green ecotherm ELTHERM Series, ELTHERM M Series, ELTHERM MM Series Instruction Manual

Instruction manual

for installation and operation of

of hot water electric boiler of series :

ELTHERM, ELTHERM M, ELTHERM MM

www.greenecotherm.eu

p. 2/37

Thank You for buying our product – hot water flow electric boiler of series
„ELTHERM”. This manual will help you to use and maintain the unit properly.

According to Decree No 187/21.09.2000 this product is subject to supervision as
equipment with high hazard and must be entered in the register of technical
supervision of the authorized persons on location by customer’s initiative

ATTENTION!

IN INTEREST OF YOUR PERSONAL SECURITY IT IS
NECESSARY TO READ THOROUGHLY AND CAREFULLY THIS
INSTRUCTION MANUAL BEFORE PROCEEDING WITH ANY ACTIONS
WITH THE BURNER – INSTALLING, CONNECTING, OPERATING,
ETC. IN CASE THAT REQUIREMENTS, DEPICTED IN THIS MANUAL
ARE NOT SATISFIED, FAILURE OF THE UNIT COULD BE EXPECTED,
OR EVEN FATAL CONSEQUENCES, FOR WHICH THE PRODUCTION
COMPANY DOES NOT TAKE RESPONSIBILITY.

Producer ZMM Haskovo Plc.
Address Bulgaria, Haskovo 6300, “Saedinenie” 67 blvd.
Phone [phone]
Fax [phone]
e-mail [e-mail]
home page www.greenecotherm.eu

Instruction manual for installation and operation of hot water electric boiler of series “ELTHERM”

(

Version : 13.12.2011 13:07

)

p. 3/37

Table of contents

Page

1. Hot water electric boiler of series “ELTHERM” – general description and

advantages................................................................................................................ 5

2. Hot water electric boiler of series “ELTHERM ” – technical data............. 7

3. Description of the construction of hot water electric boiler of series

“ELTHERM”......................................................................................................... 10

3.1. Main properties.........................................................................................10

3.2. Detailed description of the hot water electric boilers of series

“ELTHERM”......................................................................................................14

4. Installation of hot water electric boiler of series “ELTHERM”................ 15

4.1. Some basic requirements for correct installation of electric hot water

boiler of series “ELTHERM” are :...................................................................15

4.2. Basic requirements for the properties of the circulating water of the

heating system:....................................................................................................16

4.3. Installation of the hot water electric boiler............................................17

4.1.1. Installation of the hot water electric boiler of series “ELTHERM”,

considering it’s easy maintenance and servicing: ........................................17

4.1.2. Boiler’s positioning according to the requirements for attachment

to the electric power supply circuit................................................................17

4.2. Procedure for installation of the hot water electric boiler of series

“ELTHERM” of the heating system..............................................................18

4.2.1. Connecting to the heating system.....................................................18

4.2.2. Recommended principal hydraulic scheme for the hot water

electric boiler of series “ELTHERM”...........................................................18

4.3. Procedure for connecting the hot water electric boiler of series

“ELTHERM” of the electrical power circuit. ..............................................20

5. System starting procedures. .......................................................................... 22

5.1. Basic requirements...................................................................................22

5.2. Starting up the hot water electric boiler of series “ELTHERM”........22

5.2.1. Interface control board of hot water electric boiler of series

“ELTHERM”...................................................................................................23

5.2.2. System very first start .......................................................................24

5.2.3. Operating of the hot water boiler of series “ELTHERM”............24

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5.2.4. Operating of the hot water electric boiler of series “ELTHERM”

in direct heating systems.................................................................................25

5.2.5. Operating of the hot water electric boiler of series “ELTHERM”

in accumulating heating systems....................................................................26

5.2.6. Operating of the hot water electric boiler of series “ELTHERM”

in mixed heating systems ................................................................................26

5.3. Operating parameters of the boiler.....................................................26

5.3.1. Operating parameters for adjustment of the hot water electric

boiler of series “ELTHERM”.........................................................................27

5.3.2. Nominal operating mode of the boiler.............................................27

5.4. Control of the thermal capacity of the heating system.........................28

5.4.1. Decreasing the thermal capacity of the boiler:...............................28

5.4.2. Increasing the thermal capacity of the boiler:................................28

5.4.3. Controlling thermal capacity of the heating system’s elements: ..28

5.5. Stopping the operation of the system......................................................28

5.6. Turning OFF the boiler............................................................................28

 Emergency stop of the system. ................................................................28

5.7. Showing and teaching the end user about the maintenance and

adjustment procedures.......................................................................................29

