Olsen LRF90, LRFV90, LRF100, LRFV100, LRF65NXU Installation, Operation & Maintanance Manual

LRF

Lowboy Rear Flue Model

LRFV

Lowboy Rear Flue Model with ECM Blower

Oil Fired Warm Air Furnaces

INSTALLATION, OPER ATION &

MAINTENANCE MANUAL

ECR International

2210 Dwyer Avenue, Utica NY 13501

web site: www.ecrinternational.com

P/N 240011511, Rev. C [05/31/2017]

DIMENSIONS

F

1

4.8cm

7

"

8

H

G

B

E

D

C

A

Table 1 - Dimensions

Furnace

Model

LRF/
LRFV

WidthALengthBHeight

22" 53-½" 33-⁵/8" 20-½" x 18"

55.8 cm 135.9 cm 85.4 cm

Cabinet Plenum - Openings

C

Supply

D x E

52.1 cm x 45.7cm 52.1 cm x 47.3cm

Return

F x G

20-½" x 18-⁵/8"

2

Flue

Diameter

5" 29" 20" x 20" x 1" 240 LB

12.7 cm 73.7cm 51cm x51cm x 2.5cm 108Kg

Height

H

Filter

(Permanent)

240011511 REV. C [05/31/2017]

Shipping

Weight

1. General ............................................................................................................................... 4

2. Safety Symbols .................................................................................................................... 4

3. Introduction Models LRF/LRFV ................................................................................................ 4

4. Heat Loss ............................................................................................................................ 4

5. Locating the Unit ................................................................................................................. 5

6. Furnace Used In Conjunction With Air Conditioning .................................................................... 5

7. Air Filter .............................................................................................................................. 6

8. Ductwork ............................................................................................................................. 6

9. Combustion and Ventilation Air ............................................................................................... 6

10. Chimney Venting ................................................................................................................... 6

11. Barometric Damper Control .................................................................................................... 6

12. Optional Direct Venting .......................................................................................................... 6

13a. Fan Timer Board And Limit Control (LRF) [See Figure 2, page 15] ............................................. 6

13b. Fan Timer Board And Limit Control (LRFV) [See Figure 3, page 15] ............................................ 7

14. Electrical Connections ............................................................................................................ 7

15. Humidier ............................................................................................................................ 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. Circulating Air Blower (LRFV) ............................................................................................... 9

23. Maintenance And Service ....................................................................................................... 9

24. Operating Instructions (LRF) ..................................................................................................10

25. Operating Instructions (LRFV) ................................................................................................10

Appendix A - Checkout and Adjustments ................................................................................. 11

A.1 Oil Burner Air Adjustment ..............................................................................................13

A.2 Burner Electrodes .........................................................................................................13

A.3 Start Up ......................................................................................................................14

A.4 Final Checkout .............................................................................................................14

A.5 Blower Setup ...............................................................................................................16

Appendix B - Wiring Diagrams ................................................................................................. 18

Chimney Vent Furnace Wiring Diagram LRF/LRFV ...................................................................19

Direct Vent Furnace Wiring Diagram LRF/LRFV......................................................................20

Appendix C - Sequence of Operation and Troubleshooting ...................................................... 21

C.1 Troubleshooting ...........................................................................................................23

C.2 Preliminary Steps: ........................................................................................................23

C.3 Check Oil Primary Control ..............................................................................................23

Appendix D - Home Owners Reference Table ........................................................................... 27

Parts Listing: Chimney Vent Models LRF/LRFV ........................................................................ 28

Parts Listing: Direct Vent Models LRF/LRFV ............................................................................ 30

Parts Diagram ......................................................................................................................... 31

Check our website frequently for updates: www.ecrinternational.com

Information and specications outlined in this manual in effect at the

time of printing of this manual. Manufacturer reserves the right to

discontinue, change specications or system design at any time without

notice and without incurring any obligation, whatsoever.

3

240011511 REV. C [05/31/2017]

1. General

Furnace installation shall be completed by qualied agency. See

glossary for additional information.

WARNING

!

Fire, explosion, asphyxiation and electrical shock
hazard. Improper installation could result in death or
serious injury. Read this manual and understand all
requirements before beginning installation.

WARNING

!

Fire, burn, asphyxiation hazard. Do not use gasoline,
crank case oil, or any oil containing gasoline. Failure to
follow these instructions could result in death or serious
injury.

3. Introduction Models LRF/LRFV

Models LRF and LRFV are oil red forced air lowboy furnaces with
an output capacity range of 65,000 BTU/hr to 100,000 BTU/hr.

• LRF may be equipped with either 1/2 HP PSC 4 speed direct
drive or single speed belt drive blower motor.

• LRFV is equipped with 1/2 HP ECM variable speed blower
motor.

• Furnaces are factory equipped for chimney venting or factory
equipped for direct venting.

» Chimney vent and direct vent models are not eld

convertible.

» Supplemental direct vent installation instructions are

included with direct vent models.

Installation shall conform to requirements of authority
having jurisdiction or in absence of such requirements:

2. Safety Symbols

Become familiar with symbols identifying

potential hazards.

This is the safety alert symbol. Symbol alerts you to potential
personal injury hazards. Obey all safety messages following this
symbol to avoid possible injury or death.

!

DANGER

Indicates a hazardous situation which, if not avoided,
WILL result in death or serious injury

!

WARNING

Indicates a hazardous situation which, if not avoided,
could result in death or serious injury.

!

CAUTION

Indicates a hazardous situation which, if not avoided,
could result in minor or moderate injury.

• Canada - CAN/CSA - B139, Installation Code for Oil-Burning
Equipment.

• United States - National Electrical Code, NFPA31, Standard
for the Installation of Oil-Burning Equipment.

Models are CSA listed, (NRTL/C) for use with No. 1 (Stove)
and No. 2 (Furnace) Oil.

Refer to tables in Appendix A for performance data.

4. Heat Loss

Maximum hourly heat loss for each heated space shall be
calculated in accordance with the procedures described in the
manuals of:

• Canada - The Heating, Refrigeration and Air Conditioning
Institute 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 of America, describes a
suitable procedure for calculating maximum hourly heat loss.

NOTICE

Used to address practices not related to personal
injury.

4

240011511 REV. C [05/31/2017]

!

WARNING

Fire hazard. Do not install furnace on tiled oors or

carpeting. Failure to follow these instructions could
result in death or serious injury.

5. Locating the Unit - [See Table 2]

• Locate furnace so ue 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 oors.

• Do not install furnace on carpet or tiled oors.

Maintain all clearances to combustibles. See Table 2.

Table 2: Minimum Installation Clearances

Location

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

Clearance to Combustibles

LRF and LRFV

FIGURE 1a: Evaporator Coil

Block-Off Plates

FIGURE 1b: Evaporator Coil Centered Over
Narrow Furnace

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 specically 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 specied by coil manufacturer.

• Cased evaporator coils with cases that are slightly larger

than the furnace cabinet may be used by employing eld

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

airow.

5

240011511 REV. C [05/31/2017]

7. Air Filter

• Install properly sized air lter on return air side of unit.

• Furnace is supplied with 20" x 20" permanent air lter and

lter slot in blower compartment.

• If lter is damaged, replace with lter of same size and type.

Manufacturer recommends breech draft of -0.02 in. w.c.

Flue pipe must not pass through any oor or ceiling, may pass
through a wall where suitable re protection provisions have been

installed.

• Canada, refer to CAN/CSA B-139 for rules governing the
installation of oil burning equipment.

8. Ductwork

• Supply and return air ductwork must be designed and
installed in accordance with approved methods, local and
national codes as well as good trade practices.

• When ductwork supplies air to space other than where
furnace is located, return air must be sealed and directed to
this space.

9. Combustion and Ventilation Air

Comply with CSA B139 (Canada) or NFPA 31 (US) standards for
the Installation of Oil Burning Equipment and applicable provisions
of local building codes to provide combustion and ventilation air.

WARNING

!

Failure to provide adequate combustion and ventilation
air could result could result in death or serious injury.

WARNING

!

Asphyxiation hazard. Chimney vented versions of

furnace must be connected to ue having sufcient

draft at all times. Failure to follow these instructions
could result in death or serious injury.

• United States, refer to NFPA 31 for regulations governing the
installation of oil burning equipment.

See appendix A for burner set-up.

11. Barometric Damper Control

Barometric damper control, also known as draft regulator, is used
on conventional chimney venting only. Control automatically
maintains constant negative pressure. Ensures proper pressures

are not exceeded. If chimney does not develop sufcient draft,

draft control does not function properly.

