Electrolux ELECTRONIC BASIC IH 18 User manual

Instantaneous
Water Heater
Instructions for installation and use
IH 18 electronic basic
IH 21 electronic basic
IH 24 electronic basic

2
Contents Page
Important instructions for the user 3
General 3
Operating the appliance 3
Temperature preselection 3
Hot water flowrate 4
Care and maintenance of the appliance 4
Important instructions for the installer 5
General 5
Appliance constitution 5
Technical data 6
Appliance function 7
Safety temperature limiter 7
Installing the appliance 8
Dimensioned diagram 8
Appliance installation 9
Hood dismounting 9
Wall mounting 9
Water connection 10
Concealed installation 10
Installation versions 11
Cleaning the strainer insert 12
Flowrate limiter 12
Electrical connection 13
Mains connection 13/14
Circuit diagram 14
Temperature selector range limitation 15
Hood assembly 15
Using the appliance for the first time and checking 16
Fault-finding 17
Fault indications 18
Important for the expert 19
Customer service 20

3
When the appliance is operated with a
thermostatic mixer tap, the temperature
setting on the instantaneous water
heater must be around 8°C higher than
on the thermostatic mixer tap.
Recommendation for energy-saving operation:
40°C for washbasin, shower, and bath (knob tangibly engages).
55°C for kitchen sink. If this temperature
is no longer needed, the appliance
should be reset to the 40°C energy-
saving level.
Important instructions for the user
General
-Installation and startup should only ever be performed by an approved
installer or authorised installation firm.
-Before using the appliance, please read through these instructions
carefully. The manufacturer cannot accept any liability for damage
resulting from failure to follow these instructions.
-Fittings and connecting pipes may get hot. Therefore keep children well
away.
Operating the appliance
The ELECTROLUX IH electronic instantaneous water heater heats the water
as the latter continuously flows through it. When the hot water tap is opened,
the appliance switches on at a flowrate of around 3 l/min. When the hot water
valve is closed or if the flowrate is reduced below 2.5 l/min, the appliance
switches itself off again. The appliance is suitable for household use and should
only ever be used for heating of drinking water.
One or more tapping points can be supplied with hot water.
Temperature preselection
The electronic system allows continuous temperature selection in the range
from 30°C to 60°C.
Wash basin
Shower
Bath basin
Kitchen sink

4
Hot water flowrate
Up to the appliance’s max. power limit, the instantaneous water heater
supplies the set hot water temperature regardless of the water flowrate
selected.
If the hot water temperature is not attained when the hot water valve
is fully opened, more water flows than can be heated by the
appliance power. In this case, the hot water tap must be slightly
closed.
Because of the different inlet temperatures, the hot water output varies
depending on the season.
The following outlet flowrates for bath or shower water (40°C) or washbasin/
sink water (55°C) are attained at the inlet temperatures of 6°C, 10°C,
and 14°C.
Care and maintenance of the appliance
Clean the plastic housing as necessary with a damp cloth and dilute soap
solution. Never use any abrasive, scouring, and solvent-containing detergents.
The instantaneous water heater generally needs no maintenance. Regular
inspection of the appliance by a trained engineer will ensure its operational
reliability and prolong its service life.
Scale deposits in the outlet of fittings reduce the water flowrate. The air
bubblers of the fittings or hand shower head must therefore be cleaned from
time to time.
Cold
water
tempe
rature
°C
Outlet temperature
40°C Outlet temperature 55°C
6
10
14
18 kW
l/min
7,6
8,6
(*8)
9,9
(*8)
21 kW
l/min
8,8
10
(*9)
11,6
(*9)
24 kW
l/min
10,1
11,5
(*10)
13,2
(*10)
18 kW
l/min
5,3
5,7
6,3
21 kW
l/min
6,1
6,7
7,3
24 kW
l/min
7
7,6
8,4
(*) limited to this figure by the built-in flow limiter

5
Important instructions for the installer
General
The instantaneous water heater is manufactured and tested in conformity with
the valid IEC specifications and DIN standards. The appliance complies with
the Appliance Safety Act. The indications given on the rating plate, the technical
connection specifications of the electricity and water companies in the
geographical area concerned, and VDE 0100 and DIN 1988 must be observed
when the appliance is being installed.
The specific resistance of the water at the installation site should not
be less than 1100 ΩΩ
ΩΩ
Ωcm.
This appliance complies with the following EC Directives:
Appliance constitution
- the ”Low-Voltage Directive” 72/23/EEC of 19.02.1973, including
Amendment Directive 93/68/EEC
- the”Electromagnetic Compatibility” Directive 89/336/EEC of
03.05.1989 including Amendment Directive 92/31/EEC
1 = Back wall
2 =Quick fastener for appliance
mounting
3 =Upper cable bushing
3a = Lower cable bushing
4 =Upper mains connection
terminal (factory-prefitted)
5 =Flowrate sensor
6 =Safety temperature and
pressure limiter
7 =Electronic module
8 =Temperature selector knob
9 =Flowrate limiter
10 =Strainer insert
11 = Cold water connection
12 =Hot water connection
13 =Thermostat
14 =Heating block
123
4
5
10
11
3a
4a
12
6
7
8
9
13
14

