E.C.A. Confeo Premix CP 24 HST, Confeo Premix CP 30 HST Installation And User's Operating Instructions

High-efficiency Condensing Boilers (compatible with external DHW tank)

Confeo Premix CP 24 HST Confeo Premix CP 30 HST

24 kW Central Heating Output 30 kW Central Heating Output 26 kW Domestic Hot Water Output 31 kW Domestic Hot Water Output

INSTALLATION AND USER’S OPERATING INSTRUCTIONS

CONTENTS

PREFACE GUARANTEE & SERVICE SYMBOLS’ DEFINITIONS SAFETY INSTRUCTIONS AND WARNINGS PRODUCT

General Specifications Product Notation Technical Data

BOILER PACKAGING INSTALLATION

Selection Of The Boiler Location Mounting The Boiler

CONNECTIONS

Condensate Connection Flue Connection Gas Supply & Water Systems Electricity Supply

COMMISSIONING

Final Checks And Operations Before Boiler Start-up Control Panel Operating The Boiler Combustion Check & Gas Valve Adjusments

GAS TYPE CONVERSION FAULT & FAILURE FINDING MAINTENANCE STANDARDS AND REGULATIONS APPENDIX

PREFACE

Confeo Premix high-efficiency condensing boilers have been designed for providing efficient, safe and comfortable central heating (CH) and domestic hot water (DHW). The boilers are suitable for room ventilated or room sealed operation and are supplied for use with either natural gas or LPG.

This manual contains installation and user’s operating instructions. The detailed information about technical data, selection of the boiler location, fitting the connections (water systems, gas supply, flue connection and electric

ity supply), maintenance and fault & failure finding are placed in your manual. Please read the instructions carefully for operating the boiler a long time period and to maximize benefit from the boiler specifications.

Please keep all your documents safe.

GUARANTEE & SERVICE

 The appliance has guarantee period against faulty workmanship or material in condition that the

instructions and precautions in this manual must be obeyed. The service operations and general maintenance must be carried out only by qualified person.

 Th

e warranty certificate must be registered by Service in the installation day.

 Your appliance need not any repairs if operated according to this manual. For assistance or

additional information, consult qualified person, installer or gas supplier.

SYMBOLS’ DEFINITIONS

The symbols have been placed on particular points to make some instructions more noticeable. The symbols’ definitions are described as follows:

 - CAUTION: Property damage and/or non-severe injury can happen.

 - WARNING: Severe injury or death can happen.

 : The important explanations to be considered by users.

 : The situations that can only be interfered by qualified person.

SAFETY INSTRUCTIONS AND PRECAUTIONS

Safety Instructions

 When a gas leak is found or suspected:

- Turn off the gas valve of the boiler and other appliances which operate with gas.

- Shut off the oven, cooker and similar appliances to put their flame out.

- Do not light match, lighter etc. and put cigarette out.

- Allow fresh air into the room by opening doors and windows.

- Do not touch the electrical appliances’ switches and plugs.

- Turn off gas supply at the gas meter.

- Do not use telephones in the environment where a gas leak is suspected.

- Call your qualifie

d person as soon as possible.

 Do not place and use flammable and explosive liquid or materials around the boiler.

 Keep soap and water solution away from electrical connections during cleaning, gas leak test

etc.

 Do not block air vents, openings made in the walls of the room, which provide fresh air to the

installation room.

 Do not lay the LPG container down.

Water Systems & Gas Supply Line

 Before installation of the boiler, the water systems (CH and DHW circuit) and gas supply line

must be completed in accordance

with the relevant regulations and standarts by user.

Gas Type Conversion

 The appliance should be purchased depending on operating gas type. In case of a demanding gas

type conversion, this is made with charge.

 Gas type conversion from LPG to natural gas or from natural gas to LPG must be carried out

only by qualified person. After gas type conversion, gas leak test must be performed by qualified person.

 Maximum pressure regulator must be sealed and the self-adhesive conversion label must be

placed on the boiler after gas type conversion.

Installation

 The boiler must be installed in accordance with national and local requirements, gas safety

regulations, relevant standarts and this manual by qualified installer.

 The appliance should be mounted against a closed wall.

 The appliance must be positioned so that the plug is accessible.

 The appliance should not be positioned having a direct contact to steam or gases.

 Any change of flue position must not be made without consulting qualified person.

Boiler Start-up

 Boiler start-up must be performed certainly by qualified person.

 Gas type (natural gas / LPG), gas supply pressure (mbar) and electricity supply voltage (V) data

which are detailed on the information plate must be suitable with mains supply conditions. This is checked by qualified person.

 Before connecting the flue, siphon must be filled with water to prevent the risk of flue gases

escaping into the installation room.

 Lubricate the internal parts of the seals before the assembling of the air /

flue ducts.

 After boiler start-up, you should request information about operating the boiler and safety

precautions from qualified person.

Operating The Boiler And Maintenance

 Read carefully instructions and precautions in this manual against wrong usage which causes

unsafe conditions.

 The boiler should be checked and serviced for general maintenance once a year. Maintenance

and service operations must be carried out only by qualified person.

 Only a damp cloth should be used for cleaning the outer surface of the boiler and then t

he surfaces should be dried completely. Do not use chemical subtances or solutions which cause rust and scratches in your appliance.

PRODUCT

General Specifications

Main board provides all the functionality and safety of the boiler. The board drives gas valve, fan, pump and 3-way valve. Flame in the burner is checked regularly.

Control panel

has been designed ergonomically. It provides user friendliness. Display panel has blue backlight LCD Display and 3 Yellow Status LEDs. Operation modes, actual and setpoint CH temperature, setpoint DHW temperature, error codes and CH water pressure value can be seen on LCD display.