• Install draft regulator in same room or enclosure as furnace.
Draft regulator should not interfere with combustion air
supplied to the burner.

• Locate control near furnace ue outlet.

• Install per instructions supplied with regulator.

• Set breech draft to -0.02 in. w.c.

12. Optional Direct Venting

Certain LRF/LRFV furnaces are manufactured as direct vent
units. Refer to Direct Vent Supplement Installation, Operation
and Maintenance Manual, part number 240011896, included with
direct vent furnace, for details.

Direct venting requires use of specic oil burners, Beckett NX or

Riello 40BF3 or 40BF5.

Refer to Appendix A, Tables A-2 and A-4.

NOTICE

This furnace is approved for use with Type L vent or
equivalent. Maximum vent temperature for Type L vent
is 575°F (300°C).

10. Chimney Venting

• Flue pipe should be as short as possible with horizontal pipes
sloping upward toward the chimney at a rate of one-quarter
inch per foot.

• Flue pipe should not be smaller in cross sectional area than

ue collar on the furnace.

• Flue pipe should connect to chimney so the ue pipe extends
into, and terminates ush with the inside surface of chimney

liner. Seal the joint between pipe and lining.

• Chimney outlet should be at least two feet above highest
point of peaked roof.

• All unused chimney openings should be closed.

• Chimneys must conform to local, provincial or state codes,
or in the absence of local regulations, to the requirements of
the National Building Code.

13a. Fan Timer Board And Limit Control (LRF)
[See Figure 2, page 15]

Electronic Fan Timer integrates control of burner and
circulator fan operations. Control is central wiring point 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, 90 or 120 seconds.
Provides a delay between burner ignition and blower start-up

to eliminate excessive ow of cold air when blower comes

on. Manufacturer recommended fan on delay is 30 seconds
for LRF100 models and 60 seconds for LRF65/80/90 models.

• United Technologies 1158-120 has an adjustable fan off time
of 2, 3, 4 or 6 minutes as displayed in Chart 1. Fan off delay
time starts when burner motor is de-energized at end of call
for heat. Blower shutdown is delayed to remove any residual
heat from heat exchanger. Manufacturer recommended fan
off delay is 2 minutes.

• Electronic fan timer board works in conjunction with snap
disc limit controls, performing a safety function, shutting off
burner if furnace over-heats.

6

240011511 REV. C [05/31/2017]

• Limit control is thermally operated and automatically
resets. Limit control is factory installed, pre-set and is not
adjustable.

• If limit control opens with United Technologies 1158-120
electronic fan control, circulating fan will energize. When
limit closes, fan off timer begins. At the end of fan off time
cycle burner is energized, initiating normal burner cycle.

Chart 1- United Technologies 1158-120 (LRF)

Dip Switch Position Blower Delay Times

1 2 3 4 On Seconds Off Minutes

Off Off 30
On Off 60
Off On 90
On On 120

Off Off 2
On Off 3
Off On 4
On On 6

• Accessories requiring 120 VAC power sources such as

electronic air cleaners and humidier transformers may be

powered from 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 accessories.

• Thermostat wiring connections are shown in wiring
diagrams in Appendix B. Some micro-electronic thermostats
require additional controls and wiring. Refer to thermostat
manufacturer's instructions.

• ECM Blower note - Single stage cooling use terminal Y/Y2.

Two stage cooling use terminal Y1 for rst stage and Y/Y2
for second stage. When Y1 is energized, air ow is reduced

by 20%. Do not use terminal Y1 with single stage cooling or
heat pump.

• Locate thermostat approximately 5 feet above oor, on
inside wall, and where thermostat is exposed to average
room temperatures. Avoid locations where thermostat
is exposed to cold drafts, heat from nearby lamps and
appliances, exposure to sunlight, heat from inside wall
stacks, etc.

13b. Fan Timer Board And Limit Control (LRFV)
[See Figure 3, page 14]

United Technologies 1168-1 ECM tap board has adjustable fan on/

off delay and airow settings that must be adjusted in accordance

with furnace input rating (nozzle size). Refer to Table A-10 for
ECM blower set-up.

14. Electrical Connections

• Furnace is listed by Canadian Standards Association under
NRTL (North American) Standard.

• All eld wiring shall conform to CAN/CSA C22.1 Canadian
Electrical Code, Part 1, and by local codes, where they
prevail.

• United States, wiring shall conform to National Fire
Protection Association NFPA-70, National Electrical Code, and
with local codes and regulations.

• Wire furnace to separate dedicated circuit in main electrical
panel.

• Suitably located circuit breaker can be used as service
switch, separate service switch is advisable.

• Service switch is necessary if circuit breaker is close to the
furnace, or furnace is located between circuit breaker and
entry to furnace room.

• Clearly mark service switch. Install in accessible area
between furnace and furnace room entry. Locate so as
to reduce possibility it can be mistaken as light switch or
similar device.

• Power requirement for all LRF models is: 120 VAC, 1 Ø, 60
Hz., 12A.

• Accessory equipment such as electronic air cleaners and

humidiers may be included on furnace circuit.

• Adjust thermostat heat anticipator to amperage draw of
heating control circuit as measured at "R" and "W" terminals
of thermostat. Do not measure current with thermostat
connected to the circuit. Measure amperage by connecting
ammeter between two wires which connect to thermostat
"R" and "W" terminals.

15. Humidier

• Humidier is optional accessory available through most
heating supplies outlets.

• Follow humidier manufacturer's installation instructions

• Protect furnace heat exchanger from water or water droplets

from humidier.

• Do not use direct drive motor connections as source of

power for 120 VAC humidiers and humidier transformers.

16. Piping Installation

• Install fuel system in accordance with requirements of CAN/
CSA B-139, and local regulations.

• United States installation shall conform to NFPA No. 31 and
local codes and authorities.

• Use only approved fuel oil tanks, piping, ttings and oil lter.

• Install oil lter as close to burner as possible.

• Refer to instructions and illustrations in oil burner and oil
pump instructions shipped with the furnace.

17. Oil Filter

Install oil lter between fuel oil storage tank and oil burner. When

using oil burner nozzle smaller than 0.65 U.S. Gallons Per Hour,

install additional 7 to 10 micron lter as close as possible to oil

burner.

7

240011511 REV. C [05/31/2017]

18. Oil Burner Nozzles

Furnaces are certied for multiple ring rates. Furnace may be
red at ideal rate for wide range of structures by manipulating oil

burner setup and blower settings. Refer to Table A-1 thru A-9, and
furnace rating plate to determine proper combinations. Nozzles for

alternate ring rates are included with furnace.

WARNING

!

Fire, burn, asphyxiation hazard. Do not start the
burner unless blower access door is secured in place.
Failure to follow these instructions could result in death
or serious injury.

19. Oil Burner Adjustment

• Adjust burner air supply to maintain fuel to air ratio to obtain
ideal combustion conditions.

• Lack of air causes "soft" and "sooty" ames, resulting in soot
build-up throughout heat exchanger passages.

• Excess combustion air causes bright roaring re and high

stack temperatures resulting in poor fuel efciency.

• LRF and LRFV operate most efciently with No. 1 smoke
spot on Bacharach Scale. Dust will eventually build up on
air moving components of oil burner assembly resulting in

decreased air supply with potential soot build up in ue gas

passageways of heat exchanger. Soot behaves as insulator
and impairs good heat transfer. Stack temperature increases,

and efciency decreases. To avoid this problem, adjust the air

supply as follows:

» Chimney vented units - adjust air supply to provide no

more than a trace smoke spot on the Bacharach scale.

» Direct vented units - adjust air supply for zero smoke per

the Direct Vent Supplement Installation, Operation and
Maintenance Manual included with direct vent furnace.

20. Burner Electrodes

Correct positioning of electrode tips with respect to each other,
fuel oil nozzle, and burners is essential for smooth light ups and
proper operation.

Refer to oil burner instructions provided with furnace and

Appendix A Section A.2 in this manual for electrode specications.

NOTICE

Do not tamper with furnace controls they are sensitive.
If problems persist, call your service contractor.

21. Burner Primary (Safety) Control

Furnace is equipped with primary combustion control, also
referred to as burner relay or burner protector relay, which uses
a cad cell located in burner housing, to monitor and control
combustion.

Dust or combustion residuals can build up on lens of cad cell

impairing its response to ame. Check cad cell for cleanliness

and proper alignment if primary control frequently shuts down
combustion.

