PREVENTATIVE MAINTENANCE
Spiders, mud wasps, and other insects can build nests in the burner tube. This will cause poor combustion, delayed ignition or ignition out- side combustion tube. Listen for a change in burner sounds or in flame appearance from a hard blue flame to a soft lazy flame or one that is very yellow. These are indications of an obstruction in burner tube (FIG
a.Remove air shutter screw (FIG
b.Run a flexible wire brush down burner tube (FIG
c.Vacuum burner where it enters combustion tube.
d.Return air shutter to original position and replace screw.
e.The orifice, burner tube and shutter must be aligned so that the shutter is not binding on the air tube.
HOW TO CLEAN PILOT MODELS - FIG 6
1.Check main burner orifice and pilot assembly for contamination (dirt, spider webs, etc.).
2.Clean main burner tube with small brush.
3.Main burner adjustment - open air shutter 1/4 way.
4.Low pilot flame. Check for contamination - if clean have the pilot orifice replaced.
HOW TO CLEAN ELECTRONIC IGNITION MODEL
1.Check main burner orifice.
2.Clean and adjust main burner.
3.Main burner and valve manifold must align with each other
4.Check electrode for cracked porcelain (FIG
5.Check electrode for proper gap - 1/8” between electrode and ground.
6.If module board functions intermittently, remove board and clean terminal block with pencil eraser (FIG
WATER HEATER TANK CARE
WARNING
SCALDING INJURY
•Turn off water heater and allow time for water to cool before remov- ing drain plug to flush tank.
A Pressure Temperature Relief Valve, dripping while the water heater is running, DOES NOT mean it is defective. During normal expansion of water, as it is heated in the closed water system of a recreation vehi- cle, the Pressure Temperature Relief Valve will sometimes drip. The Atwood water heater tank is designed with an internal air gap at the top of the tank to reduce the possibility of dripping. In time, the expanding water will absorb this air and it must be restored. Due to variations in water quality, the Pressure Temperture Relief Valve may have a shorter life and may need replacement within the water heater warranty period. If corrosion is detected, it will not be covered under warranty.
WARNING
SCALDING INJURY
•Turn off water heater before opening
TO REPLACE THE AIR GAP FOLLOW THESE STEPS:
1.Turn off main water supply (the pump or water hook up source).
2.Let water cool or let run until cool.
3.Open the hot water faucet closest to the water heater.
4.Pull handle of pressure temperature relief valve straight out and allow water to flow until it stops.
5.Allow pressure temperature relief valve to snap shut; close faucet; turn on water supply.
6.Turn on water heater and test.
•At least once a year manually operate
valve (FIG 10).
When
•Install a pressure relief valve in cold water inlet line to water heater and attach a drain line from valve to outside of coach. Set to relieve at
•Install a
WINTERIZING (FLUSHING) INSTRUCTIONS
To insure the best performance of your water heater and add to the life of the tank, periodically drain and flush the water heater tank. Before long term storage or freezing weather drain and flush the tank.
1.Turn off main water supply (the pump or water supply (the pump or water hook up source).
2.Drain Water Heater Tank by removing the drain plug. If the water flows sporadically or trickles instead of a steady stream of water, we recommend the following action; first open the Pressure Temperature Relief Valve to allow air into the tank and secondly, take a small gauge wire or coat hanger and poke through the drain opening to eliminate any obstructions.
3.After draining the tank, because of the placement of the Drain Plug, approximately two quarts of water will remain in the tank. This water contains most of the harmful corrosive particles. To remove these harmful corrosive particles flush the tank with either air or water. Whether using air or water pressure, it may be applied through the inlet or outlet on the rear of the tank or the Pressure Temperature Relief Valve. (If using the Pressure Temperature Relief Valve the Support Flange must be removed). The pressure will force out the remaining water and the corrosive particles.
If you use water pressure, pump fresh water into the tank with the assistance of the
4.Replace the Drain Plug and close the Pressure Temperature Relieve Valve. the approximately two quarts of water remining in the tank after draining will not cause damage to the tank should freezing occur.
PRESSURE-TEMPERATURE RELIEF VALVE
WARNING
EXPLOSION
•Do not place a valve, plug or reducing coupling on outlet part of
5 |
FLUSHING TO REMOVE UNPLEASANT ODOR
A rotten egg odor (hydrogen sulfide) may be produced when the electro galvanic action of the cladding material releases hydrogen from the water. if sulfur is present in the water supply the two will combine and produce an unpleasant smell.
1.Turn off main water supply. Drain the water heater tank and reinstall drain plug. Remove the
2.Cycle water heater with the above solution, letting it run under nor- mal operation
3.Remove the drain plug and thoroughly drain all water from the tank. Flush the water heater to remove any sediment. You may flush the tank with air pressure or fresh water. pressure may be applied through either the inlet or outlet valves on the rear of the tank or through the
TO FLUSH TANK WITH AIR PRESSURE:
Insert your air pressure through the
To flush tank with water pressure:
Fresh water should be pumped into the tank with either the onboard pump or external water pressure. Continue this flushing process for approximately 5 minutes, allowing the fresh water to agitate the stagnant water on the bottom of the tank and forcing the deposits through the drain opening.
4.Replace drain plug and
5.Refill tank with fresh water that contains no sulphur.
The Atwood water heater is designed for use in a recreation vehicle. If you use your vehicle frequently or for long periods of time, flushing the water heater several times a year will prolong the life of the storage tank.