The safety systems in your appliance provide entire safety for you and your appliance. The safety systems are:

 Flue Gas Over-heat Safety System (105

 Flame Failure Safety System  Boiler Ov

er-heat Safety System (2 levels: 950C and 1050C)

 DHW (Domestic Hot Water) Over-heat Safety System  High Water Pressure Protection System (3 bar)  Low Water Pressure Protection System (0,6 bar)  High Voltage Protection System (260 VAC)  Low Voltage Protection System (160 VAC)  EMC (Electromagnetic Compatibility) Filter  Thermal Accumalation Protection System (with by-pass circuit and “pump over-run”)  Frost Protection System (The appliance must be on stand-by to activate the frost protection)  Water Flow Supervision 

Pump Dry Run Protection System (0,4 bar)

 Pump Anti-sticking Function  3 Way Valve Anti-sticking Function  Automatic Air Vent  Expansion Vessel (10 liters)

1- Stainless steel heat exchanger 12- Igniter 2- Air / gas manifold 13- Ignition electrodes 3- Fan 14- Ionization electrode 4- Pump 15- Flue gas NTC sensor 5- Hydraulic circuit – flow manifold 16- Hydraulic circuit – return manifold 6- Gas valve 17- Manual air vent 7- Water pressure sensor 8- CH flow NTC sensor – immersion type

19- Expansion vessel (10 liters)

9- CH return NTC sensor – surface type

20- Siphon

10- Thermal cut-off 160

21- DHW tank flow pipe

11- Air / gas mixer

22- DHW tank return pipe

Product Notation

Table 1

Notation Description

CP 24 HST

Confeo Premix High-efficiency Condensing Boilers

- 24 kW Central Heating Output

- 26 kW Domestic Hot Water Output

CP 30 HST

Confeo Premix High-efficiency Condensing Boilers

- 30 kW Central Heating Output

- 31 kW Domestic Hot Water Output

Technical Data

Confoe Premix high-efficiency condensing boilers are suitable for room ventilated (B Type) or room sealed (C Type) operation.

 C type boilers (

13(x)

, C

33(x)

, C

43(x)

, C

53(x)

, C

63(x)

, C

83(x)

) are air independent gas appliances. Required fresh air for combustion is provided independently from the installation room by the air supply ducts and products of combustion is discharged by the flue gas ducts.

 B type boliers (

B23, B33) are room air dependent gas appliances. Combustion air is provided from

the installation room and products of combustion is discharged by means of the flue gas ducts.

Table 2

CP 24 HST CP 30 HST

Unit

Gas Category*

Boiler Type

Type of gas

Performances

CH Min. Heat Output (80/60

CH Max. Heat Output (80/60

CH Min. Heat Output (50/30

CH Max. Heat Output (50/30

C) CH Min. Heat Input CH Max. Heat Input

DHW Min. Heat Output DHW Max. Heat Output DHW Min. Heat Input DHW Max. Heat Input

Gas Consumption**

Natural Gas (Max. Load) Natural Gas (Min. Load) Propane (Max. Load) Propane (Min. Load)

Gas Supply Pressure

Natural Gas (G 20) Propane (G 31)

Domestic Hot Water

Set T

emperatu

re Range

Central Heating

Min. Operating Pressure Max. Operating Pressure Set Temperature Range

General

Electrical Supply Electrical Power Consumption Expansion Vessel Dimensions (HxWxL) Weight (Net)

2H3P

B23, B

13(x)

, C

33(x)

, C

43(x)

53(x)

, C

63(x)

, C

83(x)

2H3P

B23, B

13(x)

, C

33(x)

, C

43(x)

53(x)

, C

63(x)

, C

83(x)

kW kW kW kW kW kW

kW kW kW kW

/h kg/h kg/h

mbar mbar

bar bar

VAC/Hz

watt

ltr

G 20

6,6

22,2

7,3

6,8

22,8

6,7

6,8

G 31

7,9

22,2

8,8

8,2

22,8

8,2

G 20

8,1

27,3

8,4

8,2

8,4

G 31

9,6 27,3 10,8

30 10 28

9,7

31 10 32

2,38 0,71 1,77 0,64

20 37

35-60

30-80

230V AC- 50Hz

115

750x454x365

42,6

2,92 0,88 2,17 0,77

20 37

35-60

30-80

230V AC- 50Hz

115

750x454x365

*the following gas categories can also be used

CP 24 HST - CP 30 HST

Gas Category

2L3P

, II

2L3B/P

, II

2H3B/P

, II

2H3+

, II

2Esi3+

2ELL3B/P

, II

2ELL3P

, II

2E+3P

, II

2E+3B/P

, II

2E+3+

,II

2Esi3P

**For gas consumption calculation; Natural gas: Hu=9,59 kWh/m

Propane: Hu=12,91 kWh/kg

fig. 1

agram

BOILER PACKAGING

CAUTION: The instructions on the boiler package should be considered during

transportation and storage.

- The product is covered with a cardboard box of which dimensions are 867x522x447 (HxWxL) mm and supported by upper and lower styrofoams (fig. 2a).

a) b)

fig. 2

 The required parts (Wall bracket, 4 pieces gasket for water and gas connections and screews) for

installation of the boiler are put into the upper styrofoam (fig. 2b). The other parts which seen in the fig.2b are optional. The optional parts are:

a) Mounting brack

et b) CH connecting pipes (3/4’’, 2 pieces) c) Water supply pipe (1/2’’, 1 piece) d) Gas supply pipe (3/4’’, 1 piece) e) Nipples (1/2’’, 1 pieces – 3/4’’, 3 pieces) which are held with spring clips. h) 2 pieces ½” gasket, 6 pieces ¾” gasket for water and gas connections.