22a. CIRCULATING AIR BLOWER (LRF/LRFV)

• LRF furnace models may be equipped with either direct
drive or belt drive blower systems.

• LRFV furnace models are equipped with direct drive blower
systems.

• LRF models are equipped with PSC motors.

• LRFV models are equipped with electronically commutated
motors (ECM).

Direct Drive Blower Systems

• Direct drive blower speed adjustments are not normally
required in properly sized extended plenum duct systems.
Motor RPM and air CFM delivery will vary automatically to
accommodate conditions within usual range of external
static pressures typical of residential duct systems.

• Under-sized duct systems may require higher blower speed
to obtain system temperature rise.

• Some older duct systems were not designed to provide
static pressure. They typically feature special reducing

ttings at each branch run and lack block ends on the trunk
ducts. These systems may require modication to provide
some resistance to the airow to prevent over-amping of

direct drive blower motor. Selecting a lower blower speed
may correct this problem.

• Direct drive blower speeds are adjusted by changing
"hot" wires to motor winding connections. Refer to wiring

diagrams in Appendix B or wiring diagram label afxed to

furnace.

• Do not move neutral wire (normally white wire) to
adjust blower speed.

• Single blower speed for both heating and cooling modes
may be used. Use a "piggy-back connector" accommodating
both wires on a single motor tap.

• It is also acceptable to connect selected motor speed with a
pigtail joined to both heating and cooling speed wires with
a wire nut.

• Safety precaution against accidental disconnection of wires
by vibration, secure wire nut and wires with few wraps of
electricians tape.

• Do not connect power leads between motor speeds.
Always connect neutral wire to motor's designated
neutral terminal.

• If joining blower speed wiring is done in furnace junction
box, tape off both ends of unused wire.

• Do not use blower speed wires as source of power to

accessories as electronic air cleaners and humidier

transformers. Unused motor taps auto-generate

sufciently high voltages to damage accessory

equipment.

8

240011511 REV. C [05/31/2017]

Belt Drive Blower Systems

WARNING

!

Improper installation could result in death or serious
injury. Belt drive components operate at high speeds
and may snag loose clothing resulting in injury or
death. Have a trained service professional preform
the following instructions. Failure to follow these
instructions could result in death or serious injury.

!

WARNING

Electrical shock hazard. Turn OFF electrical power
supply at service panel before opening blower access
door. Failure to do so could result in death or serious
injury.

22b. Circulating Air Blower (LRFV)

LRFV furnace models are equipped with electronically commutated
motors (ECM).

Belt drive blower systems can be modied for speed and air deliv­ery by adjusting variable speed motor pulley and changing blower
pulley.

• Adjust variable speed motor pulley by loosening 5/32 Allen
set screw in outer sheave. Turn outer sheave clockwise to
increase blower speed, counter clockwise to reduce speed.

• Verify setscrew is tightened at one of the at spots, failure

to do so will convert the variable speed pulley to a xed

speed pulley by ruining the threads.

• Modify blower speed by changing the blower pulley. Smaller
blower pulley will cause the blower to turn faster. Large
pulley reduces blower speed.

• Large increases in the blower speed may increase power
requirements.

• Check amperage draw of the blower motor after making
changes. If amperage draw is greater than the value listed
on the motor rating plate, replace with motor of higher
horsepower.

• Deection of 3/4 of an inch to 1 inch fan belt tension is

necessary. Less deection places a strain on the blower

bearings and increases start up amperage draw.

• More deection allows excess slippage and causes
premature motor pulley wear.

• Automotive belt dressings are not recommended.

• Bar soap will work as belt dressing to reduce belt squeaks,
etc. If using soap apply to the sides of belt only.

If operating belt drive blower at speeds above 1100 RPM, replace
sintered bronze blower bearings with roller bearings.

Setting Blower Speed and “ON” and “OFF” Timings

Blower speed and on/off time delays are handled by ECM motor
programming and are set via dipswitches per Table A-10.

Heating airow rate is SW1 and on/off delay is SW4, both are set
according to ring rate. Cooling airow rate is SW2 and if used

is set according to installed cooling capacity. SW3 can be used

to adjust airow rate by (+) or (-) 15%. Features of this ECM
variable speed motor are that it will deliver a constant airow

within a wide range of external static pressures, and also includes:

• Soft Start: ECM will slowly ramp up to required operating
speed. In heating cycle allows heat exchanger to reach
operating temperature before set heat speed, minimizes
noise and increases comfort.

• Soft Stop: At end of heating cycle, ECM will slowly ramp

down. Allows increased energy efciency and reduced noise

levels.

• Dehumidication: Feature is programmed into the variable
speed motor. At start of each cooling cycle, variable speed

motor will run at 82% of rated airow for 7.5 minutes. After

7.5 minutes has elapsed, motor will increase to 100% of

rated airow. Used to provide dehumidication and improve
system efciency.

• Continuous Fan Operation: When thermostat continuous
fan (G) switch is on without call for heating or cooling,
indoor fan is immediately energized at 50% of cooling speed.
Allows continuous circulation of air between calls for heating
or cooling. If call for heat (W) or cool (Y) occurs during
continuous fan, blower remains energized.

23. Maintenance And Service

Routine Maintenance By Home Owner

• Arrange for professional servicing of furnace by the service
or installation contractor annually.

• Homeowner is to maintain air lter or lters. A dirty lter
can cause furnace to over-heat, fail to maintain indoor
temperature during cold weather, increase fuel consumption
and cause component failure.

• Inspect, clean or replace lter monthly.

• Furnace is supplied with semi-permanent type lter. If lter

is damaged, replace with lters of same size and type.

• During monthly lter inspection, inspect general condition of
furnace. Watch for signs of oil leaks in vicinity of oil burner,
soot forming on any external part of furnace, soot forming
around joints in vent pipe, etc. If any of these conditions are
present, please advise your service or installation contractor.

9

240011511 REV. C [05/31/2017]

Annual Service By Contractor

• Inspect heat exchanger periodically and clean if necessary.

!

WARNING

Electrical shock hazard. Turn OFF electrical power
supply at service panel before service or maintenance
Failure to do so could result in death or serious injury.

• If cleaning is necessary, shut off oil supply, shut off power to
the furnace and remove burner.

• Remove cleanout cover and turbulators.

• Wire brush can be used to loosen dirt and debris on the
inside surfaces of heat exchanger. Clean out all accumulated
dirt, soot and debris with a wire handled brush and industrial
vacuum cleaner.

• Clean and reinstall turbulators.

• Before replacing cleanout cover, inspect gaskets. If gasket
is broken, remove remnants and replace with new gaskets.
Replace cleanout cover.

• Blower motor is factory oiled and permanently sealed. Do
not lubricate. Excess oil causes premature electric motor
failure.

• Inspect blower fan. Clean if necessary.

• Oil Burner Maintenance: Follow oil burner manufacturer
instructions.

• Change oil burner nozzle and oil lter annually.

• Clean and inspect venting system for signs of deterioration
and leakage. Replace pitted or perforated vent pipe and

ttings.

• Barometric damper should open and close freely.

• Check electrical connections to ensure tight connections.
Safety controls such as the high limit controls should be
tested for functionality.

• Check fan control to ensure fan on and off delay function
continues to start and stop blower fan at optimal settings.

• Check operation of limit switch.

24. Operating Instructions (LRF)

Before Lighting

1.

Open all supply and return air registers and grilles.

WARNING

!

Fire, burn, explosion, asphyxiation hazard.

• Do not start burner when excess oil has
accumulated, furnace is full of vapor, or combustion
chamber is very hot.

• Do not burn garbage or paper in furnace.

• Do not leave paper or rags around furnace.

Failure to follow these instructions could result in death
or serious injury.

2.

Open all valves in oil pipes.

3.

Turn on electric power supply

To Light Unit

1.

Set thermostat above room temperature to call 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 1158-120 has adjustable fan
on time set by selecting dipswitch combination displayed
in Chart 1. Fan on delay can be set at 30, 60, 90 or 120
seconds. Manufacturer recommended fan on delay is 30
seconds for LRF100 models and 60 seconds for LRF65/80/90
models.

3.

Set thermostat below room temperature. Oil burner stops.

4.

Air circulation blower continues to operate until time off
setting selected on electronic fan timer control times out.
United Technologies 1158-120 has adjustable fan off time
of 2, 3, 4 or 6 minutes. Manufacturer recommended fan
off delay is 2 minutes for all models. Fan timer control
adjustments may be altered if air at room registers is high
upon blower start up or shutdown.

