Buderus Logamax plus GB142-24, Installation And Servicing Instructions

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26
We reserve the right to make any changes due to technical modifications!
Installation and Servicing Instructions Logamax plus GB142-24/30/45/60 • Version 12/2004
Buderus Hydronic Systems • http://www.buderus.net
Electrical connections 8
Fig. 25 Electric circuit diagram
38
39
62
70
55
61
11
12
13
14
2
4
3
2
1
1
2
3
1
2
3
P
6
7
5
4
1
2
3
1
2
3
5
6
L
N
PE
L
N
5
M
120 VA
C
1
4
5
53
79
23
67
68
69
76
12
13
14
45
17
49
10
11
28
1
81
27
52
25
3
4
7
80
9
44
16
1
2
6 5 1 2 3 4
L
N
120 VA C
4 3 2 1
5 4 3 2 1 17
16 15
14 13 12 11
10
9 8 7 6 5 4 3 2 1
3 2
1
4 3 2 1
58
1
54 51 46 19
77
26 63 64 75 74 36 37 58 57 33 60 35 8 43 34 16 15 8 1 15 16 13 1
Pin 1
28
55
Pin 81
Pin 16
Pin 1
KIM
120 VA C
120 VA C
24 VA C
120 VA C
0 VA C
24 VRAC
24 VRAC
230 V AC
10 VA C
10 VA C
230 V AC
6 5 1 2 3 4
6 7 8 5 1 2 3 4
57
2
PK PS PZ Grid
61 63 24 25 13 14 N L
PE N L PE N L PE N L PE N L
53 79 23
PE
L
N
PE
L
N
F
a
n unit
Gas b
u
rn
er
fitting
T
ransf
o
rm
er
Hot
surf
ace
ignitor
16-pole connector (120 V
A
C)
81-pole connector (A
C 0, 10, 24 and 120
V)
81-pole connector
16-pole connector
Connection bo
x UBA 3.0
Ionization
Ear
th
Pressure
sensor
Return sensor
Safety-temper ature sensor
Supply sensor
Oper
ating s
witch
Ear
th
120 V
A
C
Function module
Mains supply 120
V
A
C 60 Hz
Circulating pump 120
V
A
C
, max.
100
V
A
DHW circulator 120
V
A
C
, max.
100
V
A
Boiler circulator 120
V
A
C
, max.
100
V
A
External connection f or specialist servicing compan y
Exter
nal s
witch contact
P
otential-free e
.g.
for floor heating DHW sensor On/Off temper
ature
control, potential-free Outdoor-temper
ature
sensor Modulating room controller
BC10 connector
Bus Function module
Exter
nal 3-w
a
y
v
alv
e
orange blue green gre y red
white
white green gre y
lilac
120 V
A
C
Function module
3 2 1 2 1 2 1 2 1 2 1 2 1
RC FA WA FW EV DW V
WARNING
Label all wires prior to disconnection when servicing.
Wiring errors can cause improper and dangerous operation.