Kroll TK30 manual 

INSTRUCTION HANDBOOK
Dehumidier
Original manual
057614-21 / March 2020

TK30/TK60
2
CONTENTS PAGE
 1 Generalnotes 3
 2 Constructionandfunctionofthedehumidier 3
 3 Safety 4
 4 Generalsafetyinstructions 5
 5 Installationandtransport 6
 6 Electricalconnection 6
 7 Operation 7
 7.1 Commissioning 7
 7.2 Hygrostatcontrol 8
 7.3 Condensatedrain 8
 7.4 Automaticdefrosting 9
 8 Conditionsofoperation 9
 9 Troubleshooting 9
 10 Technicaldata 12
 11 Maintenance 13
 12 Wiringdiagram 14

3
1 GENERAL NOTES
You have purchased a KROLL dehumidier, a product of high quality. If, however, there should be compli-
cations, you will nd in the following some instructions how to x the problems as easily as possible.
ATTE NTION!
 Checkyourdehumidierfortransportdamagesrightatreceipt!Ifyoundanydamages,pleasein-
formthetruckdriverandnoteitonthedeliverynotebeforesigningit!
 Ifyoundadamageafterunpackingtheunit,pleasecontactimmediatelyyourresponsiblesalesman
orKROLLdealer.
 Pleasereadthismanualcarefullybeforeyoustartoperatingtheunitforthersttime.Thismakes
surethattheunitwillworkwithoutanyproblemsforalongtimeandsavesyouunnecessarycostsfor
repairingit.
 Iftheunitdoesnotworkproperly,switchitoandtakeothemainspluginordertoavoidthatitstarts
workingagainbyitself.
Please keep the carton box in order to be able to send back the unit safely in case of prob-
lems! You can simply rip the adhesive tape with a knife and fold the carton up.
2 CONSTRUCTION AND FUNCTION OF THE DEHUMIDIFIER
The TK dehumidier is exclusively designed for dehumidifying a closed room. The unit can prevent the
creation of condensation water, remove a too high air humidity or keep the air in the room at a constant
humidity level. The time the unit will need to dry the room and the degree of air humidity which can be
reached using the unit depend both on many factors in the room where the unit is placed.
The TK dehumidier works according to the condensation principle with heat recovery. The fan (see explo-
ded view) takes in the humid air through a cooling register (evaporator). Here, the air is cooled down below
its dew point so that the water vapour of the air condensates to water and ows into the water collecting
tank. The cooled and dried air is heated up again at the condenser. Due to the heat pump e󰀨ect, the outlet
air is some degrees warmer that the intaken air, which leads to an energy gain that can be three times the
electric power consumption. By the permanent circulation of the ambient air through the appliance, the
absolute humidity of the air is decreased continuously. The surplus humidity is taken away in a gentle and
e󰀩cient way.

TK30/TK60
4
3 SAFETY
The dehumidiers TK30/TK60 are equipped with safety devices. The units have been tested for safety.
Wrong use or misuse may cause damage to:
• the user,
• the dehumidier and other things in the same room,
• the e󰀩cient operation of the dehumidier.
All persons who are in charge of installation, commissioning, operation, maintenance and service of the
unit must
• be properly qualied,
• follow the manual’s instructions carefully.
Proper use
The dehumidiers must only be used in order to dry room air.
Dangers caused by accessories
Condensate hoses and air lters must be installed properly and must not put the safety devices out of
operation. The control elements must always be freely accessible.
Permitted users
The dehumidiers TK30/TK60 must only be operated by persons who have been authorized and trained
by the owner. The operator is responsible for third persons on site.
The responsibilities for the di󰀨erent actions at the unit must be clearly dened and be observed. Unclear
competences are a safety risk!
The owner must
• make the manual accessible for the operator
• make sure that the operator has read and understood the manual
ATTENTION!
The unit must not be used under the following conditions:
• In rooms with a potentially explosive atmosphere.
• In rooms with a potentially aggressive atmosphere (e.g. ammoniac, acetic acids etc.).
• In rooms with water of a pH-value of < 7,0 or > 7,4.
Note: With a pH-value of less than 7,0, there is the danger of corrosion for all metal parts and dama
ges for grout-containing substances. A pH-value of more than 7,4 will cause skin and mucosa irritations
and an increased creation of limescale.
• In rooms with a high concentration of solvents.
• In rooms with an extremely high concentration of dust.

