NEW YORKER WC-90 (01) PDF Document

The following clearances must be maintained for the NEW YORKER WC-90 according to NFPA-89A. The unit must be installed on a non-combustible floor.

WARNING: UNDER NO CIRCUMSTANCES SHOULD THIS UNIT BE INSTALLED ON A COMBUSTIBLE FLOOR.

The package includes the following components:

1) Shell and Jacket

2) L6006A Operating Control Aquastat

3) L4006B Overheat Control Aquastat

4) Relief Valve

5) Drain

6) Gauge

7) Blower

8) Name Plate

9) Rating Plate

10) Ash Pan

The NEW YORKER WC-90 should be located as close as possible to the chimney inlet while maintaining acceptable clearances from all combustible materials. The location must permit access to both the flue pipe and chimney outlet for periodic cleaning.

FOUNDATION: The boiler is designed for non-combustible foundations only. A 4″ high, level, concrete pad on top of a non-combustible floor, the size of the boiler plus the required clearance dimensions, is required.

WARNING: DO NOT STORE OR USE FLAMMABLE LIQUIDS, ESPECIALLY GASOLINE IN THE VICINITY OF THE UNIT.

The chimney should be built according to the National Fire Protection Association Code. It should be solid masonry or reinforced concrete with a fire clay flue liner extending from 8 inches below the connection or flue throat.

1) The wall thickness should be a minimum of four inches.

2) Liner thickness should be a minimum of 5/8″.

3) The chimney should terminate three feet above the roof and two feet above any portion of any building within 10 feet.

The recommended chimney is a masonry with fire clay liner 8″ x 8″ x 15′ or equivalent. A cleanout for the chimney should be located approximately one foot below the flue entrance.

It is recommended that the NEW YORKER WC-90 boiler be connected to a separate chimney. However, the boiler and another fuel burning appliance may be connected to a single chimney or vent provided:

a. Sufficient draft is available for safe combustion in each appliance, and

b. Sufficient draft is available for removal of all products of combustion safety to the outdoors, and

c. Gas and oil appliances so connected shall be equipped with primary safety controls.

NOTE: WIRE FOR 120V-12G.

WIRE FOR 24V 18G.

WIRE SHOULD CONFORM TO NATIONAL AND LOCAL ELECTRICAL CODES.

EQUIPMENT IS TO BE GROUNDED ACCORDING TO STANDARD ELECTRICAL PRACTICES.

MAXIMUM OVERCURRENT PROTECTION IS 15 amp.

When used with zone valves, the L8124A & L6006A must be on the same circuit to prevent a short due to common use of C1 & C2 terminals.

L6006A – 120V Operating Control:

A manual switch activates this control once a fire is started. The combustion air blower switch (RB) closes and the circulator switch (RW) is open until the boiler water reaches the set point. At the set point (set at 190°F), the blower switch breaks and the circulator switch makes, allowing water to circulate between the add-on and primary boiler.

L4006B – 24V High Limit-Overheat Control:

This control acts as a 24-volt switch. In an overheat condition, it will open the system zone valve (largest zone) and activate the system circulator to dissipate excessive heat into the system. The control is set at 210°F.

A thermostat call for heat will open the zone valve or valves and start the system circulator. The oil or gas burner of the primary boiler will not fire if the NEW YORKER WC-90 boiler is able to maintain a water temperature above the high limit setting on the primary boiler (180°F). Failure to maintain sufficient temperature will activate the oil or gas burner.

When wood burns slowly, the smoke can contain creosote, which collects on combustion chamber surfaces, tubes, and the flue pipe. The main causes of creosote buildup are:

1) Wet or unseasoned wood.

2) Incomplete combustion.

3) Cool surfaces.

The best method of controlling creosote is to prevent its buildup by maintaining a briskly burning fire with dry, well-seasoned wood and by maintaining a flue temperature exceeding 250°F, which will prevent creosote condensation.

The blower on the NEW YORKER WC-90 has a fixed air shutter. The air setting should be fixed at an opening of 3/16″ to 1/2″. Do not alter this setting without consulting the factory. Larger openings will burn fuel rapidly and inefficiently, while smaller openings can smother the fire and create dangerous creosote or coal gas.

1) Ball up single sheets of newspaper and loosely stack paper balls and wood kindling.

2) Light the paper with a match and close the loading door.

3) Manually switch electrical power to the wood boiler operating control, which will activate the combustion air blower.

4) Allow several minutes for the kindling to ignite, then turn off the blower. Carefully open the loading door and gradually add split logs to the suggested load level.

5) Switch on the blower. Open the air shutter over the fuel bed slightly to relieve accumulated gases.

6) Adjust the barometric regulator to a maximum of -.04″ water column.

CAUTION: Care should be taken when opening the loading door to prevent possible flash-back of accumulated gases. This can be prevented by unlocking and opening the loading door very slowly. Never open the loading door with the manual switch in the open position. The blower should not be operating with the loading door open.

1) Follow the steps outlined to establish an operating wood fire.

2) Allow the wood to burn to a red-coal condition.

3) Turn off the blower and spread a thin, loose layer of anthracite coal. Close the door and turn on the blower.

4) Allow several minutes of blower operation to ignite the coal.

