
OPERATING AND ASSEMBLY MANUAL
ELECTRIC TANKLESS WATER HEATER
FOR CENTRAL HEATING SYSTEMS
(Electric water boiler)
TYPE EKW -
AsDC-W
Intelligent AntiStop system

Insulation (polistyren)
CH hot water inflow
Thermostat sensor cover
Magnesium anode.
(required while installation)
With build-in HUW tank
- exemplary application
3:3312 05 2011 czw c 123456
- CH PUMP
- HUW PUMP
- 8l CH MEMBRANE VESSEL
- 2X ONE-WAY VALVE
Safety valve)
HUW outflow

ELTERM
BODY. BAL. CH. HUW. ROOM. WEA..
Automatics mounting brackets
Room thermostat connection strip
y y y y y y y y y y y y y y y y n
HUW 22 “Room” sensor terminal strip
23 „Floor” sensor terminal strip
24 HUW sensor terminal strip
y y y y y y y y y y y y y y y y y y
n y y y y y y y y y y y y y y y y y y
n y y y y y y y y y y y y y y y y y y

Thank you for placing trust in our company and for purchasing our product
. OPERATING AND ASSEMBLY MANUAL
- ELECTRIC TANKLESS WATER HEATER
FOR CENTRAL HEATING SYSTEMS
TYPE EKW AsZN-W, AsD-W AsDC-W, ASB II (Electric water boiler)
All of the GoldLine (EKW AsZN-W, EKW AsD-W, EKW AsDC-W, EKW AsBII
designed to provide heating to small and medium sized locations equipped with
either open or closed low temperature (T<100°C) central heating water systems.
W in closed central heating system:
Boilers are designed for autonomous operation in both open and closed central
heating systems. Those boiler types come with a safety unit, 8l membrane vessel
and CH pump (*HUW pump in AsD-W and AsDC-W as well).
in closed central heating system
In closed heating system CH installation needs to be equipped in membrane vessel.
The membrane vessel is not supplied with the boiler.
in closed central heating system
In closed heating system CH installation needs to be equipped in membrane vessel
and CH pump. The membrane vessel and CH pump are not supplied with the boiler.
TABLE OF CONTENTS
ELECTRICAL ASSEMBLY . .. . . . . . . . . 5
. . . 8 REFERENCE DIAGRAMS
. . 17 DECLARATIONS OF CONFORMITY.

Please familiarize yourself with
the electrical and hydraulic diagram
well as technical data prior to assembly. Details on www.elterm.pl
are hanging vertical devices and should be
hung on bolts. First, remove the cuboidal casing (unscrew the sheet metal screw
at the bottom of the boiler).
HUW tank (supplied with AsD
W boiler) should as well be hung on bolts
-W (¾” male thread half union for CH pump
1. Feed stub pipe ¾” male thread – on the boiler’s right side (no. 13)
2. Return stub pipe ¾” female thread – on the boiler’s left side (no. 14)
male thread half union for CH pump
1. Feed stub pipe 1” male thread – on the boiler’s right side (no. 13)
2. Return stub pipe 1” male thread – on the boiler’s left side (no. 14)
C – AsB II 54 ÷ 144
– on the boiler’s right side (n
2. Return stub pipe 1” male thread – on the boiler’s left side (no. 14)
D –AsD-W (¾” male thread half union
s – supplied with boiler)
1. Feed stub pipe ¾” male thread – on the boiler’s right side (no. 13)
2. Return stub pipe ¾” male thread – on the boiler’s left side (no. 14)
3. Return stub pipe for HUW ¾” male thread – in the middle (no. 21)
ONE-WAY
VALVES
CH HUW SUPPLY
RETURN
only One-way valves are mandatory while assembly
such valves on CH and HUW return causes inappropriate boiler and
pump operation as well as loss of guarantee.
One-way valves are not supplied with
One-way valves for CH and HUW are factory assembled.
Safety valve is not included.
circulation
The boiler has to be connected to the central heating system
unions according to the direction of water flow (arrows on boiler).
made in accordance with PN-91/B-02413 (open central heating systems) or
PN-91/B-02414 (closed central heating systems.). T
he central heating system has to be
flushed prior to start-up. If installed outside Poland, the boiler ought to be co
with the applicable regulations valid in the country where the boiler is

