
Elterm M.M.Kaszuba Sp.J., ul. Przemyslowa 5, 86-200 Chelmno
Operating and assembly manual:
electric tankless water heater for central heating systems
(Electric heating boiler)
AsP (Wachmistrz/Venus/Venere)
AsBN (Rotmistrz/Earth/Terra)
AsZN (Major/Mars/Marte)
AsD (Brygadier/Jupiter/Giove)
AsBI (Działon/Saturn/Saturno)
AsMB (Mobilny/Mobile/Mobil)
AsHZ (Husarz/Comet/Cometa)
AsBIII (Batalion/Star/Stella)
Please see video prior installation

Elterm M.M.Kaszuba Sp.J., ul. Przemyslowa 5, 86-200 Chelmno
DIMENSIONS AND COMPONENTS OF ELECTRIC HEATING BOILERS
(for more detailed pictures please see www.elterm.pl)
Dimensions and components of AsBN boiler
Dimensions and components of AsP boiler
Dimensions and components of AsD boiler
Dimensions and components of AsZN boiler
Dimensions and components of AsBI boiler
Dimensions and components of AsMB boiler

Elterm M.M.Kaszuba Sp.J., ul. Przemyslowa 5, 86-200 Chelmno
APPLICATION
All SilverLine and RedLine heating boilers are 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.
AsP boiler in closed central heating system – in closed type layout, the central system needs to be
equipped with a safety unit and expansion vessel. Regardless of the system type (open or closed), the
boiler needs to work with circulation pump. Safety unit, expansion vessel and circulation pump are not
supplied with this model.
AsBN, AsBI and AsBIII boilers in closed central heating system - in closed type layout, the central system
needs to be equipped with an expansion vessel, which is not supplied with above models.
AsZN, AsHZ and AsMB boilers in closed central heating system – those models are designed for
autonomous operation in both open and closed central heating systems – safety unit, expansion vessel and
circulation pump is included.
AsD boiler in closed central heating system – this model is designed for autonomous operation in both
open and closed central heating systems – safety unit, expansion vessel and circulation pumps are
included. Additional water tank with coil (at least 12kW) is needed for proper boiler operation.
1. External metal cast
2. Mounting plate
3. Automatics mounting bracket
4. LED display
5. Control panel
6. Room thermostat connection strip
7. Boiler body
8. Boiler insulation
9. Heating unit
10. Automatic air vent 3/8’’
11. Terminal strip
12. Relays
13. Feed pipe ¾’’ (1’’ in AsBI and AsBIII)
14. Return pipe ¾’’ (1’’ in AsBI and AsBIII)
15. Electronic pump for CH
16. Safety valve 3 bar
17. Manometer 4 bar
18. Expansion vessel 8l
19. Return pipe ¾’’ for HUW (in AsD only)
20. Electronic pump for HUW (in AsD only)
21. Switch ignition
22. Solar air vent
23. Industrial SSR relays
24. Metal manometer 4 bar
25. Power cable with CEE Stecker 32A
26. Thermometer
27. Strainer
28. Drain valve
29. Rubber hose (not included)
30. Aluminum hand trolley
Dimensions and components of AsHZ boiler
Dimensions and components of AsBIII boiler

Elterm M.M.Kaszuba Sp.J., ul. Przemyslowa 5, 86-200 Chelmno
HYDRAULIC ASSEMBLY
All SilverLine and RedLine boilers are hanging (except AsMB), vertical devices and after
taking down external metal cast, should be hung on the wall using attached mounting
screws.
Electric heating boiler has to be connected to the central heating system using
couplings (3/4”, 1” or 5/4” – depending on model) according to the direction of water
flow (see glued arrows on boiler). Connection to be made in accordance with PN-91/B02413 (open systems), PN-91/B-02414 (closed systems) or applicable regulations valid
in the country of installation. Central heating system has to be thoroughly flushed prior
installation. Non-return valves (see picture on the right) are mandatory for proper AsD
boiler operation (those valves are not supplied with boiler).
ELECTRICAL ASSEMBLY
Connection to the electrical system needs to be done in accordance with regulations applicable in the
country where the given boiler is installed and therefore must be done by a qualified electrician only.
Boilers are designed for alternating current, 3-phase power supply (400V 3N~50Hz). Models with 4, 6, 9, 12
and 15kW powers are also available without any processing in 1-phase version (230V 1N~50Hz), greater
powers can also be prepared in 1-phase version upon request. Boiler’s power supply is connected to
terminal strip labeled as L1L2L3N. PE wire needs to be connected to screw on mounting plate. Technical
data table (below) provides information on the cross-section connecting power cord, the applicable
parameters of the main fuse protecting boiler, as well as estimated heated areas for main and alternative
heating source. Boiler should be connected to permanent electrical system via device enabling boiler’s
disconnection from heating source at all ends, with the distance between contactors not less than 3mm.
BOILER START-UP
Connection strip
Please familiarise yourself with the electrical and hydraulic diagram and technical data prior to assembly.
Boiler by default is not equipped with room temperature controller, therefore open bridge (jumper bar)
is placed on terminal A. Device will turn heaters on with closed bridge only.
In order to prevent increased components wear and unnecessarily inflated electricity bills - bridge
needs to be replaced with wired or wireless, voltage free (zero Volt) room temperature controller as
soon as possible.

