Centrometal EKO-CKS 500 Technical Instructions

TECHNICAL INSTRUCTIONS

for assembling, use and maintenance
of solid fuel firing boiler and its
additional equipment

TUBCKPM-05-2014-eng

EKO-CKS 500

HEATING TECHNIQUE

Centrometal d.o.o. - Glavna 12, 40306 Macinec, Croatia, tel: [phone], fax: [phone]

2

Technical instructions EKO-CKS 500

Technical data

TECHNICAL DATA

of the boil er
body

Total boile r
dimensi ons

connections

Dimensi ons

Boiler

Width (B)

Total width (B1)

Depth (L)

Total depth (L1)

Main / return flow

Safety line

Filling / drainage

Safety line dimensions

Safety pump
suggestions

Rated thermal output

kW
mm
mm
mm
mm
mm
mm

kg

l
bar
DN
DN

G
G

mm
mm

kg

2920

Height (H)

Total height (H1)

Boiler body mass

Total boiler mas (firing boiler body

with insulation & regulation)

Boiler water content

Max. operating pressure

Flue gas connection (on boiler)

Flue gas connection (on fan)

TYPE

380-500

2665
1245
2540
2665
1391
2540
2850

1700

4

100

50

5/4"

2"

430 x 170

202

EKO-CKS 500

TIP

like Grun dfos

TYPE UPS- 32-80

Dimensions

H2
H3
H4
H5
DL
SV
VV

mm
mm
mm
mm
mm
mm
mm

Type

670
920

2080

600

1613

782
654

EKO - CKS 500

mm
mm
mm
mm

Type

3510
2560
2505
2355

EKO - CKS 500

Total boiler lenght with cyclone L2

Total height of the cyclone with the fan K

Height of the flue gas exh. conn. of the fan J

Height of the cyclone I

3

Technical instructions EKO-CKS 500

Dimensions of the boiler

Legend:

DPK

DPV

OC
OSZ
PLV
PP
PVV
SPLV
VC
V
K

Boiler flue gas exhaust
(boiler to cyclone)
Fan flue gas exhaust
(fan to the chimney)
Opening for cleaning
Secondary air door
Inlet
Filling/Draining
Outlet
Outlet
Door for cleaning
Fan

Hot water boiler EKO-CKS 500

-

-

-

-

-

-

-

-

-

-

-

Safety outlet line
Temperature sensor probe
Thermometer

Condensate exhaust connection

Lower boiler door
Upper boiler door
Visual control opening
Primary air door/opening
for cleaning
Opening for under pressure regulator
Side opening for the primary air
Cyclone

SPVV
STO
T
OK
DV
GV
OG
VPZ

ZP
BOZ
CC

-

-

-

-

-

-

-

-

-

-

-

B1

DL

SPVV

DPK

PVV

ZP

DPV

V

CC

I

J

K

B

VPZ

OSZ

DV

OK

T

GV

OG

SV

VV

VC

STO PLV SPLV

BOZ

L=L1

L2

OC

PP

H5

H2

H3

H4

H=H1

DPK

DPV

K

A

A

Section A-A

f260

f230

f202

f

1

1

Flue gas connection

DPV-dimensions

4

Dimensions of cyclone CC

H

H1

H2

D

D1

D2

D3

D3

L

L2

L1

L3

L4

L5

L6

Draining / cleaning
door

Connection to the fan
and flue gas exhaust
installation

Connection to the boiler

CYCLONE CC 500 - Technical data

Cyclone type
Boiler type

CC 500

EKO-CKS 500

Total height of the cyclone H
Boiler connection height H1
Height opening for draining H2
Total depth of the cyclone L
Total width of the cyclone L1
Distance L2
Connection height L3
Connection width L4
Height opening L5
Width opening L6
Distance L7
Distance L8

Cyclone diameter DO
Pening diameter D1

Outer connection diameter D2
Screw hole diameter D3

Cyclone mass

(mm)
(mm)
(mm)
(mm)
(mm)
(mm)
(mm)
(mm)
(mm)
(mm)
(mm)
(mm)
(mm)
(mm)
(mm)
(mm)

(kg)

