Viessmann EM-EA1 Installation And Service Instructions Manual page 18

Installation sequence
Power supply
(cont.)
E
L1
N
C
D
B
Fig. 17
Power supply for extension (electronics module)
A
Power supply for heat generator
B
Power supply 1/N/PE, 230 V/50 Hz
C
Fuse (max. 16 A)
D
E Mains isolator, 2-pole, on site
Junction box (on site)
F
18
F
D
40
A
Connect the power supply in accordance with the dia-
gram.
If the power supply to the appliance is connected with
a flexible cable, ensure that the live conductors are
pulled taut before the earth conductor in the event of
strain relief failure. The length of the earth conductor
wire will depend on the design.
Danger
Incorrect core assignment can result in serious
injury and damage to the appliance.
Never interchange cores "L" and "N".
!
Please note
Incorrect phase sequence can cause damage to
the appliance.
Ensure phase equality with the heat generator
power supply.
Colour coding to IEC 60757
BN Brown
BU Blue
GNYE Green/yellow