COSMOGAS MYDENS, Installation, Use And Maintenance Manual

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19 MYDENS
COSMOGAS
5.14 - Electric connections: generalities
ATTENTION !!! The appliance is only electrically
safe when it has been correctly connected to an
efficient earth circuit, performed as envisioned by the
current Safety Standards.
This fundamental safety requirement must be met. If in
doubt, request a thorough control of the electric plant by a
professionally qualified technician.

Have a professionally qualified technician check that the
electric plant is suitable for the electric power required by
the appliance, indicated on the plate.

The appliance must be connected to the mains electricity
using a cable coupler. The use of adapters, multiple
sockets, extensions, etc. is not allowed.

The appliance must be connected to the mains electricity
using a three-polar electric cable, with double isolation,
minimum section of 1.5 mm² and resistant to a minimum
temperature of 70°C characteristic T).

For connection to mains electricity, a bi-polar switch
must be envisioned in the vicinity of the appliance
with a contacts opening distance of at least 3 mm, as
envisioned by the current regulations on the subject.

Respect the polarity between the neutral phase during
connection of the appliance.

Make sure that the water plant and heating pipes are not
used as earth points for the electric or telephone plant.
This piping is not suitable for this purpose, moreover,
serious corrosion damage would occur in a very short
time, on the appliance, piping and radiators.
ATTENTION !!! the boiler is not protected
against the effects caused by lightening.
D
C
C
C
B
A
020002.01.009
5 - INSTALLATION
Figure 5.10 - Electric connections
Key for figure 5.10
A = Commands board box;
B = Electric connections board lid;
C = Connections lid closing flaps;
D = electric connections board
Key for electric contacts
PM = External modulating pump control (if present)
CH = Supply sensor (for boilers in cascade mode)
BUS = Remote control
TA = Room thermostat/chronothermostat
0-10 = 0-10 volt signal input
SE = External sensor (if present)
SB = Indirect water heater sensor (if present)
MF = Multi-function output
PE = External pump (if present)
DNC = External diverter valve (if present) (D = Domestic hot
water line; N = Neutral; C = Heating line)
L1 = boiler power supply line
N = Boiler power supply neutral
EARTH SYMBOL = Earth contacts
020002.01.010