CONQUEST
®
WATER HEATER
29
PV500-71 02/16
WARNING: Do not plug the relief valve(s), use discharge piping smaller than the relief valve opening or
install a reducing coupling, valve or other restriction in the relief valve discharge line. Failure to comply with
these relief valve and discharge piping requirements can prevent the relief valve from providing its intended
temperature and pressure protection, which can result in a sudden loss of pressure containment that can
cause property damage, exposure to hazardous materials, personal injury or death.
9.2 Cathodic
Protection
PVI water heaters do not utilize cathodic protection. However, in hot water systems utilizing cathodic protection,
hydrogen gas can be produced when the hot water system has not been used for a long period of time (generally two
weeks or more).
Hydrogen gas is extremely flammable.
To prevent the possibility of injury under these conditions,
one of the hot water system faucets should be opened for several minutes before using any electrical device
connected to the hot water system. If hydrogen is present, there will be an unusual sound such as air escaping
through the pipe as the hot water begins to flow. Do not smoke, have open flames or turn electrical switches on or off
near the faucet at the time it is open.
9.3
Electronic Low Water Cut-Off
When the water level is above the electrode position in the tank, the reset pushbutton will energize the control (LED
will be lit). The control remains energized until the water level drops below the electrode position (LED will not be lit).
Unless otherwise specified, there is a three-second time delay on decreasing level. Water level must be below tank
probe location for full three seconds before control de-energizes. In the event that a low water condition occurs, a
failure message will be displayed on the controller touch-screen. This failure lockout can be reset by pressing the
LWCO RESET button located on the front control panel. Once the LWCO control board has been reset, the Main
Reset button located on the front control panel can be reset as well.
The Electronic Low Water Cut-Off probe is located in the top head of the water heater.
WARNING: Turn off all electrical service to the appliance when accessing the limit or other controls located
inside the control cabinet or inside the burner vestibule inside the top of the appliance. Close and fasten the
control cabinet and burner vestibule cover before restoring electrical service to the appliance. The cabinet
and burner vestibule contain High Voltage wiring and terminals. If the electrical service is not turned off and
these terminals are touched, a dangerous shock causing property damage, personal injury or death could
occur.
Coupez l'alimentation avant intervention sur l'appareil.
9.4 Operating Temperature Control
An adjustable digital operating control is located in the front control panel. The control is factory pre-set at
approximately 120
º
F. See the Electronic Operating System section in this manual for more information.
Le thermostat est réglé à environ 49 degrés Celsius. Températures de l'eau supérieures à 52 degrés Celsius peut
causer instantanément de graves brûlures ou la mort de brûlures. Suivez les instructions dans le manuel
d'installation pour modifier la température de l'eau.
9.5 High Water Temperature Limit
The Electronic Operating Control System (EOS) includes a single probe that contains a high water temperature limit
and a completely separate upper tank operating sensor. Since both these sensors are in the same location in the
heated storage tank, the EOS checks to be sure their output is within a degree or two of each other. If not, or if the
maximum water temperature exceeds 200ºF, the EOS will lockout and the manual reset button on the control panel
must be pressed before the heater will resume operation.