5.8. Safety and unexpected risks ....................................................................30

5.9. Operation faults and their repairing......................................................30

5.10. Hot water electric boiler of series “ELTHERM” warranty form

completion........................................................................................................32

5.11. Actions, after the hot water electric boiler of series “ELTHERM” is

not in exploitation anymore...............................................................................32

6. Electrical scheme of hot water electric boiler of series “ELTHERM”..... 33

QUALITY CERTIFICATE ................................................................................. 35

WARRANTY SERVICE PROCEDURES LIST............................................... 37

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1. Hot water electric boiler of series “ELTHERM” – general description and

advantages

The hot-water electric boiler of series “ELTHERM” is a modern, ecological
source of heat, designed for floor and central heating of small and middle-size
housing and industrial buildings. The electric hot water boiler of series
“ELTHERM” is designed for vertical wall mounting only. The boiler heats the
circulating fluid directly, thus making the heating system dynamic. It is
manufactured in the following modifications:

“ELTHERM” - with relay- contactor power supply commutating control system;
“ELTHERM M” - with electronic power supply commutating control system;
“ELTHERM MM” - with electronic commutating power supply control system

and integrated closed expansion vessel;

The kit of the hot water electric boiler of series “ELTHERM” consists
of:

• Main module – according to the model – 1 sp.;

• User manual – 1sp.;

• Wall mounting hanger – 2sp.;

• Room thermostat – 1sp.;

• Circulating water filter – 1sp.;

The electric boilers of series “ELTHERM” are economic, environment friendly,
high efficiency and compact units, allowing installation in narrow spaces. The
electric hot water boilers can be used in every system of central or local heating in
direct, hybrid or accumulating systems. It can be integrated in existing heating
systems, parallel to any type of hot water boiler (i.e. gas, oil or solid fuel hot water
boilers). For the security of the operation, it is recommended to install the electric
boilers in systems, working with circulating pumps, providing forced circulation of
the circulating fluid (which in most of the cases is circulating water). The boilers
minimal pressure safety switch prevents operation at low pressure (of absence) of
circulating water in the heat exchanger. The operating temperatures, as well as the
pressure of the circulating water are indicated by the mounted thermo-manometer.
The electric boilers are made with thermal capacity in the following range: 4, 6, 8,
10, 12, 14, 16 and 18 kW. In order to connect the hot water electrical boiler of
series “ELTHERM” to the power supply electric mains, a permission/authorization
for such connection by the local power supply electric company is required,
following the local legislation and country norms.

p. 6/37

The unit is equipped with

• adjustable thermal capacity operating module, which controls the
functions of the unit and is adjustable to the specific needs of a heating system;

• electric heaters, which work in parallel. The number of the attached
electric heaters is determined by the thermal capacity of the boiler;

• manual thermal capacity switching, which allows optimal operation;

• interface panel, equipped with control and light indicators;

• three speeds circulating pump, which makes forced circulation of the

fluid;

• closed expansion vessel – option, only for “ELTHERM MM”;

Advantages of the hot water electric boiler

• the electric hot water boiler can operate in any type of heating system of

central or local heating, i.e. in direct, hybrid or accumulating type;

• the boiler can be attached in parallel of any type of hot water boiler (i.e. gas,

oil or solid fuel boiler) and can be used as back-up heating unit in case of
malfunctioning of the primary hot water boiler;

• the boiler transforms the electrical energy into heat energy, with practically

no loses, no local pollutant emissions;

• the boiler is installed in order to apply the so called “fuel switch process” for

appliances, utilizing other energy sources – diesel, natural gas, LPG, coal, or
could be installed as back-up heat source;

• the boiler’s design allows easy installation. The heating system and the

boiler/equipment however need minor redesign and reconstruction in order
to allow such process;

• the boiler operates automatically and achieves operation comfort, delivered

by operating of other energy sources, it also permits remote control by
programmable room thermostat;

• the design of the boiler is quite compact, which allows installation in narrow

rooms and high flexibility at installation and operation;

• automatic operation of the boiler allows variable thermal load adjustment

and economic operation of the heating system, which guarantees optimal
thermal comfort and reduced energy consumption;

• simplified installation procedure and initial adjustment, which guarantees

faster assembly and unified approach;

• high efficiency;

• high safety operation due to installed sensors for faulty regimes;

• no local pollutant emissions;

• simplified maintenance and service;

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2. Hot water electric boiler of series “ELTHERM ” – technical data

2.1. General information for the type of the electric hot water boiler of

series “ELTHERM” are given in Table 2.1;

