Accorroni MEC25-85 Technical Information page 19

1.11 WIRING DIAGRAM MEC 35-35C-57-57C-85-85C
[b]
1
[n]
Ef2
2
[m]
3
M1
L N 1a N
J1
J2
L N SB RS
NC
P
C
L
J 22
N
J 21
SB
J 20
RS
J 19
J 18
Op
Ac = Control equipment
Br1 = Burner
Br2 = Second burner (MEC 85)
C1 = Fan motor condenser
C2 = Flue exhaust motor condenser (MEC 85)
Cs = Printed circuit board
Ea1 = Ignition electrode
Ea2 = Br2 ignition electrode (MEC 85)
Ef1 = Flue exhaust motor (MEC 25-57)
Ef2 = Flue exhaust motor (MEC 85)
Er = Flame detection electrode
Ev = Gas solenoid valve
Fr = Radio interference filter
M1 = Ef2 connection terminal boards (MEC 85)
Mvc1 = Centrifugal fan motor (MEC C 25-85)
Mvc2 = Centrifugal fan motor (MEC C 50-85)
Mvc3 = Centrifugal fan motor (MEC C 85)
Mve1 = Axial fan motor (MEC 25-85)
Mve2 = Axial fan motor (MEC 50-85)
Mve3 = Axial fan motor (MEC 85)
Cable colors
C2
1a N
N 1a N 1a
J3 J4
Tr
Ts1
NO
Ef1
Ts2
Ev
Tv
K3 K1 K2
R3 R1
R2
1
2
Sb Rs
3
[b] = blue
[bi] = white
[g] = yellow
[g/v] = yellow/green
[gr] = grey
[m] = brown
[n] = black
Er
Ea2 Ea1
Br2 Br1
[n] common
J 25
J 23
C1
[m] condenser
J 24 J 26
Mve1
[b] max.
J 27
J 28
[b] common
J 29
[m] condenser
J 30
Mve2
[g] max.
J 31
J 32
[b] common
J 33
[m] condenser
J 34
Mve3
[g] max.
J 35
J 36
Fr
3(U)
N
L
1(U)
Cs
Op = Jumper for auxiliaries
P = Differential pressure switch
R1 = Fan relay (MEC C)
R2-R3 = Fan relay (MEC C / MEC 85)
Rs = Reset button
Sb = Lockout signal
Tr = Br2 ignition transformer (MEC 85)
Ts1 = Safety thermostat
Ts2 = Second safety thermostat (MEC 85)
Tv = Fan thermostat
= Fuse
- - - - - = Connection to be made
= Series connection
= Varying connection (model depending)
Warning:
- Install an omnipolar switch with a contact opening of at
least 3 mm.
- The 230 V ~ 50 Hz single-phase power supply must be
connected according to the phase-neutral polarity.
page 17
L N
[g/ v]
[b]
[m] [ n]
J27 J26 J25
ELECTRICAL SCHEMA FOR AXIAL FAN
Ac
[b] common
J25
[m] condenser
J26
[n 2] max.
J27
[n 1] min.
J28
[b] common
J29
[m] condenser
J30
[n 2] max.
J31
[n 1] min.
J32
[b] common
J33
[m] condenser
J34
[n 2] max.
J35
[n 1] min.
J36
230 V ~
(4)
N
50 Hz
L
(2)
Mvc1
Mvc2
Mvc3
Fig. 10