5.

Restore thermostat setting to comfortable temperature.

NOTICE

If furnace is to be shut down for extended period of
time, close oil supply valve to burner.

To Shut Down Unit

1.

Set thermostat to lowest possible setting.

2.

Set manual switch (if installed) in electrical power supply line
to "OFF".

25. Operating Instructions (LRFV)

Before Lighting

1.

Open all supply and return air registers and grilles.

2.

Open all valves in oil pipes.

3.

Turn on electric power supply.

To Light Unit

1.

Set thermostat above room temperature to call 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 1168-1 has adjustable fan
on/off time delay programmed into ECM motor, and is set
by selecting SW4 DIP switch combination displayed in Table
A-10. Adjust Fan on/off delay according to input (nozzle
size).

3.

Set thermostat below room temperature. Oil burner stops.

4.

Air circulation blower continues to operate until blower off
delay setting programmed into ECM motor times out.

5.

Restore thermostat setting to comfortable temperature.

If furnace is to be shut down for extended period of
time, close oil supply valve to burner.

To Shut Down Unit

1.

Set thermostat to lowest possible setting.

2.

Set manual switch (if installed) in electrical power supply line
to "OFF".

10

NOTICE

240011511 REV. C [05/31/2017]

APPENDIX A - CHECK OUT AND ADJUSTMENTS

Check out and adjustments

LRF and LRFV furnaces may be used with following oil burners.

Beckett AFG and Riello 40F3 and Carlin EZ-LF oil burners are for chimney vent applications using indoor air for combustion only.

Beckett NX and Reillo 40BF3/40BF5 oil burners are for direct vent applications using outdoor air for combustion only.

Settings shown below are for initial startup only. Final adjustments shall be made using combustion test instructions

Table A-1 Beckett AFG Oil Burner Set-Up

Beckett AFG Series Oil Burners

(For use with chimney vented units only)

Furnace

Model

Output

BTU/Hr

Burner Model

Delavan

Nozzle

Pump

Pressure

[PSIG]

Flow Rate

[USGPH]

Head

Air

Setting

LRF65

66,000 AFG70MPSS 0.50 / 45°W 140 0.55 L2 4

LRFV65

LRF80

78,000 AFG70MPSS 0.50 / 45°W 175 0.65 L2 5

LRFV80

LRF90

89,000 AFG70MPSS 0.60 / 60°W 175 0.75 L2 7

LRFV90

LRF100

100,000 AFG70MPSS 0.65 / 60°W 175 0.85 L2 8

LRFV100

Table A-2 Beckett NX Oil Burner Setup

.

Beckett NX Series Oil Burners

(For use with direct vent units using outdoor combustion air only)

Furnace Model

Output

BTU/Hr

Burner

Model

Delavan

Nozzle

Pump

Pressure

[PSIG]

Flow Rate

[USGPH]

Low Firing

Rate Bafe

LRF65NXU

65,000 NX56LQ 0.50 / 60°W 140 0.55 Yes 3

LRFV65NXU

LRF80NXU

76,000 NX56LQ 0.50 / 60°W 175 0.65 Yes 3.25

LRFV80NXU

LRF90NXU

87,000 NX56LQ 0.60 / 60°W 175 0.75 No* 3.25

LRFV90NXU

LRF100NXU

98,000 NX56LQ 0.65 / 60°W 175 0.85 No* 3.75

LRFV100NXU

* Burner is factory equipped with low ring rate bafe. Remove for 0.75 and 0.85 USGPH ring rates.

Air

Setting

11

240011511 REV. C [05/31/2017]

APPENDIX A - CHECK OUT AND ADJUSTMENTS

Table A-3 Riello 40F3 Burner Set-Up

Riello 40F3 Series Oil Burners

(For use with chimney vented units only)

Furnace

Model

LRF65RF

Output

BTU/Hr

Burner

Model

40F3

66,000

LRFV65RF

LRF80RF

VSBT

40F3

77,000

LRFV80RF

LRF90RF

VSBT

40F3

88,000

LRFV90RF

LRF100RF

VSBT

40F3

99,000

LRFV100RF

VSBT

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
BTU/Hr

Burner

Model

Delavan

Nozzle

Pump

Pressure

[PSIG]

Flow Rate

[USGPH]

Head

Setting

Air

Setting

0.50 / 90°B 125 0.55 0 1.6

0.55 / 80°B 140 0.65 0 2.1

0.65 / 80°B 133 0.75 1 2.5

0.75 / 80°B 128 0.85 2 3

Delavan

Nozzle

Pump

Pressure

[PSIG]

Flow Rate

[USGPH]

Turbulator

Setting

Air

Setting

LRF65RBU

65,000 40BF3 0.50 / 90°B 125 0.55 0.0 4.25

LRFV65RBU

LRF80RBU

76,000 40BF3 0.55 / 80°B 140 0.65 1.0 5.25

LRFV80RBU

LRF90RBU

87,000 40BF5 0.65 / 80°B 140 0.75 0.0 3.75

LRFV90RBU

LRF100RBU

98,000 40BF5 0.75 / 80°B 130 0.85 0.0 4.25

LRFV100RBU

Note: Riello 40BF3 burner is required for 0.55 and 0.65 USGPH ring rates. Riello 40BF5 burner is required for 0.75
and 0.85 USGPH ring rates.

12

240011511 REV. C [05/31/2017]

APPENDIX A - CHECK OUT AND ADJUSTMENTS

Table A-5 Carlin EZ-LF Oil Burner Set-Up

Carlin EZ-LF Series Oil Burners

(For use with chimney vented units only)

Furnace

Model

Output

BTU/Hr

Burner

Model

Delavan

Nozzle

Pump

Pressure

[PSIG]

LRF65C

66,000 EZ-LF 0.50 / 70°B 125 0.55

LRFV65C

LRF80C

78,000 EZ-LF 0.50 / 70°B 170 0.65

LRFV80C

LRF90C

89,000 EZ-LF 0.65 / 70°B 135 0.75

LRFV90C

LRF100C

100,000 EZ-LF 0.65 / 70°B 170 0.85

LRFV100C

* Burner is factory equipped with single slot air band. Replace with furnished two slot air band for 0.75 and 0.85 USGPH
ring rates.

A.1 Oil Burner Air Adjustment

Consult oil burner instructions provided in furnace documents

envelope for specic information concerning burner adjustments,

operation and troubleshooting.

Beckett AFG Burner (Chimney Vent)

Adjust air band by loosening locking screw. Re-tighten locking
screw after each adjustment. Locking screw must be tight when

taking combustion readings, as airow changes when screw is

loosened.

A.2 Burner Electrodes

Adjustment of electrode tips with respect to each other, nozzle,
burner head is very important to ensure smooth start-ups and to

permit efcient combustion.

Beckett AFG

• Electrode gap: 5/32 inch.

• Distance above horizontal center-line: 1/4 inch.

• Distance ahead of nozzle: 1/8 inch.

Flow
Rate

[USGPH]

Air

Band

Single

Slot

Single

Slot

Two

Slot*

Two

Slot*

Head Bar

Setting

0.60 / 0.65 35%

0.60 / 0.65 65%

0.75 45%

0.85 / 1.00 45%

Air

Beckett NX Burner (Direct Vent)

Loosen splined nut on nozzle line one turn. Turn adjustment
screw clockwise to increase air and counter clockwise to decrease
air. Tighten splined nut after obtaining proper setting.

Riello 40F3 Burner (Chimney Vent)

Combustion air is adjusted by removing burner cover. Loosen
screws that secure air adjustment plate. Move adjusting plate
to either increase or decrease combustion air. When proper air

setting is achieved, re-tighten xing screws. Re-install cover.

Riello 40BF Burner (Direct Vent)

Combustion air can be adjusted with burner cover on. Remove
plastic cover on top right hand side of burner cover. With Phillips
screwdriver turn adjusting screw clockwise to increase air and
counter clockwise to decrease air. When combustion air is set,
reinsert plastic cover.

Carlin EZ-LF (Chimney Vent)

Adjust air band by loosening locking screw. Re-tighten locking
screw after adjustment.

• “Z” dimension, distance from front of end cone (head) to

Beckett NX

• Electrode gap: 5/32 inch.

• Distance above horizontal center-line: 1/4 inch.

• Distance ahead of nozzle: 3/32 inch.

• Check/adjust zero calibration per Beckett NX oil burner

Riello Burners

• Electrode gap: 5/32 inch.