2360
2080

730
845
790
232
526
266
430
170
226

243
fi 650
fi 203
fi 260

fi 14

158

L7

L8L8

Technical instructions EKO-CKS 500

5

Description of the boiler

1.0. DESCRIPTION OF THE BOILER

Boiler EKO-CKS 500 is a special steel boiler for central heating systems. It has been
constructed on the basis of a long term experience. The boiler is engineered for solid fuel
firing. Its nominal thermal output is achieved through solid fuel (Hd>15000 kJ/kg). The steel
body of the boiler is welded according to modern technology, produced out of high quality
material. Boiler`s efficiency rate reaches over 75%. It is constructed for a maximum
operating pressure of 4,0 bar. The entire surface inside the boiler which comes in touch
with fire or with smoke is in contact with water and its tubing net has water cooling. Flue
gases are streaming through three passages of exchanging surfaces: combustion
chamber, first bundle of boiler flue exhaust and the second bundle of boiler flue exhaust
tubes. After that they are coming out through the smoke chamber and through the chimney
connection to the cyclone. In the cyclone the rigid particles are outshine from the flue
gases, passages through the fan and went to the chimney. The firing procedure is manual
through the spacious door. The temperature , i.e. fire intensity is regulated by a before fixed
flue gas damper which is situated in the flue gas exhaust and the regulator which steers
the fan installed on the cyclone. Additional regulation of the fire intensity can be also
perform with the opening for the secondary air which is situated on the lower boiler door.
The upper boiler door enables the access to the first and second bundle of the boiler flue
exhaust tubes and their cleaning. There is also free access to all other doors and openings
when the boiler has to be cleaned. The boiler is equipped with all necessary connections
for the connection to the central heating system. The body of the boiler is delivered
separately from the casing and the thermal insulation and separately cyclone and fan
which enables easier transportation and assemblage without unnecessary risks of casing
damage.

WARNING:
Connection of the boiler to the chimney and to the central heating system as well as
the start-up has to be performed by the authorized person licensed on behalf of
Centrometal d.o.o. company.

Technical instructions EKO-CKS 500

6

Delivery package, assemblage of the boiler

1.1. DELIVERY PACKAGE

- Boiler's body with the door

- Casing with thermal insulation

- Thermometer, draught regulator, cleaning set (cleaning brush, poker, shovel)

- Cyclone is used to expell the dust particle

- Fan for the flue gases

- Boiler regulation CK/CKB

2.0. ASSEMBLAGE OF THE BOILER

The boiler and cyclone has to be put on the previously prepared concrete fundament
which minimum height is 200-300 mm. The upper fundament surface has to be smooth and
exactly horizontal.
The room has to be frost proof and adequately ventilated. The boiler and the cyclone
has to be situated in order its connection to the chimney can be performed correctly (Image

1.) its cleaning and handling should be convenient, the boiler, cyclone and fan has to be
situated to have all its parts easily accessible. The casing has to be assembled after the
boiler has been connected to the cyclone, chimney and to the central heating system,
according to the instructions attached with the casing (Image 5.). Before the mounting of
the casing to the boiler it is necessary to attach the boiler regulation to the casing of the
boiler (see point 9.3) Before any kind of connecting the boiler and cyclone to the installation
the boiler and the cyclone has to be in level ( has to be put exactly in the horizontal
position)

Opening of upper
boiler door on left
side

Opening of upper
boiler door on right
side

Chimney

min. 100 mm

min. 300 mm

min. 1600

Figure 1. Minimal distances from the boiler room walls

Cyclone CC
with fan

Technical instructions EKO-CKS 500

7

Connection to the chimney

3.0. CONNECTION TO THE CHIMNEY

Properly dimensioned and built chimney is the main condition for safe and economical
functioning of the boiler. The thermal insulation of the chimney has to be done properly, it
has to be absolutely gas-proof and smooth. On its lower part there has to be built in the opening
for cleaning with the door. An brick - layed chimney has to have three layers with an insulation
of 30 mm in the middle, if the chimney is built inside the house (i.e. inside the heated area), or
an insulation of 50 mm if it is built outside the house (i.e. outside the heated area). The flue gas
temperature has to be at least 30°C higher then the temperature of their condensation point.
The choice and the construction of the chimney have to be performed by the authorized
person.

Damper for the fan balancing
(Flue gases temper. behind the fan drive has to be
min. 160°C-180°C)

Klingerit joint (included)

Note:

- Cyclone and boiler connection with screw joint
M12- 6 pieces

- Cyclone to be connected to the fundament by
screws

- Connection of cyclone to the fan by screw joint
M10 - 8 pieces

Flue gas exhaust
fan with electro
motor

Cyclone CC

Compensating
set (included)

- Connection of the fan to the flue gas installation has to be
performed using the compensating set to reduce vibrations

- Connections of the boiler to the cyclone and fan to the flue gas

installation have to be gas-proof.- Flue gas installation has to be
absolutely gas-proof.