Elterm M.M.Kaszuba Sp.J., ul. Przemyslowa 5, 86-200 Chelmno
Terminal A – use to connect voltage free room temperature
controller
Terminal B – use to connect temperature sensor 1 to boiler’s
body – central heating function (CH)
Terminal C - use to connect temperature sensor 2 to hot
water tank equipped with coil – hot utility water (HUW)
LED display, signaling system and control
Manual power
distribution (%)
* Heated area A – boiler as main source of heat ** Heated area B – boiler as alternative source of heat
Exact cable cross section must be matched by qualified electrician based on local conditions analysis.
2. CH operation diode (AsD)
3. HUW operation diode (AsD)
9. Diode – power distribution
10. Diode – operating time
13. RIGHT – change button

Elterm M.M.Kaszuba Sp.J., ul. Przemyslowa 5, 86-200 Chelmno
SETTINGS
Make sure the boiler is connected to electrical system in accordance with ELECTRICAL ASSEMBLY section.
1. Red diode is on, heating is off and boiler in stand-by mode – recommended mode in off-heating season
2. Press and hold power button for 5 seconds, green diode appears
3. LED display shows number 300 and starts the countdown. This process cannot be skipped – during this
time only central heating pump is activated, heaters remain idle. 300 seconds should be sufficient for
bleeding boiler and installation, if it isn’t - please turn the boiler off and on again to repeat activity.
4. For AsD model only. LED display shows number 50 – it represents current HUW temperature set on
boiler (bottom line visible on display). Increase required temperature, decrease required
temperature, confirm required temperature, go to CH temperature setting.
5. LED display shows number 20 – it represents current CH temperature set on boiler (upper line visible on
display). Press once – temperature read starts to pulse, increase required temperature, decrease
required temperature, confirm required temperature, go to P01 function.
P01 – Boiler power – manual distribution
Shows current boiler power setting, increase power (67%, 100%), decrease power (67%, 33%),
confirm setting (100% is recommended), go to P02 function.

Elterm M.M.Kaszuba Sp.J., ul. Przemyslowa 5, 86-200 Chelmno
P02 – Pump operation time setting
Shows current pump operating time, increase operating time, decrease operating time,
confirm setting (10 is recommended), ON parameter on display sets continuous pump operation
independently of boiler heaters operation status, go to P03 function.
P03 – PID controller
Shows current PID setting, increase coefficient decrease coefficient, confirm setting (3 is
recommended), go to P04 function. Note: if it takes too long for boiler to reach required temperature,
set coefficient on 4 or 5 and to 1 or 2 if the increase is too fast.
P04 – Maximum boiler operating temperature - CH
Shows set operating temperature, increase temperature up to 70°C (90°C for AsHZ and ASBIII only),
decrease temperature, confirm setting (70 is recommended), go to P05 function.
P05 – Maximum boiler operating temperature – HUW (AsD model only)
Shows set operating temperature, increase temperature up to 65°C, decrease temperature
down to 5°C, confirm setting (50 is recommended), go to P06 function.
P06 – Boiler operation hysteresis
Shows current hysteresis setting, increase value 2-6°C decrease value 5-1°C, confirm setting
(6 is recommended), go to P07 function. Note: 1-2-3°C setting is available with max temperature of
40°C; 4-5-6°C setting is available with temperatures between 50 and 90°C.
P07 – Energy consumption in kWh (for preset time not exceeding 24h, after 24h counter stops)
Shows consumption level in kWh, counter resets, kWh consumption level is calculated with 1
second updates, go to P08 function.
P08 – Energy consumption in kWh for the last 24 hours
LED display shows consumption level in kWh for the last 24h with 20 minutes updates, go to P09
function.

