PrecisionTemp RV550/NSP-EC Quick Start Manual

RV550/NSP-EC OPERATING INSTRUCTIONS

The RV-550EC is designed to give a continuous flow of hot water as long as required and
maintain temperature within the capacity of the heater (85°F temperature rise at one GPM).
The temperature on your water heater has been factory set to approximately 120°F. It is not
recommended that you change this setting. Doing so could result in dangerously hot
temperatures that could result in severe injury. If it is necessary to change the setting refer to
the Service Manual or call PrecisionTemp.
The heater is dormant until a hot water tap is opened. The heater will not fire at very low
flows; i.e., under 0.4 GPM. During normal operation the RV550/NSP-EC will have a steady
flashing green LED light on the green control board. A red flashing LED indicates a self
diagnostic trouble code; refer to the Service Manual or call PrecisionTemp for assistance.
When adjusting water temperature it is best to start with hot only and slowly add cold into the
mix until the desired temperature is reached.
NOTE: When using an "on/off" button on a shower head or an outside wash down box, always
turn off the hot and cold water valves when finished. Not doing so will result in cold water
bleeding into the hot water system. This will either cause the water heater not to ignite or
result in alternating warm and cold water.
Dry Camping
RV showerheads are designed to drip when turned off and will allow the hot water line to be
filled with cold water. When showering it is recommended that you leave the water running
as you would at home. You will not run out of hot water and you will not waste additional
water waiting for the cold water to purge from the water line every time the water is turned
back on.
Winter Operation
When operating the RV550/NSP-EC in cold climate conditions the flow of water may have to
be slightly restricted or slowed at the faucet to maintain the set temperature of 120 degrees.
NOTE: Your RV550EC is equipped with the Cold Weather Protection Package. 12vdc power
and propane must be left on to protect the RV550/NSP-EC from freezing in cold climate
conditions.
Winter Driving Instructions:
Under no circumstances should you travel in freezing
conditions without first draining water from the unit. Follow the winter driving draining
instructions prior to driving in freezing temperatures. Freezing is not covered under the
product warranty
.