Care And Maintenance - Carrier BW9 Series Installation Instructions Manual

ADJUSTMENTS AND CHECKOUT
NOTE: It is important that this appliance operate between 8.5
and 10% CO . To verify that the appliance is operating in this
2
range, follow the steps below:
1. Check incoming gas pressure to the appliance using a
water column manometer with resolution of 0.1 inch w.c.
or better and a range of 0 to 14 inches of w.c. Connect the
positive side of the manometer to the inlet pressure tap on
the gas valve by loosening the inlet pressure tap screw
from the raised port on the gas valve and sliding the
manometer hose over the port. (See Fig. 19.)
2. Drill a hole in the plastic CPVC vent pipe or exhaust tee,
just large enough to allow access for the sample probe of
your combustion analyzer.
3. Turn the thermostat to the closed position so the appliance
is activated.
4. Allow the appliance to run for approximately 5 minutes.
5. Insert the sample probe of your combustion analyzer into
the hole you drilled in step 2, about halfway into the
exhaust gas stream. Take a flue gas reading and observe
the CO value. Adjust the throttle screw until the CO
2
value is between 8.5 and 10%. Turning the throttle screw
clockwise decreases the rate and the CO
the throttle screw (See Fig. 19) counterclockwise increases
the rate and the CO
2
stabilize for approximately 1 minute after adjusting the
throttle screw before you take a reading with your
combustion analyzer.
6. After adjustments are made, turn the gas and electric
supplies to the boiler off. Remove the manometer hose
from the gas valve and tighten the screw on the inlet
pressure tap. Remove the CO meter and plug the hole in
the CPVC with 400_F high temperature silicone.
7. Return the thermostat switch to its original position.
THROTTLE ADJUSTMENT SCREW
Turn clockwise to decrease rate and CO
Counterclockwise to increase rate and CO
INLET
PRESSURE
TAP
INLET
MOLEX
PIN
HEADER
Fig. 19 --- Gas Valve
Final Checkout of the Installation
After any adjustment to the appliance, observe several complete
cycles to ensure that all components function correctly.
SET THERMOSTAT TO DESIRED ROOM
TEMPERATURE
Observe several operating cycles to verify proper operation.
REVIEW ALL INSTRUCTIONS
Review all instructions shipped with this boiler with owner or
maintenance person. Instructions must be affixed on or adjacent
to the boiler.
COMPLETE AND SIGN THE INSTALLATION AND
CHECK- -OUT CERTIFICATE AT THE END OF THIS
MANUAL.
value. Turning
2
value. Allow the appliance to
VENTURI VALVE
2
2
OUTLET
A06100

CARE AND MAINTENANCE

Maintenance as outlined below can be performed by the
owner unless otherwise noted.
The acidic nature of flue gases condensing on the aluminum
boiler sections will cause the formation of aluminum oxide. This
oxide formation is normal, is generally uniform throughout the
boiler sections, and represents a negligible mass of aluminum that
is consumed by oxidation during the life of the boiler. If left
unchecked, this buildup may eventually cause blockage of the
flue gas passages in the boiler sections, reducing efficiency, and
ultimately shutting down the boiler due to lack of combustion air
flow. Regular service and maintenance by a qualified service
agency must be performed to assure safe trouble free operation
and maximum efficiency. It is recommended to service the
appliance at least once every 12 months.
STEP 1 —Beginning of Each Heating Season
1. Schedule an annual service call by a qualified service
agency, which includes:
a. Examine flue passages between boiler sections, burner,
and condensate lines, and clean, if necessary, following
the annual examination and cleaning instructions listed
2
in Procedure 6.
b. Visually inspect venting and air intake system for
proper operation. If the vent or air intake show any
signs of deterioration or leakage, repair or replace them
immediately. Insure proper reassembly and resealing of
the vent and air intake system.
c. Check for and remove any obstruction to the flow of
combustion air or venting of flue gases.
d. Follow instructions for "PLACING BOILER IN
OPERATION."
e. Follow instructions for "CHECK OUT PROCEDURE
AND ADJUSTMENTS."
f. Visually inspect condensate drain line for proper
operation. Check for deteriorated or plugged
condensate drain line.
g. Check all gasketed joints for leakage, and tighten bolts
or replace gaskets, if necessary.
h. Remove jacket front and top panels and check for
piping leaks around relief valve and other fittings.
Repair, if found. DO NOT use stop leak compounds.
2. Check that boiler area is free from combustible materials,
gasoline, and other flammable vapors and liquids.
3. Circulator pump and blower motor furnished with boiler
are permanently lubricated from the factory and require no
further lubrication. Additional or non- -factory supplied
pumps and/or motors should be lubricated according to
the pump and/or motor manufacturer's instruction.
STEP 2 —Daily During Heating Season
1. Check for and remove any obstruction to the flow of
combustion air or venting of flue gases.
2. Check that boiler area is free from combustible materials,
gasoline, and other flammable vapors and liquids.
STEP 3 —Monthly During Heating Season
1. Remove jacket front and top panels and check for piping
leaks around relief valve and other fittings. If found,
contact a qualified service agency to repair. DO NOT use
stop leak compounds.
2. Test relief valve. Refer to
instructions packaged with relief valve.
3. Visually inspect venting and air intake system for proper
function. If the vent or air intake show any signs of
deterioration or leakage, contact a qualified service agency
to repair or replace them immediately and to insure proper
reassembly and resealing of the vent and air intake system.
20
valve manufacturer's