5) Then turn off the blower and gradually spread layers of coal to eventually reach the suggested bed level. Open the over-fuel bed air shutter slightly to prevent gas accumulation in the combustion chamber.

Wood: Stacked loosely to the middle of the loading door height. Approximately 60 lbs. for the NEW YORKER WC-90.

Coal: Maximum bed height to the lower edge of the loading door. Approximately 40 lbs. for the NEW YORKER WC-90.

CAUTION: Load carefully or damage will result. Do not burn garbage, gasoline, naphtha, or engine oil.

Manually open all zone valves and flow check valves to permit gravity circulation through the system. Light a small fire, approximately 1/4 to 1/2 of a normal load, and adjust the combustion air blower shutter and over-fuel air shutter to attain proper burning conditions. Do not expect to maintain maximum comfort conditions under power failure situations.

CAUTION: Care must be taken to prevent overheating of the boiler.

Follow this procedure in case of a runaway fire:

1) Shut off the combustion air blower – close or cover all air shutters.

2) Increase thermostats to maximum setting. Open all zone valves.

3) Open the barometric damper wide.

CAUTION: “Do not shut off power because circulation is needed to dissipate heat.” “Excessive heat caused by extreme over-firing may cause relief valve to blow off water.”

Shaking Grates:

It is not necessary to shake grates each time you refuel. Shake only when necessary to make room for more coal or to clear grates of excessive ashes. Use a few short strokes of the shaker handle until the first red glow appears in the ash pit. Stop shaking when you see the red glow. It is important to always carry a layer of ashes on the grates to prevent them from warping or burning out.

Removing Ashes:

Ashes must be removed from the ash pit on a daily basis and should never be allowed to accumulate high enough to contact the grates. This could cut off air circulation and result in warping or burnout of grates.

Disposal of Ashes:

Store ashes in a non-combustible metal container with a tight-fitting lid. The closed container should be placed on a non-combustible floor or on the ground, well away from all combustible materials, pending final disposal.

Wood: Burn dry and well-seasoned hardwood. Season wood for at least six months, preferably a year to eighteen months. Seasoned wood will often show cracks radiating outward from the heartwood. Wood should be split in quarters and be approximately 18″ in length.

Coal: Use stove grade anthracite coal. Chestnut size is preferable; however, pea size coal is acceptable.

1) Call your local fire department immediately.

2) Close all openings, the combustion air blower shutter, and draft controls on the boiler.

3) If the fire burns vigorously, squirt a multipurpose (ABC) dry chemical extinguisher or throw baking soda onto the fire. The chemicals will travel up the chimney and may extinguish the fire. If possible, avoid introducing water into the chimney, as it could damage the flue liner.

NOTE: A chimney fire can weaken or deform the chimney. The complete chimney should be inspected after a fire, and any necessary repairs should be made before restarting the boiler.

During the operating season, the boiler should be cleaned weekly to maintain efficiency and prevent flue and chimney fires.

Cleaning Procedure:

1) Turn off power, make sure the fire is out, and allow ashes to cool.

2) Vacuum all loose ash from the combustion area.

3) Brush the flue pipe and flue baffle.

4) Clean the walls of the firebox and empty all debris from the ash pan.

5) Reverse the procedure in preparation for firing.

BLOWER: The blower motor should be oiled according to the instructions of the blower manufacturer.

COIL GASKET: The coil gasket should be inspected regularly to ensure a proper seal.

RELIEF VALVE: The relief valve should be tested yearly at the beginning of the heating season. Test the valve by operating the hand lever. Observe the valve closely after the test to be sure it is closing tightly and does not drip.

INTERNAL BAFFLE: Inspect the internal flue baffle periodically for damage or deterioration. A non-functioning baffle should be replaced.

SMOKE PIPE: Inspect the smoke pipe on a regular basis during the heating season. Whenever possible, dismantle and clean it out. Examine it for defects like corrosion or seams coming apart, and replace if any defects are noticed.

Fire Side Care:

Immediately following the last firing of the season, when the boiler is cool, clean the tubes and other heating surfaces thoroughly and scrape down to clean metal. Clean the smoke box, ash box, and other areas where soot or scale may accumulate to prevent corrosion from damp residue.

It is advisable to keep the loading door, ash pit door, and smoke hood open for air circulation. The manual flue damper should be in the closed position.

Swab the heating surface with neutral mineral oil to protect against rust.

If the boiler room is damp, place a tray of calcium chloride, slaked lime, quicklime, or silica gel in the combustion chamber to absorb moisture. An alternative is to place a light bulb in the chamber to maintain a warm and dry environment.

Water Side Care:

The boiler water legs and tube sheet should be flushed yearly. Refill the boiler immediately after flushing and heat the water to at least 180°F to dissolve gases. Add boiler water treatment chemicals as needed to prevent scaling or corrosion, maintaining a pH between 7 and 9.

To test the LWCO:

1. Shut off the fuel supply.

2. Lower the water level in the system until it is BELOW the LWCO.

3. Generate a boiler demand by turning up the thermostat.

4. The boiler should not attempt to operate.

5. Increase the water level by filling the system.

6. The boiler should attempt to operate once the water level is above the LWCO.