Appendix 4 Heating unit set-up and take-down

Note: Refer to Technical Drawing – Pg 5A.

Set-up
1. Backwash entire seawater system first.
2. Rinse coarse filter, 10 μm and 1 μm filters with fresh water.
3. Turn off drain valve for coarse filter; open air vent slightly.
4. Install filters in cartridges.
5. Divert flow of water after 1 μm filter to drain for 15 minutes, clearing any chlorine residue in filters.
6. Open incoming valve to coarse filter halfway and valve to 10 μm filter halfway. 7. Rinse heating tank with fresh water.
8. After 15 minutes, divert 1 μm filtered seawater to fill tank.
9. Open Valves X and E all the way.
10. Make sure valves D, F and W are closed.
11. Once level of water in tank has reached the alarm switch and pump is turned on recycling the water into the tank, make sure plates of titanium heaters are covered with water.
12. Turn heaters and controllers on. Set temperature as desired.

13. A small red dot on some temperature controllers indicates that heaters are heating. Once set temperature is reached, red dot disappears.
14. Close incoming water valve from 1 μm filter to accelerate heating in the tank. So that water is only being heated and recycled.
15. Once desired temperature is reached, open incoming seawater valve from 1 μm filter halfway. You now have inflow of 1 μm filtered seawater and recycled water going into tank.
16. Open valve D halfway to supply hatchery with heated seawater and close valve E to halfway mark.
17. Depending on the supply and degree of heating required, balance may have to be altered by degree of valve closure.
Take-down
1. Turn off heaters and temperature controllers.
2. In hatchery unit: Open last red valve of heating line; Make sure all other red valves are closed.
3. In heating unit: Close incoming water from filters and Valve D so that water is only recycled within the tank.
4. Pour 100 ml of chlorine into tank and mix by letting water recycle for at least 15 minutes.
5. When hatchery has been cleaned, close valve E and open valve D completely. Chlorinated water will pass through the lines to hatchery.
6. Once water level drops and pump stops, close valve D and open drain valves F and W. Let tank empty completely.
7. Rinse empty tank and heaters with fresh water hose.
8. Remove filters from cartridges and rinse cartridges with fresh water.
9. Place filters in a bucket of fresh water with a capful of chlorine. Let sit for 24 hours. 10. The next day rinse filters with fresh water and let dry.