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Lennox OHR23-105, Installation Instructions Manual

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Lennox OHR23-105 Installation Instructions Manual Download Page 3

Page 3

OHR23 Unit Parts Arrangement 

Figure 1

CLEAN−OUT PORT

CONTROL BOX

WITH FAN CONTROL BOARD

BECKETT

AFII BURNER

INDOOR
BLOWER

FLUE OPENING

HEAT EXCHANGER

CLEAN−OUT PORT

OHR23 Oil Burner Parts Arrangement

 

Figure 2

FB−HEAD

HEAD

INSULATOR

CLIP

RETAINING

1/4" HEX

HEAD SCREW

FB HEADS

ASSY FOR

AIR TUBE

ASSY.

ELECTRODE HEAD

NOZZLE LINE

PEDESTAL

ADAPTER

NOZZLE

AIR SCOOP

INLET

WHEEL

BLOWER

FLANGE

GASKET

MOTOR

4X4

BOX

IGNITOR   

DOOR GASKET

REAR ACCESS

COUPLING

FUEL PUMP

PLATE

ESCUTCHEON

NUT

SPLINED

DOOR ASSY

REAR ACCESS

ASSY

HOUSING

MAIN

SCREWS

AIR TUBE

FLANGE

ASSY

ELECTRODE

6

5

4

3

7

0

8

ELECTRONIC IGNITION

TRANSFORMER

PRIMARY

CONTROL

AIR

ADJ.
DIAL

CONNECTOR

TUBE

PRE−MOUNTED OIL−DELAY

VALVE

Summary of Contents for OHR23-105

Page 1: ...nes Sizing 12 Oil Supply Line Filter Connections 13 Leak Check 13 Electrical Wiring 14 Unit Start Up Adjustments 15 Service 16 Start Up Performance Checklist 17 Troubleshooting 18 RETAIN THESE INSTRUC...

Page 2: ...VIEW SIDE VIEW FRONT VIEW FLUE OUTLET 8 203 SUPPLY AIR OPENING HORIZONTAL POSITION DOWNFLOW POSITION OPTIONAL DOWNFLOW COMBUSTIBLE FLOOR BASE OPTIONAL DOWNFLOW ADDITIVE BASE Additive Base Raises Furn...

Page 3: ...RETAINING 1 4 HEX HEAD SCREW FB HEADS ASSY FOR AIR TUBE ASSY ELECTRODE HEAD NOZZLE LINE PEDESTAL ADAPTER NOZZLE AIR SCOOP INLET WHEEL BLOWER FLANGE GASKET MOTOR 4X4 BOX IGNITOR DOOR GASKET REAR ACCESS...

Page 4: ...combustible materi al as listed unit rating plate and in tables 2 or 3 Unit service and accessibility clearances take precedence over fire protection clearances Table 2 Horizontal Installation Clearan...

Page 5: ...tible materi al A minimum clearance of 1 must be maintained be tween bottom of furnace and combustible material Suspended Installation To suspend furnace remove knockouts in top of panel at warm air d...

Page 6: ...ometer Oil vacuum gauge Beckett T 500 gauge Knowledge of proper test equipment operation CAUTION Improper nozzle and or air adjustment of this unit may result in sooting problems Refer to the follow i...

Page 7: ...he chimney to determine whether repairs are necessary Make sure the chimney is properly constructed and sized according to the requirements of the National Fire Protec tion Association The smallest di...

Page 8: ...ey BAROMETRIC CONTROL IN EITHER LOCATION DRAIN FOR CONDENSATE FACTORY BUILT CHIMNEY Figure 9 BAROMETRIC CONTROL MAY BE INSTALLED IN EITHER VERTICAL OR HORI ZONTAL SECTION OF FLUE PIPE WITHIN 18 OF FLU...

Page 9: ...ted on a plat form in a confined space such as a closet or small equipment room Small leaks around the base of the unit at the platform or at the return air duct connection can cause a potentially dan...

Page 10: ...AIR Figure 13 NOTE EACH AIR DUCT OPENING SHALL HAVE A FREE AREA OF AT LEAST ONE SQUARE INCH 6 4 SQUARE CENTIMETERS PER 2 000 BTU 586 W PER HOUR OF THE TOTAL INPUT RATING OF ALL EQUIPMENT IN THE ENCLOS...

Page 11: ...efer to the manufacturers installation instruc tions for proper installation procedures and service parts information Do not use the same vent with any other appliance when using a sidewall vent syste...

Page 12: ...d a vacuum of 6 152 mm Hg or less a single stage fuel pump with a supply line and no return line should be adequate See figure 16 Manual bleeding of the fuel pump is required on initial start up Failu...

Page 13: ...erly 5 Tighten the bleed valve securely Two Pipe Systems If the installation requires a two pipe operation install the bypass plug included in the bag which is attached to the pump To convert the pump...

Page 14: ...r on thermostat ac cording to the wiring diagram sticker provided on unit 3 Install a separate fused disconnect switch near unit so power can be shut off for servicing 4 Complete line voltage wiring f...

Page 15: ...reached their highest and steadiest readings subtract the readings The difference in temper atures in the supply and return air plenums should approxi mate the temperature rise range listed in table 7...

Page 16: ...ice Servicing Filter NOTE Under no circumstances should the access panels to the blower compartment be left off or left partially open 1 Throw Away Type Filters Filters should be checked monthly and r...

Page 17: ...Burner Model No Serial Number Piping Connections Tight All Valves Open Blower Motor Lubrication OK Oil Pump Pressure recommended minimum 140 psi PROPER DRAFT Draft Reading recommended 03 to 04 inches...

Page 18: ...rner motor is de energized If heat fan has started it continues through the selected delay off period Established flame fails Burner motor is de energized and oil primary control goes into recycle mod...

Page 19: ...auxiliary limit Power Check furnace disconnect switch main disconnect Open switch Close switch switch main disconnect Blown fuse or tripped circuit breaker Replace fuse or reset circuit breaker Therm...

Page 20: ...e closed Open valve Oil Filters Oil Line Listen for pump whine Oil line filter is plugged Replace filter cartridges Oil Line Kinks or restriction in oil line Repair or replace oil line Plugged fuel pu...

Page 21: ...Cracked or burned lead insulators Replace electrode leads Ignition Transformer Connect ignition leads to the transformer Start burner and observe spark Check line voltage to transformer primary Low li...

Page 22: ...Safety Source Procedure Check Causes Correction Poor Fire If burner continues to r n does not Unbalanced fire Replace nozzle to run does not lock out of safety fault may be due to Too much air lean s...

Page 23: ...filters Clean or replace filter between line voltage connections to Burner running too slow Increase blower speed to maintain proper temp rise connections to primary control bl k hit Blower motor seiz...

Page 24: ...aks into heat exchanger around inspection door etc Correct cause of air leak CO2 if less than 10 Excessive draft Adjust barometric draft control for correct draft Incorrect burner head adjustment Corr...

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