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11

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Boiler ignition

. Before ignition make sure the 

heating system is filled with water and that the 

manometer (7) indicates a pressure of 1 ÷ 1.2 bar.

- Open the gas cock upstream from the boiler.
- Press key (2) and set the boiler on Summer (

) or Winter ( ). 

 

N.B.:

 the button (2) must be pressed and 

held for the time required to switch from the 

Stand-by (  ), Summer (  ) or Winter (  ) 

function.

 

Attention:

 after each switch the button must 

in any case be released to switch to the next 

function.

When in summer position ( ) the domestic 

hot water temperature is adjusted with the but-

tons (3-4).
When the winter position is selected ( ) the 

system water temperature is adjusted with the 

buttons (5-6), whilst the domestic hot water 

temperature is adjusted using the buttons (3-4), 

by pressing (+) to increase and (-) to reduce the 

temperature.
From this moment the boiler functions auto-

matically. With no demand for heat (heating or 

domestic hot water production) the boiler goes 

to “standby” function, equivalent to the boiler 

being powered without presence of flame. Each 

time the boiler ignites, the relative flame present 

symbol is displayed (15).

2.5 TROUBLESHOOTING.

In the event of an anomaly the boiler backlight 

turns from green to red on and the relative error 

codes, listed in the table, flash on the display.

Anomaly signalled

code

error

No ignition block

01

Over-heating (safety) thermostat 

block

02

Flue safety thermostat anomaly

03

Electro-mechanical contacts

04

Flow probe anomaly

05

Insufficient system pressure

10

Parasite flame

20

Insufficient circulation

27

Loss of remote control commu-

nication

31

Ignition block.

 The boiler ignites automatically 

with each request for room heating or hot water 

production. If the burner does not ignite within 

10 seconds, the boiler goes into "ignition block" 

(code 01). To eliminate “ignition block” the Reset 

button (1) must be pressed. On commissioning 

or after extended appliance downtime, it may 

be necessary to eliminate the “ignition block”. If 

this phenomenon occurs frequently, contact an 

authorised company (e.g. Immergas After-Sales 

Technical Assistance Service).

Overheating thermostat block.

 During normal 

operation, if a fault causes excessive overheating 

internally, the boiler goes into overheating block 

(code 02). After allowing to cool, eliminate the 

"overheating block" by pressing the Reset key (1). 

If this phenomenon occurs frequently, contact an 

authorised company (e.g. Immergas After-Sales 

Technical Assistance Service).

Flue safety thermostat anomaly.

 If the flue 

evacuation pipe does not work properly during 

functioning, the flue thermostat intervenes by 

blocking the boiler (code 03). The boiler will 

automatically restart after 30 minutes if normal 

conditions resume without having to be reset. 

If the flue thermostat intervenes 3 times in less 

than two hours (code 03), it is necessary to reset 

the boiler manually by pressing the Reset button 

(1). If this anomaly persists, contact a qualified 

technician for assistance (e.g. Immergas After-

Sales Service).

Electro-mechanical contacts

 This occurs when 

the safety thermostat, the fume pressure switch or 

the system pressure switch do not work properly 

(code 04). The boiler does not start; try resetting 

the boiler. If the anomaly persists contact an 

authorised company (e.g. Immergas After-Sales 

Technical Assistance Service).

Delivery probe anomaly

 If the board detects an 

anomaly on the flow probe (code 05), the boiler 

will not start; contact an authorised company 

(e.g. Immergas After-Sales Technical Assistance 

Service).

Insufficient system pressure. 

Water pressure 

inside the heating system (code 10), sufficient to 

guarantee the correct functioning of the boiler, 

is not detected. Check that the system pressure 

is between 1÷1.2 bar.

Parasite flame.

 This occurs in the event of a leak 

on the detection circuit or anomaly in the flame 

control unit (code 20); try to reset the boiler. 

If the anomaly persists contact an authorised 

company (e.g. Immergas After-Sales Technical 

Assistance Service).

Insufficient water circulation. 

This occurs if 

the boiler overheats due to insufficient water 

circulating in the primary circuit (code 27); the 

causes can be:
- low system circulation; check that no shut-off 

devices are closed on the heating circuit and 

that the system is free of air (deaerated);

- pump blocked; free the pump.
If this phenomenon occurs frequently, contact an 

authorised company (e.g. Immergas After-Sales 

Technical Assistance Service).

