Lauda Hydro H 4 User manual

Operating Instructions
Hydro Water Baths
H 4, H 8,H 16,H 22, H 24, H 41, H 8 A, H16 A

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The product range of incubation and inactivation baths comprises eight models with six different sizes, ranging from 4 to 41
litres contents.Water Baths H 8 AandH 16 A are equipped with a circulation system, ensuring an optimum spatial temper-
ature distribution.
The outer housing is made ofelectrolytically galvanised and powder-coatedsheet steel; all other constructive parts of the
housing and the heating element are madeof stainless steel.
Three timer functions of the electronic controller permit regulation of the water temperature in the Water Bath. The con-
troller is equipped with an electronic performance check with visual and acoustic alarms in case of a malfunction. Further-
more, theWater Baths are protected in caseof dry running of the heating element.
Before installation, please check whether contents of package are in good order and complete.
Should younote any damages or have anyreasons for complaint, please contact your supplier or directly.
LAUDA-GFL Gesellschaft für Labortechnik mbH
Schulze-Delitzsch-Str. 4+5
30938 Burgwedel - Germany
Telefon: [phone]
Fax: [phone]
E-Mail: [e-mail]
Internet: www.GFL.de

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Contents
1 Use of the Water Bath...........................................................................................................................................................7
Intended Use...................................................................................................................................................................................7 1.1
Improper Use..................................................................................................................................................................................7 1.2
2 Warranty................................................................................................................................................................................7
3 Before Installation / Initiation...............................................................................................................................................8
4 Transport,Setup and Location ofthe Water Baths...............................................................................................................8
5 Operating Voltage.................................................................................................................................................................9
6 Filling water into the Water Bath..........................................................................................................................................9
7 Adjustable Water Level Regulator (AccessoryOrder-No. A000024)............................................................................ 10
8 FunctionalDescriptionandInitiation.................................................................................................................................10
Main Menu....................................................................................................................................................................................11 8.1
8.1.1 Setting the required temperature....................................................................................................................................12
8.1.2 Setting the switch-on delay..............................................................................................................................................12
8.1.3 Setting the operation time of Water Bathheating........................................................................................................13
Switching to menu basic settings...............................................................................................................................................13 8.2
8.2.1 Limitation ofthe max. or min. possibletemperature set points in two separate input windows............................15
8.2.2 Setting the trigger points for over- and under-temperature alarms in two separate input windows...................15
8.2.3 Switching between temperature display °C and °F.......................................................................................................16
8.2.4 Start options of the process duration..............................................................................................................................17
8.2.5 Adjusting the actual temperature at a certain set point temperature........................................................................17
8.2.6 Switching back to the main menu....................................................................................................................................18
Display of current process data.................................................................................................................................................18 8.3
Function control with visual and acoustic alarms....................................................................................................................19 8.4
9 Water Circulation (onlyWater Baths models H 8A und Typ H16 A)............................................................................20
10 Maintenance and Support..................................................................................................................................................20
Exchangingthe internal unit fuses.............................................................................................................................................20 10.1
Low water cut-off.........................................................................................................................................................................21 10.2
Under-temperature alarm..........................................................................................................................................................21 10.3
Over-temperature alarm............................................................................................................................................................22 10.4
Temperature sensor is interrupted............................................................................................................................................22 10.5
Temperature sensor has short circuit........................................................................................................................................22 10.6
RemovingLime Deposits, Cleaning and Maintenance..........................................................................................................23 10.7
10.7.1 Descaling..............................................................................................................................................................................23
10.7.2 Cleaning and Maintenance................................................................................................................................................23
10.7.3 Decontamination.................................................................................................................................................................23

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11 Disposal of Old Units..........................................................................................................................................................24
12 TechnicalData.....................................................................................................................................................................25
13 Circuit diagram....................................................................................................................................................................26
14 Examples for connection tothe mains supply....................................................................................................................27
Electrical fuses.............................................................................................................................................................................27 14.1
Examples for connection to the mains....................................................................................................................................28 14.2
15 Spare Parts List...................................................................................................................................................................29
16 Accessories..........................................................................................................................................................................31

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1 Use of the Water Bath
Intended Use 1.1
LAUDA Hydro Water Baths are used toheat up tap water in a temperature range of approx. 5 K above ambi-
ent to 100°C (models H 4 to H 41) and from approx. 10 K above ambient to 100°C (models H 8 A and H
16 A)for temperature-controlled warming of different media in laboratory vessels of different shapes.
The information contained in these operating instructions must by all means beread and observed. Only then cana per-
fect operation ofthe Water Bath be guaranteed. The units may only be installed and operated by persons who have made
themselves familiar with these operating instructions.
Caution:
Hot surfaces at temperaturesabove 50 °C. Danger of burns, and danger of scaldings through
steam released when opening the lidof the Water Bath. It is recommended to wear suitable
safety gloves
Caution:
Increased risk of injury! Uncontrolled closing of theWater Bath lidcarries a high risk of injury. Protect
yourself by working carefully onWater Baths with open lid.
Improper Use 1.2
Use the Water Bath with tap water only. Other media, e. g.oils or acids, will lead to damages and, possibly, total unit fail-
ure. Neitheraggressive nor corrosive waters may be used as athermostating liquid.
The Water Bath may not be used in laboratory areas with aggressive or corrosive ambient conditions. It is not permissible
to heat up or vaporise aggressive media,e. g. hydrochloric acid, in the unit itself or in its vicinity.
The temperature work must not create an explosive atmosphere in the vicinityof the unit.
The Water Bath may not be operated in potentially explosive surroundings.
LAUDA Hydro Water Baths are not suitable for direct temperature work of foodstuffs, beverages and tobacco or for
medical-technical and pharmaceutical products. Direct temperature work means unprotected contact of thesubstances
with the Water Bath filling.
LAUDA Hydro Water Baths,operated ina laboratory, are no MedicalDevices. Theyneither fall under national nor inter-
national MedicalDevice Directives nor have to be used and applied accordingly.
2 Warranty
For all laboratory apparatus and their accessories fromLAUDA-GFL Gesellschaft für Labortechnik mbH, there is a war-
ranty claim, as well for spare parts, repairs and modifications, carriedout by LAUDA-GFL. In order to identify defective
units, we require both model and serial number on the nameplate at the back, left-handside of the Water Bath and, if
applicable, a copy of the invoice.