)

INSTALLATION

Selection Of The Boiler Location

The boiler must be installed in accordance with gas safety regulations and relevant standards. Additionally, the clearances around the boiler should be as shown in fig. 4 in order to make service, maintenance and usage easier.

 Fig. 4 indicates minumum clearances from the ceiling and the sides.

a) b)

fig. 4

WARNING: The appliance must be positioned so that the plug is accessible.

- The appliance should be mounted against a closed wall.

- The outer surface of the boiler do not exceed 85

C in maximum running mode so do not take

additional precautions againts constructional materials (combustible materials).

WARNING: For room sealed operation, the boiler location and air/flue terminal

position must obey national and local requirements, gas safety

regulations and relevant standarts.

 The room sealed operation boiler is not suitable for external installation. It should be within in

the building.

- In case of gas leakage, it is necessary to vent the installation room according to national and local requirements, although the room sealed opearation boilers are independent of room volume and ventilation.

WARNING: Do not block the air ven

ts which provide fresh air to the installation room.



The air/flue terminal must be exposed to the external air and allow free passage of air cross it at

all times.

- The minumum acceptable dimensions from the terminal to obstructions and ventilation openings must obey national and local requirements.

- All horizantally fitted ducts (air/flue) should be fitted at a slight 2

or 30upwards incline to allow

condensate water drain to the boiler.

:The flue ducts are always wet.

:In cold or humid weather, water vapou

r in the flue gas may condense

while leaving the flue terminal.

WARNING: For room ventilated operation, the boiler location and flue gas discharge

connections must obey national and local requirements, gas safety

regulations and relevant standarts.

 Room ventilated operation boilers must not be installed in a bedroom, bedsitting room,

bathroom or in a room containing a bath or shower and also the installation room must not contain inflammable or explosive liquid or materials. The boiler should not be installed in rooms with hig

level of dust or humidity.

 General requirements for the installation room of the room ventilated boilers: The installation

room must have 1 m

volume for each 1 kW heat output. Therefore, The installation room must

have 24 m

volume at least for boilers of 24 kW heat output (fig. 5a). Also, a permanent air vent

connected to external air with cross-section area of 150 cm

is required.

- If volume of the room is less than 1m

/kW that means the volume is less than 24 m3for boilers of

24 kW heat output,

2 additional permanent air vents connected to adjacent room with cross-section

areas of 150 cm

are required, one at high level and one at low level. The adjacent room must not be a bathroom, bedsitting room or bedroom. The total volume of the installation room and the adjacent room must be more than 24 m

as well. The additional air vents should be on the same wall (fig. 5b).

WARNING: Do not block the air vents which provide fresh air to the installation room.

a) Volume of installation room ≥ 1m

/kW b) Volume of room represented by 1 ≤ 1m3/kW

Total volume of rooms 1 and 2 ≥ 1m

/kW

(installation room is represented by 1)

(adjacent room is represented by 2)

fig. 5 (please see also fig.18)

Mounting The Boiler

Having determined the boiler location,

- Use the paper template to mark out the positions of the fixing holes of wall and mounting brackets (the mounting bracket is an optional part).

- Drill the wall and fix the wall bracket to the wall with the 3 screws, then also the mounting bracket with the 2 screws.

- Hang the boiler up on the wall bracket.

a) b)

fig. 6

CONNECTIONS

Condensate Connection

:All condensing boilers generate condensate discharge. The amount of

condensate water depends on the working conditions of your appliance. This can be up to 1,7 litres of condensate water an hour.

- A plastic pipe should be fixed to the outlet pipe of the siphon and the pipe should be connected to the drain line.

If National and local requirements do not allow this such a connection, the

outlet pipe of the siphon should be open connection and should not be closed/blocked.

- If the pipe work is not terminated within the building, the pipe must be insulated against freezing.

- The connecting pipes and the fittings must be made of plastic material only.

- All horizontal pipes must be connected at a slight 2

or 30downwards incline to ensure a good

flow.

 Before connecting the flue, pour approximately 1 liter of water into the flue gas outlet to fill the

siphon (fig. 7). This prevents the risk of flue gases escaping into the insallation room.

WARNING: Before connecting the flue, siphon must be filled with water to prevent

the risk of flue gases escaping into the installation room.

fig. 7

National and local requirements should be take into consideration.

Flue Connection

 4 different types of air/flue system can be designed for Confeo Premix high-efficiency

condensing boilers:

a) The air/flue system is designed by horizontal concentric ducts b) The air/flue system is designed by vertical concentric ducts c) The air/flue system is designed by two separate ducts (twin connection) d) Room ventilated operation (air supply from boiler room)

: The air/flue kit, given with your appliance, is only suitable for horizontal air/flue design

. For the other types, you should order

required accessories from qualified service.

Connection by horizontal concentric ducts

- The concentric vertical adapter (φ80/125mm) allows the 90

Concentric elbow (φ80/125mm) 360

free rotation (fig. 8).

- The standard horizontal air/flue kit parts shown in fig. 3.

:All horizontally fitted ducts (air/flue) should be fitted at a slight 2

or 30upwards incline to allow condensate water drain to the boiler.

fig. 8

fig. 9

(

( (

fig. 10

(B)

for CP 24 HM-P

4 m for CP 30 HM-P and 5 m for CP 35 HM-P models.

fig. 11

fig. 13 (a)

fig. 13

fig. 14

fig. 15

 If the air/flue kit length is insufficient, additional flue accessories should be ordered through

qualified service. Do not use any other type / brand name of flue parts.

