​Lay-Z-Spa / Coleman AirJet Pump Descaler - Guidance for Operation
Remove Pump from Spa
1. Power off the pump and disconnect from electricity supply
2. Remove the filter housing from inside the spa
3. Using the caps supplied with your spa, cover the (B+C) flow and return outlets inside of the spa
(If these have been misplaced, plastic bags and rubber bands can be used as an alternative)
4. Disconnect the pump from the spa and move to a clear working area
5. Using the screw on cap supplied with your spa, cap off the AirJet (A) inlet on the outside of the spa
(If misplaced, use a clean rag to block up the pipe, cover with a plastic bag and secure with a rubber band)
Inspect and Backwash
6. Inspect the rubber washer within the (B+C) water connection nuts. If they look grey and perished, a replacement set has
been included with the kit. To fit, undo the two screws, swap the washer and reassemble
7. Using a hose, run water through the top (C) water outlet for a couple of minutes, this will help release debris
Connect, Fill and Descale
8. Ensure the pump is outside and on level ground
9. Connect the descaler to the pump
10. Fill with tap water to approximately 3cm from the top
11. Connect the pump to the electricity supply and power on
12. Start the circulation pump
13. Add more tap water to the descaler, fill to approximately 3cm from the top
14. Set the heater to 40C / 104F
15. Once the water temperature has been reached, add a supplied descaling tablet
16. Leave running for an hour
17. Power off the pump
Drain and Flush
18. Lift and tilt the pump forward to drain the descaling solution, ideally into a bucket for disposal down the sink
19. Refill the descaler with tap water to approximately 3cm from the top
20. Power on and start the circulation pump
21. Run the circulation pump for a couple of minutes to flush the system through
22. Power off the pump and disconnect from electricity supply
23. Lift and tilt the pump forward to drain the water, ideally into a bucket for disposal down the sink
24. Disconnect the descaler from the pump
Reconnect the Pump
25. Inspect the pump AirJet (A) stepped gasket, if it looks perished or damaged, fit the supplied replacement
26. Remove the screw cap from the spa AirJet connector
27. Reconnect the pump
28. Remove the caps from the spa water flow and return outlets
29. Refit filter housing and install a clean filter
30. Connect the pump to the electricity