DOMETIC G9EXT, GE9EXT, GEH9EXT, GE16EXT, GEH16EXT Installation Manual
...
LIMITED TWO-YEAR WARRANTY
LIMITED TWO-YEAR WARRANTY AVAILABLE AT
WWW.DOMETIC.COM/WARRANTY.
IF YOU HAVE QUESTIONS OR TO OBTAIN A COPY OF THE
LIMITED WARRANTY FREE OF CHARGE, CONTACT:
DOMETIC CORPORATION
CUSTOMER SUPPORT CENTER
1120 NORTH MAIN STREET
ELKHART, INDIANA, USA 46514
+1-800-544-4881 OPT 3
GARANTIE LIMITÉE DE DEUX ANS
GARANTIE LIMITÉE DE DEUX ANS DISPONIBLE À
WWW.DOMETIC.COM/WARRANTY.
POUR TOUTE QUESTION OU POUR OBTENIR UNE COPIE
GRATUITE DE LA GARANTIE LIMITÉE, CONTACTER :
DOMETIC CORPORATION
CUSTOMER SUPPORT CENTER
1120 NORTH MAIN STREET
ELKHART, INDIANA, USA 46514
+1-800-544-4881 OPT 3
DOMETIC CORPORATION
1120 North Main Street, Elkhart, IN 46514
Please Visit: WWW.DOMETIC.COM
ENGLISH, FRANCAIS (et Canada)
This water heater design has been certified by the Canadian
Standards Association for installation in recreation vehicles. This
water heater is not for use in marine applications.
SERVICE CALLS & QUESTIONS
Location and phone numbers of qualified Service Centers can
be found at our website http:/www.edometic.com or call
866-869-3118 to have a Service Center List mailed.
SAFETY ALERT SYMBOLS
Safety Symbols alerting you to potential personal safety hazards.
Obey all safety messages following these symbols.
WARNING CAUTION
avoid possible avoid
injury or death injury and/or property damage
possible
LITERATURE NUMBER
MPD 93050
L.P. GAS
WATER HEATER
6 & 10 GALLON
XT®Models: G9EXT, GE9EXT, GEH9EXT
G16EXT, GE16EXT, GEH16EXT
PATENT # 7,020,386
•Installation •Operation •Maintenance
Revision B, 10/30/18
Dometic XT Water Heaters
Advanced Water Heater System Featuring Exothermal Technology
Installation and service must be performed by a qualified Service
Technician, Service Center, OEM or Gas Supplier.
DIMENSIONS
ALL MODEL
6 GALLON 6˝5.81˝5.21˝61 GALLON 25 lbs
10 GALLON 01˝8.12˝5.51˝61 GALLON 32 lbs
WIDTH HEIGHT DEPTH
SHIPPING WT.
WARNING
FIRE OR EXPLOSION
• If the information in this manual is not followed
exactly, a fire or explosion may result causing
property damage, personal injury or loss of life.
Do not store or use gasoline or other flammable vapors and
liquids in the vicinity of this or any other appliance.
WHAT TO DO IF YOU SMELL GAS
• Evacuate
• Shut off gas supply at gas container or source.
•
DO NOT touch any electrical switch, or use any phone or
radio in vehicle.
•
DO NOT start vehicle’s engine or electric generator.
• Contact nearest gas supplier or qualified Service Technician
for repairs.
• If you cannot reach a gas supplier or qualified Service
Technician, contact the nearest fire department.
•
DO NOT turn on gas supply until gas leak(s) has been
repaired.
ALL persons from vehicle.
WATER HEATER MODEL IDENTIFICATION ............................................1
DIMENSIONS ..........................................................1
WEIGHT ................................................................1
SAFETY INFORMATION
Water Heater GENERAL INSTALLATION
Wiring
Cutout Chart
Pressure - Temperature Relief Valve
Consumer Safety Warnings ..............................................................2
How to Operate Your Water Heater ..................................................3-4
Maintenance and Care Instructions ....................................................4
Preventative Maintenance ................................................................4
Winterizing (Flushing) Instructions ....................................................5
Pressure-Temperature Relief Valve ....................................................5
Flushing to Remove Unpleasant Odor ..................................................5
FIGURES ................................................................................6-7
PART IDENTIFICATION ....................................................................8
Water Heater WARRANTY ..............................................................16
EXPLANATION OF MODEL NUMBER
G E H I6 - EXT
®
* EXT
indicates Electronic Exothermal (XT) technology.
** Water heater actual capacity is 6 and10 gallon respectively. Effective capacity,
calculated gallons of 130˚F moderated water is 9 gallons and 16 gallons.
