2002 by ELTRA GmbH Germany – January 2002 – Service Manual OH 900 / ON 900 / ONH 2000
0.1-5
0.1 Overview of the ON/OH-900; ONH-2000
modifications:
Up to S/N 1500xxxxxx
The electronic unit is replaced by the board UNI 1.3 and the electronic rack is removed.
The corresponding wiring diagram is 32007.
The modification took place in the second half of 2004.
12
1
13
9
6
5
4
3
ws
br
15
gr
23
9
17
18
48
45
2
49
12
47
sw
rs
ws
rt
br
50
46
ws
br
9
10
14
gn
ge
gr
10
19
35
20br
19
ws
2
1
6
5
gn
bl
ge
rt
18 33
34 50
17
1
8rs
7
ge
+15V
-15V
GND
GND
24+25
12+13
21
8
1 13
14 25
vi 43
8bl
+24V 22ac
GND 24ac
ge
gn
br
ws
br
gn
gr
ge
100 cm
100 cm
42 cm
Overheat
Water flow
+24V
GND
Water flow
Trigger
Power ON/OFF
Motor
+24V
Power (1V/kW)
Gas pump
Flow rate
Gas flow
GND
+24V
TC cell
Purge valve
Pneumatic
7
15
Pump control
3
2
ws/gn
bl
sw
rs/gr
13x 0.14²x105 cm abgeschirmt
GND
Flow rate
gr
br
br
gr
gn
ge
rt
gn
gn
bl
bl
49 cm
49 cm
10 GND 24acgn/rt
15
31
27
18
11
br/gr
3 ws/br
Motor
Phase
ws/gn
gn/rt
bl
sw
vi
vi
1
21
rt
bl/ws
33
7rt
Pneumatic valve 11380
Purge valve 01160
Pressure switchrs
13
11
28gr
ws/br
ws/br50 cm
50 cm
50 cm
Phase
115cm
115cm
105cm
Pressure switch
10cm
160cm
Motor
20
19
1
37
Furnace current
9x 0.25²
60 cm
10x 0.25²
NR32
15038
65 cm
Water temp.
ON21-32210
81
159
PW13-32066
6x 0.25²
sw
6
30 cm
140 cm
40 cm
40 cm
40 cm
40 cm
30 cm
FC21
15098
50 cm Furnace voltage
2x 0.75²
1 5 c m
2x 0.75²
5 0cm
NK31- 16100
130 cm
Furnace temp.
30
sw
5
rt
gr
abgeschirmt
D50-Buchse-Lötseite D25-Buchse-Lötseite
D15-Buchse-Lötseite
D37-Buchse -Lötseite -
8
2
4
5
1
11 0 cm
N (Hi)
N (Lo)
GND
GND
3
33
zero
TC temp.
6 9
5
1
D9-Buchse Lötseite
Auto zero signal
2
PIN
1 TC Temp.
Low N output signal
High N output signal
4
5
2
2
GND8
GND9
TC CELL
sample drop
24V AC
GND
current sense
85cm Motor
b lue
b ro wn
y el low
g re y
g re en
o ra nge
p ink
r ed
b lac k
v io let t
wh ite
bl
br
ge
gr
gn
or
r s
r t
s w
v i
ws
36
38
40
35
37
39
or
gn/ws
bl
100 cm
100 cm
100 cm
gr/rs
bl/rt
ws/gn
GND
H/N code
Gas saveing
C1
C3
Purge valve
H/N code switch
25500
01160
11430
11435
Gas save valves
50 cm
50 cm
5x 0.14²x25 cm
abgeschirmt
grgr
br
1
O(Lo) auto zero
2
ge
O(Lo) IR-signal
gn
ge
2
2
1
br
5
1
O(Hi) IR-signal
O(Hi) auto zero
gn
6
ws ws
GND
IR temp.
14
9
81
159
IR-Cell
D15-Socket solder side
GND14
PIN
9
IR Temp.
High O output signal
4
High O auto zero signal3
2
Low O output signal2
2
Low O auto zero signal1
2
ws
2
44
3 vi
rt
60 cm
rt
vi
5
11
4
1
20
19
37
15
14
17
34
16
13
Shield
D37-plug solder side
rs
rs
18 33
34 50
17
1
FD50-Socket solder side
11
gr Water flow
6x 0.14²x130 cm
abgeschirmt
34
27
18
14
16
1
5
3
ULN
7x 0.14²x120 cm
42
36
18
39
28
37
26
20
50
41
38
40
geändert am:
D-41469 Neuss
Mainstr. 85 Block 20
Zeichnungs-Nr.:
Datum
gez.:
gepr.:
Sanda
Polemitis
Name
19.07.2004
19.07.2004
Bez.:
32007
a 21.07.2004
ON900/OH900 + ONH 2000
-UNI 1.3+1.4 Version
Signal and control cable
Benennung:
6x 0.14²x65cm
Abschirmung
5x 0,14²x55cm
b 02.12.2004
c 03.12.2004
9
15
17
16
29
13
UNI 1.3+1.4
UNI 1.3+1.4
Pressure switch
d 07.12.2004
NC
2
e 08.12.2004
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