Connection to the electrical system needs to be done in accordance with the regulations applicable
country where the given boiler is installed, and therefore must be done by qualified electrician (electrical
company installing the boiler puts a relevant stamp on the guarantee card). Heaters with powers from 4
24 kW are designed by an alternating current, 3-phase (400V3N~50Hz). 4, 6 and 9 kW
available in 1-phase (230V1N~50Hz). In case 400V work is essential one should protrude bridge out of L1 L2 L3
clamp bar. Boilers AsZN-W, AsD-W and AsDC-W are equipped in TLZ terminal strip.
AsB II boiler is equipped
in switch disconnector. For this terminal strip one should connect power supply in accordance to L1 L2 L3
description. The technical data table (page 7) provides information on the cross-
section of the power cord to
be used for boiler connection and the applicable power (A) of the main fuses protecting the boiler.
should be connected to the electric installation by a device enabling full power disconnection
required to use residual current device (in case house installation lacks such).
– concerns AsD-W boiler (no. 24)
ELTERM
Body. BALL. CH. HUW. ROOM WEATH
external room temperature controller
ELTERM’s „ThermLine RT” (no. 6)
Sensors
we do connect to boiler using 2
We connect it to the boiler by no. 23 strip, on weather sensor by no.
25A strip – connection order is irrelevant (2-strand wire is not
included to the boiler).
6 we do connect to boiler using 2
We connect it to the boiler by no.
22 strip, on weather sensor by no.
26A strip – connection order is irrelevant (2-strand wire is not
included to the boiler).
Room and weather sensors are universal and exchangeable. One should remember about proper connection according
to points B and C above.

2 – HUW signal icon
3 – HUW pump active icon
4 – HUW program active icon
5 – CH signal icon
6 – CH pump active icon
7 – CH program active icon
8 – current HUW temperature
9 – current CH temperature
10 – time
11 – data
12 – CH and HUW temperature setting icon
13 – floor heating icon
14 – room temperature icon (optional)
15 – weekday
16 – relays status
17 – function buttons
18 –ON/OFF + back button
19 – green diode – boiler turned on
20 – red diode – boiler turned off
21 – CHOOSE button
c
11:53:33
12 05 2011 THU
c
1
2
3
4
5
6
4 kW 4 kW 6 kW 6 kW 9 kW 9 kW 12 kW
33% Modulation of Power Safety fuses (A)
Power cord Heated area Alternative
power supply (mm²) (m²) heating (m²)
by 1/3 by 1/3 by 1/3 by 1/3 by 1/6 by 1/6 by 1/6 by 1/6 by 1/6 by 1/6 by 1/6 1
5 x 4 5 x 4 5 x 6 5 x 6 5 x 10
~ 50 ~ 50 ~ 70 ~ 70 ~ 110 ~ 110 ~ 150 ~ 180 ~ 220 ~ 260 ~ 300 ~ 70 ~ 70 ~ 100 ~ 100 ~ 150 ~ 150 ~ 210 ~ 250 ~ 310 ~ 360 ~ 400 5x35 5x50
5x50
5x50
5x70
5x95
5x120
AsB II boiler Manual power Power
Safety Power cord Heated area
(kW) distribution (V) fuses (A) (mm²) (m²)
EKW 27 9 ÷ 18 ÷ 27 400 3 x 50 5 x 16 220 - 380
EKW 30 10 ÷20 ÷30 400 3 x 50 5 x 16 240 – 400
EKW 33 11 ÷22 ÷33 400 3 x 50 5 x 16 260 – 450
EKW 36 12 ÷ 24 ÷36 400 3 x 63 5 x 16 280 – 480
EKW 39 13 ÷ 26 ÷39 400 3 x 63 5 x 16 290 – 500
EKW 42 14 ÷ 28 ÷42 400 3 x 80 5 x 25 300 – 520
EKW 45 15 ÷ 30 ÷45 400 3 x 80 5 x 25 320 – 570
EKW 48 16 ÷ 32 ÷48 400 3 x 80 5 x 25 340 – 600
EKW 66
EKW 72
EKW 96
EKW 120
EKW 144
3x125 A
3x125 A
3x160 A
3x200 A
3x240 A
* Exact section should be matched by qualified electrician
Exact heated area depends on multiple factors