5
4GENERALSAFETYINSTRUCTIONS
•Thisappliancecanbeusedbychildrenagedfrom8years
andaboveandpersonswith
reducedphysical,sensoryormentalcapabilitiesorlackof
experienceandknowledgeiftheyhavebeengivensupervi-
sionorinstructionconcerninguseoftheapplianceinasafe
wayandunderstandthehazardsinvolved.
•Childrenshallnotplaywiththeappliance.
•Cleaningandusermaintenanceshallnotbemadeby
childrenwithoutsupervision.
•Donotcovertheunitduringtheoperation.
•Theunitmustbeplacedinawaythattheaircancirculate
throughitfreely.Theairlterandthelamellasofthefront
panelmustbekeptfree.Keepafreespaceof1mfromthe
lamellasandthefrontpanel.
•Beforemovingtheunit,switchito󰀨bypushingtheON/
OFFswitch,takeo󰀨themainsplugandemptythedrippan!
•ProtectPowerCordfromDamage:Neveroperateaunit
withadamagedpowercord,asthismayleadtoelectricalor
rehazards.Ifthepowersupplycordisdamaged,itmustbe
replacedbyacordofthesametypeandamperagerating.

TK30/TK60
6
5 INSTALLATIONANDTRANSPORT
The dehumidiers TK are designed for mobile use. For installation and transport, please consider the
following points:
 The unit must be placed in a way that the air can circulate through it freely. The air lter and the lamellas
of the front panel must be kept free. Keep a free space of 1 m from the lamellas and the front panel.
 Before moving the unit, switch it o󰀨 by pushing the ON/OFF switch, take o󰀨 the mains plug and empty
the drip pan!
 The unit must only be moved by using its handle and wheels!
 The unit must be installed on a plane surface, otherwise it must be secured against rolling o󰀨.
 The unit may be transported in upright or horizontal position. If possible, upright transport is recommen-
ded!
 The unit must only be used for dehumidifying.
ATTE NTION!
Theunitmustnotbepulledaroundatthemainsplug!
6 ELECTRICALCONNECTION
Before connecting the unit to the mains supply, please check the following points:
 Is the mains voltage the same as the unit’s voltage?
 Are the mains socket and the mains power supply protected properly?
 In case of installation in a swimming hall: is the necessary ground fault circuit interrupter installed?
 If a cable drum is used, it must be unrolled completely.
 Is the unit’s mains plug suitable for the building’s mains socket?
 Does the building’s mains socket have a proper earthing?
ATTE NTION!
Beforecommissioningofthedehumidier,itstechnicaldatamustbecomparedwiththeconditionson
site!

7
7 OPE R ATIO N
7.1 COMMISSIONING
ATTE NTION!
Beforecommissioningtheunit,readthemanualcarefullyinordertoavoiddamagescausedbyimproper
operationorlocalconditions.
WARNING!
Firedanger/materialdamageandunitdamage!
TheunitTK30containstheeco-friendlybutammablerefrigerantR290.(TK60/R454C)
Keepnakedameandignitionsourcesawayfromtheunit.
In order to make the dehumidier run, please stick to the following steps:
 After any transport, the unit should stand still for about 15 minutes. During that time, the oil which has dis-
tributed into the cooling system and become foamy due to the transport will ow back into the compressor.
We recommend this in order to extend the cooling machine’s lifespan.
Put the mains plug into the mains socket.
Check if the drip pan is installed or if a hose for the evacuation of the condensation water is xed and ins-
talled properly.
 Turn on the unit using the ON/OFF switch. It is located at the right side panel of the unit and has to light red
when the unit is on.
Set the desired value of humidity at the hygrostat (see hygrostat control).
The unit will start automatically if the set value is lower than the actual degree of humidity in the room.
The unit will not start if the set value is higher than the actual degree of humidity in the room.
Signal lamp red = drip pan is full
ON/OFF switch
Hygrostat
Hours counter
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TK30/TK60
8
7.2HYGROSTATCONTROL
The dehumidier type TK is equipped with a hygrostat to set a desired value of air humidity. It is placed at
the rear of the unit, on the control panel. You can set the value using the at setting knob. The hygrostat
makes the dehumidier start when the air humidity in the room is higher than the set value.
When the air humidity in the room drops below the set value, the hygrostat stops the dehumidier.
The following operation options can be set via the hygrostat:
 The mark on the hygrostat points to position „Min“.
The unit is turned o󰀨, no dehumidication process.
 The mark on the hygrostat points to position „Med“.
The unit is dehumidifying.
It will stop when an air humidity of about 50 – 66 % has been
reached.
 The mark on the hygrostat points to „Max“.
The unit is dehumidifying.
A relative air humidity of up to 40 % can be reached.
ATTE NTION!
Themarksontheswellingcurveandtheindicatedhumidityvaluesintheprevioustextareonlyguide
values.Thehygrostatofthedehumidierandaneventualseparatehumiditysensor,placedsomewhere
intheroom,willprobablynotshowthesamevalues.Werecommendtochangethesettingsofthede-
humidieruntilthedesiredroomairhumidityhasbeenreached.
7.3CONDENSATEDRAIN
The dehumidiers type TK are equipped with a drip pan and connections for a 12 mm hose. If the unit is
run with a drip pan, it will automatically stop when the drip pan is full, and the red signal lamp on the side
panel will start lighting.
ATTE NTION!
Beforeyoutakeothefulldrippan,switchothedehumidier!Thisavoidscondensatewatertodropon
theooroftheroomthatyouwishtodry.
If a hose is used to evacuate the condensation water, please stick to the following steps:
 Take o󰀨 the drip pan.
 Fix the hose carefully at the discharge nozzle at the bottom side of the defrosting pan. Do it carefully,
without force!
 If possible, x the hose carefully with a hose clamp. Do it carefully, without force!
 Lead the hose out of the unit via the unit’s rear side.
ATTE NTION!
 Theendofthehosemustbepositionedlowerthanthebeginning(dischargenozzle)!
 Thehosemustnotbebended!
 Makesurethatnoobjectsarestandingonthehose!