Loss of Remote Control communication.

 This 

occurs 1 minute after loss of communication 

between the boiler and the remote control (code 

31). To reset the error code, remove and re-apply 

voltage to the boiler. If this phenomenon occurs 

frequently, contact an authorised company (e.g. 

Immergas After-Sales Technical Assistance 

Service).

Boiler shutdown.

 Press the button (2 Fig. 2-1) 

(

) until the symbol ( ) appears on the 

display.

N.B.:

 in these conditions the boiler is still 

powered.
Disconnect the external omnipolar boiler switch 

and close the gas cock upstream of the appliance. 

Never leave the boiler switched on if left unused 

for prolonged periods.

2.6  RESTORING CENTRAL HEATING 

SYSTEM PRESSURE.

Periodically check the system water pressure. 

The boiler manometer should read a pressure 

between 1 and 1.2 bar.

If the pressure is below 1 bar (with the circuit cool) 

restore normal pressure via the filling cock located 

in the lower part of the boiler (Fig. 2-2).

N.B.:

 close the filling cock after the operation.

If pressure values reach around 3 bar the safety 

valve may be activated.

In this case contact a professional technician 

for assistance.
In the event of frequent pressure drops, contact 

qualified staff for assistance to eliminate the pos-

sible system leakage.

2.7   SYSTEM DRAINING.

To drain the boiler, use the special draining 

valve (Fig. 2-2).

Before draining, ensure that the filling valve is 

closed.

Summary of Contents for NIKE MYTHOS 24 2 E

Page 1: ...NIKE MYTHOS 24 2 E IE Instruction and warning book 1 038789ENG ...

Page 2: ... technical information for installing Immergas boilers As for the other issues related to boiler installation e g safety in the work site environment protection injury prevention it is necessary to comply with the provisions specified in the regulations in force and principles of good practice In compliance with legislation in force the systems must be designed by qualified professionals within th...

Page 3: ...ing 11 2 6 Restoring central heating system pressure 11 2 7 System draining 11 2 8 Anti freeze protection 12 2 9 Case cleaning 12 2 10 Decommissioning 12 3 Boiler commissioning initial check 13 3 1 Hydraulic diagram 13 3 2 Wiring diagram 14 3 3 Troubleshooting 14 3 4 Converting the boiler to other types of gas 15 3 5 Checks following conversion to another type of gas 15 3 6 Possible adjustments 15...

Page 4: ...of malfunctions faults or incorrect operation turn the appliance off immediately and contact an authorised company e g the Immergas Technical Assistance centre which has specifically trained staff and original spare parts Do not attempt to modify or repair the appliance alone Failure to comply with the above implies personal responsibility and invalidates the warranty Installation regulations thes...

Page 5: ... gas cock connection by following the mounting instructions illustrated in the figure The gas supply pipe must be suitably dimensioned according to current regulations in order to guarantee correct gas flow to the burnereveninconditionsofmaximumgenerator output and to guarantee appliance efficiency technical specifications The coupling system must conform to standards Fuel gas quality The applianc...

Page 6: ... 1 4 REMOTE CONTROLS AND ROOM CHRONO THERMOSTATS OPTIONAL The boiler is prepared for the application of room chrono thermostats or remote controls which are available as optional kits Fig 1 4 All Immergas chrono thermostats are connected with 2 wires only Carefully read the user and assembly instructions contained in the accessory kit On Offdigitalchrono thermostat Thechrono thermostat allows set ...

Page 7: ...responding to the top of the chimney flue independently of any caps must be out of the backflow area in order to prevent the formation of counter pressures that impede the free discharge of the combustion products into the atmosphere It is therefore necessary to use the minimum heights indicated in the figures stated in the regulation depending on the slope of the roof Direct exhaust outside The n...

Page 8: ...p on first speed To ensure optimal boiler operation in the case of new systems single pipe and module it is recommended to use the pump at maximum speed The circulation pump is already fitted with a capacitor Pump release If after a prolonged period of inactivity the circulation pump is blocked unscrew the front cap and turn the motor shaft using a screwdriver Take great care during this operation...

Page 9: ... 5 Gas valve 6 System filling valve 7 Flue safety thermostat 8 Primary heat exchanger 9 Delivery probe 10 Safety thermostat 11 Combustion chamber 12 Ignition and detection electrodes 13 System expansion vessel 14 Burner 15 Vent valve 16 By pass 17 DHW heat exchanger 18 Three way valve motorised 19 3 bar safety valve 20 System draining valve N B connection group optional ...