- Flue gas installation and the cyclone have to have a thermal

insulation

Temperature at rated thermal output
has to be min. 160°C - 180°C

Chimney

Vessel for cyclone
cleaning (clean when
necessary)

Figure 2. Connection mode of the boiler EKO-CKS with the cyclone and fan to the chimney

Thermal insulation
necessary

Thermal insulation
necessary

Boiler regulation

10mm

TEHNIKA GRIJANJA

!

Technical instructions EKO-CKS 500

EKO-CKS 500

TYPE

INTERSECT

HEIGHT *

CHIMNEY

DIAMETER **

10 metara

minimalno fi 500 mm

* Intersect height

- chimney height from intersect flue gas tube with chimney to top of the chimney

** Promjer dimnjaka

- interior chimney diameter.

NOTE:
Flue gas box (connection fan with chimney) must be straight and maximal lenght of
1 m (elbow must not be used)!

4.0. PRIMARY AIR SUPPLY OPENING

Every heating room has to have an fresh air opening dimensioned according to the boiler's
capacity. The opening has to be protected by a net.

A=6,02 × Q

2

A - opening surface in
Q - rated thermal output in kW

The cyclone and connecting tubes has to have a thermal insulation made out of 30-50mm thick
stone wool. In order to unable condensate fwlrom the chimney to the fan, the flue exhaust tube
has to be situated 10mm deeper inside the chimney. If for any reason the boiler and the cyclone
have to be connected to the chimney dimensioned for higher capacity boilers, the possibility of
condensation inside the chimney shall be highly increased. The boiler's function shall not be
affected, but the damper on the flue exhaust has to be positioned according to the chimney
underpressure.

8

Connection to the chimney, opening for fresh air

Technical instructions EKO-CKS 500

The boiler has to be connected to the open system according to the scheme on the
image 3. All connections from the boiler to the open expansion vessel and from the open
expansion vessel to the boiler have obligatory to be covered by the thermal insulation of min.
40mm (stone wool or equivalent insulating material). If the expansion vessel is situated
outside the heated area, it has to be insulated. The dimension of the open expansion vessel is
determined by the quantity of water inside the installation, i.e. approximatly 7% of the total
water quantity inside the entire installation.

5.0. CONNECTION OF THE BOILER TO THE CENTRAL HEATING INSTALL.

5.1. CONNECTION OF THE BOILER TO THE OPEN EXPANSION VESSEL

5.2. BOILER SAFETY PUMP

In order to minimize the condensation inside the boiler a safety line with an safety pump
has to be build in (Image 4.). Activating and disactivating of the safety pump is steered by the
pipe valve situated on the boiler's outlet, approx. 300 mm from the safety line connection point,
towards the installation with an functioning field of 0°C to 65°C. Safety line suggestions
according to the boilers capacity is shown by the table „TECHNICAL DATA“. Safety line have
to be cover by thermal insulation, min. 40mm stone wool or equivalent insulating material.

5.3. CONNECTION OF THE BOILER TO THE CENTRAL HEATING SYSTEM

The central heating system to be connected to the boiler has to be performed according all
professional and security standards. The regulation of the room temperature can be solved in
few ways, but each of solutions has to be worked out in order the outlet water operating
temperature does not reach the value below 60°C. It is recommended to build in the 4-
passes manual valve. In order to minimize the water steam condensation of the flue gas, it is
necessary the circulating pump of the heating circuit/s to be activated and dis activated by
means of the pipe thermostat set up to min. 75°C. The system can also be regulated by means
of any other appropriate system. The pipe thermostat has to be situated on the boiler's inlet
right next to its connection to the boiler. The general connection plan is figured on the image 4.

9

Connection to the installation, boiler safety pump

Technical instructions EKO-CKS 500

Figure 3. General connection plan of the EKO-CKS boiler with the open expansion vessel

(open system)

A

B

C

D

E

F

H

A - Safety inlet NO 40
B - Safety outlet NO 32
C - Overflow line NO 40

(has to lead to the boiler
room)

D - Air vent
E - Throttle valve
F - Open expansion vessel OPC
G - Main flow

H - Return flow
I - Thermal insulation

OPC

To the boiler

room

G

LEGEND:

I

TEHNIKA GRIJANJA

!