®
Electronic XT*
Effective Capacity**
Engine Heat Exchanger
Electric
Gas
16 1
CRITICAL INSTALLATION WARNINGS
• Install in recreation vehicles only. RV’s are recreation vehicles
designed as temporary living quarters for recreation, camping, or
travel use having their own power or towed by another vehicle.
• All combustion air must be supplied from outside the RV, and all
products of combustion must be vented to outside the RV.
DO NOT vent water heater with venting system serving another
•
appliance.
DO NOT vent water heater to an outside enclosed porch area.
•
• Protect building materials from flue gas exhaust.
• Install water heater on an exterior wall, with access door opening to
outdoors.
DO NOT modify water heater in any way.
•
DO NOT alter water heater for a positive grounding system.
•
•
DO NOT HI-POT water heater unless electronic ignition system
(circuit board) has been disconnected.
DO NOT use battery charger to supply power to water heater even
•
when testing.
USA AND CANADA - FOLLOW ALL APPLICABLE STATE AND LOCAL CODES -
IN THE ABSENCE OF LOCAL CODES OR REGULATIONS, REFER TO CURRENT STANDARDS OF:
• Recreation Vehicles ANSI A119.2/NFPA 501C.
• National Fuel Gas Code ANSI Z223.1 and/or CAN/CGA B149 Installation Codes
• Federal Mobile Home Construction & Safety Standard, Title 24 CFR, part
3280, or when this Standard is not applicable, the Standard for Manufactured
Home Installations (Manufactured Home Sites, Communities and Set-Ups),
ANSI A255.1 and/or CAN/CSA-Z240 MH Series, Mobile Homes.
• National Electrical Code ANSI/NFPA No. 70 and/or CSA C22.1
• Park Trailers A119.5
• CSA standard Z240 RV Series, Recreational Vehicle.
• ASSE Standard 1017 (Mixing Value).
• NSF Standard ANSI/NSF 14-2003 (All Hoses and Plastic Fittings).
GENERAL INSTALLATION
This is a common installation for water heaters. There are other
approved methods such as Flush Mount (MPD 93948) installations.
Consult with your Field Audito
Service Department if you have additional questions.
1. Locate water heater on floor of coach before erecting side walls.
The water heater tank must be permanently supported at the same
level as the bottom of sidewall cutout (by the floor or a raised floor)
FIG 2. Provide adequate clearance at rear of unit for service of water
connections.
2. To install water heater on carpeting, you must install appliance on a
metal or wood panel that extends at least three inches beyond the
full width and depth of appliance.
3. If the appliance is installed where connection or tank leakage will
damage adjacent area, install a drain pan (which can be drained to
out side of coach) under water heater.
WIRING
All wiring must comply with applicable electrical codes.
COMBINATION GAS/ELECTRIC MODELS are designed to operate with gas,
electricity, or a combination of both.
• Use electrical metallic tubing, flexible metal conduit, metal clad
cable, or nonmetallic-sheathed cable with grounding conductor. Wire
must have a capacity of 1400 watts or greater. The wiring method
must conform to applicable sections of article 551 of National
Electrical Code ANSI/NFPA 70.
1. Refer to Wiring Diagram (
connections from junction box on back of unit.
a. Connect hot lead to (1) Black.
b. Connect common lead to (2) White.
c. Connect ground wire from electrical service to (3) green ground
lead in junction box 3.
r, Account Manager, or the Dometic
FIG 12). Make 120 VAC electrical
CAUTION
PRODUCT DAMAGE
• When using Romex®with a bare earth ground, take care to position
ground wire so it does not contact the heating element terminals.
• When a cord and plug connection to the power supply are used on
water heater, power cord must be UL listed as suitable for damp
locations, hard or extra hard usage. It must be a flexible cord such
as type S, SO, ST, STO, SJ, SJT, SJTO, HS or HSO cord as described
in National Electrical Code, ANSI/NFPA 70. The length of external
cord to water heater, measured to face of attachment plug, shall be
no less than 2 feet nor more than 6 feet. Supply cord must be a
minimum of 14 AWG and attachment plug must be rated at 15 amps.
CAUTION
ELECTRICAL DAMAGE
• Label all wires before disconnecting when servicing controls.
• Verify proper operation after servicing.
ELECTRONIC IGNITION
NOTE: It is recommended unit be connected directly to a 12V DC
battery or to filtered side of an AC/DC converter. Avoid connections to
unfiltered side of an AC/DC converter whenever possible. Use a
minimum of 18 gauge wire, UL and CSA listed.