Page 10: ... or other devices Never clean the appliance or connected parts with easily flammable substances Never leave containers or flammable substances in the same environment as the appliance It is prohibited and dangerous to obstruct the air intake even partially for the ventilation of the room in which the boiler is installed Due to the danger functioning is also prohibited in the same room as suction d...

Page 11: ... hours code 03 it is necessary to reset the boiler manually by pressing the Reset button 1 If this anomaly persists contact a qualified technician for assistance e g Immergas After Sales Service Electro mechanical contacts This occurs when thesafetythermostat thefumepressureswitchor the system pressure switch do not work properly code 04 The boiler does not start try resetting the boiler If the an...

Page 12: ... a prolonged absence the system must be drained completely or antifreeze substances must be added to the heating system water In both cases the boiler domestic hot wa ter circuit must be drained In systems that are drained frequently filling must be carried out with suitably treated water to eliminate hardness that can cause lime scale 2 9 CASE CLEANING Use damp cloths and neutral detergent to cle...

Page 13: ...iance e g a draught gauge positioned at the exit of the appliance combustion products check that there is no backflow of combustion products into the room even during functioning of fans 3 1 HYDRAULIC DIAGRAM Fig 3 1 ensure activation of all adjustment devices seal the gas flow rate regulation devices if settings are modified check the production of domestic hot water check sealing efficiency of w...

Page 14: ...ermostat It can depend on the lack of water in the boiler little water circulation in the system or blocked pump Check on the manometer that the system pressure is within established limits Check that the radiator valves are not closed and also the functionality of the pump The boiler produces condensate This can be caused by obstructions of the chimney or flues with height or section not proporti...

Page 15: ...se direction the heating potential increases and in an anti clockwise direction it decreases Adjust the boiler minimum heat output in the domestic hot water phase Fig 3 3 N B only proceed after having calibrated the nominal pressure Adjustment of the minimum thermal input is obtained by operating on the cross plastic screws 2 on the gas valve maintaining the brass nut blocked 3 disconnect the powe...

Page 16: ... boiler 2 monothermal boiler with boiler P9 3 8 AUTOMATIC SLOW IGNITION FUNCTION WITH TIMED RAMP DELIVERY In the ignition phase the P C B carries out an increasing gas delivery ramp with pressure values that depend on the type of gas selected with preset duration This prevents every calibration or precision adjustment of the boiler ignition phase in any conditions of use 3 9 CHIMNEY SWEEP FUNCTION...

Page 17: ...ing can be completely removed as follows Fig 3 4 remove the frame 1 holding the edges and pulling it towards you as indicated by the arrows undo the 2 front screws 2 and the 2 lower screws 3 which fasten the casing 4 pull the casing 4 towards yourself and upwards at the same time in order to detach it from the upper hooks ...

Page 18: ... be inside the fairleads there must be no traces of blackening or burning N B when performing periodical maintenance of the appliance it is also good practice to check and perform maintenance on the heating system in compliance with that indicated by the regulations in force N B gas flow rates refer to heating power below a temperature of 15 C and pressure of 1013 mbar Burner pressure values refer...

Page 19: ...justable central heating temperature C 38 85 System expansion vessel total volume l 4 2 Expansion vessel factory set pressure bar 1 Water content in generator l 1 9 Head available with 1000 l h flow rate kPa m H2 O 24 5 2 5 Hot water production useful heat output kW kcal h 23 6 20296 Domestic hot water adjustable temperature C 30 38 60 77 Domestic hot water circuit flow limiter at 2 bar l min 7 7 ...

Page 20: ...ode Sr N Serial Number CHK Check Cod PIN PIN code Type Type of installation ref CEN TR 1749 Qnw min Minimum heating capacity domestic Qn min Minimum heating capacity heating Qnw max Maximum heating capacity domestic Qn max Maximum heating capacity heating Pn min Minimum heat output Pn max Maximum heat output PMS Maximum pressure system PMW Maximum pressure domestic D Specific flow rate TM Maximum ...

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Page 24: ...immergas com Immergas S p A 42041 Brescello RE Italy Tel 0522 689011 Fax 0522 680617 Certified company ISO 9001 This instruction booklet is made of ecological paper Cod 1 038789ENG rev ST 002138 000 07 15 Inglese per IRLANDA IE ...

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