ARI Armaturen Liquid PN25 EN - Manual (Page 6)

Page 6 Rev. 0040807002 0405
Operating and installation instructions
Liquid return temperature limiter
5.2 Installation instructions for welding
(refer to Fig. 2 page 4)
Please note that only qualified persons using appropriate equipment and working in
accordance with technical rules are allowed to install fittings by welding.
The responsibility for this lies with the system owner.
Please refer to the catalogue sheet for information on type and instructions relating to
welding socket weld ends/butt weld ends.
When welding products to the pipeline system these should be adequately cooled to
preclude any adverse effect on the complete controller assembly (Pos. 24). The heat-
affected zone should in principle be restricted to the immediate weld seam area!
Note pre- and post-welding heat treatment in accordance with Material Fact Sheet
DIN EN 10222.
If there are plans to etch the facility before putting it into operation, the complete controller
units (Pos. 24) should be removed, replaced by etch inserts, and refitted after etching (see
7.1). In such an event please contact the manufacturer.
5.3 Controller adjustment
(refer to Fig. 3 page 6)
- The controller (Pos. 24) has a stroke limiter at approx. 130°C.
- Possible closing temperature range: 60°C to 130°C.
- The controller (Pos. 24) is factory set as ordered by the customer.
The setting can subsequently be readjusted as follows without disassembling the screw
cap (Pos. 6):
- Open the plug (Pos. 43) when unpressurised.
- Using a screwdriver, adjust the closing temperature direct from outside (half a clockwise
turn of the spindle (Pos. 24.3) gives a temperature increase of approx. 10 K).
- Screw plug (Pos. 43) in and tighten (see 7.3).
ATTENTION !
- refer to item 10.0 and 11.0 prior to dismantling and repair work!
Fig. 3: Controller, cpl.