- The twin kit accessories (fig 16): a) Concentric extension, L=500 mm

Concentric extension, L=1000 mm

b) 90

Concentric elbow, φ80 mm

c) 45

Concentric elbow, φ80 mm

d) Pitched roof outlet kit, φ80

a) b) c)

fig. 16

 The total length of the air ducts and flue ducts must not exceed 32 m.

[Lmax = a (air supply) + b (flue discharge) = 32 m]

fig. 17 [Lmax = a (air supply) + b (flue discharge) = 32 m]

Room ventilated operation (air supply from boiler room)

 B type kit: This kit is suitable for room air dependent application. Combustion air is provided from

the installation room and products of combustion is discharged by means of the flue gas ducts. a) Concentric vertical adapter with flange, (φ80/125mm) b) 90

Concentric elbow, (φ80/125mm) [(a) + (b)  (7006951232)]

c) Air / flue terminal for B type, (φ80/125mm) (7006951257) d) T adater (M-M-F), (φ80mm) (7006951289) e) Trap (φ80mm) (7006951290) f) Flexible Pipe (polypropylene, φ80mm) (7006951291) g) Centralizing spacer (nylon) (7006951292) h) Flue gas outlet terminal, L=1380 mm, from φ80 mm to φ80/125mm (7006951293)

fig. 18 [Lmax = a + b = 21 m]

The length of “a” should be less than 2 m.

- Please read page 14 for the selection of the boiler location.

WARNING: For room ventilated operation, the boiler location and flue gas discharge

connections must obey national and local requirements, gas safety

regulations and relevant standarts.

Gas Supply & Water Systems

- Water & gas connections as shown in fig. 19.

fig. 19

a) CH flow 3/4’’ b) DHW tank flow 3/4’’ c) Gas inlet 3/4’’ d) Water supply 1/2" e) DHW tank return 3/4’’ f) CH return 3/4’’

- A suitable valve should be mounted on the gas inlet, water supply and CH connections. In addition, a water filter should be mounted on CH (3/4”) return and water supply (1/2”).

- A plastic pipe should be fixed the outlet tap of the 3 bar relief valve and the pipe should be connected to the drain line.

- The connection between the appliance and gas supply must be made with a flexible pipe.

1) 2)

National and local requirements should be take into consideration.

Electricity Supply

Electrical installation should be made according to the national and local instructions.

The boiler must be earthed and a standard 230 V AC - 50 Hz supply is required.

WARNING: Disconnect power supply to prevent electrical shock before connecting

the electricity supply.

WARNING: If the supply cord is damaged, it must be replaced by a special cord or

assembly available from the manufacturer or its service agent

Room Thermostat Connection (Optional)

It is possible to use one of the 2 different type of room thermostats together with your appliance optionally, for providing temperature control of the system.

 CM707 CHRONOTHERM  Room thermostat (7006901312)

Programmable digital room thermostat (7006901313)

→ 7-day program → a simple room thermostat (+10

C … +30 0C)

fig.20

- Room thermostat (number 1) connection is seen in the wiring diagram (fig.1).

- Disconnect the bridge in the connector (number 1 – X1A).

- Connect the room thermostat connections to the connector.

COMMISSIONING

Final Checks And Operations

: Having completed the installation and connections (condensate, flue,

electricity, supply, gas supply and water circuits) of the boiler

according to the authorized gas company regulations and relevant standards, the final checks and operations must be carried out by qualified person.

Filling the boiler and central heating circuit with water.

- Firstly, turn on all the radiator valves.

- Check inlet and outlet CH valves. The valves must be open.

- Ope

n the manual air vent on the top of the boiler (fig. 23).

- Open filling tap

slowly to fill the system.

- Turn off the manual air vent when water starts to squirt.

- Keep up filling until 1,5 – 2 bar water pressure.

- Turn off the filling tap.

CAUTION: Do not forget to turn off the filling tap, water can leak and

cause damage.

- Turn on the air vents on the radiators to set air free until water squirts. Repeat this process for all the radiators.

- Check the CH water pressure again, and turn on the filling tap to increase water pressu

re to

1,5 – 2 bar level.

- Check radiator vents whether any air in the water pipes or not. Air must be purged out entirely for efficient heating.

- Check any leakage in the radiator and the water pipes finally.

fig. 23

The filling tap is not available in some models based on national and local regulations.

Open hot water tap to check DHW circuit. Check any leakage water pipes.

Check whether flue kit is comprised of original parts or not according to the instructions and regulations.

In addition,

 Electricity connections of boiler must be earthed and suitable with main supply conditions (230 V AC - 50 Hz).

 Gas supply must be checked by the qualified gas company.

Call qualified service to boiler start-up after all these processes are completed.

: Boiler start-up must be performed certainly by qualified person.

: After boiler start-up, you

should request information about operating

the boiler and safety precautions from qualified person.

Control Panel

The control panel shown in fig. 24 consists of the following parts as detailed below.

fig. 24

ON/OFF Switch

The appliance is turned ON/OFF using the ON/OFF switch.

Display Panel: Blue Backlight LCD Display and 3 Yellow Status LEDs

a) Blue Backlight LCD Display (2-Digit)

Operation modes, actual and setpoint CH temperature, setpoint DHW temperature, error codes and CH water pressure value can be seen on LCD display (Table 3).

b) 3 Yellow Status LEDs

• Status LED

Central Heating (CH)

• Status LED Domestic Hot Water (DHW)

• Status LED Service Mode

• Status LED Comfort has no function because Comfort mode is not available in the HST models.

CH Temperature Control Potentiometer

The CH potentiometer has 3 functions (fig.25):

a) to set the CH water temperature between 300 C and 800 C.

