Ariston ST45PE-VN User manual

GB Electric instant water heater
Bình đun nước nóng tức thời VN
ST45PE - VN
PHẠM VI SỬ DỤNG
MODEL SCOPE

Thank you for purchasing our instant water heater. Please read the instruction carefully
before use.
DESCRIPTION OF WATER HEATER
(See Fig.1)
13.Main PCB
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20.Flow sensor
14.Pump
16.Copper base
17.Inlet NTC
19.ELCB PCB
21.Outlet pipe
1.Front cover
2.LED screen
3.HMI panel
4.ELCB buttons
5.Setting buttons
6.Filter
7.Stop valve
8.Mounting Terminal
9.Hand shower
10.Adjustable shower holder
11.Slider ail
12.Flexible hose
18.Pump PCB
22.Terminal block
24.Outlet NTC
23.Zero sequence current transformer
25.Heater tank
26.Bottom cover
27.Thermostat
15.Triac PCB
28.Soap tray

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Possible failures and troubleshooting
Problem Screen
display
ELCB
lamp
(if any)
Heating
Iconchecking actions
OFF OFF OFF
1) Make sure power supplier is available, bychecking
house power supplyvoltage;
1) Make sure the water heater is turnedON, bypressing
ON/OFF button;
2)Make sure product is not in coldwater model (all 3
personal model icons off means that the product is in cold
water model)
3) Make sure water pipe connection is right (inlet on right,
outlet on left).
ON ON ON
1) Make sure the wate flow rate is not too big(over
6L/min), byreducingthe flow rate through water valve
regulation;
ON OFF OFF 1) Make sure the "test" button is not mistakenlypressed, b
y
pressingthe "reset" button.--only for models with ELCB.
display
"E*"
ON OFF 1) Stopto use water heater, call service technician.
/ Blinking/1) Stopto use water heater, call service technician.
1) Make sure temperature settingis not too small, by
choosinghigher temperature setting.
2)Make sure the wate flow rate is not too big(over
6L/min), byreducingthe flow rate through water valve
regulation;
ifflow rate too big, the outlet temperature indicatedon
screen duringheatingwill not be able to reach the setting
temperature.
3) Measuringthe actual voltage WHEN heatingto make
sure voltage dropnot too big.
Byincreasingsectional area of, or reducinglength ofthe
power supplycable couldimprove the problem.
4)Make sure power supplier voltage not too small, by
checkinghouse power supplyWITHOUT heating.
ON ON OFF
ON
Water cold, no
temp increase
(Flow rate
normal)
Water temp
increased, but
not warm
enough
ON ON

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Problem Screen
display
ELCB
lamp
(if any)
Heating
Iconchecking actions
1) Make sure the water pressure is bigenough to provide
youconfortable water flow rate.(for water heater without
pump, water tankshouldbe at least 3meters higher than
water heater)
2)Make sure there are no dirtyblocks the water flow, by
cleaningthe filter, which is built in the water valve.
3) Make sure there are no dirtyblocks the nozzles of
shower head.
4)Make sure there are no bottle neckBetween the water
inlet pipe andthe main water supplier point;
Triangle icon
blinking
///1) Checkifinlet temp higher than settingtemp.
house light
frickering
when heating
ON ON ON
1) Measuringthe actual voltage WHEN heatingto make
sure voltage dropnot too big. (voltage dropshouldbe less
than 10%).
Byincreasingsectional area of, or reducinglength ofthe
power supplycable couldsolve the flickeringproblem.
Flow rate too
small ///