!!!! Boiler connected to the installation according to
ASSEMBLY. CH (HUW) pump should be turned on for III speed. Valves on
radiators should be completely open while start-up.
POLSKI / ANGIELSKI (ENGLISH).
Confirm language selection.
progress bar”. One cannot skip this part. CH
(optionally HUW) pump turns on –
there is no possibility to disconnect
heaters. Those 5 minutes should be sufficient to vent
including boiler and pump. In case however another venting
please repeat previous step.
(concerns AsD-W and AsDC-W boilers only)
– get back to HUW setting
CH and HUW temperatures are set in the same way.

- press another time, below sign appears
CH - decrease CH or HUW temp.
Multiple press enables getting back to main menu
enter the „weather curve” setting
Weather curves operate for outside temperatures lower than
make them work properly one should set CH temperature, e.g. 30°C and
choose curve number (1 – 10). Zero – no weather correction.
Boiler keeps fixed CH temperature – the one we have previously chosen.
This temperature is then increased by weather correction value, i.e.
boiler’s temperature = set temperature + weather correction; where
correction factor depends on our choice.
weather correction equals:
for 1 for 2 for 3 for 4 for 5 for 6 for 7 for 8 for 9 for 10
higher than 15°C boiler will keep 30°C. For external temperature equal 5°C,
correction will estimate 10 x 0,5 = 5°C, thus boiler will maintain 35°C. For external
temperature equal - 5°C numbers will be: 20 x 0,5 = 10°C, boiler temp.: 40°C.
40 30 K-=1 External temp.
10 -20 -30 K=5 K=10 Curves

Room temperature setting on boiler (optional)
- decrease CH or HUW temp.
Multiple press enables getting back to main menu
: 1. 2. 3. 4. 5. 6. 7. 8. 9. POWER
. . . . . . . . . . . . . . . . . . . 100 / 67 / 33%
. . . . . . . . . . . . . . . . . . . .
. . . . . . . . . . . . . . . .
PID-P . . . . . . . . . . . . . . . . . . . 1
. . . . . . . . . . . . 1
) . . . . . . . . 9 program
SECTIONS
DATE & TIME
PID-P
CH HISTERESE
- decrease boiler power to
or 33% - increase boiler power to
Multiple press enables getting back to main menu

. - press 1 time, SETTING sign appears
- press 2 times, SECTIONS sign appears
to enter SECTION area press one time
Another press shows below screen:
If we would like to turn off HUW, do not
(when we turn off CH function)
(when we turn off HUW function.)
Multiple press enables getting back to main menu
(to enter press twice button on the right )
- change parameter’s value
Multiple press enables getting back to main menu
DATE & TIME
PID-P
CH HISTERESE

proportional integral derivative controller
(to enter press three times button on the right
- change parameter’s value
In case boiler needs long time to achieve set temperature - set 4 or 5
In case boiler reaches set temperature to quickly – set 1 or 2
POWER
SECTIONS
DATE & TIME
PID-P
CH HISTERESE
Multiple press enables getting back to main menu
(to enter press four times button on the right)
e 2 – 3 – 4 – 5 – 6 - „BACK” (
Multiple press enables getting back to main menu
POWER
SECTIONS
DATE & TIME
PID-P
CH HISTERESE
66