Elterm M.M.Kaszuba Sp.J., ul. Przemyslowa 5, 86-200 Chelmno
P09 – Boiler default settings
Shows currently selected parameter, restore default settings:
1 - power 100%,
2 – pump operating time 10min.,
3 – PID 3,
4 – CH temperature 70°C,
5 – hysteresis 6°C,
6 – HUW temperature 50°C (AsD model only),
go to P10 function.
Note: upon selecting P09 function, boiler automatically enters bleeding mode – please wait 300 seconds for
it to start operating properly.
P10 – Hygienisation (AsD model only)
HIG sign shows, start process, stop process. Note: hygienisation function increases HUW
temperature to 70°C level for one hour. Function operation is signalized by lower line blinking.
Do not remove boiler external metal casing once device remains turned on.
In case boiler is activated by mistake with no water inside, wait until heaters cool down, fill device with
water and switch it on again. Under no circumstances fill device with cold water when heaters are still hot!
Once water in central heating system is heated, system should be bled once again (special attention must
be paid to the bleeding of the central heating pump and boiler air vent).
Elterm boilers are equipped in AntiStop function. Automatics turns the pump on for one minute once
every 14 days, what prevents it's rotor from seizing. AntiStop operates independently from on/off mode.
It is therefore highly recommended to keep boiler in off mode (red diode visible) in off-heating season in this mode device uses just 0,5W!

Elterm M.M.Kaszuba Sp.J., ul. Przemyslowa 5, 86-200 Chelmno
1. No diode visible after boiler
connection to main power supply
No power supply
Thermal switch (100°C) has been
activated
Automatic thermal switch activated
Breakage or mechanical damage of
control cables
Check main fuse for boiler power supply
Check wiring continuity and status
Wait for cooling and check cause of
overheating:
- check pressure in CH system (airlocking)
- bleed CH system and pump
- check whether heating pump is working
- clean central heating filter (if
applicable)
- check whether valves on radiators are
open
- check radiators power
- reduce boiler power
2. External residual current device is
activated
Boiler electronics safety unit triggers
activation
3. Rapid temp. increase during start (on
display)
Lack of circulation in CH system
Boiler power to high for radiators
Wait for cooling and activate 100°C
thermal switch
4. Diodes visible, pump completed
bleeding cycle, yet after 300 seconds
boiler does not initiate heating section
start
Room thermostat terminals damaged or
open bridge
Adjust room thermostat terminals
(bridge)
Defective room thermostat or it’s wiring
Check room thermostat battery
Check room thermostat wiring (shortcircuit)
Check wire connection between boiler
and room thermostat
Room temperature reached already, idle
time
Wait for room temperature drop
(verification)
5. LED display shows one of the below
message:
E01 – sensor error – short circuit
(insufficient resistance, e.g. sensor wire
damaged)
E02 – sensor error – excessive resistance
(sensor not connected, wire broken,
terminals not tightened properly on
terminal strip)
Temperature not measured, damaged
sensor
Check if sensor wires are properly
tightened to the terminal strip
Replace thermistor if necessary
Check for signs of wire mechanical
damage
6. LED display shows one of the below
message:
E03 – no room thermostat installed
E04 – too fast temperature increase
No room thermostat connected to the
boiler – continuous operation for 96h
By default bridge is made on room
thermostat terminal strip – it needs to
be replaced by proper room
temperature controller. Boiler is
designed for operation with any type of
voltage free device.
7. LED display shows one of the below
message:
E04 – too fast temperature increase
8. Once the main switch is activated,
diode is on but control buttons are not
responding
Electronic board is disconnected from
main board (gap has created)
Tighten securing nuts (bottom part)
9. Boiler’s main fuse is activated
Insufficient fuses amperage
Replace with appropriate fuse size
Disconnect some of the heaters
Possible heater short circuit
Locate defective heater and disconnect it
Replace it in case of insufficient power