6
Technical data
*) In addition to the flow pressures of the instantaneous water heater itself, consideration
must be given to the pressure losses in the household pipework.
Model
Type unvented
Nominal capacity l
0,4
Dimensions
Width
Height
Depth
mm
226
469
99
Weight kg
3,9
Nominal overpressure Mpa
Protection class to VDE
I
Protection type to VDE IP 25 (splash-water protected)
Test mark See rating plate
Water connection
G 1/2 A
Electrical connection 3 / PE ~ 380 V
Nominal output
kW
18
21
24
Spec. water resistance at
15 °C
Ohm cm
> 1100
Switch-on flow pressure*) Mpa
0,035
Switch-on flowrate l/min
3
Mains retroactive effect Free from any mains retroactive effect
to DIN EN 60555/VDE 0838
VDEW Approval
Maximum inlet
temperature
°C
25 °C
IH E
24 basis
IH E
21basis
IH E
18 basis
Flowrate limitation l/min 8 9 10
0,04
0,03

7
Appliance function
The fully electronically controlled ELECTROLUX IH instant water heater is a
pressurised appliance for the supply of one or more tapping points and heats
the water as the latter continuously flows through it. A flowrate sensor switches
on the heating at a flowrate of around 3 l/min and off again at around 2,5 l/min.
The microprocessor controlled electronic system automatically adapts the
heating power with regard for the inlet temperature, the temperature set on the
temperature selector knob, and the water flowrate. The user thus has hot
water available in an energy-saving system giving the exact temperature required
without any time limitation whatever.
The nominal operating pressure is 1 Mpa. If this value is exceeded, a pressure
reducing valve should be provided in the household pipework. A safety valve is
not necessary.
The bare wire resistance heating system has a high efficiency. Its low weight
and extremely low water content also make it suitable for hard, lime-containing
water qualities.
Safety temperature and pressure limiter
In the event of a fault, the inbuilt safety
temperature limiter isolates the appliance from
the mains supply on all contacts.
Before the appliance is switched back on, a
trained engineer must ascertain and eliminate
the cause of the fault (see page 17). Then
carefully press in the contact rocker with a
screwdriver until it audibly engages.
Important! The safety temperature and pressure limiter should never
be adapted or modified in any way!
Important: Don't block up the contact rocker!
Pressurepoint
for screwdriver

8
Installing the appliance
The appliance should only ever be installed or stored in frost-free
premises.
Dimensioned diagram
1= Quick fastener for appliance mounting
2 = Wall mounting
3 = Upper connection terminal (factory-set)
3a = Lower connection terminal for electrical connection
4 = Upper cable bushing
4a = Lower cable bushing for electrical connection
5 = Cold water connection with strainer insert
6 = Hot water outlet
1
2
3
4
4a
3a
5
6
226
190
100
90
37,5
5
4
6
9
2
9
3
395
21
30

9
Appliance installation
Carefully unpack and take out the enclosed pack.
Prepare the appliance for assembly.
Hood dismounting
Press in the engagement lug on the underside of
the appliance from above or from the front with a
screwdriver and take off the hood. Pull out the
connection lead of the temperature set-point
pickup on the electronic system.
The rotational range of the temperature selector
knob can be limited (see page 15).
Wall mounting
Mark out wall-plug holes with the
mounting template supplied,
insert wall-plugs, and screw on
fixing rail (1). Take out threaded
pin (2) from the enclosed pack
and screw in. Then prepare water
connections, mount appliance on
threaded pin and retaining rail,
and fix by turning the quick
fastener (3) one quarter revolution.
1
2
3

10
Water connection
The water inlet temperature on the cold water connection should be
max. 25°C.
If plastic pipe systems are used as installation material, the pipe
manufacturer must expressly and unreservedly confirm the
applicability and quality of his pipes for this application.
The ELECTROLUX IH electronic can be operated with all pressure fittings
suitable for instantaneous water heater.
Insert connector with shutoff spindle (1) in
cold water connection and double- nipple
(2) in hot water outlet using hemp packing.
The shutoff spindle must point downwards
and the screw slot aligned in the flow
direction of the water. The shutoff unit
must not be used for throttling.
Concealed installation