Mounting instruction 08 November 2011
009265 (replaces 0171-944 - same content as original release from 1997)
New PT100 temperature sensor in replacement of the previous PT100 sensor
Fig. 1: PT100 sensor complete with socket, DKA sealing ring and adaptor with threads for G ½”B and G 1/4”B.
Sabroe part no. 3449.542
The PT100 sensor that you have just received completely replaces the previous PT100 sensors. The new type is
equipped with a G1/4B thread for fitting in the compressor block or in the sensor pockets of the piping system.
Older compressors and plants can be executed with a G1/2"B thread and in such cases you must use the enclosed
thread adaptor. This adaptor is executed in such a way that it seals automatically when tightened. Hence, no sealing
ring is needed.
On mounting of the new PT100 sensor always use the enclosed DKA sealing ring as shown in Fig. 5.
As this PT100 sensor is used with a different type of plug it is necessary to fit this plug on the cable instead of the
former one. The procedure is described below.
Mounting
The plug is taken apart by turning union nut pos. A whereby the top pos. B can be removed and the cable fitted as
shown in the following draft, Fig. 2, as well as in the schematic control diagram in Fig. 4 from the current wiring
diagram.
2 31 4
Terminal number in plug
Fig. 2
Johnson Controls Denmark ApS
Christian X's Vej 201 ∙ 8270 Højbjerg ∙ Denmark
Phone +45 87 36 70 00 ∙ Fax +45 87 36 70 05 ∙ www.sabroe.com
CVR No 19 05 61 71
Page 1 of 4
The stated numbers - shown in Fig. 3 - are cast into the end surfaces of the plug in very small figures.
2
1
3
4
Slot
Top view of plug
Fig. 3
On refitting the plug, a tap in the socket in pos. D will fit into the slot shown in Fig. 3 and this way ensure that the
electrical connection is correct.
The complete plug can be dismantled from the PT100 sensor by turning union nut pos. C. This can be done without
depressurizing the refrigeration plant.
Before the union pos. C is tightened, it is possible, by a careful turning of the electric plug/socket, to obtain a correct
orientation of the cable entry.
With the new PT100 sensor it is further possible to remove sensor element pos. D without depressurizing the
refrigeration plant. This is done by an initial dismantling of the plug followed by a removal of the sensor element by
means of a pair of pointed pliers.
When mounting the sensor element, sealing ring pos. E must be fitted.
Johnson Controls Denmark ApS
Christian X's Vej 201 ∙ 8270 Højbjerg ∙ Denmark
Phone +45 87 36 70 00 ∙ Fax +45 87 36 70 05 ∙ www.sabroe.com
CVR No 19 05 61 71
Page 2 of 4
Unisab II - Schematic control diagram
Temperature analogue inputs for CMO/TCMO, HPO, SMC/TSMC, HPC, SAB and VMY
Protection circuit
PT input no. 2 Protection circuit
PT input no. 3 Protection circuit
PT input no. 4
Protection circuit
PT input no. 1
Micro processor
PT 100 sensor
Scale: –50 C to 180 C
°
°
PT 100 sensor
Scale: –50 C to 180 C
PT 100 sensor
Scale: –50 C to 180 C
PT 100 sensor
Scale: –50 C to 180 C °
°
°°
°
°
Brine/water and
intermediate (recip.comp r.)
temperature
– if used remove
resistor
Oil
temperature
Discharge
temperature
Suction
temperature
1
4
2
1
4
3
2
3
1
4
1
2
3
4
2
3
13
14
15
16
17
18
19
20
S
S
21
22
23
24
25
S
26
27
28
S
9.18
11.1
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18
100 ohm
°
°
°
Fig. 4
Johnson Controls Denmark ApS
Christian X's Vej 201 ∙ 8270 Højbjerg ∙ Denmark
Phone +45 87 36 70 00 ∙ Fax +45 87 36 70 05 ∙ www.sabroe.com
CVR No 19 05 61 71
Page 3 of 4
E
L = 80 35
G 1/4 B
35
Sensor element Temperature sensor
B
A
C
mm 8 .aiDmm 8.5 .aiD
DKA sealing ring
•
15
D
1
Fig. 5
Erhardt Nielsen
Manager, Reciprocating Compressors
Technical Support and Development
Direct no.: +45 87 36 77 20
Fax no.: +45 87 36 77 05
E-mail: [email protected]
Johnson Controls Denmark ApS
Christian X's Vej 201 ∙ 8270 Højbjerg ∙ Denmark
Phone +45 87 36 70 00 ∙ Fax +45 87 36 70 05 ∙ www.sabroe.com
CVR No 19 05 61 71
Page 4 of 4
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