Spirax Sarco APT10-2, Installation And Maintenance Instructions Manual, Page: 30 / 32

IM-P612-18 ST Issue 3
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9. Fault finding guide
Caution
Installation and trouble shooting should only be performed by qualified personnel.
Before any maintenance is attempted, ensure any residual internal pressure in the
product or connecting lines is carefully relieved. Also ensure any hot parts have cooled
to prevent risk of injury from burns. Always wear appropriate safety clothing before
carrying out any installation or maintenance work.
Always use suitable lifting gear and ensure the product is safely secured. When dismantling
this product, care should be taken to prevent injury from the snap action mechanism.
Always handle with care.
The APT10-2 has been thoroughly tested before it leaves the factory. This includes a comprehensive
functional test. If the unit has failed to operate it is likely that an installation problem could exist.
Please check the following before commencing with the trouble-shooting chart.
9.1 Trouble areas to check first:-
• Are all isolating valves open?
• Is the condensate inlet strainer ( as recommended in Fig. 5 page 9) clean
and free from debris ?
• Does the installation head available exceed 0.2 m from the base of the
pump ?
• Is the available motive pressure higher than the total back pressure
(not exceeding 2.0 bar g (29 psi g) ?
• Is the exhaust balance line (E) connected to the outlet of the equipment
being drained and is it free from obstruction (refer to installation diagram
Fig. 5, page 9) ?
• Is the direction of flow though the unit correct, indicated by the flow arrow ?