21
EN
Maintenance And Care
I
Tampering with the P/T relief valve will void the
warranty.
23
P/T Relief Valve
The P/T relief valve is not serviceable. If the P/T relief
valve is found to be faulty, replace the valve.
This Water Heater is equipped with a P/T relief valve
that complies with the standard for Relief Valves and
Automatic Gas Shutoff Devices for Hot Water Systems,
ANSI 221.22.
If a discharge line is used, do not use a reducing
coupling or other restriction smaller than the outlet of
the P/T relief valve. Allow both the valve and the line to
completely drain.
A P/T 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 an RV, may cause the P/T relief valve to drip.
The Dometic water heater tank is designed with an
internal air gap at the top of the tank to reduce the
possibility of dripping. Over time, the expanding water
will absorb this air and it must be restored. Due to
variations in water quality, the P/T 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.
Replacement P/T Relief Valve Parts
• Do not install anything less than a combination P/T
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
221.22. The Valve must have a maximum set pressure
not to exceed 150 PSI (1034.21 kPa).
• Install the valve into the provided opening marked for
this purpose on the 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.
6.8 Using After-Market Water
Heating Element Devices
WARNING: EXPLOSION AND OR BURN
INJURY. Failure to obey the following
warnings could result in death or serious
injury:
• Do
not
use after-market heating elements. After
market heating elements can lack critical safety
controls.
• Do
not
use bug screens, anode rods or other non-
approved devices with this water heater.
• The use of after-market heating elements can lead to
uncontrolled water tank heating and tank explosion.
NOTICE:
The use of any after-market heating element
devices may result in damage to components or the
water heater.
Any alteration, such as the addition of an after-market
heating element device, will void the warranty.