• Distance 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 of nozzle: Flush to 1/16 inch.

13

face of nozzle should be 1-3/4 inch.

manual supplied with furnace.

240011511 REV. C [05/31/2017]

APPENDIX A - CHECK OUT AND ADJUSTMENTS

A.3 Start Up

Use following instructions to set the burner:

1.

Shut off electrical power to the furnace.

2.

Install oil pressure gauge to pressure port on oil pump.

(Refer to oil pump specication sheet included with burner

instructions).

3.

Restore electrical power to furnace.

4.

Start furnace and bleed all air from fuel oil lines.

5.

Close purge valve and re the unit.

6.

Allow furnace to warm up to normal operating temperatures.
During this time, set pump pressure in accordance with data
provided in Appendix A, Table A-1 thru A-3.

7.

Chimney vented units - Drill 1/4" test port in venting

between furnace ue outlet and draft regulator (barometric

damper) to take smoke readings.

8.

Direct vented units - Do not drill. Use test port in furnished
appliance connector to take smoke readings.

9.

When furnace has reached "steady state" (after
approximately 10 minutes), set combustion air damper to get
TRACE of smoke for chimney vented units.

10.

Check system temperature rise. Temperature rise is the
difference between return air temperature measured at
a point near return air inlet, and supply air temperature
measured near furnace outlet.

System temperature rise is listed on furnace rating plate. If

temperature rise is too high, airow must be increased. If

temperature rise is too low, slow fan down.

11.

Chimney vented units - after air adjustments have been
completed, recheck the breech draft. Breech draft should be
adjusted to -0.02 inches w.c.

12.

Turn burner off. Observe duct thermometer in supply air
stream, note temperature blower fan stops. Fan adjustments
can be made by moving dipswitch settings on timer control
board for fan off delay.

14.

Set heat anticipator adjustment in thermostat (if so
equipped), by removing "R" or "W" wire to thermostat. Read

amperage draw between the two wires. Failure to remove one
of the wires from thermostat while performing this test could
burn out heat anticipator. Set heat anticipator to amperage
measured.

15.

Direct vented units - Check all joints in positive pressure
venting system for leaks before leaving site.

16.

Run furnace through at least three full cycles before leaving
installation, to ensure all controls are operating properly.

A.4 Final Check Out

Verify all safety devices and electrical components have been set
for normal operation.

Verify all electrical connections are tight and wiring is secure.

Verify homeowner is informed and understands:

• Where circuit breaker or fuse is located in main electrical
panel.

• Where furnace switch is located, and switch "on" and "off"
positions if not obvious.

• Where oil shut-off valve from oil storage tank is located.

• Thermostat operation, and other related accessories.

• How to operate manual reset button on primary control, and
when not to push the reset button.

• How and where to visually inspect venting system for leaks or
other problems.

• How to inspect, clean and replace air lter, and other
homeowner maintenance procedures.

• Who to call for emergency service and routine annual service.

13.

Check operation of limit switch.
A. Shut off power to furnace.

B. Temporarily remove neutral wire from PSC blower motor

or from neutral terminal on fan timer control, or remove
5 pin power connector from ECM 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. After two or three minutes of burner operation, limit

control should turn burner off.
F. When limit function test is complete, shut off electrical

power to furnace, replace neutral wire or 5 pin power

connector. Restore power.
G. Blower fan will start up immediately. Once temperature

has dropped and limit control has reset, fan will operate

until fan off time is reached.
H. Oil burner will resume operation and continue until

thermostat is satised.

I. Restore thermostat setting to comfortable temperature.

14

240011511 REV. C [05/31/2017]

APPENDIX A - CHECK OUT AND ADJUSTMENTS

FIGURE 2: UNITED TECHNOLOGIES 1158-120 FAN TIMER BOARD (LRF)

FIGURE 3: UNITED TECHNOLOGIES 1168-1 ECM TAP BOARD (LRFV)

15

240011511 REV. C [05/31/2017]

APPENDIX A - CHECK OUT AND ADJUSTMENTS

A.5 Blower Setup

Table A-6 Direct Drive Blower Motor Setup - 1/2 HP PSC 4 Speed Motor

Heating Blower Set-Up Cooling Capacity

0.20 in. w.c. 0.50 in. w.c.

Speed Speed

∆T Speed

0.20 0.30 0.40 0.50 0.60

High 1455 1383 1314 1249 1160

Med-High 1427 1345 1286 1216 1128

Med-Low 1234 1170 1135 1054 973

Low 827 819 805 766 709

Furnace

Model

LRF

65 – 100

Furnace

Model

LRF65 100-10T DD Low Low 3 766-1249

LRF80 100-10T DD Low Medium Low 3 766-1249
LRF90 100-10T DD Medium Low Medium High 3 766-1249

LRF100 100-10T DD Medium High High 3 766-1249

Blower

Table A-7 Direct Drive Blower Characteristics - 1/2 HP PSC 4 Speed Motor

Blower

100-10T DD 6.0 55-85 °F

Motor

FLA

Tons

CFM

External Static Pressure – Inches w.c.

CFM Range

@ 0.5 in. w.c.

Table A-8 Belt Drive Blower Motor Setup - 1/2 HP PSC Single Speed Motor

Heating Blower Set-Up Cooling Capacity

Furnace

Model

LRF65 100-10T 3-1/4" X 1/2" 3 T.O.
LRF80 100-10T 3-1/4" X 1/2" 2 T.O.
LRF90 100-10T 3-1/4" X 1/2" 1 T.O.

LRF100 100-10T 3-1/4" X 1/2" 0 T.O.

Blower

Motor Blower

0.20 in. w.c. 0.2 in. w.c.

Pulley

6" X 3/4" 4L370 2.5-3.0 960-1300

Table A-9 Belt Direct Drive Blower Characteristics - 1/2 HP PSC Single Speed Motor

Furnace

Model

LRF65
LRF80 1 1307 1190 1061 915 752

LRF90 2 1217 1076 927 744 544

LRF100 3 1110 960 793 536 248

Motor

FLA

7.9 55-85 °F 100-10T

∆T Blower

Motor

Pulley

Turns Out

0 1400 1300 1183 1052 904

External Static Pressure – Inches w.c.

0.1 0.2 0.3 0.4 0.5

Belt Tons CFM Range

CFM

TIP

Formulas will assist with design of duct-work and determination of air ow delivery.

CFM = Bonnet Output / (1.085 x System Temperature Rise (∆T)
System Temperature Rise (∆T) = Bonnet Output / (1.085 x CFM)

16

240011511 REV. C [05/31/2017]

APPENDIX A - CHECK OUT AND ADJUSTMENTS

Table A-10 Direct Drive Blower Motor Setup - 1/2 HP ECM Variable Speed Constant CFM Motor

Dip Switch Adjustment Chart

For Input 0.55 USGPH TO 0.85 USGPH

SW1 - HEAT

DIP Switch

Position

1 2 USGPH 1 2 (TON)

OFF OFF A 0.65

ON OFF B 0.85

OFF ON C 0.75

ON ON D 0.55

SW3 - ADJUST

DIP Switch

Position

1 2

OFF OFF A 0% OFF OFF A 0.65

ON OFF B (+)15% ON OFF B 0.85

OFF ON C (-)15% OFF ON C 0.75

ON ON D N/A ON ON D 0.55

POS.

POS.

INPUT

CFM

1 2 USGPH

SW2 - COOL

DIP Switch

Position

OFF OFF A 3.5

ON OFF B 3.0

OFF ON C 2.5

ON ON D 2.0

SW4 - DELAY

DIP Switch

Position

POS.

POS.

AC Size

INPUT

NOTE:

SW1 (HEAT) AND SW4 (DELAY) DIP SWITCHES MUST BOTH BE ADJUSTED ACCORDING TO INPUT (FIRING RATE).