:Setpoint CH water temperature can also be adjusted via external main

board communication, room thermostat. The CH potentiometer has no

effect anymore on the system if

the system has the room thermostat and also it is active. Additionally, CH potentiometer should be the maximum position.

b) to select summer / winter mode.

- The winter mode is in the range of 30 °C (min.) to 80 °C (max.).

- The summer mode can be activated by turning the CH potentiometer fully counter-clockwise.

Table 3

fig. 25

Stand-by Mode: When there is no heat

demand for central heating (CH) or domestic hot water (DHW). LCD display shows actual CH flow temperature (default).

CH mode: LCD display shows actual CH flow temperature and status LED CH is ON.

DHW mode: While DHW mode is active, status LED DHW is ON.

Setpoint mode: LCD display shows setpoint

CH/DHW temperature when adjusting water temperature by the CH/DHW potentiometers. Left dot is flashing. After 10 seconds, LCD

display shows actual CH temperature.

Pressure mode: CH water pressure (bar) can be seen on the LCD display by pressing the pressure push-button. It remains active for 10 seconds.

Error mode: In case of error, error code appears automatically on the LCD display. The error code is flashed and Burner LED turns RED.

Service mode: If service mode is active, status LED Service is ON. This function is only for qualified person (not for users). Do not try enter the service mode.

c) The service mode is activated by turning the CH potentiometer fully clockwise. This function is

only for qualified person (not for users).

: Service mode can be used only by qualified person.

DHW Temperature Control Potentiometer

The DHW potentiometer has 2 functions (fig. 26):

a) to set the DHW water temperature between 35

C (min.) and 60 0 C (max.).

fig. 26

b) to activate DHW priority cancellation function.

- This mode can be activated by turning the DHW potentiometer fully counter-clockwise.

Pressure Push-button

The p

ressure push-button is used to display CH water pressure.

- Push the pressure push-button to see CH water pressure (bar) on the LCD display. The value remains active for 10 seconds on the LCD display (Table 3 – Pressure mode).

Reset Push-button / Burner LED

- Reset push-button is used to reset main board if the errors cause a lock-out condition.

- Burner LED shows flame and failure indication (RED / BLUE).

Transparent Control Panel Cover

Operating The Boiler

Start Up / Shut Off The Boiler

- Turn the ON/OFF switch to ‘ ON ’ position (fig. 27a). LCD display will turn ON and, Power-on sequence will be monitored for several seconds. After the power-on sequence is completed successfully, LCD display shows actual CH flow temperature. The status LEDs CH / DHW will be OFF to indicate the stand-by mode (Table 3 – Stand-by mode) if there’re neither DHW or CH request. If CH potentiometer is in winter mode, ignition sequence will be s

tarted automatically to

fire the burner and then CH will be active.

fig. 27a

- In case of failed ignition, automatic ignition sequence is repeated 3 times. If all ignition trials are failed, “ No flame signal” lockout happens. The burner LED will turn RED and error code “

04 ”

will flash on the LCD display to indicate this error condition. Press the reset push-button to turn back the normal operation again. If the lockout condition continues after pressing the reset pushbutton, read the page of 45, Fault/error finding.

- Turn the ON/OFF switch to ‘ OFF ’ position (fig. 27b) to shut off the boiler. All LEDs and LCD display will turn OFF.

fig. 27b

CH (Central Heating) Mode

By adjusting the CH potentiometer, summer mode or winter mode can be selected.

a) Summer mode

- Rotate the CH potentio

meter to the ‘  ’ position. In the summer mode, any CH heat demands can

not be satisfied. The summer mode is only to satisfy domestic hot water demand.

b) Winter mode

- Rotate the CH potentiometer to the ‘  ’ position. In the winter mode, your appliance satisfies central heating and also domestic hot water (fig. 28a).

- Adjust any CH water flow temperature between 30oC and 80oC with the CH potentiometer. The setpoint value appears on the LCD display and left dot is flashing. After 10 seconds, actual CH water temperature will appear instead of the setpoint and left dot is disappeared. The boiler will modulate to the desired temperature (fig. 28a). If there is a DHW request, it interrupts the CH mode until DHW request is finished (fig.29a).

fig. 28a

- Rotate the CH potentiometer

fully counter-clockwise. The summer mode will be active and the

system will go back to stand-by mode again (fig. 28b).

fig. 28b

DHW (Domestic Hot Water) Mode

- DHW mode can be active whether the boiler is in stanby-by mode (fig. 27a) or CH mode is active (fig. 28a). Because DHW mode has priority over CH mode, DHW request interrupts the CH one, if DHW priority cancellation function is not active (see page 38).

- The DHW tank sensor should be assembled t

o the DHW tank. (The DHW tank is controlled by the

NTC sensor).

- Adjust any domestic hot water temperature between 35

C and 60 oC with the DHW potentiometer. The setpoint DHW temperature appears on the LCD display and left dot is flashing. After 10 seconds, actual CH water temperature will appear instead of the setpoint and left dot is disappeared.

- If there is a heat demand from the DHW tank NTC sensor, the boiler will produce hot water for th

e DHW tank (fig. 29a).

Tank loading ON

if DHW tank temperature (0C) < DHW set point (0C) – 50C

CH mode is active

LCD

DHW

OFF OFF

SERVICE

Stand-by

LCD

OFF

DHW

OFF OFF

SERVICE

fig. 29a

- When water temperature in the tank reaches the DHW setpoint, the boiler stops producing hot water for the DHW tank. And then, the appliance goes back to the previous mode (fig. 29b – fig. 29c).

Tank loading OFF if DHW tank temperature (0C) > DHW set point (0C)

fig. 29b

fig. 29c

DHW Priority Cancellation Function

DHW mode has priority over CH mode, but there is a DHW cancellation zone on the DHW potentiometer (fig. 26). In DHW cancellation zone, it is not possible to have domestic hot water even if there is a heat demand from the DHW tank NTC sensor.

