Nortec SE Series - Manual (Page 69)

Maintenance and Servicing | 66
Cleaning the Tank
The tank, heat exchanger, and float chamber should be cleaned at least once per season to
remove scale and mineral deposits which can reduce unit efficiency. In areas with high mineral
content in the water, cleaning should be more frequent.
1 Follow Maintenance Shutdown and Extended Shutdown procedure on page 69. Give the
unit some time to cool down to avoid injury when servicing.
2 Remove the cabinetry covers on the front (all models) and top (SE 525 – 1050 models) by
removing the Phillips type screws and lifting the covers.
3 Remove the tank maintenance doors on the front (all models) and top (SE 525 – 1050
models) by applying anti seize compound to nuts and using 1/2 in. socket. Remove excess
anti seize compound.
4 Inspect the tank door gaskets. Remove any scale from the gaskets, the tank door gasket
surface, and tank gasket surface.
5 Using a plastic scraper, such as those used for car windshields, remove scale adhered to
tank walls and visible portions of the heat exchanger. Remove this scale from the unit. A
wet vacuum can be used for this purpose.
6 Inspect the heat exchanger. If significant scale build-up has occurred, follow the cleaning
procedure in the next section.
Warning

Disconnect main power at the external disconnect before any servicing.

Tank and piping may be hot, take care when handling.

Avoid using de-scaler chemicals or caustic chemical which can damage the tank or
heat exchanger.
Figure 48: Tank Access For Cleaning
Front Cover
Top Cover
Top Maintenance Door
(SE 525 - 1050 Only)
Front Maintenance Door
Gaskets
Tank Door Locknuts.
Apply anti seize compound
to remove.
Do not crush gasket.
Max 5 ft-lbs torque.