THERMEx HIT O Series User manual

Electric storage water heater
EN
User manual
Elektrický ohřívač vody
CZ
Návod k použití
Elektrické zásobníkové ohrievače vody
SK
Návod na použitie

Electric storage water heaters
Before the first using your electric storage water heater, carefully read
this operation manual and pay special attention to paragraphs marked
with "ATTENTION" symbol.
DEAR CLIENT!
Thank you for your purchasing "THERMEX" electric water heater.
Electric water heaters are designed and manufactured in strict compliance with
international standards that ensure reliability and safe operation.
The present manual covers models HIT_О and HIT_U. Model ofyourwaterheateris
indicatedinsection"Product warranty"andonthenameplateattached totheheatercase.
APPLICATION
Electric water heater (here in after EWH) is designed to provide with hot water for
welfare and industrial facilities that have cold water supply main with appropriate
characteristics. EWH shall be operated in closed heated spaces and is not designed for
continuous flowing mode.
MAIN TECHNICAL CHARACTERISTICS
Maximum cold water line pressure –0.8 MPa.
Minimum cold water line pressure –0.05 MPa.
Power supply parameters - single-phase, voltage 230 V ± 10% and frequency 50 Hz ± 1%.
Tubular heating element (THE) power - 1,5 KW.
Threaddiameterofhotandcoldwaterconnectingpipes -1/2".
Heater protection class -IPX4.
Volume, (l)
Heating time for
ΔТ = 45°C, (1,5 KW)
Dimensions (width, height, depth) mm
HIT_O
HIT_U
10
20 m
366 x 345 x 304
366 x 345 x 304
15
30 m
406 x 385 x 335
406 x 385 x 335
30
1 h 05 m
476 x 455 x 408
476 x 455 x 408
SCOPE OF SUPPLY
Water heater...............................................................................................1 pcs.
Safety valve of GP type..............................................................................1 pcs.
Operation manual.......................................................................................1 pcs.
Packaging ..................................................................................................1 pcs.
EWH installation kit.....................................................................................1 pcs.
EN

Figures 1 - 2:
1 - THE, 2 - Hot water outlet pipe, 3 - Cold water inlet pipe, 4 - Drain valve, 5 - Relief
valve, 6 - Drainage in the sewers, 7 –Supply line, 8 - Shut off valve during EWH operation,
9 - Cold water main pipe, 10 - Hot water main pipe, 11 - Cut-off valve, 12 - Protective
cover.

DESCRIPTION AND PRINCIPLE OF OPERATION
EWH consists of the housing, removable flange, safety valve and protective cover.
The outer casing of EWH consists of steel tank heat insulated with impact-resistant
plastic and two threaded pipes for cold water inlet (with blue ring) and hot water outlet
(with red ring).
Inner tank has a special bio-glass-porcelain coating reliably protecting the inner surface
against chemical corrosion.
Tubular heating element (here in after THE), thermostat and magnesium anode are
mounted on the removable flange.
THE is used to heat water and thermostat provides with possibility of heating
temperature regulation up to +75°С. Water temperature adjustment in the inner tank is
made by thermostat control unit, located on the protective cover of the water heater. The
thermostat also has temperature switch - safety-protection device against EWH
overheating, which disconnects THE from power supply when water temperature exceeds
95°С. (In the course of operation EWH casing can heat).
In models НIT_О and HIT_U EWH power switch is mounted on the protective cover.
Near there are two signal lamps «Power» and «Heating». Signal lamp «Power» is lit when
EWH turning on. Signal lamp «Heating» is lit when water heating and turns off when
reaching the set temperature. Magnesium anode is designed to neutralize effects of
electrochemical corrosion on the inner tank.
Relief valve performs functions of return valve, preventing the ingress of water from
water heater into water supply in cases of pressure drop in the latter and in cases of
pressure increase in the tank when strong heating of water, as well as function of safety
valve, relieving excess pressure in the tank when strong heating of water. During water
heater operation water may leak out of the exhaust outlet pipe of the safety valve to relieve
excessive pressure, which is made for the purpose of water heater safety. This outlet pipe
shall remain open to the atmosphere and be installed constantly down and in a non-
freezing environment.
Drainage of water from the safety valve exhaust pipe into the drain shall be provided
with installation of the corresponding EWH drainage.
It is required regularly (at least once a month) to discharge a small amount of water
through the exhaust pipe of the safety valve into the drain to remove lime deposits and to
test the operating functionality of the valve. Handle is intended to open the valve. It is
necessary to control when operating water heater this handle to be in position closing
water draining from the tank.

