7
THE ELIMINATOR (SELF-CLEANING SYSTEM)
These units include The Eliminator (Self-Cleaning System)
installed in the front water inlet, See Figure 1. The Eliminator
must be oriented correctly for proper function. There is a marked
range on the pipe nipple portion of the Eliminator, that must be
aligned with the top of the inlet spud. A label above the jacket
hole has an arrow that will point to the marked portion of the pipe
nipple if the orientation is correct. If the arrow does not point
within the marked range on the pipe nipple, adjust the pipe nipple
to correct. A pipe union is supplied with the Eliminator to reduce
the probability of misaligning the Eliminator accidentally while
tightening the connection to the inlet water supply line. Improper
orientation of the Eliminator can cause poor performance of the
heater and can signi
fi
cantly reduce outlet water temperatures
during heavy draws.
Note: The inlet tube may have 1, 3 or 7 cross tubes.
FIGURE 1
For proper function, the Eliminator must be oriented correctly.
There is a marked range on the pipe nipple that must be aligned
with the top of the inlet spud (check for label on the appliance)
to assure proper operation. Please check to confirm that
the marked range is in alignment with the top of the spud. A
pipe union is supplied with the Eliminator to help eliminate
the possibility of changing the orientation by accidentally
overtightening the inlet supply. Improper orientation of the
Eliminator may cause temperature buildup issues or spells of
colder than usual water temperatures.
HIGH LIMIT SWITCH
The digital thermostat (Figure 2) contains the high limit (energy
cutoff) sensor. The high limit switch interrupts main burner gas
fl
ow should the water temperature reach 203°F (95°C).
In the event of high limit switch operation, the appliance cannot be
restarted unless the water temperature is reduced to approximately
120°F (49°C). The high limit reset button on the front of the control
then needs to be depressed.
Continued manual resetting of high limit control, preceded by
higher than usual water temperature is evidence of high limit
switch operation. The following is a possible reason for high limit
switch operation:
• A malfunction in the thermostatic controls would allow the gas
valve to remain open causing water temperature to exceed the
thermostat setting. The water temperature would continue to
rise until high limit switch operation.
Contact your dealer or service agent if continued high limit switch
operation occurs.
DIGITAL THERMOSTAT
FIGURE 2
ELECTRONIC IGNITION CONTROL
Each heater is equipped with a ignition module. The solid sate
ignition control (Figure 3), ignites the main burner by utilizing a
silicone nitride ignitor. The silicone nitride ignitor shuts off during
the heating cycle and the main burner
fl
ame is sensed through
a remote
fl
ame sensor integral to the silicone nitride ignitor
assembly.
The ignition control will try to ignite the main burner three times
before lockout. Then it waits one hour before trying again to ignite
the main burners. This is a continuous cycle.
IGNITION CONTROL BOARD
FIGURE 3
EXHAUST INDUCER (BLOWER ASSY.)
The SBD85500NE/SBD85500PE models are equipped with an
exhaust inducer. The inducer assists in drawing in fresh air to the
unit for combustion and then assists in dispensing the combustion
by-products into the venting leading outside.
The exhaust inducer is equipped with a gravity controlled damper
to reduce the amount of heat loss through the
fl
ue, improving
ef
fi
ciency.
EXHAUST INDUCER
FIGURE 4
FAILURE TO FOLLOW THESE INSTRUCTIONS CAN RESULT IN
SERIOUS PERSONAL INJURY OR DEATH.
UNCRATING
The heater is shipped with the inducer already installed. The
wiring conduit runs from the thermostat to the inducer. Before
turning unit on, check to make sure the wiring conduit is securely
plugged into the inducer.
FEATURES AND COMPONENTS
