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507148-01

Page 3 of 14

Issue 1406

INSTALLATION

For attic installations, a booster oil pump may be required 

to supply oil to the oil burner. Check state and local codes 

for specific requirements.

Clearances

A minimum of 24” is recommended in front of the furnace 

for servicing the burner on all models.

See Table 1 for a complete listing of the minimum clearances 

required for basement type and upflow installations. 

Read all instructions before starting work so installation 

will conform to Underwriters’ Laboratories or Canadian 

Standards Association requirements. The furnace must be 

level when placed on its foundation (upflow, counterflow, and 

basement models) or in its suspended position (horizontal 

models). Using a carpenter’s level, check the furnace in at 

least two directions. The weight must be distributed evenly 

before the duct work is attached.

These instructions must be placed on or near the 

furnace in a conspicuous place.

Inspection of Shipment

This furnace is shipped in one package, completely 

assembled and wired.

 

The thermostat is shipped in a 

separate carton when ordered.

Upon receipt of equipment, carefully inspect it for possible 

shipping damage. If damage is found, it should be noted on 

the carrier’s freight bill. Damage claims should be filed with 

the carrier immediately. Claims of shortages should be filed 

with the seller within 5 days.

 

Location

Locate the furnace as centrally as possible so that all warm 

pipes to the various rooms are nearly the same length. This 

allows each room to receive an equal and proper amount of 

heat. This may vary with each particular installation.

Position the furnace so the pipe connection to the chimney 

will be of minimum distance and have a minimum of fittings.

In utility rooms or similar installations, the door or access 

opening should be large enough to permit replacement of 

the furnace, or another appliance such as a water heater, 

without disturbing any other equipment.

In any installation where damage from oil may occur, 

a drain pan must be installed. The drain pan must be 

large enough size to completely prevent any potential 

oil damage. The drain pan piping must be sized to drain 

the oil pump capacity and the piping must be routed to 

drain the oil back to the oil tank.

  WARNING

Minimum Clearances to Combustibles – Upflow Installations

Table 1

*  A passage, suitable for a large person, shall be provided between the furnace and chimney for inspection or replacement of the flue connector 

when necessary. A clearance of 24” shall be allowed at the rear and on one side of the furnace for service and cleaning of the blower.

**  The minimum clearance shown to the flue pipe may be reduced by using special protection permitted by local building codes and National 

Fire Protection Association Standards and CSA 139.

Basement Type Units

Hi - Boy (Upflow)

LBF & LBR

LUF

67/87

104/118

67/87

104/118

Top of Plenum and Duct Work

2”

2”

2”

2”

Plenum Sides

3”

3”

3”

3”

Furnace Sides

6”*

6”**

0”

0”

Furnace Rear

24”

24”

0”

0”

From Front Door 

4”

4”

4”

4”

Flue Pipe Clearance to Combustibles**

9”

9”

6”

6”

Type of Floor 

Comb.

Comb.

Comb.

Comb.

Combustion Air Openings (2 req’d)

10” x 20”

11” x 22”

10” x 20”

11” x 22”

Summary of Contents for L85BF Series

Page 1: ...actions that could cause property damage personal injury or death WARNING Never burn garbage or paper in the heating system and never leave rags paper or any flammable items around the unit CAUTION This furnace is not approved for installation in a mobile home Do not install this furnace in a mobile home Installation in a mobile home could result in actions that could cause property damage persona...

Page 2: ... adjust pressure to 145 or 150 psig ____________________________________________ Always verify proper pump pressure to corresponding tables with instructions supplied with unit F After 10 minutes of operation obtain flue temperature reading 1st __________ 2nd __________ 3rd _________ G Obtain smoke reading 1st __________ 2nd __________ 3rd _________ H Measure CO2 1st __________ 2nd _________ 3rd _...

Page 3: ...e nearly the same length This allows each room to receive an equal and proper amount of heat This may vary with each particular installation Position the furnace so the pipe connection to the chimney will be of minimum distance and have a minimum of fittings In utility rooms or similar installations the door or access opening should be large enough to permit replacement of the furnace or another a...