SPECIFYING SECURITY MEASURES
Electrical safety and corrosion protection of EWH are guaranteed only if there is an
effective earthing in accordance with applicable electric installation rules and regulations.
When installing and operating EWH the following is not allowed:
•TopowerEWHifEWHisnotfilledwithwater.
•Toremovetheprotectivecoverwhenthepowerison.
•UseEWHwithoutgrounding.
•ToconnectEWHtowatersupplywithpressureexceeding0.8MPa.
•ToconnectEWHtothewatersupplywithoutsafetyvalve.
•TodrainwaterfromEWHwithpowerswitchedon.
•Tousesparepartsnotrecommendedbythemanufacturer.
•TousewaterfromtheEWHforcooking.
•Tousewatercontainingimpurities(sand,smallstones),whichmightleadtoEWHand
safety valvebreakdown.
•TomodifydesignandinstallationdimensionsofEWHbrackets..
Attention should be paid to children so that they do not play with EWH. EWH is
not intended for use by persons (including children) with limited physical, sensory
or mental capabilities, or by persons who do not know how to use the EWH, except
for cases when this happens under the supervision or instructions by persons
responsible for safety of the EWH.
INSTALLATION AND CONNECTION
All installation, plumbing and electrical works must be performed by qualified
personnel entitled to carry out relevant works.
ARRANGEMENT AND INSTALLATION
EWH installation shall be performed in accordance with marking on the housing and
the following table:
Labeling
Volume
Arrangement
HIT_O
10 - 30 l
O –vertical, pipes down
HIT_U
U –vertical, pipes up
It is recommended to install EWH as close as possible to the place of hot water using
to reduce heat loss in the pipes.

When drilling (making) holes in the wall, regard is to be had to cables,
ducts and pipes in the wall. When choosing the place of installation total
weight of EWH filled with water shall be taken into account. Walls and
floor with low carrying capacity should be strengthened accordingly.
AllmodelsHIT_0,HIT_UaresuppliedwithEWHmountingkit.Thekitconsistsofaspecial
bracket and anchors. The bracket shall be secured to the wall using anchors and then install
EWHthereon.
To perform maintenance and servicing of EWH the distance from the protective cover to
the nearest surfaceinthedirectionofremovableflangeaxisshallbeatleast0.5m.
In orderto avoid damage ofthe user's and/or thirdparties' propertyin the event ofa
faulty hot water system, it is required to install EWH in spaces with waterproofing
and drainage to the sewers, and in no case to place under items exposed to the water
under EWH. When placed in unprotected areas a protective plate (not supplied) with
drainageintosewersshallbeinstalled under theEWH.
In case of placing EWH in hard-to-reach places in order to perform maintenance and
warrantyservice (mezzaninefloors,niches,ceilingvoids,etc.),installationanddismantlingof
EWHiscarriedoutbythe useronhisownorforhisownaccount.
CONNECTION TO WATER SUPPLY
Cold water shall be supplied to EWH using standard domestic water filter (for
example, mud trapandbowlfilter).
Install pressure relief valve at the cold water inlet tube with the blue ring, with 3.5-4
revolution, ensuring junction tightness with any sealing material (flax, FUM tape, etc.).
Connection to water supply system shall be made in accordance with Figure 2 for model
HIT_U (pipes up) and in accordance with Figure 1 - for models HIT_0 using copper, plastic
pipes or special flexible sanitary-engineering piping. Do not use used flexible pipes. When
mounting excessive efforts are not allowed to avoid damage to EWH pipes, bioglass
porcelaneousinnertankcoating.
After having connected open the EWH cold water inlet valve and hot water faucet
mixer. When complete filling of EWH, water will constantly flow from tap faucet. Close the
hot water tap on faucet mixer.
When connecting EWH in places not provided with water mains it is allowed to supply
water to EWH from auxiliary tank usingpumpingstation, orfromthetank placed at aheightof
notlessthan5meters fromthetopofEWH.
Note: for ease of maintenance during EWH operation it is recommended to install drain
valve(4)(not inthescopeofEWHsupply)inaccordancewiththedrawing.Ifwaterpressurein
the main exceeds 0.8 MPa, at the inlet before the safety valve it is required to install relevant
reducingvalve(notinthescope of EWHsupply).

