Immergas HERCULES SOLAR 26 2 ErP, Instruction And Recommendation Booklet

33

3-2

1    

5    

2    

3    

4    

6    

7    

10    

9

8

CH ON

INS

TALLER

US

ER

MAINTEN

AN

CE TECHNI

CI

AN

Key:

A4  -  Display board

A10  -  Pump relay board

A11  -  Interface board PT1000

B1  -  Flow probe

B2  -  Domestic hot water probe

B4  -  External probe (optional)

B10  -  Flue probe

B11  -  Solar collector probe (PT1000)

B12  -  Storage tank solar probe

E1  -  Ignition electrodes

E2  -  Detection electrode

E4  -  Safety thermostat

F1  -  Phase fuse

G2  - Igniter

M1  -  Boiler circulator pump

M2  -  Central heating pump

M6  -  Solar circuit circulator

M20  - Fan

M30  -  Three-way valve

R9  - Return probe unabling resistance

R14  - Solar configuration resistance

R15  -  Solar collector probe unabling 

resistance

S5  -  System pressure switch

S20  -  Room thermostat (optional)

T1  -  Boiler PCB transformer

X40  -  Room thermostat jumper

Y1  -  Gas valve

Z1  -  Antijamming filter

  BK -  Black

  BL -  Blue

  BR -  Brown

  G -  Green

  GY -  Grey

 G/Y -  Green-Yellow

  OR -  Orange

  P -  Purple

  PK -  Pink

  R -  Red

  W -  White

  Y -  Yellow

Remote controls: the boiler is designed for use 

with the Comando Amico Remoto remote 

control 

V2 

(CAR

V2

) or alternatively the Super 

Comando Amico Remoto remote control, which 

must be connected to clamps 42 and 43 of con-

nector X15 on the P.C.B., observing polarity and 

eliminating jumper X40.
Room thermostat: the boiler is designed for the 

application of the Room Thermostat (S20). Con-

nect it to clamps 40 – 41 eliminating jumper X40.
The connector X5 is used for the connection to 

the relay board.
The connector X6 is for connection to a personal 

computer.
The connector X8 is used for software updating 

operations.
Solar collector probe: the boiler is set-up for the 

connection to a solar panel system; the probe 

must be connected to clamps 45 and 46, eliminat-

ing resistance R15.

3.3 TROUBLESHOOTING.

N.B.:

 maintenance operations must be carried 

out by an authorised company (e.g. Authorised 

After-Sales Technical Assistance Service).

-  Smell of gas. Caused by leakage from gas circuit 

pipelines. Check sealing efficiency of gas intake 

circuit.

- Repeated ignition blocks. No gas, check the 

presence of pressure in the network and that 

the gas adduction cock is open. Incorrect 

adjustment of the gas cock, check the correct 

calibration of the gas valve.

- Irregular combustion or noisiness. It may be 

caused by: a dirty burner, incorrect combustion 

parameters, intake-exhaust terminal not cor-

rectly installed. Clean the above components 

and ensure correct installation of the terminal, 

check correct setting of the gas valve (Off-Set 

setting) and correct percentage of CO

2

 in flue 

gas.

- Frequent interventions of the overheating 

safety thermostat. 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.

- Drain trap clogged. This may be caused by 

dirt or combustion products deposited inside. 

Check, by means of the condensate drain cap, 

that there are no residues of material blocking 

the flow of condensate.

- Heat exchanger clogged. This may be caused 

by the drain trap being blocked. Check, by 

means of the condensate drain cap, that there 

are no residues of material blocking the flow of 

condensate.

-  Noise due to air in the system. Check opening 

of the special air vent valve cap (Part. 39 Fig. 

1-33). Make sure the system pressure and ex-

pansion vessel pre-charge values are within the 

set limits; The factory-set pressure values of the 

expansion vessel must be 1.0 bar, the value of 

system pressure must be between 1 and 1.2 bar. 

Check that system filling and air bleeding has 

been performed according to the requirements.

- Noise due to air inside the condensation 

module. Use the manual air vent valve (Part. 

38 Fig. 1-33) to eliminate any air present in the 

condensation module. When the operation has 

been performed, close the manual vent valve.

- Domestic hot water probe faulty. In order to 

replace the DHW probe, the storage tank does 

not have to be emptied as the probe is not in 

direct contact with the DHW inside the storage 

tank.

3.2  WIRING DIAGRAM.

1  -  230 Vac 50 Hz power 

supply

2  -  Super CAR (Optional)

3  -  Status signal

4  -  IMG BUS connection

5  -  System supervisor con-

nection

6  -  Supervisor connection 

active

7  -  External probe connec-

tion active

8  -  Domestic hot water

9  -  Central heating

  10  -  S34 setting