MHTeam DH2-I-20C Manuel D'instruction page 7

Before starting any maintenance task, shut down, unplug and let the heater cool down for at least
15 minutes.
Do not attempt any electrical repair yourself. If the heater needs service or repair, contact a
qualified technician.
Do not use a faulty unit unless a qualified technician has inspected and repaired it.
When cleaning, make sure that water does not enter the unit.
Do not open the enclosure to clean the inner parts. Do not spray water into the heater.
Never use solvents, gasoline, toluene and similar aggressive chemicals to clean the heater.
The following checks BY QUALIFIED PERSONNEL ONLY are recommended before every seasonal use:
Nozzle
Carefully unscrew nozzle from nozzle fitting. Blow compressed air through nozzle orifice to free it from dirt. Replace
nozzle if necessary.
Air Filters
Clean air filters. Remove filter end cover (19), wash air intake filter (3) using a light detergent and dry it thoroughly
before reinstalling. Replace air delivery filter (6) once a year (Fig.2)
Ignition Electrodes
Clean, adjust and if necessary replace ignition electrode. For electrode gaps see Fig. 3-4 (dimensions in mm).
Fig.3
Compressor pressure adjustment (Fig. 5)
The compressor pressure is factory set and must be checked and adjusted by qualified technicians
only. Tampering with the unit may be dangerous.
Fig.2
Fig.4