Temperature Adjustment
Outlet water temperature can be adjusted by turning
the “Summer / Winter” up 1/4 turn. Full vertical is the
warmest position and full horizontal is the coolest
position.
“Summer / Winter” valve in “Summer” position
A Note About “Navy Showers”
It is recommended to take a shower just like you would at home. That is, leave the water running
through the entire shower. The hot water system is designed to deliver a continuous, comfortable
flow of hot water and that’s the way it works best.
Shutting off the shower with the shower head button wastes water. Each time this is done, the
shower head “trickles”, filling the hot water line with cold water. This cold water has to be purged
from the line each time the shower head is turned back on. Tests have shown that this will not
save water and sometimes uses more water than leaving the shower run continuously.
Winter Operation and Winterizing Water
If your heater is equipped with the optional Cold Weather Protection Kit, (CWP)it will prevent
freezing under most conditions. In order for it to function, 12 VOLT AND GAS SUPPLY MUST
REMAIN TURNED ON. This allows the burner to fire and electric elements to protect the system.
Any freezing of the water heater or other plumbing components can cause severe damage that is
not covered by warranty.
If your heater is not equipped with CWP, drain heater during freezing conditions as
follows:
1. Turn off water pump and the power and gas to the heater. Open the pressure relief valve by
lifting the handle to a 90° position from the normal position.
2. Summer / Winter valve should be turned to “SUMMER” position. See illustration.
3. Open at least one hot and cold water tap in the boat. This should drain the system.
Winterizing Procedure:
Before storing the system for the winter, the plumbing system must be winterized. This can be
done by either of the following methods:
1. Turn the Temperature adjustment knob to the full Summer (3 o’clock) and open the pressure
relief valve by lifting the handle to a 90° position from the normal position. All water should be
drained from the system. To do this, open one tap at a time using compressed air to purge the
system of all water.
2. Recommendations of your boat manufacturer should be followed. The water system can be
filled with RV, non-toxic anti-freeze. When you see the anti-freeze coming from the hot water tap,
the heater is protected.
