De Winterize on the 177

Often, under the mattress, there are several screws holding down the plywood access panel for the water heater.  Before you begin, raise the blinds in the back so that they're out of the way and remove all sheets/foam pads from the mattress.  Lift up the edge of mattress and sit down on the plywood underneath, holding the mattress up with your shoulders and back of your head while you work.  Unscrew the access panel over the water heater, move the plywood out of the way, and you'll see the three bypass valves.  For normal operation, turn the valves on the pipes leading into/out-of the water heater parallel to the pipes; the third (middle) valve, which is on a short piece of pipe running between the other two valves must be turned perpendicular to the pipe.