Maintenance - RBI FUTERA III Series HeatNet Installation & Operation Manual

FUTERA III INSTALLATION AND OPERATION INSTRUCTIONS
RETURN TEMP < 130°F: If the Return Inlet temperature
is less than 130°F this warning will be displayed. This
warning does not affect operation and does not set the
alarm relay. A log entry is made to aide in diagnosing
why this may be occuring. Condensing will occur with
return temperatures below 130°F and a shortened heat
exchanger life will occur.
PREPURGE
RETURN TEMP < 130°F

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
Figure 19 for component identifi cation.
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.
LOCAL SET
41˚F
32
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.
7. A badly corroded or damaged heat exchanger must
be replaced, see the Heat Exchanger Repair &
Replacement section.
Heat Exchanger Cleaning
1. Close the shut off valves in the inlet and outlet piping.
On heating systems close the system fi ll valve and
relieve the system pressure from the boiler by carefully
lifting the relief valve or opening the drain valve.
2. Disconnect the boiler/water heater from the system
piping.
3. Remove the eight bolts on the rear pipe enclosure
panel.
4. Remove the front jacket panel and combustion
chamber door.
5. Slide the heat exchanger out of the unit.
6. Remove the "V" baffl e straps and "V" baffl es.
7. Thoroughly clean the heat exchanger with water from
a high-pressure hose. Use a soft bristle brush if
necessary.
8. Replace the cleaned heat exchanger and other
components in the reverse order of their removal.