Yearly Appliance Check And Maintenance; Variable Heat Output - Immergas NIKE MYTHOS 24 4 ERP Instruction And Warning Book

3.15 YEARLY APPLIANCE CHECK AND
MAINTENANCE.
e following checks and maintenance should
be performed at least once a year.
- Clean the ue side of the heat exchanger.
- Clean the main burner.
- Visually check the draught-breaker/anti-wind
device for deterioration or corrosion.
- Check ignition and operation.
- Check correct calibration of the burner in
domestic hot water and central heating phases.
- Check the operation of the appliance control
and adjustment devices and in particular:
- intervention of main electrical switch
positioned outside of the boiler;
- system control thermostat intervention;
- domestic hot water control thermostat
intervention.
- Check sealing e ciency of the gas circuit and
the internal system.
- Check the intervention of the device against no
gas ionisation ame control. Intervention time
must be less than 10 seconds.
- Visually check for water leaks or oxidation
from/on connections.
- Visually check that the water safety drain valves
is not blocked.

3.16 VARIABLE HEAT OUTPUT.

THERMAL
POWER
(kW) (kcal/h)
MAX. D.H.W. 23,6 20296
MAX. CEN. HEAT. 9,5 8170
OUTPUT 7,0 6020
N.B.: gas ow rates refer to heating power below
a temperature of 15°C and pressure of 1013 mbar.
Burner pressure values refer to use of gas at 15°C.
- Check that, a er discharging system pressure
and bringing it to zero (read on boiler pressure
gauge), the expansion vessel load is at 1.0 bar.
- Check that the system static pressure (with
system cold and a er re lling the system by
means of the lling valve) is between 1 and 1.2
bar.
- Visually check that the safety and control
devices have not been tampered with and/or
shorted, in particular:
- temperature safety thermostat;
- water pressure switch,
- ue exhaust control thermostat.
- Check the condition and integrity of the
electrical system and in particular:
- electrical power cables must 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.
METHANE (G20)
BURNER GAS PRESS. BURNER BURNER GAS
FLOW RATE NOZZLES FLOW RATE
(m 3 /h) (mbar) (mm H O) (kg/h)
2
2,78 12,60 128,5 2,08
1,17 2,50 25,5 0,87
0,88 1,50 15,3 0,65
19
BUTANE (G30) PROPANE (G31)
PRESS. BURNER BURNER GAS
NOZZLES FLOW RATE
(mbar) (mm H O) (kg/h) (mbar) (mm H
2
26,60 271,3 2,04 34,90
6,68 68,1 0,86
3,30 33,7 0,64
PRESS. BURNER
NOZZLES
O)
2
355,9
6,87 70,1
3,90 39,8