TECHNICAL DATA
For technical characteristics, please refer to the appliance data plate.
WARNING
1. Products manufactured by us are safe when they are installed, used and maintained in accordance
with our instruction and recommendations. Always refer to this manual if you have any doubt.
2. The appliance must be earthed. Improper grounding could cause electrical shock.
3. If any of the follow conditions occur, immediately switch off the mains and contact to Ariston service
agent for repair. Never attempt to repair the unit yourself.
- ELCB and Heater lamps do not light up.
- The Heater begins to make an odd noise, smell or smoke.
- Water temperature cannot be controlled.
- The heater shower signs of a distinct change in performance.
- If found water leakage from inside.
4. When the shower is usedby someone such as child, elderlyperson, sickperson andphysically
handicapped person, the person concernedis kindlyrequestedto payattention andcheckthe shower
temperature by hand fromtime to time.User is advisedto test andadjust the water temperature
before using.
5. During lighting/thunder, switch off the electric supply in advance to protect the shower unit against
possible damage.
6. The earth continuityconductor ofthe electrical installation must be effectivelyconnectedto all exposed
metal parts of the appliance and services in the room, which the heater is to be installed to conform
to local regulations and ensure proper earthing/grounding for ELCB to be effective.
7. Shower head must be descaled regularly.
8. Do not switch on if there is a possibility that the water in the heater is frozen.
9. No control valve or fitting can be fitted to the water outlet.
10. User is advised to test and adjust the water temperature before bathing.
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Rated voltage
Rated power
Min.water pressure
Max.water pressure
Rated water pressure
Product code
Model description
xx
xx
xx
xx
xx
xx
xxxxxxxx

1. Installation must be carried out by qualified personnel and in compliance to
the local authority regulations.
2. This heater must be permanentlyconnectedto the direct main current supply.
The use of a plug and socket is not recommended.
3. For the correct size of wire conductor corresponding to different electrical
loading, please refer to table1.
4. This heater operates at a minimum water pressure of 30kPa and 20kPa for
without pump model and with pump model, respectively and at a maximum
water pressure of 380kPa.
5. This heater will not function if there is insufficient water flow to trigger the
flow switch.
7. The thermostat will automatically cut off the power supply if it has sensed
an abnormal rise in showering water temperature. Only qualified technicians
are allowed to reset the thermal cut-out built inside the appliance.
8. To avoid accidentally scalding, user is advised to operate the heater under
a water pressure above 30kPa at the inlet.
1. Select a suitable position in the bathroom.
Caution before
installation!
INSTALLATION INSTRUCTION
Install the
appliance
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6. The built-in ELCB will automatically cut off the power supply in case there
is a current leakage above 15mA. (ELCB model only.)
2. Remove the screw A-(fig. 2b) at the bottom of the unit and lift up the front
3. Mark the screw points of the heater base on the wall. The heater position
should be 1.5 meter from the bathroom floor.
4. Markthe screws points of the slider rail set beside the heater. It is
recommended the top of the portion is in same level with the top of the heater.
5. Use 6mm diameter drill and make the wall plug holes for heater and shower
accessory to 35mm depth.
6. Insert the wall plugs and mount the heater firmly in position with the screws
provided.
7. To mount shower accessory, remove the terminal cover from the mounting
terminal andscrew the mountingto position.Close the cover. Insert the shower
holder and soap tray into the slider rail. Mount the slider rail to the mounting
terminal and screw the second mounting to position. Close the cover.
cover and then unhook the two parts. Be careful not to break the hooks which
locate at the top of the front cove