DHW mode is active

LCD

OFF

DHW

ON OFF

SERVICE

Stand-by

LCD

OFF

DHW

OFF OFF

SERVICE

CH mode is active

LCD

DHW

OFF OFF

SERVICE

Frost Protection

The appliance goes on and off automatically depending on actual water temperature values measured by the sensors for protecting water circuits against freezing. This function protects both CH and DHW systems.

- When the appliance in stand-by mode and the CH flow sensor measures a low water temperature in the system (less than 5 °C), the boiler starts as if there was a CH demand. When the CH water temperature goes above 19 °C (measured on the CH fl

ow sensor), the CH demand will end (burner

will be off).

- The same situation occurs when DHW tank sensor measures less than 5 °C. The boiler starts and when the water temperature goes above 19 °C, the boiler will turn stand-by mode.

: The appliance must be on stand-by mode to activate frost protection

system.

Pump & 3 Way Valve Anti-sticking Function

Anti-sticking protection’s function prevents the pump from probable blocking when the pump stays inactive for a long period of time. This function goes on automatically if the pump has been inactive for at least 24 hours and runs the pump for a few seconds in CH mode.

The same principle is available for the 3 way valve. 3-way valve protection becomes active after permanent standstill of 24 hours and the 3-way valve changes his position against blocking.

Combustion Check & Gas Valve Adjusments

- Connect the flue gas analyzer to the sampling point which is located on the air/flue system (in the elbow, vertical adapter or twin adapter).

- Operate the boiler at maximum load (see page 42, Service Mode).

- Be sure that boiler is running at maximum load (→ maximum fan speed).

- Wait approximately 4 minutes for the stabilization of the values.

- Check the

CO2 value against the Table 4.

- If the CO2 value is not in the range (±0,2), gas valve adjusment is n

ecessary.

- Turn the flow adjustment screw (fig. 31) with 2,5 mm allen key counter-clockwise (in direction +) to increase or clockwise (in direction -) to decrease gas flow (CO

value) to the burner.

- Adjust the required CO

value (±0,1) according to the Table 5.

- Wait for the stabilization of the values

- Operate the boiler at minimum load (see page 42, Service Mode).

- Be sure that boiler is running at minimum load (→ minimum fan speed).

- Wait approximately 4 minutes for the stabilizaiton of the values.

- Check th

e CO2 value against the Table 4.

- If the CO2 value is not in the range (±0,2), gas valve adjusment is necessary.

- Turn the offset adjustment screw (fig. 31) with 2,5 mm allen key clockwise (in direction +) to increase or counter-clockwise (in direction -) to decrease min. CO2value.

- Adjust the required CO

value (±0,1) according to the Table 5.

- Wait for the stabilization of the values.

- Recheck the values at max. load and min. load because each adjustment changes the previous setting value (fig.30).

Tabl

e 4 Checking Values

Boiler Model

Natural Gas Propane

Fan Speed (rpm) CO2 (%) O2 (%) Fan Speed (rpm) CO2 (%) O2 (%)

Confeo Premix

CP 24 HST

1560

8,7 (±0,2) 5,6 (±0,3)

1800

9,9 (±0,2)

5,8 (±0,3)

4560

9,3 (±0,2)

4,5 (±0,3)

4320

10,9 (±0,2)

4,4 (±0,3)

Confeo Premix

CP 30 HST

1560

8,5 (±0,2) 6,1 (±0,3)

1860

9,7 (±0,2)

6,2 (±0,3)

4740

9,0 (±0,2)

5,1 (±0,3)

4380

10,8 (±0,2)

4,4 (±0,3)

Table 5 Setting Values

Boiler Model

Natural Gas Propane

Fan Speed (rpm) CO2 (%) O2 (%) Fan Speed (rpm) CO2 (%) O2 (%)

Confeo Premix

CP 24 HST

1560

8,7 (±0,1)

5,6 (±0,2)

1800

9,9 (±0,1)

5,8 (±0,2)

4560

9,3 (±0,1)

4,5 (±0,2)

4320

10,9 (±0,1)

4,4 (±0,2)

Confeo Premix

CP 30 HST

1560

8,5 (±0,1)

6,1 (±0,2)

1860

9,7 (±0,1)

6,2 (±0,2)

4740

9,0 (±0,1)

5,1 (±0,2)

4380

10,8 (±0,1)

4,4 (±0,2)

a) Flow Adjusment b) Offset Adjustment

fig. 30

fig. 31

 Service Mode

- Turn the CH potentiometer fully clockwise. Status LED Service will be ON (see Table 3).

- The softstart function (fan speed=2520 rpm) will be actice 90 seconds (for CP 24 HST) or 120 seconds (for CP 30 HST).

- After the softstart time ends, the boiler will run at the min. load.

- To operate the boiler at the max. load, turn the CH potentiometer to the winter mode and back again to the service mode position within 3 seconds. (If the CH potentiometer stays in winter operation, the main board will cancel the service

mode). The status LED Service will blink to

indicate the max. load.

- Each change-over between the Service mode ⇔ Winter mode within 3 seconds will change the boiler operation between the min. load ⇔ max. load.

- Service mode will be inactive after 10 minutes.

- It is possible cancel the softstart function (while boiler is running at the softstart function) by turning the CH potentiometer to the winter mode and back again to the left end position within 3 seconds.

: Service mode can be used only by qualified person.

GAS TYPE CONVERSION

: Gas type conversion from LPG to natural gas or from natural gas toLPG

must be carried out only by qualified person.