Page 4: ...un full size to a location outside the confined space and completely sealed so that no air from the confined space can be circulated through the heating duct system Outdoor Make Up Air A minimum mixed return air temperature of 60 65 F must be maintained for outdoor make up air to prevent condensation and corrosion Venting Chimney Before installing the furnace a thorough inspection of the chimney s...

Page 5: ...ncrete chimney lined with a lining material acceptable to the authority having jurisdiction 11 When two or more appliances vent into a common flue the area of the common flue should not be less than the area of the largest flue or vent connection plus 50 of the areas of the additional vents or flue connections The chimney must be able to sufficiently vent all appliances operating at the same time ...

Page 6: ...n of this furnace has been approved for horizontal venting with the following mechanical vent systems Refer to the manufacturer s installation instructions for proper installation procedures and service parts information Vent systems are available through the local distributor Barometric draft control must be used in the horizontal venting sidewall system It must be located within 18 of the furnac...

Page 7: ...he appliance All wiring must be appropriate Class I wiring Wiring must be installed in rigid metal conduit intermediate metal or be otherwise suitably protected from physical damage Refer to the wiring diagrams supplied with the venter kit for proper electrical connections 2 Visually inspect the venting system for proper size and horizontal pitch and determine there is no blockage or restriction l...

Page 8: ...lected cooling CFM Passive and Active Dehumidification For situations where humidity control is a problem a dehumidification feature has been built into the variable speed motor At the start of each cooling cycle the variable speed motor will run at 82 of the rated airflow for 7 5 minutes After 7 5 minutes has elapsed the motor will increase to 100 of the rated airflow To achieve additional dehumi...

Page 9: ... CFM 50 Static Heat Set ting A Heat Set ting B Heat Set ting C Heat Set ting D Cool Setting A Cool Set ting B Cool Set ting C Cool Set ting D L885UFC67V14 1 2 D 1200 1500 1400 1300 1200 1400 1200 1000 800 L85UFC87V14 1 2 A 1500 1500 1400 1300 1200 1400 1200 1000 800 L85UFC104V20 3 4 C 1550 1850 1730 1550 1400 2000 1800 1600 1200 L85UFC118V20 3 4 A 1850 1850 1730 1550 1400 2000 1800 1600 1200 L85BF...

Page 10: ...ampling hole should be at least two flue diameters above the breech or elbow at the breech but ahead of the barometric damper 2 Operate burner for approximately 5 to 10 minutes 3 Take a draft reading at the service hole in the flue outlet Adjust barometric draft control in the stack to achieve an overfire draft of 01 to 02 and a breach of 02 to 04 4 Pull and record a smoke reading at the service h...

Page 11: ...ent against the center lines marked on the gauge 2 If nozzle is not centered but found to be too far left or right a new nozzle will need to be ordered Do not attempt to adjust by bending the 90 elbow in oil line Sequence of Operation Heating see Figure 13 on page 12 Thethermostatcallsforheat activatingtheburnermotor After a 15 second pre purge period power is sent to the burner and ignition is es...

Page 12: ...dification mode After 7 5 minutes the blower motor runs at 70 of the selected cooling air flow until 1st stage cooling demand is satisfied A call for 2nd stage cooling from the thermostat closes the R to Y2 circuit on the blower interface board The blower motor ramps up to 100 of the selected cooling air flow When the demand for cooling is met the blower ramps down to Y1 until satisfied then ramps...

Page 13: ...s Department 11 West 42nd Street New York NY 10036 MAINTENANCE AND SERVICE Oil Burner It is recommended that the nozzle and oil filter be checked before each heating season Also recheck the conditions shown on the OIL FURNACE START UP CHECKLIST found on page 2 Close the oil line shutoff valve if the burner is shut down for an extended period of time Flue Pipe Have the flue pipe inspected annually ...

Page 14: ...507148 01 Page 14 of 14 Issue 1406 Figure 17 Wiring Diagram P N 48252 001 ...

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