SW2 (COOL): 1 TON is approximately equal to 400 CFM

SW3 (ADJUST)

Increase OR decrease CFM respectively

Table A-11 Direct Drive Blower Characteristics - 1/2 HP ECM Variable Speed Constant CFM Motor

Furnace Model Blower Motor HP Motor FLA ∆T

LRFV 65 – 100

SW1 HEAT

DIP SWITCH POSITION

A (1=OFF, 2=OFF) 0.65 1016 1168 864

B (1=ON, 2=OFF)

C (1=OFF, 2=ON)

D (1=ON, 2=ON)

SW2 COOL

DIP SWITCH POSITION

A (1=OFF, 2=OFF) 3.5 700 805 595

B (1=ON, 2=OFF)

C (1=OFF, 2=ON)

D (1=ON, 2=ON)

100-10T DD 1/2 HP ECM 7.7 55-85 °F

OIL HEATING

INPUT

[USGPH]

0.85 1430 1600 1216

0.75 1229 1413 1045

0.55 828 952 704

AC SIZE

[TONS]

3.0 600 690 510

2.5 500 575 425

2.0 400 460 340

CFM WITH SW3-ADJ

DIP SWITCH POSITION A

CONTINUOUS FAN

CFM WITH SW3-ADJ

DIP SWITCH POSITION A

CFM WITH SW3-ADJ

DIP SWITCH POSITION B

CFM WITH SW3-ADJ

DIP SWITCH POSITION B

DIP SWITCH POSITION C

DIP SWITCH POSITION C

CFM WITH SW3-ADJ

CFM WITH SW3-ADJ

17

240011511 REV. C [05/31/2017]

APPENDIX A - CHECK OUT AND ADJUSTMENTS

Table A-11 Direct Drive Blower Characteristics - 1/2 HP ECM Variable Speed Constant CFM Motor - continued

COOLING OR HEAT PUMP HEATING

SW2 COOL

DIP SWITCH POSITION

A (1=OFF, 2=OFF) 3.5 1400 1600 1190

B (1=ON, 2=OFF)

C (1=OFF, 2=ON)

D (1=ON, 2=ON)

The CFM's shown are reduced by 20% if 24 VAC input is to Y1 (slow speed of 2 speed compressor) instead of Y/Y2

SW4 DELAY

DIP SWITCH POSITION

A (1=OFF, 2=OFF) 0.65 60 SECONDS - 0% 60 SECONDS - 63% 2 MINUTES - 75%

B (1=ON, 2=OFF)

C (1=OFF, 2=ON)

D (1=ON, 2=ON)

AC SIZE

[TONS]

3.0 1200 1380 1020

2.5 1000 1150 850

2.0 800 920 680

INPUT

[USGPH]

0.85 30 SECONDS - 0% 60 SECONDS - 63% 2 MINUTES - 88%

0.75 60 SECONDS - 0% 60 SECONDS - 88% 2 MINUTES - 82%

0.55 60 SECONDS - 0% 60 SECONDS - 50 % 2 MINUTES - 69%

CFM WITH SW3-ADJ

DIP SWITCH POSITION A

DELAY PROFILE FOR OIL HEATING

PRE RUN ON DELAY

TIME - CFM LEVEL

CFM WITH SW3-ADJ

DIP SWITCH POSITION B

SHORT RUN ON DELAY

TIME - CFM LEVEL

CFM WITH SW3-ADJ

DIP SWITCH POSITION C

OFF DELAY

TIME - CFM LEVEL

NO ADJUSTMENT

REQUIRED

N/A

DELAY PROFILE FOR COOLING OR HEAT PUMP HEATING

AC SIZE

[TONS]

ALL 7.5 MINUTES - 82% NONE NONE

PRE RUN ON DELAY

TIME - CFM LEVEL

SHORT RUN ON DELAY

TIME - CFM LEVEL

OFF DELAY

TIME - CFM LEVEL

18

240011511 REV. C [05/31/2017]

APPENDIX B - WIRING DIAGRAMS

Chimney Vent Furnace Wiring Diagram LRF/LRFV

19

240011511 REV. C [05/31/2017]

APPENDIX B - WIRING DIAGRAMS

Direct Vent Furnace Wiring Diagram LRF/LRFV

20

240011511 REV. C [05/31/2017]

APPENDIX C - SEQUENCE OF OPERATION AND TROUBLESHOOTING

Table C-1: 1158-120 Electronic Fan Timer Board (EFT) Detailed Sequence Of Operation (LRF)

Mode Action System Response

EFT closes the oil primary control T - T connections.

Ignition system and the oil primary control start the furnace. Oil ows as long as the oil
primary control senses ame.

Burner motor is energized and heat "fan on" delay timing begins. When timing is complete,
the circulator fan is energized at heat speed.
The oil primary control is de-energized, terminating the burner cycle.

Heat "fan off" delay timing begins. Length of delay depends on EFT dipswitch settings.
When timing is complete, the circulator fan is de-energized.

EFT returns to standby mode, (Oil primary control and circulator fan are off, unless
continuous fan operation is selected at the thermostat).

Oil primary control locks out within lockout timing, (15 seconds).
Burner motor is de-energized. (Even though thermostat is still calling for heat).
If circulator fan has started, it continues through the selected heat “fan off” delay period.

Burner motor is de-energized and oil primary control goes into recycle mode.
If the selected heat “fan off” delay timing is longer than the recycle delay timing, the

circulator fan continues to run through the next trial for ignition.

Cooling contactor is energized immediately.
Circulator fan is energized at cool speed.

Cooling contactor is de-energized immediately.
Circulator fan turns off immediately.

HEAT

COOL

Thermostat calls for heat. ("W"
terminal is energized).

Thermostat ends call for heat.
("W" terminal is de-energized).

Burner fails to light.

Established ame fails.

Thermostat begins call for
cool. (G and Y terminals are
energized).

Thermostat ends call for cool.
(G and Y terminals are de­energized).

FAN

LIMIT

FAN

EAC

Thermostat begins call for fan.
(G terminal is energized).

Thermostat ends call for fan.
(G terminal is de-energized).

Limit switch string opens.

Limit switch string closes (with
existing call for heat).

Limit switch string closes
(without existing call for heat).

Continuous circulating fan is
connected.

Electronic Air Cleaner is
connected.

Circulator fan is energized immediately at cooling speed.

Circulator fan is de-energized immediately.

Oil primary control shuts off burner.
Circulator fan is energized immediately at heat speed.
EFT opens the oil primary control T - T connections. Circulating fan runs as long as limit

string stays open.
If there is a call for cooling or fan, the circulating fan switches from heating to cooling

speed.
EFT begins heat “fan off” delay sequence.

Circulating fan turns off after the selected heat “fan off” timing.
EFT re-closes the oil primary control T - T connections.
Oil primary control is energized, initiating burner light off.

Circulator fan turns off when heat “fan off” delay time is complete.
Normal operation resumes; EFT control is in standby mode awaiting next thermostat

command.

Circulating fan is energized when there is no call for heat, cool, or fan.
If fan operation is required by a call for heat, cool, or fan, the EFT switches off the

continuous fan speed tap before energizing the other fan speed.

Electronic air cleaner (EAC) connections are energized when the heat or cool speed of
the circulator fan is energized. EAC connections are not energized when the optional
continuous fan terminal is energized.

21

240011511 REV. C [05/31/2017]

APPENDIX C - SEQUENCE OF OPERATION AND TROUBLESHOOTING

Table C-2: 1168-1 ECM Tap Board Sequence of Operation (LRFV)

Thermostat Input LEDs (LED 1-5, LED 8)

Six green LEDs are placed behind their respective thermostat connections (Y1, Y/Y2, G, DH, O, W) and

illuminate whenever a call is present.

HLRF Humidity control is connected. Humidier connections are energized when the oil burner motor is energized.

Mode Action System Response

The 24 VAC input signal is passed to pin 2 of P1 and will drive the K1 relay that provides

HEAT Thermostat call for heat "W"

Thermostat calls for single
stage cooling or second stage

COOL

FAN Thermostat calls for fan "G"

DEHUMID

REVERSING
VALVE

of two stage cooling "Y/Y2"

Thermostat calls for rst stage

of two stage cooling "Y1" while
"Y/Y2" is not calling

Thermostat calls for

Dehumidication "DH"

Thermostat calls for reversing
valve "O"

dedicated contacts to the T-T input of the oil primary control. Blower runs on heating speed

prole.

The 24 VAC input signal is passed to pin 14 of P1. Blower runs on cooling speed prole.

The 24 VAC input signal is passed to pin 6 of P1. Blower runs at 80% of cooling speed

prole.

The 24 VAC input signal is passed to pin 15 of P1. Blower runs at continuous low speed

prole which is 50% of cooling speed.

The 24 VAC input signal is passed to pin 10 of P1. Blower runs according to "Y1" and
"Y/Y2" calls as noted above.

The 24 VAC input signal is passed to pin 9 of P1. Blower runs according to "Y1" and
"Y/Y2" calls as noted above.

22

240011511 REV. C [05/31/2017]

APPENDIX C - SEQUENCE OF OPERATION AND TROUBLESHOOTING

C.1 Troubleshooting

!