- Gas type conversion can be divided in 3 sections: replacement of the gas valve and gas restrictor, installation of the BCC and combustion check.

- Conversion kits comprise the following items:

- Gas valve

- Gas restrictor

- BCC

- Conversion label

-Conversion kits:

- LPG to Natural Gas for CP 24 HST

- LPG to Natural Gas for CP 30 HST

- Natural Gas to LPG for CP 24 HST

- Natural Gas to LPG for CP 30 HST

Replacement Of The Gas Valve And Gas Restrictor

WARNING: Keep the gas inlet valve and electricity supply closed during

replacement of the gas valve and gas restrictor.

- Shut off the boiler by turning the ON/OFF switch to OFF position and turn the gas inlet valve off.

- Undo the 2 screws which are located on the lower edge to remove the front panel.

- Undo the 2 screws which are located on the corners of the control panel.

- Pull the control panel outwards.

- Undo the 6 screws which are located around the body to remove the combustion body cover.

- Disconnect the electricity plug and the feedback connection from the gas valve.

- Replace the gas valve and gas restrictor according to fig. 32.

- Reassemble in the reverse order.

Table 6

Gas Restrictors

CP 24 HST - Natural Gas

∅ 5,9 mm

CP 24 HST – LPG

∅ 4,8 mm

CP 30 HST - Natural Gas

∅ 6,7 mm

CP 30 HST – LPG

∅ 5,5 mm

fig. 32

Installation Of The BCC

The BCC is a plug, which contains a programmed memory. The BCC is used to update the parameters of the main board when the appliance is converted to the another gas type.

- Shut off the boiler by turning the ON/OFF switch to OFF position.

- Undo the 2 screws which are located on the lower edge to remove the front panel.

- Undo the 2 screws which are located on the corners of the control panel.

- Lower the control panel.

- Remove the bottom part of the control panel (2 screws).

- Plug t

he BCC to main board (fig.1 wiring diagram → X9 connector).

- Reassemble in the reverse order.

fig. 33

The following steps are necessary to update the parameters of the main board:

- Power on the boiler by turning the ON/OFF switch to ON position.

- Burner LED will turn RED. The code “ 50 ” is flashed on the LCD display.

- Push the reset button to start copy process. Burner LED flashes (RED) once the display flashes the code “52”.

- Wait approximately 3 seconds.

- Push the reset buton again to reboot the system.

- After these steps the main board will do a reset and will then work with the new parameters from the BCC.

- If there

is a failure during the installation of the BCC the Burner LED stays ON (RED).

 Important Notes

- If the parameters of the main board is once modified with a BCC, the BCC must always plugged-in the main board. Otherwise the main board is forced into lockout condition until the original BCC or a BCC with another BCC-ID is plugged-in.

- Never plug-in or unplug the BCC during the boiler is ON.

- A later update with another BCC is possible.

- An undo to reactiviate the original parameters of the main board is not possi

ble.

Combustion Check

- See pages 39-40-41 for combustion check

WARNING: Maximum pressure regulator must be sealed and the self-adhesive

conversion label must be placed on the boiler after gas type

conversion.

WARNING: In case of gas leak, fire or explosion hazard, property damage,

severe injury or death can happen. Therefore, gas leak test must be performed by qualified person after gas type conversion.



GAS LEAK TEST

 Apply a rich soap and water solution to the surface of all pipe connections. Bubbles indicate a gas leak  In case of gas leak, tigh

ten the pipe connection.

 Check the pipe connection again for gas leak.  Replace the part/parts if gas leak can not be stopped.

CAUTION: Keep soap and water solution away from electrical connections during

gas leak test.

FAULT/ERROR FINDING

Several checks are included to protect the boiler and its environment. In case of error condition, the error code is flashed on the LCD display (Table 7), Burner LED shows failure indication (it turns

RED) and heat demands will be disabled.

 Error conditions can be divided in 2 groups: lockout conditions and blocking conditions.

a) Lockout conditions, Lockout flue gas overtemperature, Lockout boiler overtemperature, No

flame signal, Flame lo

ss, Flame simulation, Failure flow-return supervision, Failure gas valve circuit V1/V2, and Failure fan speed can only be cleared by pressing the reset push-button, then display panel will be in stand-by mode. If the problem continues, call qualified service. While in lockout conditions, Burner LED will turn RED.

b) Blocking conditions, Boiler overtemperature, Failure CH flow sensor (NTC), Failure flue gas sensor (NTC), Failure DHW tank sensor (NTC), Failure CH return sensor (NTC), Failure power supply, and Failure water pressure, will reset as soon as the cause of the problem disappears. For example, when CH water pressure is out of operating range, blocking condition will be generated and keep the system off until the pressure is within operating range again.

Table 7

Error/fault definitions

Error/fault

Codes

Temperatures

Lockout exhaust fume (flue gas) overtemperature

Lockout boiler overtemperature

Boiler overtemperature 06 Failure CH flow sensor (NTC) 12 Failure flue gas sensor (NTC) 13

Failure DHW tank sensor (NTC)

Failure CH return sensor (NTC)

Flame Detection

No flame signal 04 Flame loss 05 Flame simulation 11

Mains

Failure power supply

Water Pressure / Flow

Failure water pressure 40 Failure flow-return supervision 42

Gas Valve

Failure gas valve circuit V1/V2

Other

Failure fan speed 24 CRC error expert parameter 30 CRC error safety parameter 31 CRC error BCC-ID 34

BCC is missing

CRC error BCC-data

Different firmware BCC 37 Failure BCC- ID number 38 Failure BCC during installation 39

BCC activation 50

BCC copy

System error

Frost Protection

Table 8

Fault/Error and error code

Cause Solution

The boiler does not start up by turning the ON/OFF

switch to ‘ ON ‘ positi

on.