1. Refer to Wiring Diagram (
convenient location. Position wall plate with letters up. Before
making connections turn switch OFF.
2. Install wires see
HEAT EXCHANGE MODELS -
1. Push a 5/8˝ diameter coolant system hose (5-A) [with SAE 053 A
Type “E”clamp attached] onto heat exchanger tube (5-B) making a
tight connection.
2. Spread hose clamp and slide toward heat exchange unit past
annular groove (5-C) and release.
3. Continue to HOW TO OPERATE YOUR WATER HEATER and/or Electronic
Ignition OPERATION.
CONTINUE GENERAL INSTALLATION
4. Connect both 1/2˝ NPT water lines (
and cold water inlet female and 3/8˝ flared LP gas line to the water
FIG 9).
heater (
a. Allow flexibility in water and gas lines so you can pull unit
forward through wall one inch past skin.
b. Seal gas line entrance opening (FIG 9) by sliding grommet (9-B)
onto 3/8˝ tubing (9-D) before flaring tubing (9-E). Pull gas line and
grommet through opening in housing (9-A). Connect flare fitting
(9-C) and press grommet into opening. If gas line tubing is
already flared, cut grommet on one side. Place split grommet
over gas line and press it into opening.
c. Always use pipe lubricant on threads when connecting hot and
cold water couplings. A suitable plastic fitting is recommended.
FIG 12). Install remote switch in a
FIG 10 & 11.
FIG 5
FIG 2) hot water outlet female
CAUTION
PRODUCT DAMAGE
• Do not lift, pull, push or misalign the main burner tube (FIG 3-F).
5. Erect side walls and cut opening. See chart and FIG 1.
Frame with 2x2 lumber (or equivalent).
CUTOUT
CAPACITY CUT OUT DIMENSION DEPTH
6. Bend all flanges 90˚ along scored lines (FIG 3-A).
7. To prevent water leaks caulk thoroughly around opening, including
bend slots. Butyl Tape (1-1/3˝x1/8˝) may be substituted for caulking
material.
8. Push unit against caulking, secure 4-corner brackets (
coach with No. 8 - 3/4˝ round head screws (not furnished) or equivalent.
Complete the installation by inserting the same type of #8 screws in the
holes provided around the flange of the water heater housing. Check all
gaskets, they must adhere to the pan creating an air tight seal.
2
(FIG 1 & 2)
Gallon 1-A 1-B 2-C
6 12-5/8˝ 16-1/4˝ 18.5˝
10 15-3/4˝ 16-1/4˝ 21.75˝
MINIMUM CLEARANCE FROM COMBUSTIBLE CONSTRUCTION
Sides: 0˝ Top: 0˝
Back: 0˝ Bottom: 0˝
FIG 3-B) to
INTENTIONALLY LEFT BLANK
15
Tank Maintenance
Failure to follow these instructions May result in Denial of Your Warranty Coverage!
Caution! Always turn off the main water supply (pump or water supply hook-up), allow the water to cool, then drain the tank by removing drain plug.
Frequency: Full-Time RV’er, Every (60) days (Southwest US, every (30) days). Part-Time RV’er, Minimum of 2X annually (Southwest, every (90) days).
Reason: The Life of the tank and performance of the water heater are directly affected by water quality! High mineral content will cause corrosion and
sediment deposits that shorten the life of the tank, element, relief valve, and Mixing Valve (XT Models). (Lack of proper maintenance of the tank will cause
Mixing Valves on XT Models to malfunction, requiring costly service procedures to clean and/or replace at the owner’s expense.)
Flushing the Tank
Winterizing
Prior to storing your RV, Follow Steps 1-4 of “Flushing the Tank” above. Note: The approximately (2) quarts of water that remains in the bottom of the
tank will not cause freeze damage to the tank. Caution!: An un-drained tank, (water level above the drain plug level), will crack the tank in freezing conditions.
Unpleasant Odors
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. To remedy the problem, first complete the (4) steps in “Flushing
the Tank” above. When the tank is flushed, perform the following:
1. Remove the Pressure/Temperature relief Valve. Mix a solution of (4) parts white vinegar to (2) parts water. (For a 6 gallon tank, use (4) gallons of vine
gar to (2) gallons of water.) With a funnel, carefully pour the solution into the tank through the P&T coupling. Re-install the P&T Relief Valve.
2. Turn on the water heater and allow the water to heat up through a full cycle (this may take up to 45 minutes.) It is recommended you allow the water
heater to operate through 3 or 4 additional heat maintenance cycles.