Elterm M.M.Kaszuba Sp.J., ul. Przemyslowa 5, 86-200 Chelmno
Declaration of conformity CE - EN3/2016
Elterm M.M.Kaszuba Sp.j., ul Przemysłowa 5, 86-200, Chełmno, Polska
We herewith declare, under our sole responsibility, that the following products: Tankless water heater for central heating
systems (electric central heating boiler type EKW As:
Variants:
~ 230V,50Hz, max.power 4kW, 6kW, 9kW,12kW, 15kW, 18kW, 21kW and 24kW
3N~400V,50Hz, max.power 4kW, 6kW, 9kW,12kW, 15kW, 18kW, 21kW, 24kW, 27kW, 30kW, 33kW, 36kW, 39kW,
42kW, 45kW, 48kW and boiler cascades 1,5MW (each boiler up to 48kW)
Models: AsPC, AsP, AsBN, AsZN, AsD, AsBI, AsZN-W, AsD-W, AsDC-W, AsBII, AsHZ, AsHN, AsBIII, AsBIV, AsMB, manufactured at
the Elterm production plant, are in conformity with the applicable provisions of the following EC Directives:
Low Voltage Directive (LVD)
Electromagnetic Compatibility Directive (EMC)
Directive on the restriction of the use of certain hazardous substances in
electrical and electronic equipment (RoHS)
Directive on waste electrical and electronic equipment (WEEE), GIOŚ
register number E0001767
General rules for setting requirements concerning Ecodesign for energy
related products (Attachment 13)
EU Commission regulation nr 622/2012
With regard to Ecodesign requirements for glandless standalone
circulators and glandless circulators integrated in products
and that the standards hereinafter referred to have been duly applied and observed. The harmonized standards applicable to
the product to which this declaration of conformity pertains:
Safety of household and similar devices
Particular requirements for tankless water heaters
Interference emission for domestic appliances
Harmonic current emissions
Limitation of voltage fluctuations and flicker in low-voltage
supply systems
Electromagnetic fields- methods for evaluation and
measurement
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.

Elterm M.M.Kaszuba Sp.J., ul. Przemyslowa 5, 86-200 Chelmno
Boiler’s type, serial number, production date
Legible stamp of a retail outlet and signature
Unless the above stamps are present the guarantee is invalid
GUARANTEE
1. Guarantee for trouble-free operation is valid for a period of 24 months (12 months for AsMB).
2. Guarantee expires if any alterations are made to the product without the manufacturer’s consent, or if assembly or use are
not in accordance with the enclosed operation manual and terms and conditions of guarantee.
3. Guarantee repairs are made by the manufacturer or persons/companies authorized by the same.
4. If filled out incompletely, the guarantee is invalid.
5. If the serviceperson discovers machine failure resulting from the user’s fault (e.g. improperly made wiring system, air-locked
central heating system, use or assembly that is not in compliance with the user manual etc.), or in the event the guarantee is
invalid, the costs of repair and travelling are borne by the claimant.
6. Failure on the part of the user to follow the serviceperson’s recommendations provided in the guarantee repair protocol
results in the guarantee being suspended until such recommendations are implemented.
Do not call servicemen without becoming fully familiarized with the boiler user manual, as well as conditions of guarantee
and assembly. Before you call service, read the section „TROUBLESHOOTING.
Stamp of serviceman, short description of repair and recommendations for the user
Following guarantee repair by the serviceman, one of the below guarantee coupons to be cut off, filled out and handed to the serviceman
Guarantee coupon I
…………………………….……………………………………………………………………………………………………………………………
Full name and address of the boiler owner
…………………………….……………………………………………………………………………………………………………………………
Postal code, town /Boiler owner tel. no.
…………………………….………………………………………… …………………………………………………………
Production date Boiler serial no.
Guarantee coupon II
…………………………….……………………………………………………………………………………………………………
Full name and address of the boiler owner
…………………………….……………………………………………………………………………………………………………………………
Postal code, town /Boiler owner tel. no.
…………………………….………………………………………… …………………………………………………………
Production date Boiler serial no

Elterm M.M.Kaszuba Sp.J., ul. Przemyslowa 5, 86-200 Chelmno
Our other products:
For more information please visit
www.elterm.pl