(LCD is not ON).

- Lack of electricity. - Check the electricity connections.

Lockout exhaust fume (flue gas) overtemperature

- Insufficient flue draught.

- Insufficient or no water

flow.

- The flue gas sensor is out of

operating range (The limit temperature is 1050C).

- Check the flue connections.

- Check the water circuits.

- Check the CH inlet valve and radiator valves whether it i

open or not.

- Press the reset push-button

- If the lockout conditi

continues after pressing the reset push-button, consult qualified service.

Lockout boiler overtemperature

- If the CH flow temperature

exceeds 1050C, Lockout boiler overtemperature error occurs.

- Check the water circuits.

- Check the CH inlet valve and radiator valves whether it i

open or not.

- Press the reset push-button

- If the lockout conditi

continues after pressing the reset push-button, consult qualified service.

Boiler overtemperature

- If the CH water temperature

exceeds 95

C, Boiler

overtemperature error occurs.

- Boiler will remain in thi

error mode till water temperature drops into operating range.

- If repeated, consult qualified service.

Failure CH flow sensor (NTC)

- A relevant wiring cable may

break off or become seperated from its connection.

- Relevant wiring cables may

be on contact.

- Consult qualified service.

Failure flue gas sensor (NTC)

- A relevant wiring cable may

break off or become seperated from its connection.

- Relevant wiring cables may

be on contact.

- Consult qualified service.

Table 8

Fault/Error and error code

Cause Solution

Failure DHW tank sensor (NTC)

- A relevant wiring cable may

break off or become seperated from its connection.

- Relevant wiring cables may

be on contact.

- Consult qualified service.

Failure CH return sensor (NTC)

- A relevant wiring cable may

break off or become seperated from its connection.

- Relevant wiring cables may

be on contact.

- Consult qualified service.

No flame signal

- No flame in burner after 3

ignition trials (burner start is unsuccessful).

- Press the reset push-button

- If the lockout conditi

continues after pressing the reset push-button, check the gas inlet and supply valves.

- Having all tries expire

consult qualified service.

Flame loss

- After safety time the flame

signal is missing.

- Press the reset push-button

- If the lockout conditi

continues after pressing the reset push-button, check the gas inlet and supply valves.

- Having all tries expire

consult qualified service.

Flame simulation

- A flame signal is seen

without the gasvalve being open.

- Press the reset push-button

- If the lockout conditi

continues after pressing the reset push-button, consult qualified service.

Failure power supply

- Low Mains voltage (less

than 160 VAC) will trigger this error.

- The system stays in blockin

condition until Mains voltage is back to nominal value.

Failure water pressure

- Operating water pressure is

not suitable for your appliance (less than 0,4 bar).

- Water pressure sensor i

damaged or not connected.

- The system stays in blockin

condition until water pressure is back to nominal value.

- Check the valves whether is open or not.

- Check circuits for leaks.

Table 8

Fault/Error and error code

Cause Solution

Failure flow-return supervision

- Insufficient or no water

flow.

- The pump is damaged or not

connected.

- Check circuits for leaks.

- Check the CH inlet valve whether it is open or not.

- Press the reset push-button

- If the lockout conditi

continues after pressing the reset push-button, consult qualified service.

Failure gas valve circuit V1/V2

- If check of gas valve circuit

fails, error will occur.

- Consult qualified service.

Failure fan speed

- The fan speed is out of

operating range.

- Consult qualified service.

CRC error expert parameter 30- Defective expert parameters.

A defective EPK-File or EPX-File is loaded wit

KMSoft

- Consult qualified service.

CRC error safety parameter 31- Defective safety parameters.

A defective EPB-File or EPXFile is loaded with KMSoft

- Consult qualified service.

CRC error BCC-ID

- BCC is not compatible for

this boiler. Wrong BCC i

plugged on.

- Consult qualified service.

BCC is missing

- BCC was installed and i

removed.

- Consult qualified service.

CRC error BCC-data

- Parameter on BCC has

changed or EEPROM lost the value.

- Consult qualified service.

Different Firmware BCC

- Software Firmware of the

Board and Firmware of the BCC are not equal.

- Consult qualified service.

Failure BCC- ID number

- BCC is not compatible for

this boiler. Wrong BCC i

plugged on.

- Consult qualified service.

Table 8

Fault/Error and error code

Cause Solution

Failure BCC during installation

- If there is a failure duri

the installation of the BCC.

- Consult qualified service.

BCC activation

- BCC activation procedure is

not completed.

- Consult qualified service.

BCC copy

- BCC activation procedure is

not completed.

- Consult qualified service.

System error

- Defective electronic board. - Consult qualified service.

4 4

If the temperature at the boiler sensor (Flow temperature) falls below 1°C, all actuators will be stopped.

Frost Protection

- CH NTC’s temperature is

below 0°C.

MAINTENANCE

- The boiler should be checked and serviced for general maintenance once a year. Maintenance and service operations must be carried out only by qualified person.

- Only a damp cloth should be used for cleaning the outer space of the boiler and then the surfaces should be dried completely. Do not use chemical subtances or solutions which cause rust in your appliance.

STANDARDS AND REGULATIONS

During the installation and operation of the boiler, the instructions and precautions detailed in this manual and also all relevant standards and regulations must be obeyed.

APPENDIX

Pump’s characteristic curve (height & flow)

fig. 34

Product specifications are subject to change without notice.

E.C.A. Confeo Premix CP 24 HST, Confeo Premix CP 30 HST Installation And User's Operating Instructions

Specifications and Main Features

Frequently Asked Questions

User Manual