*THE WATER INLET AND OUTLET MUST BE INSTALLED CORRECTLY;
OTHERWISE THE HEATER CAN NOT FUNCTION.
*DO NOT USE PLUMBING CEMENT ON CONNECTION. IF NECESSAY, USE
ONLY THREAD OR SEALING TAPE.
1. Connect the stop valve to the water inlet with rubber washer. Use correct
tools to tighten and be careful not to break the plastic nut.
2. Connect the incoming water piping end to the stop valve (1/2’’ BSP).
3. Connect the soft hose and hand shower to the outlet of the heater; be sure
to put in the rubber washer.
4. Hook the hand shower to the shower hanger and adjust to your ideal position.
IMPORTANT: the ‘Water Outlet’ can only be fitted to the soft hose
and hand shower set provided. NO CONTROL VALVE OR FITTING
CAN BE FITTED TO THE WATER OUTLET.
In the condition ofwithout power supply, turn on the water mains to drain out all
plumbing dirt and to fill up the heater tank. Check for any water leakage.
IMPORTANT: this step will prevent damage to the heating element.
Water
connection
Testing
connection
Electrical
connection
IMPORTANT WARNING
-This appliance must be EARTHED. Improper grounding could cause
electrical shock.
Additional electric switch should be far away from the water heater (out
of reach of shower spray).
-Remember to switch off at mains before carrying out any electrical work.
1. Use double coated flexible cable having nominal cross-sectional area which
could be seen in table 1.
2. lead the power cable from the circuit breaker to “ON/OFF” double bipolar
switch (which having a contact opening at least 3mm in all poles) outside the
bathroom, then lead a cable connected to terminal blockinside the unit(fig.3a).
3. Insert the cable through core hitch ‘A’ for side entry or hole ‘B’ below the
bottom cover for wall embedded cable (fig.3b).
4.Connect the cable to terminal block and fully tighten them as follow(Fig. 3b).
BROWN or RED for LIVE (L)
BLUE or BLACK for NEUTRAL(N)
GREEN or GREEN/YEOLLOW for EARTH(E)
5. Make sure the wiring connection is tight, then close the front cover.
6. Fix back the screw A.
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Starting IMPORTANT:
THE HEATER TANK MUST BE FILLED UP WITH WATER BEFORE TURN
ON THE ELECTRICITY SUPPLY THIS IS TO PREVENT ANY DRY BURNT
DAMAGE TO THE HEATING ELEMENT.
SHOULD TURN OFF THE HEATER BEFORE TURN OFF THE STOP VALVE.
OTHERWISE, IT WILL COME OUT A PERIOD OF HOT WATER IFRESTART
THE HEATER IN SHORT TIME, OR CAUSE CONFUSION ON OPERATION
LOGIC DUE TO SPECIAL DESIGN.
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The outlet temperature might be unstable ifthe inlet water pressure or the voltage
change sharply.
1. Turn on the water supplyandthe stopvalve, andthen wait until the water flow
through the hand shower.
2. Switch on the electrical supply and the ELCB lamp will light on.
3. Press the ON/OFF button, the heater will begin to workandhot water will come
out in a few seconds.Change the settingtemperature by press the “+”or “-”button,
the higher the temperature setting, the hotter is the shower.
4.Press the icon person 1/2/3, it will go to the related setting temperature. This
settingvalue will be memorizedeven ifpower off.
5. The outlet temperature may not be able to reach the setting temperature if
the incoming water supplyfromthe mains is too coldor the flow rate is too high.
In this case, you can reduce the water flow rate which will leadto increase the
outlet temperature, but it is still not necessarily able to reach the setting
temperature in case the water supply really cold.
6. The built-in ELCB will self-check every time when using the product.
7. The height and the direction of the shower holder are adjustable. Depress
the release button and slide the shower holder to the desired position. Move
the handshower to the desiredangle.Aratchet mechanismin the shower holder
will holds the hand shower in the selected position (fig.4).
8.Press the ON/OFF button to turn off the power, then turn off the water valve.
For pump model:
Long press ON/OFF button for 4 seconds, activate/deactivate pump function.

HMI Explanation
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ON/OFF button
Press this button to turn on/off the heater.
Temperature setting button Press “+” / “-” to increase/reduce the setting temperature.
ELCB lamp This lamp keeps on when ELCB function works properly, it will blink if detects current leakage.
Personal setting button Each button could remeber one setting temperature even if power off, to get the previous setting value by press the corresponding icon.
Inlet high temperature warning The triangle icon will blink and heater stops heating when the inlet temperature is higher than the setting temperature.
Temperature display Display the outlet temperature, or display the setting value during setting.
Heating icon This icon keeps on when it’s heating water