10

Connection scheme

Technical instructions EKO-CKS 500

11

Connection scheme

Figure 4. General connection plan of the EKO-CKS boiler to the heating system

B

E

F

A

C

D

J

H

G

cca. 300mm

I

K

T

T

T

L

TEHNIKA GRIJANJA

!

....

Probe

position

Boiler

regulation

A - Main flow
B - Return flow
C - Safety line
D - Safety pump
E - Pipe thermostat

(operat. temp. 0-60°C)

F - 4-way manual mixing valve

G - Circulation pump – according.to the system
H - Safety main flow (to open expansion v.)
I - Safety return flow (from open expansion v.)
J - Stop valve
K - Thermal insulation of the safety boiler circuit
L - Thermal insulation of the safety boiler circuit
T - Thermometer

LEGEND:

NOTE: Closing valves are not displayed on this plan.

Technical instructions EKO-CKS 500

12

Filling the system, casing assemblage, condensate output connection

6.0. FILLING THE SYSTEM

The boiler and the entire central heating system have to be filled with water
according to the HRN M.E2011 norm – table 4.
The system has to be air vented in order the water can circulate normally.

Assamblage of the thermal insulation and plastificied metal sheet coating can be
started after the all works with connection to the chimney and to the central heating
installation. Before assembling the boiler casing, the regulation has to be fixed. The order
of assembling is described on image 5 and with picture 7 and 9 and in the scheme which is
attached to the casing packed in the cardboard box.

7.0. CASING ASSEMBLAGE

8.0. CONNECTION OF THE CONDENSATE OUTPUT

During the first heating process, usually by means of solid fuel firing, when the
temperature in the boiler is below 65°C, a certain quantity of condensate produced by
water steam appears on the cold walls of the boiler. In order to let this condensate get out
of the boiler, in the left lower corner of the upper boiler's door (see image 3) there is an
output. It is connected by an ½“ outer thread to which a flexible plastic/gum pipe can be
connected which is draining the condensate into the plastic pot, or simply out of the boiler.

Technical instructions EKO-CKS 500

13

Assebling the boiler regulation

Figure 5. Figure 6.

9.0. ASSEMBLING THE BOILER REGULATION

TEHNIKA GRIJANJA

!

Regulation
box

Cover of
regulation box

3

Drill the
holes

Right upper front side
(option: left upper front
side) od casing cover

Upper side of

casing cover

Technical instructions EKO-CKS 500

Before assemblage of the boiler cover is neccesary on the right upper fron side of the cover drill
two holes (fi 3,2 mm) for screws and one bigger hole (fi 23 mm) for sensors of regulation.
Positions for holes are shown on figure 5.

After drilling holes is neccesary to put out regulation box cover (Figure 6.).

14

Assembling the boiler regulation

Figure 7. Assemblage of regulation to boiler

To make the sensors because of their limited length could pull up the socket on the
upper front side of the boiler, boiler regulation must be mounted to upper part of right upper
front side of the boiler (option: left). Other dimnesions is like on Figure 5.

TEHNIKA GRIJANJA

!

Tube for temperature

sensors

Safety
thermostat
sensor

Boiler EKO-CKS 500

3

Right upper front side
(option: left upper front
side) casing cover of the
boiler EKO-CKS

Regulation
thermostat
sensor

Thermometar
sensor

Thermosta of heating pump
sensor (turning on pump
on 75°C)

Technical instructions EKO-CKS 500

Fasten regulation box to right upper front side of casing cover with two screws 3,9x19
(Figure 7.) to previously drilled holes fi 3,2 (Figure 5.). Pull sensors of safety thermostat and
regulation thermostat throught previously drilled hole fi 23 (Figure 5). Fasten again regulation
box cover (Figure 8.).

15

Assemling the boiler regulation

Figure 8.

TEHNIKA GRIJANJA

!

