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5

240011511 REV. C [05/31/2017]

WARNING

Fire hazard. Do not install furnace on tiled floors or 

carpeting. Failure to follow these instructions could 

result in death or serious injury.

!

   

5. Locating the Unit - [See Table 2]

• 

Locate furnace so flue connection to chimney is short, direct 

and consists of as few elbows as possible. 

•  Centralize furnace location with respect to supply and return 

air ductwork. Central location minimizes trunk duct sizing. 

• 

All models may be installed on combustible floors.

• 

Do not install furnace on carpet or tiled floors.

  Table 2:  Minimum Installation Clearance

Location

Clearance to Combustibles

LRF and LRFV

Top

1" (26mm)

Bottom

0"

Plenum

1" (26 mm)

Rear

6" (152 mm)*

Sides

1" (26 mm)**

Front

1" (26 mm) *

Flue Pipe

5" (127 mm)

Enclosure

Closet

* 24" (610 mm) Service Clearance
** 18"  (457 mm) required from on side for access to rear

Maintain all clearances to combustibles. See Table 2. 

6. Furnace Used In Conjunction With Air 

Conditioning

•  Install furnace in parallel with or upstream from evaporator 

coil to avoid condensation in heat exchanger.

•  When installed in parallel, prevent chilled air from entering 

furnace by use of dampers or other air controlling means.

•  Manually operated dampers must have a control to prevent 

operation of either system unless dampers are in full heat or 

full cool position.

•  Air heated by the furnace shall not pass through evaporator 

coil unless coil is specifically approved for such service.

•  Check and adjust blower speed to compensate for pressure 

drop caused by evaporator coil.

•  Maintain required clearance between bottom of coil drain pan 

and top of heat exchanger as specified by coil manufacturer.

•  Cased evaporator coils with cases that are slightly larger 

than the furnace cabinet may be used by employing field 

fabricated block off plates to close gap between furnace 

cabinet and coil casing. See Figures 1a and 1b.

•  Cased evaporator coils with cases that are smaller than 

the furnace cabinet should not be used as they will restrict 

airflow.

FIGURE 1b: Evaporator Coil Centered Over 

Narrow Furnace

FIGURE 1a: Evaporator Coil 

Block-Off Plates

Summary of Contents for LRF65

Page 1: ...RFV Lowboy Rear Flue Model with ECM Blower Oil Fired Warm Air Furnaces P N 240011511 Rev C 05 31 2017 ECR International 2210 Dwyer Avenue Utica NY 13501 web site www ecrinternational com INSTALLATION...

Page 2: ...Weight Width A Length B Height C Supply D x E Return F x G Diameter Height H LRF LRFV 22 53 33 8 20 x 18 20 x 18 8 5 29 20 x 20 x 1 240 LB 55 8 cm 135 9 cm 85 4 cm 52 1 cm x 45 7cm 52 1 cm x 47 3cm 1...

Page 3: ...ifier 7 16 Piping Installation 7 17 Oil Filter 7 18 Oil Burner Nozzles 8 19 Oil Burner Adjustment 8 20 Burner Electrodes 8 21 Burner Primary Safety Control 8 22a Circulating Air Blower LRF LRFV 8 22b...

Page 4: ...stitute of Canada HRAI or by other means prescribed or approved by the local authority having jurisdiction United States Manual J titled Load Calculation published by the Air Conditioning Contractors...

Page 5: ...furnace in parallel with or upstream from evaporator coil to avoid condensation in heat exchanger When installed in parallel prevent chilled air from entering furnace by use of dampers or other air c...

Page 6: ...oint for most of furnace electrical components United Technologies 1158 120 has an adjustable fan on time set by selecting dipswitch combination displayed in Chart 1 Fan on delay can be set at 30 60 9...

Page 7: ...rom electronic fan timer board where provisions have been made for connections but should have their own controls Do not use direct drive motor connections as a power source there is risk of damaging...

Page 8: ...itive If problems persist call your service contractor WARNING Fire burn asphyxiation hazard Do not start the burner unless blower access door is secured in place Failure to follow these instructions...

Page 9: ...gs Blower speed and on off time delays are handled by ECM motor programming and are set via dipswitches per Table A 10 Heating airflow rate is SW1 and on off delay is SW4 both are set according to fir...

Page 10: ...all for heat Burner should start It may be necessary to press RESET button on primary combustion control relay 2 There is a fan on time delay before circulating fan is energized United Technologies 11...

Page 11: ...GPH Head Air Setting LRF65 LRFV65 66 000 AFG70MPSS 0 50 45 W 140 0 55 L2 4 LRF80 LRFV80 78 000 AFG70MPSS 0 50 45 W 175 0 65 L2 5 LRF90 LRFV90 89 000 AFG70MPSS 0 60 60 W 175 0 75 L2 7 LRF100 LRFV100 10...

