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6.1 Mechanisms inspection and repair (Important - safety note)
Please read Section 1.12 regarding the safe lifting of this product before actioning
any installation or maintenance procedure.
Before any installation or maintenance procedure, always ensure that all steam or
condensate lines are isolated.
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.
When dismantling this product, care should be taken to prevent injury from the snap
action mechanism. Always handle with care.
The APT14, APT14HC and APT14SHC should be inspected periodically, intervals
dependant on application. Contact Spirax Sarco for details.
6.2 Removal and fitting of cover assembly
Please ensure the safety recommendations are observed before commencing with any
maintenance of this product.
6.3 To remove the cover assembly
1. Disconnect all connections to the cover. Remove the cover bolts using the correct
size socket, then carefully slide the cover assembly away from the body (a minimum
withdrawal distance of 250 mm for the APT14 or 275 mm for the APT14HC and
APT14SHC will be needed). Lift the cover assembly to a bench or other convenient
working surface and clamp securely, avoiding contact with the gasket face.
2. Visually inspect the mechanism for obvious damage. Check that it is free of dirt and
scale and operates freely when the floats are moved up and down.
3. Inspect the spring assembly for damage. Make sure the valves slide freely and the
spring loaded exhaust valve moves on its guide.
4. Inspect the floats to ensure they are undamaged. Check they pivot smoothly on the
pump and trap levers and they are not waterlogged.
5. Ensure the inlet swing check valve is free to move and the sealing faces of both the
seat and the flap are clean and undamaged. (If the seat is badly scored or damaged a
new cover assembly may be required).
6. Check the two stage trap module to ensure both the 1st and 2nd stage valves are free
from dirt and debris. Ensure they slide open and close smoothly.
7. It is not possible to visually check the outlet check valve without removing the trap
module (refer to Section 8 of this manual for correct removal and fitting of this part -
APT14 only).
8. If any of the parts appear damaged or fail to work correctly, then refer to Sections 8
and 9 of this manual for correct removal and fitting instructions.
6. Maintenance
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