28
FUTERA III INSTALLATION AND OPERATION INSTRUCTIONS
STANDBY REMOTE DISABLED: Indicates that the boiler
start interlock is open. This usually indicates that either a
building management system or a remote thermostat has
disabled the boiler.
PREPURGE: The boiler performs a 10 second fan pre-purge
to push out any gases that might still be in the combustion
chamber before the boiler fires.
PILOT RUNNING: This is displayed during the pilot flame
establishing period.
MAIN MODULATION: This indicates when the boiler has
successfully established a pilot flame and the main valve
has opened. The screen will also display the rate of
modulation as a percentage.
POSTPURGE: The boiler performs a 10 second fan post-
purge to push out any gases that are still in the combustion
chamber after the flame is extinguished.
HONEYWELL ALARM: Indicates that there is a call for heat
and the Honeywell Burner Control is locked out. Either it is
locked out due to a flame failure, or it is malfunctioning. Press
the reset button on the Burner Control.
LOCKOUT HIGH LIMIT: Indicates that the high limit controller
has opened due to a high outlet water temperature. To reset
press the red button on the high limit controller inside the
upper cabinet. The high limit should be set at least 20
°
F above
the target temperature for the boiler.
LOCKOUT AIR FLOW: Indicates that there is inadequate
airflow through the boiler. Check the air filter for debris, or for
any materials obstructing the flue outlet. Check the blocked
flue switch, it may have to be reset.
LOCKOUT GAS PRESSURE: Indicates that either the low
gas or high gas pressure switches have opened. These
switches are manual reset.
LOCKOUT WATER LIMIT: Indicates that the water flow switch
is not proving adequate water flow through the boiler or the
low water cutoff is sensing low water.
LOCKOUT HI-LIMIT & WATER LIMIT: Indicates that both the
high-limit and water limit interlocks are open.
LOCKOUT HI-LIMIT & GAS PRESSURE: Indicates that both
the high-limit and gas pressure interlocks are open.
MULTIPLE INTERLOCK: Indicates that there are more than
2 interlocks that are open. Check the high-limit, gas pressure
switches, and water flow switch.
LOCKOUT TEKTRA ALARM: Indicates a problem with the
RBI Modulating Control. This is usually the result of a short
or open circuit in one of the temperature sensors. Inspect
the sensor in question to see if it is connected properly. Also,
check to see if the sensor is shorted or open using an
ohmmeter.
MAINTENANCE
WARNING: Disconnect electrical power and close
the manual gas shut off valve before performing
maintenance or severe personal injury may result!
CAUTION: Servicing, inspection and adjustment must
be done by a trained technician in accordance with all
applicable local and national codes. Improper servicing
or adjustment can damage the boiler/water heater!
The boiler/water heater must be cleaned and inspected at
least once a year and before each heating season. Make
sure that the burner and ignition components are free from
dust, soot, dirt, corrosion or other deposits that would impair
the boiler/water heater ‘s performance. Refer to page 31 and
32 for component identification.
CAUTION: Improper burner servicing can result in
premature burner failure voiding the warranty!
Burner Removal
1.
Close the manual shutoff valves in the gas supply line
and turn off electrical power to the boiler/water heater.
2.
Remove the jacket top panel.
3.
Disconnect the wires to the fan and remove the four
bolts that secure the fan to the transition piece.
4.
Remove wires from the spark rods and remove the UV
sense from the transition piece.
5.
Disconnect the compression nut at the back of the
transition piece to remove pilot gas tubing.
6.
Remove the four nuts holding the transition piece to the
heat exchanger.
7.
Lift and remove the transition piece and burner together
from the boiler/water heater, taking care not to damage
the spark rods and or their alignment.
8.
Disconnect the compression nut from the inside of the
transition piece.
9.
Remove the transition piece, taking care not to damage
the spark rods and or their alignment.
Heat Exchanger Inspection
1.
Close the manual shutoff valves in the gas supply lines
and turn off electrical power to the boiler/water heater.
2.
Remove burner following the instructions in the
Burner
Removal
section.
3.
Remove the front jacket panel and combustion chamber
door.
4.
Inspect the inside and outside of the heat exchanger
for signs of damage, sooting or corrosion.
5.
The outside surfaces of the copper tubes should be free
of any soot deposits. A slight black smudge is normal with
some types of gases. Black soot indicates poor
combustion. Green deposits indicate condensation due
to low return water temperatures. In either case the heat
exchanger must be cleaned thoroughly and the problem
resolved before the boiler/water heater is returned to
service.
6.
If there are no signs of damage, sooting or corrosion,
reassemble the unit following the previous steps in
reverse order.