(to enter press five times button on the right)
Multiple press enables getting back to main menu
SECTIONS
DATE & TIME
PID-P
CH HISTERESE
HUW HISTERESE
1
2
4
DEF. SETTINGS sign appears
(to enter press six times button on the right
- press another time, below screen is visible
. . . . . . . . . . . 50°C
. . . . . . . . . .. . . . . 100%
. . . . . . . . . . . . . . ON
. . . . . . . . . . . . . . . .
ON - PID-5 . . . . . . . . . . . . . . . . . . . . . . 3
. . . . . .. . . . . . . . . . 6
e . . . . . . . . . . . . . 7
nables getting back to main menu
DATE & TIME
PID-P
CH HISTERESE
HUW HISTERESE
DEF. SETTINGS
1
2
4

WEEKLY PROGRAMMING ON BOILER
+ HUW TIME PROGRAMMING (OPTIO
- are not a standard boiler equipment
Weekly programming on boiler, as well as HUW time programming
enables setting and maintaining
at any defined time periods with minute accuracy. Limpid menu and illuminated
display makes the whole setting process easy. All previously selected parameters are memorized in
non-volatile boiler memory. Electronic processor can steer up to 9 programs, eac
requested temperature in any given time period.
In case of two temperature ranges overlapping, the one with higher, more comfort temperature is
In case of a program overlapping with INITIAL SETTINGS (p
O TU TU WE WE TU WE WE TH TH TH FR FR S
A TH FR FR WEEKDAY PROGRAMING
START – turn the program on
STOP – turn the program off
TEMP – settings from 20°C to 70°C
AKTYWNY – YES/NO
PROGRAM NO. – 1 to 9
FUNCTION BUTTONS
START:
STOP:
TEMP:
ACTIVE:

(to enter press seven times button on the right)
Multiple press enables getting back to main menu
PID-P
CH HISTERESE
HUW HISTERESE
DEF. SETTINGS
TU WE
START:
STOP:
TEMP:
ACTIVE:
TU WE
START:
STOP:
TEMP:
ACTIVE:
TH FR SA SU
08:03
16:00 NR
25 C
YES
(to enter press seven times button on the right
- press another time, settings menu is visible
- change parameter’s value
Multiple press enables getting back to main menu
CH HISTERESE
HUW HISTERESE
DEF. SETTINGS
PROGRAMS ROOM
TU WE
START:
STOP:
TEMP:
ACTIVE:
TU WE
START:
STOP:
TEMP:
ACTIVE:
TH FR SA SU
08:03
16:00 NR
25 C
TH FR SA SU
08:03
16:00 NR
25 C

Each program can be temporarily deactivated
One should then turn in PROGRAMS ROOM or PROGRAMS HUW:
we want to turn the program on
TU WE
START:
STOP:
TEMP:
ACTIVE:
TU WE
START:
STOP:
TEMP:
ACTIVE
:
TH FR SA SU
08:03
1 6 :00 NR
25 C
NO
TH FR SA SU
08:03
1 6 :00 NR
25 C
- press 1 time, counters appear
measurement start for max 24h). After 24h counter stops
autamatically.
counter shows actual energ
last 24h – update every 20 min.
Multiple press enables getting back to main menu
Function enables additional system
ng without turning boiler off.
ing guarantees its proper operation, as well as preven
installation from too quick wear.
Additional possibility to check whether CH and HUW pumps operate properly.

