Dometic G6A-8E Service Manual page 30

Service Procedures

WARNING: BURN HAZARD, FIRE,
EXPLOSION, AND/OR CARBON MONOXIDE
HAZARD. Failure to obey the following
warnings could result in death or serious
injury:
• Keep the Water Heater area clear of combustible
cleaning materials, gasoline, and other flammable
vapors and liquids. Do not store or use gasoline or
other flammable vapors and liquids in the vicinity of
this or any other appliance.
• Be sure the unit is vented and sealed properly to avoid
the collection of carbon monoxide inside of the RV.
• All combustion air must be supplied from outside of
the RV. All combustion products must be vented to
the outside of the RV.
• Do not vent the Water Heater with a venting system
that serves another appliance.
• Do not vent the Water Heater to an outside enclosed
porch area.
• Protect building material from flue gas exhaust.
• Install the Water Heater on an exterior wall with
access to a door opening to the outdoors.
• Do not alter the Water Heater for a positive
grounding system.
• Do not high-potential test (HI-POT) the Water Heater
unless the DSI control board has been disconnected
(DC HI-POT).
• Do not use a battery charger to supply power to the
Water Heater at any time or when testing.
• Should overheating occur, or the gas supply fail to
shut off, turn the operating switch to the Off position
and remove the red wire from the left hand terminal of
the E.C.O. switch or turn the gas Off at the LP tank.
• Use with LP gas only.
• Shut off gas appliances and pilot lights when
refueling.
• Turn gas Off at the LP tank when the vehicle is in
motion. This disables all gas appliances and pilot
lights.
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• Gas appliances must not be operated while the
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 could also be unnecessarily activated,
resulting in a complete shutdown of the Water Heater
and requiring replacement of the thermal cut-off.
• If the Water Heater has not been used for more than
two weeks, hydrogen gas may form in the water line.
Under these conditions, to reduce the risk of injury,
open the hot-water faucet for several minutes at the
kitchen sink before you use any electrical appliance
connected to the hot-water system. If hydrogen gas
is present, you will probably hear sounds like air
escaping through the pipe as water begins to flow.
• Do not smoke or have any flame near an open faucet.
• Place the thermal cut-out back in the factory default
position after service. Do not over bend or under
bend the thermal cut-out.

WARNING: FIRE AND/OR ELECTRICAL SHOCK
HAZARD. Failure to obey the following
warnings could result in death or serious
injury:
• Make sure there are no obstacles (wires, pipes,
etc.) inside of the RV roof or walls at the installation
locations.
• Shut off the gas supply, disconnect the 120 VAC
power from RV, and disconnect the positive (+) 12
VDC terminal from the supply battery before drilling
or cutting into the RV.
• When a cord and plug connection to the power supply
is used on a Water Heater, the power cord must be
UL listed as suitable for damp locations, hard, or extra
hard usage. The cord must be a flexible type such as
S, SO, ST, STO, SJ, SJT, SJTO, HS, or HSO described in
the National Electric Code ANSI/NFPA 70. The length
of the external cord to the Water Heater, measured to
the face of the attachment plug, shall be no less than
2 ft (60.96 cm) and no more than 6 ft (182.88 cm).
The supply cord must be a minimum of 14 AWG. The
attachment plug must be rated at 15 A.
Water Heater
EN