CONNECTION TO POWER SUPPLY
Before switching on power supply, make sure that EWH is filled with water!
Before connecting of water heater to power supply, make sure that its settings
correspond to specifications of the heater.
Water heater shall be earthed to ensure its safe operation.
Power outlet shall have grounding contact with earthing wire and be in a place
protected from moisture, or meet requirements not less than IPX4.
OPERATION AND MAINTENANCE
OPERATION
In the course of EWH operation user can adjust heating water temperature using
temperature adjustment knob located on the protective cover.
When water temperature exceeds the value of the +95° C temperature switch is
actuated shutting down the EWH.To bring device back into operation, press until clicking the
releasepinundertheEWH protectivecover.
The indicator lamp indicates EWH modes on and off in the course of operation.
MAINTENANCE
Maintenance and timely replacement of magnesium anode are obligatory conditions for
long-term operation of EWH. Failure to comply with these requirements is grounds for
release from the warranty service. Maintenance and replacement of magnesium anode are
not part of the warranty of the manufacturer.
When performing maintenance condition of magnesium anode and scale on TÈH are
checked. At the same time residue that may accumulate in the bottom of the EWH is
removed.
Magnesium anode must be replaced at least once in 2 years. If water contains high
levels of chemical contaminants, the magnesium anode must be replaced more often.
Scaling at THE can result in its malfunction, that is not a warranty case, and its replacement
is not included in the warranty of the manufacturer and the seller. If there is scale on THE,
then it can be removed by using scale removing means or mechanically. When removing
residuals from EWH do not apply excessive force and do not use abrasive cleaners not to
damage the protective coating of the inner tank.
Importance of the first maintenance is that by intensity of scale and residues,
magnesium anode consumption terms for next maintenance services can be decided and,
consequently, service life can be extended. In case of non-observance of the above
requirements EWH service life reduces, increases the probability of EWH breakdown and
validity of warranty expires.

To perform maintenance and replace magnesium anode follow steps:
TurnoffEWHpower.
Coolhotwaterordischargeitthroughthemixer.
CutoffsupplyofcoldwaterintoEWH.
Putarubberhoseonthecoldwatersupplyinletpipeordischargevalveand
directthesecondend to thedrain.
Unscrewthereliefvalveoropendrainvalve.
OpenahotwaterfaucetonthemixeranddrainwaterfromEWH.
Remove the protective cover, disconnect wires, unscrew and remove from the
casing the removable flange.
Replacethemagnesiumanode,cleantheTHEifnecessaryfromscaleand
removeresidue.
Toassemble,fillEWHwithwaterandpoweron.
When conducting EWH maintenance by forces of special organization the appropriate
mark shall be made in the warranty card. When replacing the magnesium anode
independently by the consumer magnesium anode purchase receipt shall be attached to
present manual.
POSSIBLE FAULTS AND REMEDIES
Fault
Possible cause
How to fix
Hot water pressure
from EWH decreased.
Cold water pressure
keeps at the level.
Clogged inlet safety valve
Remove the valve and clean it in
water
Heating time
increased
THE is covered with a layer
of sludge
Remove the flange and clean
the THE
Supply voltage decreased
Contact power main operation
service
Frequent tripping of
thermal switch
The set temperature is
close to the limit
Turn the thermostat control to
decrease temperature (-)
Thermostat tube is covered
with sludge
Remove the flange and gently
clean the pipe from the sludge

Powered EWH does
not heat water. No
backlights of indicator
lamps.
Thermal switch tripped or
not on.
Disconnect EWH from the
mains, remove EWH protective
cover, press the safety button
until you hear a click, place the
cover and turn on power.
These faults are not defects of EWH and shall be fixed by the consumer or by a
specialized organization at his own expense.
DISPOSAL
When complying with the rules of EWH installation, operation and maintenance and
when water quality complying with current standard the manufacturer sets EWH lifespan of 9
years.
When disposing of the EWH comply with local environmental laws and guidelines.
The manufacturer reserves the right to make changes to the design and specifications
of the heater without prior notice.
MANUFACTURER'S WARRANTY
The manufacturer sets 2 years as the period of warranty for water heater, and warranty
period for parts and components is as follows:
for water containing tank (inner tank) – 5 years;
for other components (heating element, thermostat, indicator lights, gaskets,
temperature indicator, pressure relief valve) – 2 years.
The warranty period is calculated from the date of EWH sale. If there is no or corrected
date of sale and shop stamp, the warranty period is calculated from the date of EWH
manufacture. Claims within the warranty period are accepted only on presentation of the
warranty card with marks of the seller, and the identification plate on the casing of the EWH.
EWH serial number consists of thirteen digits. The third and fourth digits of the serial number
are year of manufacture, the fifth and sixth digits - month of release, the seventh and eighth
digits - day of EWH release. Claims within the warranty period are accepted only on
presentation of the guarantee card with marks of the seller, and the identification plate on the
casing of the EWH.
The warranty shall apply to EWH only. Malfunction of relief valve or power line cord
shall not entail replacement of EWH. Responsibility for compliance with principles of
installation and connection shall be borne by the buyer (in case of connection by his own) or
by the installer carrying out connection.
Recurring maintenance and timely replacement of magnesium anode are compulsory
conditions for long operation of EWH and survival of warranty obligations of the
manufacturer.
The first replacement of magnesium anode shall be not later than 25 months from the
date of EWH installation (in case of no mark of installation in warranty certificate with the seal
in installation company, the term is calculated from the date of manufacture). Later