3. Turn off and allow to cool. When cool, remove the drain plug and drain. Then repeat Steps 3 and 4 of “Flushing the Tank” above.
4. Refill the tank with fresh water that contains no sulfur.
1. Turn off the main water supply (pump or water hook-up source) and allow water to cool.
2. Open the nearest hot water faucet to the water heater.
3. Pull the handle on the Pressure Temperature Relief Valve straight out and allow water to flow until it stops flowing.
4. Trip the handle on the relief valve allowing it to snap shut, shut off the hot water faucet, turn on the water supply, and turn the water heater on. Test.
Preventative Maintenance Requirements—Preservation of Warranty and Water Heater Life Extension
General—Burner Maintenance
• Periodically clear all obstructions in Burner Orifice and pilot Assembly (dirt, spider webs, etc.)
• Periodically clean Burner Tube with small brush
• Check air adjustment of Burner by positioning the air shutter 1/4 open (blue flame with small trace of yellow).
• Check Alignment of Burner tube and Orifice—Must be straight
• PILOT MODEL—Check orifice for contamination. Clean if flame is low, replace assembly if cleaning fails.
• ELECTRONIC MODEL—Check electrode for cracks and gap (Spark probe and Ground gap should be 1/8”)
1. Turn off the main water supply (pump or water hook-up source).
2. Drain the water heater by removing the drain plug. If the water flows sporadically or trickles instead of a steady stream, we recommend the following
action: First, open the Pressure/Temperature relief Valve to allow air into the tank and Second, using a small gauge wire or coat hanger, poke through
the drain coupling to dislodge any obstructions.
3. With the tank drained, approximately two quarts of water remain in the bottom (note drain plug position in illustration above). This water contains most
of the harmful corrosive particles. To remove these materials, Dometic recommends use of a commercially available “RV Water Heater Flushing
Tool”. Simply running water through the inlet does not stir up and flush out all sediment. The wand of a flushing tool allows you to move around at
different angles inside the tank with a higher pressure water jet, suspending and flushing the materials back out of the drain coupling. Continue flushing
until the water being flushed from the drain coupling runs clear.
4. Replace the drain Plug.
Dripping Pressure Temperature Relief Valve
A Pressure Temperature Relief Valve, dripping while the water heater is in use, DOES NOT mean it is defective. During normal use, water expands as it is
heated in the closed water system. The Dometic water heater is designed with an internal air gap at the top of the tank to absorb the expansion and reduce
the dripping. In time, this air gap will be absorbed and need to be restored. To restore the Air Gap:
XT Models—Special Requirements
If you experience low flow from the hot water faucet or notice the water is not as hot coming from the water heater, you may have to have the Mixing Valve
serviced by a Certified Service Technician. Low flow or cold flow from the XT water heater is a result of corrosion on the seats and/or debris blocking the
inlet screen (if equipped) of the mixing valve. When the technician removes the mixing valve, cleans the screen (if equipped) and soaks the valve in a hot
white vinegar bath, he will also complete the “Flushing the Tank” procedure as corrosion and sediment from improper “Tank Maintenance” is the cause of
this condition.
Altering Dometic Water Heaters
If the water heater has been altered the Warranty will be Void
Use of Aftermarket Heating Element Devices (Hot Rods) can lead to an out-of-control heating of water in the tank and catastrophic wet side explosion.
These devices lack critical safety controls. Personal injury and product damage may result. Replacing the Dometic drain plug with an Anode Rod will damage the coupling with cathodic action and product damage will result. Dometic water heater tanks are constructed of a high strength aluminum. The interior
of the tank consists of a .0015 thick, type 7072 clad aluminum (pure aluminum and zinc) fused to the core in the rolling process. This material protects the
tank from the affects of heavy metals and salts found throughout North America. It is anodic to these heavy metals and acts much like an anode in a steel
glass-lined tank, except it lasts much longer.
Use of Aftermarket Heating Elements or Anode Devices are not compatible with Dometic Water Heaters and will void the warranty!
9. Attach access door.
a. Snap hinge pin (
b. Slide cover (
c. Slide hinge pin into cover, snapping into clip at same time (
NOTE: To remove hinge pin, support access cover and apply force to
corner of hinge pin.
10. Disconnect unit and its individual shut-off valve from gas supply
line during any pressure testing of system in excess of 1/2 PSIG
(3.4 kPa, 14˝ water column [W.C.]).
than maximum indicated on rating plate of gas valve (13˝ W.C.).
Isolate unit from gas supply line by closing its individual manual
shutoff valve during any pressure testing ≤ 1/2 psig.
FIG 3-C) into clip (FIG 3-D).