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3 Before Installation / Initiation
The information given in the present manual must by all means be carefullyread and observed. Only then cana perfect
functioning ofthe Shaking Water Bath be guaranteed.
Safety precautions are additionally markedwith the followingsymbols.
Read and observe the
operating instructions
Warning of hot liquids
and vapour Warning of hot surfaces Warning of hand injuries
Warning of
dangerous
electrical voltage
General
warning Before maintenance and repair disconnect the unit all-pole from
the electrical mains (pull the plug
from the socket).
4 Transport, Setup and Location ofthe Water Baths
Protect yourself and the unit during transport and setupby working carefully and avoid danger of e. g.
shifting or tilting the unit as well as risk of injury by liftingheavyloads.
Caution, Water Bath TypH 41 has a net weight of 21.2kg and must be lifted, carried and transported to the location by
at least two persons.
The Water Bath can be held between the four stands of the unit and lifted for setup. Place on solid, even and level surfaces
inside buildings only. Makesure to place the unit only on a watertight, temperature-resistant, non-flammable surface. The
location must provide sufficient space as well as the necessary carrying capacity for the unit (unit weight as per technical
data, chapter 12 ofthis manual plus weightof the filling.

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5 Operating Voltage
The Water Bath must be connected to a correctly installed shock-proofsocket. TheWater Bath
is a protection class I electrical appliance, a connection to theearth conductor (PE) must be
ensured. For informationon the required mains fuse please view Technical Data, chapter 12 of
this manual.Further reference for connection to the mains can be found in chapter 14 of this
manual.
The electrical connection must ensure an all-pole separation from the mains at any time. The mains
connection cable must nottouch any hotsurfaces of the unit. It may not lead underneaththe unit.
The main switch of the Water Bath must beoff (position O).The voltage on the nameplate (at the
back of the unit) must be identical to the mains voltage. If they are identical, connect the unit to the
mains.
6 Filling water into the Water Bath
Use the Water Bath only with tap water. Even stainless steel will corrode when used improperly. Use nei-
ther ferruginous nor chlorous water, in order to prevent rust formation and pitting. Using distilled or deion-
ised water will also ultimately lead to corrosion in the Water Bath and must, therefore, be avoided.
Media, such as oil, acid, or other additives, not approved byLAUDA-GFL, to prevent bacteria contamina-
tion (chlorine or copper sulphate), may lead to damages to theWater Bath basin, the screw connections of the ducts and
the heating element. Such damages are not covered by guarantee.
Before initiation, the Water Bath must be filled with water. For maximum filling quantities please refer to theTechnical
Data, chapter 12 of this manual. Make sure that the drain cock at the back of the unit is locked (handle must be ina 90°
angle to the drain cock).Open the lid of the unit and fill in water at least upto the marking "min" (approx. 50 mm above
the perforated floor) and not exceeding the marking "max" (approx. 50mm below the upper bath rim).

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7 Adjustable Water Level Regulator (Accessory Order-No. A000024)
The adjustable water regulator at the back of the Water Bathserves to level out the loss of water due to evaporation during
operation, thus maintaining the set water level. Furthermore, the adjustable water regulator allows theWater Bath to be
operated attemperatures below ambient, with aminimum of approx. 3 K above tap watertemperature.
Before initiation, the water regulator must be connected to thewater mains.The upper hose connection of the water
regulator is the water supply. Using a laboratory hose with an inner diameter of max 9 mm, connect this to the water
mains. The lower hose connection is the overflow of the waterregulator. Connect a laboratory hose (inner diameter of max
9 mm) and leadit into a drainon a lower level, ensuring free flow of the water without it being banked up.
Secure all hose connections with hose clips.
The required water level can be adjusted with the outlet tube ofthe
water regulator. First loosen thescrew connection of the outlet tube,
using a spanner GW 27. Set the required water level by pulling out or
pushing in the tube in the regulator. Then retighten thescrew con-
nection. Nowopen the tap of the mains supply slightly and fill water
into theWater Bath, as described in chapter 6.
8 Functional Description and Initiation
The electronic regulator controls the water temperature ofthe Water Bath. Three timer functions
permit switch-on delay as well as setting the duration ofthe operation time. A high-contrast 3.5"
TFT displayshows all set points and operational values. These can be controlled with four mem-
brane keys, situated to the rightof the display. The controller isequipped with an electronicmoni-
toring function with visual and acoustic alarms in case of a malfunction. Additionally, the Water
Bath is protected from overheating through running dry by a low water cut-offthat is also moni-
tored by the function control of the regulator. After switching on the mainswitch of the Water
Bath, the green pilot lamp inthe switch will light up.The displayfirst shows thestartup screen, and
then the mainmenu. The four membrane keys to the right of the display allow access to all menu
functions, setting and confirming process values.
Key ①to reduce process values and to switch
between menu functions. Key ②to increase process values and to switch between menu functions.
Key ③to open and close input windows, con-
firm set process values andto leave sub-
menus.
Key ④to startand stop processes.