Suburban SW6DERA User Manual

THERMOSTAT AND MANUAL RESET
For all Models
The model water heaters listed above are equipped with a high temperature limit
as a cut-o󰀨 device. Temperature above 82°C will cause manual reset button to trip
shutting down main burner.
To activate burner, the water temperature must be below 37°C. Push reset button
to re-activate burner.
THERMOSTAT AND MANUAL RESET
For Models SW4DERA, SW4DEFA, SW6DERA, and SW6DEFA
DANGER! The operation of a thermal cut-out indicates a possibly
dangerous situation. Do not reset the thermal cut-out until the water
heater has been serviced by a qualied person.
The model water heaters listed above are equipped with a high temperature limit
as a cut-o󰀨 device. Temperature above 82°C will cause manual reset button to trip
shutting down the electric element.
To activate element, the water temperature must be below 37°C. Push reset but-
ton to re-activate the electric element.
ANODE PROTECTION
The tank in this water heater is protected by a magnesium or aluminum anode to
prolong the life of the tank. Removal of the anode will decrease tank life and will
void the warranty on the inner tank. Anode must be checked every 6 (six) months,
and replaced if below 50% of original diameter, failure to do so will void your war-
ranty. Use only genuine Suburban anode rods. Use of other anodes may void
the warranty. Anode performance depends on water quality, therefore are NOT
covered by warranty.
To prevent a water leak when replacing the anode rod, a pipe thread sealant ap-
proved for potable water (such as Teon Tape) must be applied to the threads of
the anode rod. Proper application of a thread sealant will not interfere with the
anode’s tank protection.
Anode Dimensions: Length - 215mm, Diameter - 17mm.
NOTE: Tank is drained by removing anode rod (See “Drain and Storage” instruc-
tions).
To extend anode life, drain water from tank whenever RV is not being used. Avoid
any extended time of non-use with water in tank.
Also, refer to the section on winterizing.
WARNING! Do not replace the anode rod with any non-Suburban accessory part, such as
an “add-on” electric heating element. Items such as these are not approved to be installed in
Suburban products. They could create an unsafe condition and will also void all warranties.
PRESSURE RELIEF VALVE
The temperature and pressure relief valve is designed to open if the tempera-
ture of the water within the heater reaches 98.9 degrees Celsius, or if the water
pressure in the heater reaches 700 kPa. Recreational vehicle water systems are
closed systems and during the water heating cycle the pressure build-up in the
water system will reach 700 kPa. When this pressure is reached, the pressure
relief valve will open and water will drip from the valve. This dripping will continue
until the pressure is reduced to below 700 kPa. Once the pressure has dropped
below 700 kPa, the valve will close. This condition is normal and does not indicate
a defective relief valve.
The water may drip from the discharge pipe of the pressure relief device, this pipe
must be left open to the atmosphere.
WARNING! Do not plug, cap or reduce the outlet pressure and temperature valve.
The pressure-relief device is to be operated regularly to remove lime deposits and
to verify that it is not blocked.
DANGER! Failure to operate the relief valve easing gear at least once
every six months may result in the water heater exploding. Continuous
leakage of water from the valve may indicate a problem with the water
heater.
WATER WEEPING OR DRIPPING
FROM PRESSURE RELIEF VALVE
You may experience water weeping or dripping from your water heater’s Pressure
and Temperature (P & T) Relief Valve when your water heater is operating. Water
weeping or dripping from the P & T Valve does not always mean the P & T Valve
is defective. As water is heated, it expands. The water system in a recreational
vehicle is a closed system and does not allow for the expansion of heated water.
When the pressure of the water system exceeds the relieving point of the P & T
Valve, the valve will relieve the excess pressure. Suburban recommends that a
check valve not be installed directly at the inlet to the water heater tank. This will
increase weeping of the pressure relief valve.
One way to reduce the frequency of this occurrence is to maintain an air pocket
at the top of the water heater tank. This air pocket will form in the tank by design.
However, it will be reduced over time by the everyday use of your water heater.
To replenish this air pocket:
1. Turn o󰀨 water heater.
2. Turn o󰀨 cold water supply line.
3. Open a tap in the RV.
4. Pull out on the handle of the Pressure Relief (P & T) Valve and allow water to
ow from the valve until it stops.
5. Release handle on P & T Valve - it should snap closed.
6. Close tap and turn on cold water supply; as the tank lls, the air pocket will develop.
