Elba ACQUA Series User manual

INSTANT WATER HEATER
MODEL: ACQUA SERIES
EWH-K3420(SW)
EWH-K3420(GB)
Owner’s Manual
Please read this manual carefully before operating
your set. Retain it for future reference. Record
model number and serial number of the set. See the
label attached on the set and quote this Information
to your dealer when you require service.
For The Warranty Terms & Conditions, Please Refer To Warranty Certificate.
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Thank you for purchasing ELBA Instant Water Heater.
Please read this manual thoroughly and understand the content before use.
SAFETY PRECAUTION
1. Do not install the INLET & OUTLET and Stop Valve of the heater wrongly.
2. Do not install the heater where there is consistent spray directly over the unit.
3.
Do not connect the OUTLET to any tap or fitting that is not recommended by the manufacturer.
4. Do not block the heater OUTLET in any way.
5. Do not attempt to repair the heater without a qualified technician.
6. This appliance is not intended for use by person (including children) with reduced physical,
sensory or mental capabilities, or lack of experience and knowledge, unless they have been
supervision or instruction concerning the use of the appliance by a person responsible for
their safety.
7. Children should be supervised to ensure that they do not play with the appliance.
8. Engage a qualified electrician for installation.
9. Test water temperature with hand before using the shower.
10. Check the ELCB once a month (please refer to the Test Run of Heater) and consult professional
for repair if there is any malfunction.
11. Metallic / chrome flexible hose and conductive control valve shall not be used.
12. Use only new hoses to connect the appliance to the water supply. The old hose-sets should
not be reused.
13. This appliance is not to be used as a portable water supply.
14. The water inlet of this appliance shall not be connected to inletwater obtained from any other
water heating system.
15. Do not leave the hand shower idle in the pail. (refer below)

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1. WATER HEATER PARTS IDENTIFICATION
EXTERNAL PARTS IDENTIFICATION
INTERNAL PARTS IDENTIFICATION
Heater LED (Red)
Power LED (Green)
Stop Valve (INLET)
Test & Reset Button
Temperature Control Knob
Front Cover
ABS Heater Base
ELCB Control Board
LED Display Board
Thermal Cut Out
Heater Tank
Water OUTLET Connection
Water INLET Connection
Test & Reset PCB
Triac
Flow Sensor Assembly
Heater Control Unit
Terminal Block
Cable Entry
Electrical cable
(Recommended conductor size:
4.0mm2not included)

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2. GENERAL INFORMATION
CAUTION:
THIS APPLIANCE MUST BE EARTHED
INSTALLATION
1. All plumbing work should be completed before proceeding to electrical wiring connection.
(Table 1)
2. Installation must be carried out by a qualified electrician with close reference to this manual
and in compliance with the local regulations.
3. The unit works at a minimum water flow rate of 2.0 litre/min, which then would trigger the
built-in pump (only for pump model), boostering a stronger shower spray.
4. The built-in electronic Earth Leakage Circuit Breaker (ELCB) would cut-off the power supply to
heater in the event of a current leakage as low as 15mA.
5. The Thermal Cut-Off would automatically shut off the power supply shall there be any
abnormal rise of showering temperature.
6. The unit only operates when there is sufficient water flow to trigger the flow switch.
7. Electrical loading Table 1:
Voltage
(Vac)
Power
(kW)
Amperes
(A)
Recommended Conductor Size (csa) Fuse/MCB
(A)
ON/OFF
Switch (A)
mm2 Conduit
Cable
Flexible
Cable
220 –
50/60Hz
3.5 16.0 2.5 7/0.67mm 50/0.25 20 20
4.5 20.5 2.5 7/0.67mm 56/0.30 25 25
5.5 25.0 4.0 7/0.85mm 56/0.30 32 32
6.0 27.3 4.0 7/0.85mm 56/0.30 32 32
6.5 29.6 4.0 7/0.85mm 84/0.30 32 32
7.5 34.1 6.0 7/1.04mm 84/0.30 40 40
8.0 36.4 6.0 7/1.04mm 84/0.30 40 40
230 –
50/60Hz
3.5 15.2 2.5 7/0.67mm 50/0.25 20 20
5.5 24.0 4.0 7/0.85mm 56/0.30 32 32
6.6 28.7 4.0 7/0.85mm 56/0.30 32 32
8.8 28.3 6.0 7/1.04mm 84/0.30 40 40
240 –
50/60Hz
3.6 15.0 4.0 7/0.67mm 50/0.25 32 20
3.8 16.3 4.0 7/0.67mm 50/0.25 32 20
4.2 17.5 4.0 7/0.67mm 50/0.25 32 20
7.7 32.1 6.0 7/1.04mm 84/0.30 40 40
9.0 37.5 6.0 7/1.04mm 84/0.30 40 40

