SMB Air Conditioner
12 VDC Owner’s Manual 9/09
Page 7 of 13
Chapter 5 - Winterizing the System
There are two scenarios for winterizing the system – the boat remains in the water or the boat is
out of the water, in dry dock storage. Please follow the procedures described below for your situation.
Boat remains in the water
In water storage requires the use of a potable anti-freeze solution throughout the system’s water supply
and discharge lines. Be sure to follow all state, local and federal ordinances before discharging an anti-
freeze solution overboard.
1. Close ball valve.
2. Disconnect water line at ball valve.
3. Insert line into a bucket of potable anti-freeze.
4. Run air conditioner until a solid stream of anti-freeze is being discharged overboard.
5. Reconnect water line at ball valve.
Boat is out of water in dry dock
With the boat out of the water:
1. Open the seacock to permit all the water to drain out of system via the thru-hull fitting.
2. Remove and empty the seawater strainer basin.
3. Loosen the screws on the pump head to allow the water to drain from the pump and from the water
line between the pump and strainer.
4. Close the seacock.
When the boat is put back into the water in the spring:
1. Gradually open the seacock to allow water to fill the system to the level of the pump.
2. Tighten the pump face to achieve a seal.
3. Open the seacock valve completely.
