DORA TECH
90 LT - 120 LT
105
cod. 3540000800 - Rev. 02 - 09/2023
EN
Before carrying out the check, you must:
• Close the cold water inlet.
• Proceed with emptying the boiler (see par. “7.4 EMPTYING
• Remove the bottom cover 1.
• Disconnect the heating element safety thermostat electrical
connection from the power board and remove the water NTC
probes from the dedicated pipe in the element flange.
• Remove the flange by unscrewing the bolts 3. The corrosion
of the anode 4 can then be checked; if it affects more than 2/3
of the anode surface, proceed with replacement.
fig. 66
fig. 67
The flange has a special gasket which must be replaced if the
anode is checked or replaced.
7.4 EMPTYING THE BOILER
If not in use, especially in case of low temperatures, it is advis-
able to drain the water inside the boiler. For the equipment in
question, just open the drain cock as per the example hydraulic
connections chap. “6.7 HYDRAULIC CONNECTIONS” on page
NB!: In case of low temperatures, remember
to empty the system to avoid freezing.
7.5 REPLACEMENT OF THE POWER CORD
ATTENTION
DO NOT TAMPER WITH THE
POWER CORD.
If the power supply cable is dam-
aged, it must be replaced by the
manufacturer or the technical as-
sistance service or in any case
by a person with similar qualifi-
cations, in order to prevent any
risk.
The cable must be replaced in compliance with the laws in force
in the country where the product is used.
Replace the damaged power cord with a new one with the same
or equivalent characteristics to the original cord.
8. REQUIREMENTS FOR THE
OPERATION, SERVICE AND
INSTALLATION OF APPLIANCES THAT
USE FLAMMABLE REFRIGERANT
GASES ACCORDING TO ANNEX DD OF
EN 60335-2-40
8.1 GENERAL WARNINGS
OBLIGATION
Any maintenance operation must
be performed by qualified per-
sonnel in accordance with the in-
structions in this manual.
OBLIGATION
Do not use any means to accel-
erate the defrosting or cleaning
process, other than those recom-
mended by the manufacturer.
OBLIGATION
The unit must be placed in a
room that does not have continu-
ous ignition sources (e.g. naked
flames, a gas appliance or elec-
tric heater in operation).
OBLIGATION
Do not pierce or burn.
OBLIGATION
Remember that refrigerant fluids
may be odorless.