Regulation
box

Regulation box
cover

Technical instructions EKO-CKS 500

B

A

A

A

A

C

C

C

C

C

C

C

D

D

B

Insert the lower lateral part of the insulation (1) and ( 2 )into the slit D in order it fits into the
lower boiler casing porter (see detail Y), in the same time put the lower part of the casing
into the lower slit.
Fix the upper lateral part of the insulation (3) and ( 4 )on to the upper porter of the boiler
(see detail Z), while the lower part of the upper lateral insulation plate is fixed on the porter
of the boiler according to the detail Y.
The sensor of the thermometer, operating and safety thermostat has to be inserted into the
probe on the upper side of the boiler and the upper front cover (5) has to be hanged over
the hooks A and fixed by screws B for the sides (3) on the casing. The same has to be
done with the upper back cover (6).
The stone wool has to be placed on the upper side of the boiler, then with the screw C fix
the U-profile (7), after that put the cover (8)on to the plate(3)and U-profile (7), then cover
(9)put into the slid of the cover (8) – detail X and recline on to U – profile (7).
The back side plates (11) and (12), and back upper plates (7) and (8) has to be fixed on the
boiler and fixed together by help of the screw C, successively to the lateral plates of the
boiler (2) and (4).
Before assembling the front plate the lower door has to be opened and the front plate (10)
has to be pulled over the door. After that the front plate has to be hanged over the hooks
(A) on the left and on the right side of the plate (1).

Slika 10. Assembling order for the casing of EKO-CKS 500 boiler

(4.2x16)
(fi 12x4.2)

factory installed

A

(4.2x32)

B

(3.9x9.5)

C

B

D

detail X

D

D

Nosač
oplate
donji

Nosač
oplate
gornji

detail Z

detail Y

1

3

1

3

B

2

1

2

3

4

3

4

5

6

7

8

9

13

12

11

14

C

C

C

C

C

C

9

10

TEHNIKA GRIJANJA

!

16

Assembling order for the casing

Technical instructions EKO-CKS 500

17

Boiler regulation

10.0. BOILER REGULATION

In order to obtain a regular and safe operation of the EKO-CKS 500 boiler connected with the
Cyclone CC and the exhaust fan there is a need to install the EKO-CK/CKB boiler regulation.
The regulation steer the start ups and stops of the fan, according to the set boiler temperature.

10.1. DESCRIPTION OF THE BOILER REGULATION

Technical instructions EKO-CKS 500

1. MAIN SWITCH

Switch with the signal light for starting and stopping the control unit.

2. FAN

Switch with the signal light for starting and stopping the fan (light if the switch is on).

3. CONTROL LIGHT OF THE FAN

If switch is on (position 2), light is on when the fan is working.

4. CIRCULATION PUMP

Switch with the signal light for starting and stopping the circulation pump (light if the switch
is on).

5. CONTROL LIGHT OF THE CIRCULATION PUMP

If switch is on (position 4), light is on when pump is working.

6. REGULATION THERMOSTATE OF THE BOILER

Interval of the boiler operating temperature regulation (30-90°C), is performed by turning
the button (position 6).

7. SAFETY THERMOSTAT

Switches off the fan if the boiler temperature exceeds 110°C-9°C; which protects the
system from break down.

In order to restart the fan, following has to be done:

- wait until the boiler temperature falls below 70°C.

-open the safety thermostat lid (position 7):

- press the red button
If the system switches off successively, let the authorized person check the system.

8. CONTROL LIGHT OF THE FAN

The light shall be switched on if the fan's operation is disturbed.

9. CONTROL LIGHT OF THE SAFETY PUMP

Light is on if safety pump of the boiler is working.

18

Assembling of the boiler regulation

10.2. CONNECTION THE BOILER REGULATION WITH THE FAN TO THE EL.

POWER NET

The boiler regulation should be connected to the fan according to the image 12. – scheme of
the connection the fan to the boiler regulation EKO-CK/CKB and to the electrical power net.

Slika 11. Control panel of the boiler regulation

TEHNIKA GRIJANJA

!

1

2

4

5

6 7

89

3

11.0. CYCLONE CC

The Cyclone produced by Centrometal d.o.o. is used to filter hard particle from the flue gases.

The cylone has to be connected to the flue gas exhaust behind the boiler. A general connection
scheme is shown on the image 2. Between the boiler and the cyclone, there also has to be built
in the klingerit-joint which is included in our standard delivery. Connect the absorbing part of
the cyclone to the upper connection point (flange), if it has not already been connected by the
manufacturer. Between the cyclone and the fan there a klingerit-joint has to be inserted (if it
has not already been built in by the manufacturer). The cyclone and the entire flue gas
installation have to be coated by thermal insulation made out of 40mm thick stone wool or
equivalent material.

