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Spirax Sarco SA121 - Display Adjustment

Spirax Sarco SA121
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IM-P382-01 CH Issue 4
8
5. Display adjustment
The display of the self-acting temperature control may be adjusted to suit your specific
requirements.
The adjustments include:-
Selection of °C or °F - Section 5.1.
Rotation of the temperature scale - Section 5.2.
Rotation of the dial head - Section 5.3
5.1 Selection of °C or °F
For the following instructions you should make reference to Figure 2 except where stated:-
1. Remove the tamper-proof plug (6) and use a suitable screwdriver to set the indicator (3)
to the midway mark (1).
2. Remove the transparent cover (2).
3. Remove the temperature indicator (3).
4. Remove the temperature indicator scale (4) and select °C or °F (Double sided) as
required (Figure 3) and replace.
5. Replace the indicator to the midway position (1).
6. Replace the transparent cover (2).
This self-acting temperature control is now ready for commissioning as detailed in Section 6.
5.2 Rotating the temperature scale
In some instances it may be necessary to rotate the scale to make the set temperature more
easily read. In such cases the following procedure should be adopted making reference to
Figure 2 and Figure 4 except where stated:-
1. Remove the tamper-proof plug (6) and use a suitable screwdriver to set the indicator (3)
to the midway point (1).
2. Remove the transparent cover (2).
3. Remove the indicator (3).
4. Remove the scale (4) from the indicator and relocate to the desired position i.e. Figure 4.
5. Replace the indicator (3) to the midway point of the scale (1).
6. Replace the transparent cover (2).
This self-acting temperature control is now ready for commissioning as detailed in Section 6.
5.3 Rotating the dial head
The dial head itself may be rotated through 180° if necessary. In such cases the following
procedure should be adopted making reference to Figure 2 and Figure 5 except where
stated:-
1. Remove the tamper-proof plug (6) and use a suitable screwdriver to set the indicator (3)
to the midway point (1).
2. Remove the transparent cover (2).
3. Remove the indicator (3).
4. Remove the dial head retaining screws (5).
5. Rotate the indicator through 180° (Figure 5).
6. Replace the dial head retaining screws (5).
7. Replace the indicator to the midway point and replace the transparent cover and
tamper-proof plug.