WARNING

Electrical shock hazard. Only a trained, experienced
service technician should perform troubleshooting
procedure. Failure to do so could result in death or
serious injury.

C.2 Preliminary Steps:

Consult Beckett or Riello instruction manuals provided with oil

burner for specic information regarding oil burner primary control

sequence of operation, diagnostics and troubleshooting.

Check diagnostic light for indications of burner condition.

NOTICE

When simulating call for heat at oil primary control,
disconnect at least one thermostat lead wire from T - T
terminals to prevent damage to thermostat. Neglecting
this procedure may 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 replace controls as necessary:

• Check power supply, fuse box or breaker, any service
switches, all wiring connections, and burner motor reset
button (if equipped).

• Check limit switches to ensure switch contacts are closed.

• Check electrode gap and position.

• Check contacts between oil primary control and electrodes.

• Check oil supply (tank gauge).

• Check oil nozzle, oil lter, and oil valves.

• Check piping or tubing to oil tank.

• Check oil pump pressure.

C.3 Check Oil Primary Control

If the trouble does not appear to be in the burner or ignition
hardware, check the oil primary control per manufacturer's
instructions included with oil burner.

23

240011511 REV. C [05/31/2017]

APPENDIX C - SEQUENCE OF OPERATION AND TROUBLESHOOTING

!

WARNING

Electrical shock hazard. Only a trained, experienced
service technician should perform troubleshooting
procedure. Failure to do so could result in death or
serious injury.

Table C-3 - System and General Troubleshooting

Problem Possible Cause Remedy

Furnace will not start.

Thermostat not calling for heat

No power to furnace

Thermostat faulty

Oil primary control faulty

Photo Cell wiring shorted or
room light leaking into photo
cell compartment

Open safety switch

No fuel oil

Check thermostat and adjust.
Check thermostat for accuracy; if mercury switch type, it might be off level.

Check furnace switch, main electrical panel furnace fuse or circuit breaker.
Look for any other hand operated switch, such as old poorly located furnace

switch, which was not removed during furnace replacement.

Remove thermostat wires from oil primary control terminals T-T. Place a
jumper across T-T. If furnace starts, replace thermostat, thermostat sub-base
(if equipped), or both.

Check reset button on oil primary control.
Remove thermostat wires from oil primary control terminals T - T.
Check for 24V across T -T. If no voltage is present, check for 115V to oil

primary control.
If 115V is present, refer to oil primary control documentation provided with

oil burner.

Check photo cell (cad cell) wiring for short circuits.
Check for room light leaking into cad cell compartment. Repair light leak if

necessary.

Check for open limit or auxiliary limit.
Check internal wiring connections; loose connectors, etc.

Check fuel oil supply.
Check all hand operated fuel oil valves are in open position. Fill oil storage

tank if necessary.

Clogged nozzle

Furnace will not start

without rst pushing oil

primary control reset

button.

(Happens on frequent

basis)

Clogged oil lter Replace oil tank lter or in-line lter if used.

Low oil pump pressure

Air getting into fuel oil lines, or
fuel oil line dirty, clogged, or in
some manner defective

Defective burner motor

Replace nozzle with high quality replacement.
Use rating plate or Tables in Appendix A as a guide.

Connect pressure gauge to oil pump.
Adjust pump pressure, or replace oil pump if necessary.
Verify erratic pressure readings are not caused by defective fuel oil line.
Check fuel oil lines.

Replace any compression ttings found with high quality ared ttings.

Check for signs of oil leaks. Any oil leak is potential source of air or
contaminants.

Check burner motor.
If burner motor is cutting out on over-load, determine why. Replace if

necessary.

24

240011511 REV. C [05/31/2017]

APPENDIX C - SEQUENCE OF OPERATION AND TROUBLESHOOTING

Table C-3: System and General Troubleshooting continued

Problem Possible Cause Remedy

Furnace starts, but cuts
out requiring manually
resetting oil protector
reset button.

Furnace starts, but cuts
out requiring manually
resetting oil protector
reset button.

Photo Cell (Cad Cell) defective.

No fuel oil.

Clogged nozzle.

Clogged oil lter. Replace oil tank lter or in-line lter if used.

Low oil pump pressure.

Air getting into fuel oil lines, or
fuel oil line dirty, clogged, or in
some manner defective.

Defective burner motor.

Water or contaminants in oil. Drain fuel oil storage tank; replace fuel oil. (Consult with fuel oil supplier).

If cad cell is dirty, clean it. Determine why cad cell is getting dirty. If cad
cell is poorly aimed, realign it.

NOTE: Photocell should have resistance of 100 KΩ in absence of light;
maximum of 1500 Ω in presence of light.

Verify room light is not leaking into the cad cell compartment. (See
diagnostic light section).
Check fuel oil supply.

Check that all hand operated fuel oil valves are in the open position.
Fill oil storage tank if necessary.

Replace nozzle with high quality replacement. Use rating plate or Tables in
Appendix A as a guide.

Connect pressure gauge to oil pump.
Adjust pump pressure, or replace oil pump if necessary.
Verify erratic pressure readings are not caused by defective fuel oil line.

Check fuel oil lines. Replace any compression ttings found with high
quality ared ttings.

Check for any signs of oil leaks. Any oil leak is a potential source of air or
contaminants.

Check burner motor.
If burner motor is cutting out on over-load, determine why.
Replace if necessary.

Oil burner sputtering at
nozzle

Excessive fuel oil
consumption.

Frozen oil line.

Electrodes out of adjustment or
defective.

Poor igniter connections or
defective igniter.

Fuel oil lter clogged. Replace fuel oil storage tank lter and / or fuel oil in-line lter.

Defective oil pump.

Fuel oil line partially clogged or
contains air.

System temperature rise too
high.

Poor “fan off” delay timing
selection, (fan stops too soon).

Fuel oil leak. Check fuel oil line for leaks. Repair or replace if necessary.

Gently warm oil line.
Insulate oil line. (Outdoor piping size may require increased diameter).

Check electrode settings.
Check electrodes for dirt build-up or cracks in porcelain.

Check contacts between the igniter and electrodes. If OK, replace the
igniter

Check burner motor and / or fuel oil pump coupling.
Check oil pump pressure. Replace fuel oil pump if necessary.

Bleed air from oil line.
If problem persists, replace oil line.

System temperature rise should not exceed 75°F. Check for clogged air

lters. Check blower fan for excess dirt build-up or debris. Speed up

blower fan if necessary.

Check “fan off” delay timing setting. Use duct thermometer in supply air

plenum take-off or rst few inches of supply air trunk duct. Fan should

shut off at 90° - 100°F. Manipulate dip switch settings to come as close as
possible to this “fan off” temperature.

Stack temperature too high.

Thermostat improperly adjusted
or in poor location.

Check stack temperature. Stack temperatures will normally range from
400° to 500°F. Check draft regulator. Draft should be set to -0.02 in. w.c.

Check thermostat heat anticipator setting against measured amperage
draw. Increase heat anticipator setting if necessary. If thermostat is being

inuenced by drafts, sunlight, duct work, etc., relocate to suitable location.

25

240011511 REV. C [05/31/2017]

APPENDIX C - SEQUENCE OF OPERATION AND TROUBLESHOOTING

Table C-3: System and General Troubleshooting continued

Problem Possible Cause Remedy

Insufcient combustion air

adjustment at oil burner, or

Too much smoke.

Soot building up on blast
tube (end coning).

improper draft pressure.

Heat exchanger partially
clogged.

Poor alignment between oil

burner blast tube and re pot.

Flame impingement caused by
Incorrect nozzle angle.

Defective re-pot Check re-pot. Repair or replace.

Airow blocked or dirty air lter. Clean or replace air lter.

Adjust oil burner combustion air band and draft regulator to gain highest

practical CO2 or lowest practical O2 content in ue gases.

See Burner Set Up.

Check for soot build-up in heat exchanger ue passages, especially in

outer radiator.

Check alignment. Blast tube should be centered with re pot burner
opening. Oil burner head should be ¼ inch back from inside surface of re

pot.

Check nozzle size and angle. (See Appendix A).

Check distance from head to inside surface of re pot.

Furnace will not warm
home to desired
temperature.

Home does not heat
evenly

Supply air temperature
too hot.

Supply air temperature
too cool.

Thermostat adjustments or
location.

Insufcient airow.

Defective high limit control.

Under-sized nozzle.

Blower fan motor stopping
intermittently on overload.