11.2. CONNECTING THE CYCLONE

11.1. CONNECTING THE CYCLONE

The cyclone has neither movable nor parts subjected to wear and tear. On its lowest point
there is an opening for cleaning. When necessary (depending on the quantity of the exhaust
gases particles) it has to be opened and cleaned.

Technical instructions EKO-CKS 500

19

Fan

12.2. FAN CONNECTIONS

The connection to the pressure tubing system only with their connections is not allowed. It
is also not allowed to transfer additional burden to the fan through the tubing system. Pressure
tube connection of the fan has to be connected to the pressure tubing system by means of
elastic joints – compensators, which do not transfer vibrations. The tube connections and
tubes itself have to be airproof closed.

12.3. CONNECTION TO THE ELECTRICAL POWER NET

This connection has to be performed only by an authorized person. Technical data
concerning the motor are attached in the technical manual and are also written on the motor
body. The rotation sense of the fan drive is indicated on its casing and has to be considered.
The cable has to be protected from mechanical or other kind of damages, set in the proper way,
in order to avoid any damages. Connection plan to the electrical power net is shown on image

12.

12.4. STARTING THE FAN

First to be checked if the fan drive is properly fasten to the cyclone. Revolve the fan
manually and find out if it is rotating without touching any obstacle. The rotor is not allowed to
touch its housing! During its first start up it is necessary to start the fan when the draught
regulator is closed or otherwise closed air flow, in order to enable the motor to reach the speed
easier. During the first start up it is necessary to control the fan rotation sense (sense of the
arrow). It has also to be checked if during the start up some kind of strange noice are
appearing. Check the vibrations and find out if they are exceeding the normal range. The
damper for the balancing of the fan which is situated on the flue gas exhaust of the boiler and
should be put in the position which enables the flue gases temperature to reach minimum
160°C-180°C at nominal thermal output.

12.0. FAN

The fan takes out exhaust gases out of the boiler and pushes them to the chimney.

12.1. INSTALLING THE FAN

The fan is not allowed to be touched neither on the inlet or outlet opening nor on the fan axle
or on the electrical motor. There has to be enough space provided for the assemblage, for the
technician and his tools. The installation according to the image 1 to the cyclone outlet. After
assembling the fan drive has to be leveled.

Technical instructions EKO-CKS 500

20

Fan

While the motor is running it is necessary to control the temperature of the motor and its
bearings. The motor housing temperature should not exceed 70°C (constant operation). If the
bearings are getting warmer the fan has to be stopped and the reason for the exceed
temperature has to be found out and solve it.

12.5. TEMPERATURE OF THE FAN BEARINGS

12.6. MAINTAINING THE FAN

After each 6000 working hours, i.e. once in the year it is necessary to:
check the general condition of the fan; check all elements and screw joints; check all welding
points, especially those on the rotor; check the wear and tear of the motor housing and of the
rotor; check the condition of the compensator and belonging steering (tightness, wear and
tear). In case the spare parts are needed, they have to be cleaned previously.

12.7. THE ROTOR AND THE FAN'S HOUSING

Both parts are subjected to the wear and tear. The main reason is dust, i.e. the acid mixed
with the medium inside the tubes, steam and gases. The wear and tear grade depends on the
kind and quantity of the substance. During the rotation the rotor could slip out of its center,
which causes the damage of bearings, of the axle and of the rotor itself. Because of the
material wear and tear the solidity of the rotor can be minimized, which leads to its break down
as well as to a heavy damage of the fan. The rotor and the housing have to be checked once in
the month. During the operation process of the fan, there has to be pay special attention to its
smooth moving, i.e. the vibration level has to be checked. The cleaning of the rotor depends of
the dust quantity. Depending on general conditions (wear and tear of the rotor, higher dust
stickiness) the controls have to be repeated in shorter periods.

Technical instructions EKO-CKS 500

CONNECTION OF THE FAN TO THE EKO-CK/CKB REGULATION AND TO THE
ELECTRICAL POWER NET

L

1

Slika 12. Scheme of EKO-CK/CKB regulation and fan connections to the electrical power net.

