Water Heater; Operating Instructions; Water Heater Bypass; High Altitude Deration - Jayco SEISMIC 2021 Owner's Manual

Water Heater

The water heater manufacturer has preset the sensing limit to maintain the water temperature
when the water heater is activated.
Hydrogen gas may result if you have not used the water heater for two
weeks or more. HYDROGEN GAS IS EXTREMELY FLAMMA-
BLE. To reduce the risk of injury under these conditions, 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 is
present, you may hear what sounds like air escaping through the pipe as
the water begins to flow. Hydrogen gas may be present even after water
has been drained from the water heater tank. Open the faucet at the sink
and allow the system to vent for five to ten minutes. Do not smoke or
have any open flame near the open faucet while venting. On DSI water
heater models, make sure the switch is OFF.
Do not alter the operation or change the design/construction of your wa-
ter heater. For your safety, only factory authorized parts should be used
on your water heater. Accessories marketed for recreation vehicles, such
as an "add-on" electric heating elements, are not recommended by the
manufacturer.
create an unsafe condition and will void all warranties.
If you smell propane gas then STOP! and follow the procedures listed
in the Propane System Section before attempting to operate the water
heater.

Operating Instructions

Read the safety and operating information provided in the manufacturer's manual located in
your warranty packet before attempting to activate the water heater.
Make sure the water heater is filled with water before use as even momentary operation of
the water heater without water in it may result in damage to the tank heating element and/or
controls. Double check the bypass valves, make sure they are set properly.
Always open both the hot and cold water faucets when filling the fresh water tank to allow
air pockets to be forced out of the water heater.
Water heater switch (if so equipped)
The "propane GAS" switch enables propane operation of the water heater, and the "ELEC-
TRIC" switch enables electric operation.
NOTE: Water heaters in certain models will ONLY have a single LP Gas water heater
switch. These units will not heat water electrically.

Water Heater Bypass

Use the factory installed water heater bypass, available in most floor plans, to avoid filling
the entire water heater with RV antifreeze. See the Utility Center section for details on using
the bypass system.

High Altitude Deration

Operation of the water heater at high altitudes may require derating. If the water heater is not
properly derated, lack of sufficient oxygen for combustion may produce improper burner
operation. Pilot outage caused by burner lift-off or sooting from a yellow burner may occur,
Such items are not approved to be installed and could
Section 8: Plumbing System
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