FIG 3-E) onto hinge pin.
FIG 3-D).
DO NOT set inlet pressure higher
WARNING
FIRE AND/OR EXPLOSION
• DO NOT use matches, candles or other sources of ignition when
checking for gas leaks.
11. Turn on gas and check water heater and all connections for gas
leaks with leak detecting solution.
12. Fill water heater tank, check all connections for water leaks.
MIXING VALVE - (FIG 9)
WARNING
SCALDING INJURY
• Valve is not serviceable, it must be replaced.
• Replacement by a Certified Service Technician only.
• Tampering with valve will result in scalding injury.
• Tampering with valve will void warranty.
THIS VALVE IS A SAFETY COMPONENT AND MUST NOT BE REMOVED FOR ANY REASON
OTHER THAN REPLACEMENT. REMOVAL FOR REPLACEMENT BY A CERTIFIED SERVICE
TECHNICIAN ONLY
(moderating) valve which mixes cold water with higher temperature
water to moderate outlet water to approximately 130˚F. It is also
equipped with a higher temperature thermostat, raising the storage
water temperature.
. The water heater is equipped with a mixing
PRESSURE-TEMPERATURE RELIEF VALVE - (FIG 3-G)
WARNING
SCALDING INJURY
• Valve is not serviceable, it must be replaced.
• Tampering with valve will result in scalding injury.
• Tampering with valve will void warranty.
WARNING
EXPLOSION
DO NOT place a valve, plug or reducing coupling on outlet part of
•
pressure-temperature relief valve.
THIS VALVE IS A SAFETY COMPONENT AND MUST NOT BE REMOVED FOR ANY REASON
OTHER THAN REPLACEMENT.
temperature and pressure relief valve that complies with the standard
for Relief Valves and Automatic Gas Shutoff Devices for Hot Water
Systems, ANSI Z21.22.
If you use a discharge line, do not use a reducing coupling or other
restriction smaller than outlet of relief valve. Allow complete drainage
of both valve and line.
This water heater is equipped with a
FOR REPLACEMENT PARTS:
DO NOT install anything less than a combination temperature-pressure
•
relief valve certified by a nationally recognized testing laboratory that
maintains periodic inspection of product of listed equipment or
materials, as meeting requirements for Relief Valves and Automatic
Gas Shutoff Devices for Hot Water Supply Systems, ANSI Z21.22.
Valve must have a maximum set pressure not to exceed 150 psi.
• Install valve into opening provided and marked for this purpose on
water heater.
• Installation must conform with local codes or in the absence of local
codes, American National Standard for Recreational Vehicles, ANSI
A119.2/NFPA 50IC.
• For an external electrical source, ground this unit in accordance with
National Electrical Code ANSI/NFPA70.
now
Your DOMETIC WATER HEATER is
to HOW TO OPERATE YOUR WATER HEATER.
ready for operation. Continue
CONSUMER SAFETY WARNINGS
WARNING
EXPLOSION OR FIRE
• DO NOT store or use gasoline or other flammable vapors and liquids in
the vicinity of this or any other appliance.
• Should overheating occur, or gas supply fail to shut off, turn gas
OFF at the LP tank. On ELECTRONIC IGNITION MODEL turn operating
switch to OFF position and remove red wire from left hand terminal
of ECO switch or turn gas OFF at the LP tank.
• Use with LP gas only.
• Shut off gas appliances when refueling.
• Turn gas OFF at the LP tank when vehicle is in motion. This disables
all gas appliances. Gas appliances must never be operated while
vehicle is in motion. Unpredictable wind currents may be created
which could cause flame reversal in the burner tube, which could
result in fire damage. The thermal cut off fuse could also be
unnecessarily activated resulting in a complete shutdown of the
water heater requiring replacement of the thermal cut off. See
nance of electronic ignition water heaters for further
mainte
explanation of the thermal cut off.
• LP tanks must be filled by a qualified gas supplier only.
HOW TO OPERATE YOUR WATER HEATER
CAUTION
FIRE
• Do not smoke or have any flame near an open faucet.
If water heater has not been used for more than two weeks, hydrogen
gas may form in water line. Under these conditions to reduce the risk
of injury, open hot water faucet for several minutes at kitchen sink
before you use any electrical appliance connected to hot water system.
If hydrogen gas is present, you will probably hear sounds like air
escaping through the pipe as water begins to flow.
WARNING
SCALDING INJURY
• Do not tamper with orifice or mixing valve.
CAUTION
PRODUCT FAILURE
• Do not operate without water in tank.
90091 06/07/2016
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