9
7.4 AUTOMATICDEFROSTING
During the dehumidication process, ice may form at the evaporator. The amount of ice being created
depends on the local conditions in the room that you want to dry. The dehumidier is equipped with an au-
tomatic defrosting device. This makes sure that the unit will start defrosting itself automatically, depending
on the amount of ice. Defrosting will work as follows:
 The temperature sensor measures the situation at a critical position of the evaporator.
 It transfers the signal to the DryLogic which will then detect the necessity of defrosting and start defros-
ting. During defrosting, the compressor keeps on working, the fan does not work.
 After defrosting, the dehumidier will start its normal operation again automatically.
8 CONDITIONSOFOPERATION
The dehumidiers TK are suitable for operation on construction sites, in living buildings, in swimming halls, ga-
rages and warehouses. They will operate without any problems in a temperature range from +5° C to +32° C
at relative humidity of 50 % to 90 %.
Ifyouarenotsureifthedehumidiercanworkwithoutproblemonsiteduetolocalconditions,pleasecontact
KROLLoryoudealer.
If the dehumidier is operated under non suitable conditions, the warranty expires!
9 TROUBLESHOOTING
Problem Pos. Cause Solution
The unit shows no or only a
poor dehumidifying perfor-
mance.
1The ambient air humidity is
below 40 % relative humidity. Operating the dehumidier at these conditions is un-
economic. We recommend
to switch o󰀨 the unit. Hint:
Set the unit’s hygrostat to an
accessible value (e.g. 50 %)
so the dehumidier will turn
o󰀨 automatically in time.
2The air lter is strongly pol-
luted. The dehumidier does not receive enough air any more.
Clean the lter or replace it
by a new one. A polluted air
lter can damage the dehu-
midier in the long run. Hint:
Check the lter regularly.
3The ambient temperature is
below +5° C. Operating the dehumidier at these conditions is unecono-
mic. Switch o󰀨 the unit.
4There is some mistake in the
cooling circuit of the dehumi-
dier.
An authorized service center
has to repair the dehumidi-
er.

TK30/TK60
10
The automatic circuit breaker
of the building’s protection
fuse interrupts the mains
supply to the dehumidier.
5The building’s fuse protection
is too weak. The building’s fuse fuse protection has to be checked
and/or be changed.
6There is an electrical pro-
blem in the dehumidier’s
electric circuit.
The power supply of the de-
humidier must be interrup-
ted (pull o󰀨 the mains plug)!
The defect must be repaired
by an authorized service
center.
The unit’s fan is not working. 7The dehumidier is defros-
ting. The dehumidier will nor- mally start working again
automatically after a couple
of minutes. If not, take the
unit to an authorized service
center (do not try to repair it
by yourself!).
The noise level is louder than
usually. 8The lter holding device is not put on properly. Put on the lter holding de- vice properly.
9One or more screws of the
casing are not tightened
properly.
Tighten the loose screw(s)
properly.
The dehumidier is not
working. 10 The dehumidier is not swit- ched on. Switch the dehumidier on.
11 The degree of humidity set
at the hygrostat has been
reached.
The dehumidier will turn on
again automatically when
the degree of humidity set
on the hygrostat has been
exceeded.
12 The drip pan is full. Take o󰀨 the drip pan, empty
it and remount it.
13 The dehumidier is defective. An authorized service center
has to repair the defect.
The dehumidier creates
too much ice at the cooling
register (evaporator), a block
of ice is created.
14 The room temperature was/
is temporarily or always
below +30° C.
Put the dehumidier into a
room with at least +10° C
and wait until the ice has
completely defrosted. Then
switch the unit on and let it
run for about 3 hours. If ice is
created again, contact your
supplier. In general make
sure that the unit is only used
in rooms with at least +5° C
room temperature. Ice may
also be created if the unit is
stored in a colder room and
then switched on immedia-
tely.
15 Maybe the automatic defros-
ting is defective. Contact your supplier.