ON Same method applies to CH installation
ing process, one should turn function off
Multiple press enables getting back to main menu
(Max. Operation temperature 40°C)
AsZN-W boiler in floor heating instalation
AsZN-W as an independent heat source
AsDC-W boiler
With build-in HUW tank – exemplary diagram
AsZN-W boiler with HUW tank
- heating large quantities of water in short time

DECLARATION OF CONFORMITY
ELTERM M.M. KASZUBA SP.J. 86
We herewith declare, under our sole responsibility, that the following products:
heater for central heating systems (electric central heating water boiler)
• EKW4As, EKW6As, EKW9As (~230V,50Hz, max power 4kW, 6kW, 9kW),
EKW4As, EKW6As, EKW9As, EKW12As, EKW15As, EKW18As, EKW21As, EKW24As, EKW27As, EKW30As, EKW33As,
EKW36As, EKW39As, EKW42As, EKW45As, EKW48As (3N~400V,50Hz, max power 4kW, 6kW, 9kW, 12kW, 15kW,
18kW, 21kW, 24kW, 27kW, 30kW, 33kW, 36kW, 39kW, 42kW, 45kW, 48kW)
• EKW-AsBII (3N~400V,50Hz, combined max power 54- 960kW, boilers’ cascade, each up to 48kW)
Models: AsPC, AsP, AsBN, AsZN, AsD, AsBI, AsZN-W, AsD-W, AsDC-W, AsBII
manufactured at the Elterm production plant,
are in conformity with the applicable provisions of the following EC Directives:
(LVD) Electromagnetic Compatibility Directive
Directive on the restriction of the use of
certain hazardous substances in electrical and
electronic equipment (RoHS)
Directive on waste electrical and electronic equipment
and that the standards hereinafter referred to have been duly applied and observed. The last two digits of the year of the CE
marking application: 08. The harmonized standards applicable to the product to which this declaration of conformity pertains:
: :94+A11:95+A1:96+A12:96+A13:98+A14:98+A2:2000
Safety of household and similar elec
+A15:2000+A16:2001:2004/A1:2005/A12:2006(U)
Particular requirements for tankless water heaters
erference emission for household appliances
Harmonic current emissions
Limitations of voltage fluctuations
:1998+A1:2000:2005/A1:2007(U)
Other documents or information required by the EC Directives:
Laboratorium Elektrotechniczne PCBC S.A.
Laboratorium Badawcze Maszyn i Urządzeń J.N.B. EUROVITA Sp. z o.o.
Laboratorium Badawcze Maszyn i Urządzeń J.N.B. EUROVITA Sp. z o.o.

from 25 to 420 kW
LEATHERETTE
COAT
SHE-SP ELTERM
WITH AIR SEPARATOR
PUMP MODULES WITH MIX SYSTEM
Boiler's pump module with mix system
: - Boiler's return protection (against dew
effect)
- Required along with new solid fuel CH
boilers installation (guarantee terms)
- Pump work regulation according to
temperature differences (supply vs.
return) - (turns pump off when low
supply temp. occurs)
- In case there is no separate safety
pipe in CH, boiler will not be cut
off from open system vessel (as it
happens in case of 3- and 4-way
valves)
Floor heating's pump module with mix system
- Possibility to link up two separate funnels
- Regulation from 2° to 50°C

Reccomended room temperature controllers:
Room temperature controllers
Pump temperature controllers
ThermLine RT–F (floor temp.)
ThermLine RT–RF (air-floor temp.)
ThermLine RT–RW (wireless air temp.)
ThermLine PT-P3
ThermLine PT-P4
controlls HUW pump
controlls CH and HUW pump
Advantages of RT controller:
• Programming with accuracy of 1 min.
• 9 independent programs
• Actual temperature setting
• Accurate hysteresis - from +/- 0,1°C to +/- 1°C
• Removable steering panel (safe installation)
• Build-in installator mode
• 16A relay
• Non-volatile memory
Advantages of PT controller:
• LED display
• Intelligent Anti Stop system
• Anti-freeze
• Simple handling
Electric towel rails and bathroom hea
and ECOTERM 320 ÷ 800 W with stepless power regulation
Full offer on www.elterm.pl
ELTERM M.M. Kaszuba SP.J.:86-200 Chełmno, ul. Przemysłowa 5, POLSKA,
tel. (0048) 56/686 93 05, 692 06 06, biuro@elterm.pl • www.elterm.pl