensate cooler

(accessory)

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4 Use and operation

When switching on the controller for the very first time, a menu to select the language of the controller menu is displayed. Select the desired language (e.g. ”English”) by turning the selection knob and press to confirm. Then select the pressure unit (”mbar”, ”Torr” or ”hPa”) in the same way.

It is possible to access the language selection menu at any time by switching on the controller while keeping the selection knob pressed.

4.1 Using a ROTACOOL reflux cooler

If using the ROTAVAC vario Pumping unit together with the ROTACOOLreflux cooler, place the ROTAVAC vario

Pumping unit directly on top of the ROTACOOL.

If using the ROTAVAC vario Pumping unit without the

ROTACOOL reflux cooler, an extra foot has to be installed for operation with the condensate cooler (14; included in the scope of delivery of the condensate cooler). Position the ROTAVAC vario Pumping unit simply on the extra foot, thereby placing the pump’s feet in the four hollows of the extra foot.

Install the coolant hoses in such a way that the stability of the pump is assured even with a full catchpot

4.2 Installing in a vacuum system

•Connection lines at the pump inlet have to be gas tight. Particles and dust must not be aspirated, the user has to provide appropriate filters if necessary. The user must ensure their suitability concerning gas flow, chemical resistance and safeness against clogging prior to use.

•Connect an exhaust line gas tight at the pump outlet if necessary. Always dispose of exhaust gases appropriately (e.g. into a fume hood). If there is risk of release of dangerous or polluting fluids, install an appropriate system to catch and dispose of those fluids.

•Reduce the transmission of vibration and prevent loading due to rigid pipelines. Insert elastic hoses or flexible elements as couplings between the pump and rigid pipes. Attention: Flexible elements tend to shrink when evacuated.

•The exhaust line has always to be free (pressureless) to ensure an unimpeded discharge of gas.

•Especially if the gas ballast valve is open, a power failure may cause unintentional ventilation of the pump and the vacuum system. In case this constitutes a potential source of danger, take appropriate safety measures.

•Make sure ventilation is adequate if the pumping unit is installed in a housing or if ambient temperature is elevated. Provide external venting if necessary. Keep a distance of minimum 20cm between fan and ambient parts.

			page 19 of 61
		After switching off the pump, wait 60 sec. minimum until next switching on.
NOTICE
NOTICE		Avoid throttling losses by using connecting pipes with large diameter and keep them
		as short as possible.
		In case of perturbing exhaust noise connect an exhaust hose.
		Install outlet pipelines always falling to avoid backflow of condensate towards the pump.
		When assembling, ensure vacuum-tightness. After assembly, check the complete
		system for leaks.
		Secure hose connections at the pump appropriately against accidental detaching.
		The controller can only be operated with components which are compatible to the
		BUS system, e. g. optional coolant and venting valves.
			Pressure transducer of the controller:
			Pressure transducer of the controller:
			Max. permitted pressure at the pressure transducer: 1.5 bar
			(absolute).
	vacuum		The display flashes at a pressure higher than 1080 mbar.
	vacuum		Release pressure immediately. Risk of bursting!
	connection		Release pressure immediately. Risk of bursting!
	connection		Condensate and deposits in the pressure transducer af-
			Condensate and deposits in the pressure transducer af-
			fect the measuring result.
			Clean pressure transducer if necessary.

		4.3 Condensate cooler (accessory)

overpressure safety relief device

catchpot at the outlet

outlet (gas!; hose nozzle 10 mm)

(2)

(1)

Catchpot:

The round bottom flask is coated with a protective layer to prevent disintegration in case of breakage or implosion.

Assemble the catchpot using the joint clip.

Condensate cooler:

Assemble hose nozzles for coolant inlet (1) and coolant outlet (2) pipelines at the condensate cooler.

The condensate cooler enables an efficient condensation of the pumped vapors at the outlet.

No backflow of condensates.

Controlled recovery of condensates.

Next to 100% solvent recovery.

The isolation cover protects against glass splinters in case of breaking, acts as thermal isolation to avoid condensation of humidity and is intended to absorb shocks.

		Attach the pipelines of the coolant circuit to the respective hose nozzles (hose noz-
	NOTICE
	NOTICE	zles 6-8 mm, see image) at the waste vapor condenser. Check hose connections
		prior to starting operation of the cooling system.
		Secure coolant hoses at the hose nozzles (e.g. with hose clip) to prevent their ac-
		cidental slipping.

+ 42 hidden pages