Burner motor stopping
intermittently on overload.

Improper distribution of heat. This is not likely to be a furnace problem. Balance duct system.

Airow blocked or dirty air lter. Clean or replace air lter.

Insufcient airow.

Excess airow. Check system temperature rise. Slow down blower fan if necessary.

Excessive duct losses.

Check thermostat heat anticipator setting against measured amperage
draw. Increase heat anticipator setting if necessary. If thermostat is being

inuenced by drafts, sunlight, duct work, etc., relocate to suitable location.

Check all dampers. Open closed dampers including registers in unused
rooms.

Check system temperature rise. If temperature rise is too high, speed up
blower fan.
Test high limit function of all limit switches. Use duct thermometer to verify
accuracy of limit control.

Check for obstructions to airow around limit switch bimetal elements.

Replace control if necessary.

Check nozzle. If problem is not caused by air ow problems, use larger

nozzle, if permitted by rating plate.
Check blower fan motor amperage draw.
Check motor ventilation ports, clean if necessary. Replace motor if

necessary.

Check burner motor. Replace if necessary.

Check all dampers. Open closed dampers including registers in unused
rooms.

Check system temperature rise. If temperature rise is too high, speed up
blower fan.

Check supply air ductwork. Seal leaky joints and seams. Insulate ductwork
if necessary.

Fan control "fan on" setting too

Supply air temperature

too cool during rst

moments of furnace cycle.

low.

Excessive duct losses.

Increase "fan on” dipswitch settings on EFT if control has this option.

Register air deectors may help.

Check supply air ductwork. Seal leaky joints and seams. Insulate ductwork
if necessary.

26

240011511 REV. C [05/31/2017]

APPENDIX D - HOMEOWNER’S REFERENCE TABLE

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.

27

240011511 REV. C [05/31/2017]

PARTS LISTING

Parts Listing: Chimney Vent Models LRF/LRFV

Ref. No. Description Part No.

1 Left Side Panel 109009625AD
2 Right Side Panel 109009624AD
3 Base Panel Assembly 550003225
4 Rear Panel 109009626AD
5 Blower Door 109009809AD
6 Front Panel 109009786AD

Logo Bezel 28479

7

8 Handle (2 per unit) 28673

9 Top Panel 109008787AD
10 Blower Division Panel 3002357
11 Inner Front Panel 109009627
12 Cleanout Cover (Includes one item 19) 550003223
13
14 Right Side Bafe 109009709
15 Vertical Bafe (2 per unit) 109009711
16 Insulation Retainer (4 per unit) 26047
17 Heat Exchanger (Includes 18,19,20, 25) 550003224
18 Turbulators (18 per unit) 109009176
19 Cleanout Cover Gasket (2 per unit) 240010371
20 Burner Plate Gasket 240010370
21 Front Flue Pipe Assembly 3002314
22 Rear Flue Pipe 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
28 Plug for Draft Measurement Port M10 x 16 Flange Bolt 240010827
29 Limit Disc 60T11 BOF 260°F 30153
30 Limit Disc Retainer 109009401
31 Control Box 30010

32

33

34 Transformer 120-24 VAC 40VA 240005330
35 Low Speed Fan Switch (Direct Drive PSC Models Only) 20693

36

Logo Label Olsen 28563
Logo Label Airco 28564

Left Side Bafe

Control Box Cover (Direct Drive PSC Models) 109009791
Control Box Cover (Direct Drive ECM and Belt Drive Models) 29654
Fan Timer Control 1158-120 UTEC (PSC and Belt Drive Models) 29388
Fan Timer Control 1168-1 UTEC (ECM Models) 240007048

Blower Assembly - Direct Drive PSC Motor (includes 39) 550003217
Blower Housing and Wheel 100-10T Direct Drive 240010315
Blower Motor 1/2 HP 4 Speed 102000131
Motor Mounting Band TR6884B 17811

Motor Mounting Arms 26251
Motor Run Capacitor 10 mfd @ 370 VAC 27743
Capacitor Strap
Blower Base (2 per unit) 109005826
Grommet, Blower Feet (4 per unit) 26415

109009710

27761

28

240011511 REV. C [05/31/2017]

PARTS LISTING

Parts Listing: Chimney Vent Models LRF/LRFV - CONTINUED

Ref. No. Description Part No.

Blower Assembly - Direct Drive ECM Motor (includes 39) 550003218

Blower Housing and Wheel 100-10T Direct Drive 240010315

37

38

39 Auxiliary Limit Disc 60T11 BOF 130°F 30388

40

41 Filter Side Rail (2 per unit) 27370
42 Filter Blower Division Rail 27369

*
*
*
*
*
*
*
*
*
*
*
*
*
*
*
*
*
*

* = Not Shown

Blower Motor 1/2 HP ECM Programmed 102000186
Motor Mounting Band TR6884B 17811
Motor Mounting Arms 26251
Blower Base (2 per unit) 109005826
Grommet, Blower Feet (4 per unit) 26415
Blower Assembly - Belt Drive Motor (includes 39) 550003219
Blower Housing and Wheel 100-10T Belt Drive 240011512
Blower Motor 1/2 HP Single Speed 1725 RPM 102000154
Pulley Motor 3-1/4 x 1/2 MVL 2240001
Pulley Blower 6 x 3/4 2240006
Belt 4L370 2240016
Motor Support Bracket 109008679
Tensioner Support Bracket 109008680
Blower Base (2 per unit) 109005826
Grommet, Blower Feet (4 per unit) 26415

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

Air Filter 20 x 20 x 1 Permanent 2180032
Wire Harness Control Board Power 29751
Wire Harness Direct Drive PSC Blower 240011383
Wire Harness Control Board to Burner and Limits 240011384
Wire Harness Direct Drive ECM Blower Control Intermediate 240011385
Wire Harness Direct Drive ECM Blower Control Ends (2 per unit) 240011386
Wire Harness Direct Drive ECM Blower Power 240011387
Wire Harness Belt Drive Blower 240011389
Blocked Vent Safety Switch Kit Complete 30690
Blocked Vent Safety Switch - Replacement Switch Only 30660
Flue Pipe for Blocked Vent Safety Switch 30655
Draft Regulator 27494

0.60-60°W Oil Nozzle 240007739

0.65-60°W Oil Nozzle 240006431

0.50-90°B Oil Nozzle 240010815

0.65-80°B Oil Nozzle 1320011

0.75-80°B Oil Nozzle 1320008

0.65-70°B Oil Nozzle 14619022

29

240011511 REV. C [05/31/2017]

PARTS LISTING

Parts Listing: Direct Vent Models LRF/LRFV

Ref. No. Description Part No.

All parts are same as listed for chimney vent models secept as listed below.

12 Cleanout Cover w/ Pressure Tap for Direct Vent (Includes one item 19) 550003409

Oil Burner Assembly, Beckett NX56LQ 0.50-60°W 550003406

40

* Pressure Switch for use with Riello Burners 0.42" WC (Blocked Vent Safety Switch) 240011861
* Pressure 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 109005950
* Combustion Air Intake Collar 3" for Riello Burner 109006030
* Combustion Air Intake Elbow 3" for Riello Burner 240011899
* Combustion Air Intake Increaser 3" x 4" for Riello Burner 240011310
* 4" x 10' Vent Kit (Includes Vent Terminal Connector) 240006909
* 4" x 15' Vent Kit (Includes Vent Terminal Connector) 240006910
* 4" x 20' Vent Kit (Includes Vent Terminal Connector) 240006911
* 4" Vent Terminal Connector - Connects Vent Pipe to Vent Terminal 240006914
* Standard Vent Terminal 28972
* Riser Vent Terminal 29231
* Wire Harness Control Board to Burner and Limits and Pressure Switch 240011894

* = Not Shown

Oil Burner Assembly, Riello 40BF3 0.55-80°B (0.55/0.65 USGPH Firing Rates) 550003407
Oil Burner Assembly, Riello 40BF5 0.65-80°B (0.75/0.85 USGPH Firing Rates) 550003408

30

240011511 REV. C [05/31/2017]

Model LRF/LRFV Diagram

PARTS LISTING

1

25

4

41

24

13

25

21

9

15

16

29

7

19

12

30

18

20

25

10

17

3

22

32

35

23

33

31

34

14

42

39

38

15

37

36

8

5

41

2

16

8

6

40

27

26

28

11

19

31

31

16

240011511 REV. C [05/31/2017]

ECR International

2210 Dwyer Avenue, Utica NY 13501

web site: www.ecrinternational.com