Repeat this procedure as often as needed to reduce the frequency of the weeping
of the P & T Valve. If the weeping persists after following this procedure, you may
elect to install an expansion or accumulator tank in the cold water line to relieve
the pressure caused by thermal expansion.
Suitable ttings are required to be installed in the pressure relief valve for piping
the water away. The hole through which the piping passes must be sealed water
tight.
The discharge pipe must not be reduced in size along its length. The length and
number of bends should be kept to a minimum and should be supported in a man-
ner to reduce the risk of crushing or blockage.
A discharge pipe connected to the pressure relief device is to be installed in con-
tinuously downward direction and in a frost free environment.
Please contact your local dealer for assistance.
DRAINING AND STORAGE INSTRUCTIONS
If unit is to be stored during the winter months, the heater must be drained to
prevent damage in the case of freezing temperatures.
1. Turn o󰀨 gas supply to the water heater.
2. Turn o󰀨 pressure pump on the water system.
3. Open both hot and cold water taps.
4. Open the drain on the water heater. (Remove anode rod)
5. Follow RV manufacturer’s instructions for draining of the entire water system.
NOTE: Be certain to rell water heater with water before re-lighting the appliance.
ODOR FROM HOT WATER SYSTEM
Odor from the hot water system is not a service problem and many water supplies
contain su󰀩cient amounts of sulphur to produce an odor. The odor is similar to rot-
ten eggs and is often referred to as “sulphur water”. It is not harmful - only unpleas-
ant to smell. Sulphur water can be caused by a chemical action or by bacteria. The
solution to eliminate is chlorination of the water system. Add about 17.75 cL of chlo-
rinated common household liquid bleach to each 38 Liters in the water tank. Then
run the chlorinated water throughout the system, opening each faucet one at a time
until you smell the chlorine. Let the RV sit for a few days and the chlorine should
take care of the problem. Then you will need to take care of the chlorine. Remove
the chlorine by ushing the system with fresh water. This may take several attempts.
You may consider adding a ltering system that removes chlorine and prevents
sulphur water. If the sulphur or rotten egg smell continues, ush the system once
again as described above and replace anode rod as necessary.
REMOVING WATER HEATER
1. Shut o󰀨 gas supply and disconnect gas supply line from water heater.
2. Shut o󰀨 water supply. Drain water from tank following instructions under
“Draining and Storage”.
3. Disconnect hot and cold water lines from water heater.
4. Remove screws or nails securing control housing to framed opening.
5. Slide heater out. To reinstall, follow instructions in manual under “Installation Instructions”.
WINTERIZING
If your water heater plumbing system is equipped with a bypass kit, use it to
close o󰀨 the water heater, drain the water heater completely and leave the water
heater closed o󰀨 (out of the system) in the bypass position particularly if you are
introducing antifreeze into the plumbing system. Antifreeze can be very corrosive
to the anode rod creating premature failure and heavy sediment in the tank. If the
plumbing system is not equipped with a bypass kit, and you intend to winterize by
adding antifreeze to the system, remove the anode rod (storing it for the winter)
and replace it with a 19mm drain plug.
HIGH ALTITUDE DERATION
Suburban’s water heaters are certied by nationally recognized testing labora-
tories for operation without modications at altitudes up to 4,500 feet. Operation
above this elevation may require derating by 4 percent for every 1,000 feet above
sea level. As an example, at 8,000 feet, the water heater should be derated ap-
proximately 32 percent.
If the unit is not properly derated, lack of su󰀩cient oxygen for combustion may
produce improper burner operation. Pilot outage caused by burner lift-o󰀨 or soot-
ing from a yellow burner may occur indicating the possibility of carbon monoxide.
You may also notice a lack of e󰀩ciency in heating the water because of incom-
plete combustion of the burner at these higher altitudes.
Consult with the local gas company, your dealer, an RV service agency or Sub-
urban Manufacturing Company for proper derating of the unit. Change-out of the
orice (derating) should be done by the dealer or an authorised service agency.
NOTE: It is important that once the unit has returned to lower elevation (below
4,500 feet) this high altitude deration and pilot adjustments (if equipped) be re-
versed for proper operation of the unit.
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Suburban SW6DERA Specifications

General

Brand	Suburban
Model	SW6DERA
Category	Water Heater
Language	English