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8. Instantaneous water heater shall be equipped with a 2-pole control switch and its own
residual current device.
9. Water heaters exceeding 3kW shall be permanently connected to a 20A/30A rated circuit
breaker/fuse with an isolator switch and residual current device.
Diagram 3
3. INSTALLATION PROCEDURES
1. All the plumbing works should be completed before
proceeding to electrical wiring connection.
2. INLET and OUTLET connection of the heater unit
should not be reversed, with stop valve installed
on INLET. (Diagram 1).
3. It is recommended to mount the unit at 1.5mm
above the floor to bottom of the heater.
4. Mounting position (Refer Diagram 2).
• Remove screw from the bottom of the heater
• Lift the plastic cover upward
• Mark mounting position on the wall for all
4 screws
• Drill the holes with 5.0mm diameter drill bit
(Refer Diagram 3)
• Install the unitto the wall with plug
5. Installation of Heater INLET and OUTLET connection.
a) Connect the stop valve to INLET, and be sure
to put a gasket to prevent water leakage.
b) Connect the piping from the stop valve to
incoming water supply. If necessary make use
of sealing tape
for the connection to prevent water leakage.
c) Connect flexible hose to heater OUTLET.
Turn on the water mains to drain out all the
plumbing dirt and fill up the heater tank.
Then, connect the flexible hose to the hand
shower.
Floor
Stop Valve
1.5m
Diagram 1
Diagram 2
Lift upward
OUTLET
INLET

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(Note: This step will prevent damage to the heating element).
SAFETY PRECAUTION
Do not install reverse INLET and OUTLET of heater
INLET
OUTLET
OUTLET
OUTLET
correct installation inlet - outlet reverse
(wrong installation)
stop valve reverse
(wrong installation)
INLET
Stop
Valve Stop
Valve
Stop
Valve
INLET
6. Electrical Connection
a) Insert electrical cable through the rubber grommet as shown.
b) Connect the cable to the terminal block and fully tighten them
as the following:-
• Red or Brown ……………………………….……… Live (L)
• Black or Blue.…………………………………… Neutral (N)
• Green or Green/Yellow……………………………Earth
c) Restore the cover and secure screw at the bottom. ( Diagram 4)
d) Align the knob from ‘ON’ position in clockwise direction to ‘MAX’
and return to ‘OFF’ mark as shown. (Diagram 5)
Diagram 5
Diagram 4
Restore cover

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Test Run of Heater
a) Turn on the stop valve and water should spray out from the head.
b) Switch on the main power supply (‘POWER’ LED would light up).
c) Turn on the Temperature Control and ‘HEATER’ LED would light up. The water should
be warmed in few seconds.
d)Test the ELCB by pressing ‘TEST’ Knob switch. The unit should be tripped. ‘POWER’ and
‘HEATER’ LEDs would light off.
e)Press ‘RESET’ switch. The unit should resume to normal condition.
f)The heater is now ready for use.
1. Switch on the main power supply, the ‘POWER’ LED would light up.
2. Turn on the water supply at the stop valve.
3. Turn on the Temperature Control Knob. The ‘HEATER’ LED would light up and the water
temperature will be increased accordingly as the knob is turned clockwise from ‘ON’ to ‘MAX’.
4. For normal cold shower, just turn the Temperature Control Knob to ‘OFF’ position.
5. Switch off the power supply when not in use.
4. OPERATION PROCEDURES

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DO NOT USE THINNER, ALCOHOL OR PETROL
You may clean the heater with a damp cloth and mild detergent but do not use thinner, alcohol,
petrol or any other organic solution.
CLEAN FILTER REGULARLY (DIAGRAM 6)
a) Remove the filter mesh from the stop valve (for filter type only) by turning the knob filter
counter clockwise and pulling out the knob (Diagram 6). Flush it with water to remove
any trapped sediments. Install the knob filter back to its original position.
CLEAN FILTER
MESH REGULARLY
Filter Mesh
Stop Valve
5. GENERAL MAINTENANCE
Diagram 6

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6. TECHNICAL SPECIFICATION
7. SCHEMATIC WIRING DIAGRAM
Electrical loading 3.8kW 240V 50/60Hz
Other loading Please refer Electrical loading table 1
ELCB sensitivity 15 mA
Operating condition Open system (Open outlet)
Water connection ø15mm (1/2” BSP)
Degree of protection IP25
Min water flow rate 2 litre/ min
Min water pressure 0.2 bar ( 20kPa / 2.9psi )
Max water pressure 6 bar ( 0.6MPa / 87psi )
Heater dimension (mm) 250 (H) x 236 (W) x 87 (D)
Heater nett weight 1.2kg
Notes: The specification of product design and accessories shown are correct at the time of
printing and subject to change without prior notices.
Live L L
Neutral N
E
N
Earth
ELCB
15mA
Thermal Cut Out
Flow Sensor
Temperature
Control
Relay Triac
T2 T1
G
Heating Element
Test / Reset
NON-PUMP ( EWH-K3420(SW) / EWH-K3420(GB) )

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