Page 12: ...3 APPENDIX A CHECK OUT AND ADJUSTMENTS Table A 4 Riello 40BF Burner Set Up Riello 40BF3 40BF5 Series Oil Burners For use with direct vent units using outdoor combustion air only Furnace Model Output...

Page 13: ...ce above horizontal center line 13 64 inch Distance ahead of nozzle 5 64 to 7 64 inch Carlin Burners Electrode gap 1 8 inch to 5 32 inch Distance above horizontal center line 5 16 inch Distance ahead...

Page 14: ...blower motor Isolate AC line voltage pins on 5 pin power connector with electrical tape to prevent electric shock hazard C Restore electrical power to furnace D Set thermostat above room temperature E...

Page 15: ...15 240011511 REV C 05 31 2017 APPENDIX A CHECK OUT AND ADJUSTMENTS FIGURE 3 UNITED TECHNOLOGIES 1168 1 ECM TAP BOARD LRFV FIGURE 2 UNITED TECHNOLOGIES 1158 120 FAN TIMER BOARD LRF...

Page 16: ...A CHECK OUT AND ADJUSTMENTS TIP Formulas will assist with design of duct work and determination of air flow delivery CFM Bonnet Output 1 085 x System Temperature Rise T System Temperature Rise T Bonn...

Page 17: ...ON is approximately equal to 400 CFM SW3 ADJUST Increase OR decrease CFM respectively APPENDIX A CHECK OUT AND ADJUSTMENTS Table A 11 Direct Drive Blower Characteristics 1 2 HP ECM Variable Speed Cons...

Page 18: ...11 Direct Drive Blower Characteristics 1 2 HP ECM Variable Speed Constant CFM Motor continued DELAY PROFILE FOR OIL HEATING SW4 DELAY DIP SWITCH POSITION INPUT USGPH PRE RUN ON DELAY TIME CFM LEVEL SH...

Page 19: ...19 240011511 REV C 05 31 2017 APPENDIX B WIRING DIAGRAMS Chimney Vent Furnace Wiring Diagram LRF LRFV...

Page 20: ...20 240011511 REV C 05 31 2017 APPENDIX B WIRING DIAGRAMS Direct Vent Furnace Wiring Diagram LRF LRFV...

Page 21: ...at cool speed Thermostat ends call for cool G and Y terminals are de energized Cooling contactor is de energized immediately Circulator fan turns off immediately FAN Thermostat begins call for fan G...

Page 22: ...stage of two stage cooling Y1 while Y Y2 is not calling The 24 VAC input signal is passed to pin 6 of P1 Blower runs at 80 of cooling speed profile FAN Thermostat calls for fan G The 24 VAC input sig...

Page 23: ...ay burn out heat anticipator of standard 24 vac thermostat or cause harm to components within micro electronic thermostat Before checking oil primary control perform these preliminary checks repair or...

Page 24: ...epair light leak if necessary Open safety switch Check for open limit or auxiliary limit Check internal wiring connections loose connectors etc Furnace will not start without first pushing oil primary...

Page 25: ...supplier Frozen oil line Gently warm oil line Insulate oil line Outdoor piping size may require increased diameter Oil burner sputtering at nozzle Electrodes out of adjustment or defective Check elec...

Page 26: ...e rise is too high speed up blower fan Defective high limit control Test high limit function of all limit switches Use duct thermometer to verify accuracy of limit control Check for obstructions to ai...

Page 27: ...05 31 2017 Model No Serial No Date Installed Contractor Contact Address Postal Code Telephone No After Hours No Fuel Supplier Fuel Oil Supplier Contact Telephone No After Hours No APPENDIX D HOMEOWNER...

Page 28: ...pe Assembly 3002317 23 Flue Pipe Insulator Pipe 29713 24 Flue Pipe Flange 109009797 25 Flue Pipe Gasket 3 per unit 240011382 26 Observation Port Sight Glass 240008235 27 Sight Glass Washer 109009449 2...

Page 29: ...BOF 130 F 30388 40 Oil Burner Assembly Beckett AFG70MPSS 0 50 45 W 550003220 Oil Burner Assembly Riello 40F3 0 55 80 B 550003221 Oil Burner Assembly Carlin EZ LF 0 50 70 B 550003222 41 Filter Side Rai...

Page 30: ...sure Switch for use with Beckett Burners 0 65 WC Blocked Vent Safety Switch 240011862 5 x 4 Appliance Adapter Connects Furnace to Vent Pipe 240011898 Combustion Air Intake Collar 4 for Beckett Burner...

Page 31: ...0011511 REV C 05 31 2017 PARTS LISTING Model LRF LRFV Diagram 1 2 3 4 8 7 9 11 14 15 16 16 27 28 30 31 32 33 34 36 37 42 40 25 21 15 18 13 41 25 24 23 22 25 29 35 20 10 19 19 17 38 8 5 41 6 26 16 31 3...

Page 32: ...ECR International 2210 Dwyer Avenue Utica NY 13501 web site www ecrinternational com...

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