2.2. Thermal and technical data of hot water electric boiler of series

“ELTHERM” of thermal capacity range 4 – 10kW are given in Table

2.2;

2.3. Thermal and technical data of hot water electric boiler of series

“ELTHERM” of thermal capacity range 12 – 18kW are given in Table

2.3;

Model of the boiler Type of control Closed expansion vessel

ELTHERM

Contactor External, not supplied

ELTHERM M

Circuit board External, not supplied

ELTHERM MM

Circuit board Built-in

Table 2.1. General information for the type of the electric hot water boiler of series

“ELTHERM”;

p. 8/37

Parameter Dimension Value

Model of hot water electric
boiler model “ELTHERM”

-

4, 4M,

4MM

6, 6M,

6MM

8, 8M,

8MM

10, 10M,

10MM

Thermal capacity of the boiler kW 4 6 8 10

first stage 4 4 6 6

Thermal stages , kW

second stage - 2 2 4

Electric capacity kVA 4 6 8 10
Operating current A 6 9 12 15
Cross section of the power
supply cable

mm

2

3 x 2.5 + 1.5

3 x 4.0 +

2,5
Nominal current of the main
automatic fuse

A 10 16 20

Power supply - L1, N, PE, 50Hz; 3x230V/400V
Efficiency % 99.1
Weight of the boiler kg 40
Boiler’s water jacket capacity dm³ 9.5

W-width

515

D-depth

245

Overall
dimension of
the system:
(WxDxH)

H-height

mm

630

Operating overpressure of the
circulating water

MPa

0.25 in one-boiler operation;

0.18 in parallel operation with solid
fuel boiler

Heating system expansion
vessel type

- Opened or closed (upto 0.25MPa)

Factory tested overpressure MPa 0.4
Recommended circulating
water temperature in the boiler

ºC

85oC in opened systems;

95

o

C in closed systems
Minimal recommended return
water temperature in the boiler

ºC 60

Supply flow 1”

Connections

Return flow

G

1”

Electric protection - IP40

Table 2.2. Thermal and technical data of hot water electric boiler of series

“ELTHERM” of thermal capacity range 4 – 10kW;

p. 9/37

Parameter Dimension Value

Model of hot water electric
boiler model “ELTHERM”

-

12, 12M,

12MM

14, 14M,

14MM

16, 16M,

16MM

18, 18M,

18MM

Thermal capacity of the boiler kW 12 14 16 18

first stage 6 6 6 6

second stage 6 6 6 6

Thermal stages , kW

third stage - 2 4 6
Electric capacity kVA 12 14 16 18
Operating current A 18 21 24 27
Cross section of the power
supply cable

mm

2

3 x 4.0 + 2.5 3 x 6.0 + 4.0

Nominal current of the main
automatic fuse

A 20 25 32

Power supply - L1, N, PE, 50Hz; 3x230V/400V
Efficiency % 99.1
Weight of the boiler kg 45
Boiler’s water jacket capacity dm³ 7,8 / 10.8 dm3

W-width

676

D-depth

179

Overall
dimension of
the system:
(WxDxH)

H-height

mm

938

Operating overpressure of the
circulating water

MPa

0.25 in one-boiler operation;

0.18 in parallel operation with solid fuel
boiler

Heating system expansion
vessel type

- Opened or closed (upto 0.25MPa)

Factory tested overpressure MPa 0.4
Recommended circulating
water temperature in the boiler

ºC

85oC in opened systems;

95

o

C in closed systems
Minimal recommended return
water temperature in the boiler

ºC 60

Supply flow 1”

Connections

Return flow

G

1”

Electric protection - IP40

Table 2.3. Thermal and technical data of hot water electric boiler of series

“ELTHERM” of thermal capacity range 12 – 18kW;

p. 10/37

3. Description of the construction of hot water electric boiler of series

“ELTHERM”

3.1. Main properties

The hot water electric boiler of series “ELTHERM” consists of the following
elements/modules:

• heat exchanger, which has number of electric heaters, allowing easy

maintenance and operation;

• control module, which allows manual adjustment of the thermal capacity

and operating mode of the boiler;

• circulating pump, which makes forced movement of the heat transport

media (the circulating water). The pump has serially connected mechanical

filter, in order to prevent clogging and blockage of the pump’s rotor;

• closed expansion vessel – only for model “ELTHERM MM”;

Figure 3.1. View of the of the electric hot water boiler of series “ELTHERM”

without expansion vessel;

p. 11/37

Figure 3.2. View of the of the electric hot water boiler of series “ELTHERM” with

expansion vessel;