L2L

3

N

L

N

L

N U1V1W

1

Supply 380 V

Heating

pump

Boiler safety

pump

Fan

5

RT 70°C

ST RT

CT

98

95

96

C

1

le

3 81

2

4

7 6

9

1 - Main switch
2 - Fan switch
3 - Control lamp of fan work
4 - Heating pump switch
5 - Control lamp of heating pump work
6 - Regulation thermostat
7 - Safety thermostat of boiler
8 - Control lamp of fam error
9 - Control lamp of safety pump work

CT - Tube thermostat
C1 - Contactor
le - Bimetal thermostat

21

Fan

Technical instructions EKO-CKS 500

22

Start up of the boiler

13.0. START UP OF THE BOILER

The start up has to be done by the person authorized on behalf of Centrometal d.o.o.

It is necessary the check if previous assemblage has been performed exactly according to
the requirements and description of this manual.

Additional following has to be check:

- the boiler and the central heating system have to be filled with water and air vented.

- the security elements are functioning and if they are correctly connected.

- the flue gas tube is well connected, insulated, and sealed.

- flue gas damper is properly set according to the chimney under pressure

- Are the cyclone and fan properly set to the boiler and the cyclone is well insulated.

- all objects, which eventually could have been left inside the boiler are removed (from the
combustion chamber, exhaust tubes, etc.). Some objects could have been put inside
during the assemblage for any reason and could negatively influence the functioning.

- the upper and lower door of the boiler and door of the primary air is well set (seal
properly).

- the primary air/cleaning door properly fits

- the air lid on the door for primary air can freely move – when boiler do not work must be
closed.

- the secondary air lid on the lower boiler door is closed

- the heating room has proper air circulation opening.

- the tube thermostat of the boiler's security pump is set to 65°C (the pump is functioning
from 0°C to 65°C)

- the tube thermostat of the heating circuit pump is set up to 75°C (the pump is functioning
above 75°C)

The start up procedure includes also:

- starting of at least one heating process during which the functioning of the lid in the flue
gas exhaust and the fan regulation thermostat has to be set, so that the temperature
inside the boiler during a normal firing process does not exceed 90°C and does not
decrease below 75°C.

- check the outlet water temperature during functioning, because this temperature should
not be under 60°C. If it happens the system should be accordingly set up.

- secondary air flow opening is set (can also be closed)

- training the person in charge of the boiler room, training protocol signed by the trained

person.

Technical instructions EKO-CKS 500

23

Firing the boiler, cleaning and maintaning

14.0. FIRING THE BOILER

The boiler is constructed to be manual fired by means of solid fuel. Nominal thermal
output is obtained through solid fuel and its lower calorific value Hd>15000 kJ/Kg.
After the initial firing the fuel has to be supplied in the way the boiler reaches the

temperature of 70°C as soon as possible in order to minimize the intensity of the initial
condensation.
The functioning of the lid in the flue gas exhaust has to be set in the way the temperature
inside the boiler during the normal combustion does not exceed 90°C and does not fall
below 75°C.
It is also necessary to take care of the outlet water temperature during the operation,
because it should not fall under 60°C.
Additional regulation of the combustion quality can also be reached by setting the
secondary air opening.
Between two firing, it is recommended to pass over the glow with the poker in order to
obtain a balanced fresh air supply. It is also necessary to take care of all other previously
mentioned points of this technical manual.
The fuel has to be dry as usually recommended for this kind of firing, for example, two
years long air dried wood, i.e. the wood has to contain less then 30% humidity.

The space under the grate and the combustion chamber has to be cleaned every
day. The space under the grate can be cleaned through the primary air/cleaning door,
which previously has to be removed without separating the chain of the draught regulator.
Clean of the flue exhaust tubes of the second and third passage when necessary or once a
week through the upper boiler door with the brush which has to be pushed through the
whole length of the tube. On the back side of the boiler there is another opening for
cleaning (see page 3.) through which is possible to remove the material which has been
collected during firing as well as during the cleaning process. The hole can be approached
by removing M8 screws and cover.
If there is a possibility of freezing, the boiler has to be fired constantly. Draining the water

out of the system is absolutely not the right solution, because this would cause corrosion of
the entire central heating system as well of the boiler's interior.

15.0. CLEANING AND MAINTAINING

Technical instructions EKO-CKS 500

HEATING TECHNIQUE

Centrometal d.o.o. Glavna 12, 40306 Macinec, Croatia

central tel: [phone], fax: [phone]
service tel: [phone], fax: [phone]

Centrometal d.o.o. shall not be responsible for possible incorrect data caused by printing errors or error made in transcription and all figures and diagrams are for
explanatory purposes only and relevant adjustment have to be made at the spot. In any case, it reserves the right to modify its products as deemed to be required
and useful without any prior notification.