ECR International A Series User manual

UMLA
Four Position Multipoise Model
UMLVA
Four Position Multipoise Model with ECM
Series A
Oil Fired Warm Air Furnaces
INSTALL ATION, OPER ATION &
MAINTENANCE MANUAL
Manufactured by:
ECR International Inc.
2201 Dwyer Avenue, Utica, NY 13501
Tel. [phone]
www.ecrinternational.com
PN 240010964 REV. L [10/01/2021]

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PN 240010964 Rev. L [10/01/2021]
Furnace
Model
Cabinet Plenum Openings
Flue
Diameter
Filter Shipping
Weight
(LB)
Width Depth Height Supply Return Type Size
Side Bottom
UMLA/
UMLVA
19" 20³/16" 42¾" 17¾"W x 18¾"D 14" x 18" 14" x 18" 5"
Permanent
16" x 20"
x 1" 188 LB
48.3 cm 51.3 cm 108.6 cm 45.1 cm x 47.6cm 35.6 cm x
45.7 cm
35.6 cm x
45.7cm 12.7 cm
40.6 cm x
50.8 cm x 2.5
cm
85.5 Kg
DIMENSIONS
17 3/4"
19"
20 3/16"
1 11/16"
18 3/4"
42 3/4"
A
Burner
Model
A - Dimension
[inches / cm]
Beckett AFG 11½ [29.2]
Beckett AFG w/Cover 12¾ [32.4]
Beckett NX 12 [25.4]
Beckett NX w/ Cover 13¼ [33.7]
Riello 40F3 10½ [26.7]
Riello 40BF3 10⅝ [27.0]
Riello 40BF5 10⅞ [27.6]
Carlin EZ-LF 11¾ [29.8]
34-3/4"42-3/4"

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PN 240010964 Rev. L [10/01/2021]
Information and specications outlined in this manual in eect 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.
1. General ............................................................................................................................. 4
2. Safety Symbols .................................................................................................................. 4
3. Introduction Models UMLA/UMLVA ........................................................................................ 4
4. Heat Loss........................................................................................................................... 4
5. Locating the Unit ................................................................................................................ 5
5.1 Upow Installation .............................................................................................................. 5
5.2 Downow Installation .......................................................................................................... 5
5.3 Horizontal Installation.......................................................................................................... 5
5.3a Non-Suspended Installation .................................................................................................. 5
5.3b Suspended Installation ........................................................................................................ 5
6. Furnace Used In Conjunction With Air Conditioning.................................................................. 6
7. Air Filter ............................................................................................................................ 6
8. Ductwork ........................................................................................................................... 6
9. Combustion and Ventilation Air ............................................................................................. 7
10. Chimney Venting................................................................................................................. 7
11. Barometric Damper Control .................................................................................................. 8
12. Optional Direct Venting ........................................................................................................ 8
13a. Fan Timer Board And Limit Control (UMLA) ........................................................................... 8
13b. Fan Timer Board And Limit Control (UMLVA) ........................................................................... 8
14. Electrical Connections .......................................................................................................... 8
15. Humidier .......................................................................................................................... 9
16. Piping Installation ............................................................................................................... 9
17. Oil Filter............................................................................................................................. 9
18. Oil Burner Nozzles............................................................................................................... 9
19. Oil Burner Adjustment ......................................................................................................... 9
20. Burner Electrodes................................................................................................................ 9
21. Burner Primary (Safety) Control............................................................................................ 9
22a. Circulating Air Blower (UMLA) ..............................................................................................10
22b. Circulating Air Blower (UMLVA).............................................................................................10
23. Maintenance And Service ....................................................................................................10
24. Operating Instructions (UMLA) .............................................................................................11
25. Operating Instructions (UMLVA) ...........................................................................................11
Appendix A - Check out and Adjustment...................................................................................12
A.1 Oil Burner Air Adjustment .............................................................................................15
A.2 Burner Electrodes ........................................................................................................15
A.3 Start Up .....................................................................................................................16
A.4 Final Check Out ...........................................................................................................16
Appendix B - Wiring Diagrams..................................................................................................20
Chimney Vent Furnace Wiring Diagram UMLA/UMLVA .............................................................20
Direct Vent Furnace Wiring Diagram UMLA/UMLVA .................................................................21
Appendix C -Sequence of Operation and Troubleshooting.........................................................23
C.1 Troubleshooting ...........................................................................................................24
C.2 Preliminary Steps: .......................................................................................................24
C.3 Check Oil Primary Control .............................................................................................24
Appendix D - Home Owners Reference Table............................................................................28
Parts Listing: Chimney Vent Models UMLA/UMLVA...................................................................29
Parts Listing: Direct Vent Models UMLA/UMLVA.......................................................................30
Parts Diagram..........................................................................................................................31
Check our website frequently for updates: www.ecrinternational.com

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PN 240010964 Rev. L [10/01/2021]
3. Introduction Models UMLA/UMLVA
Models UMLA and UMLVA are oil red forced air four position
multipoise furnaces with an output capacity range of 65,000 BTU/
hr to 98,000 BTU/hr.
• UMLA is equipped with 1/2 HP PSC 4 speed blower motor.
• UMLVA 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.
• 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:
• 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.
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.
!
NOTICE
Used to address practices not related to personal
injury.
CAUTION
Indicates a hazardous situation which, if not avoided,
could result in minor or moderate injury.
!!
WARNING
Indicates a hazardous situation which, if not avoided,
could result in death or serious injury.
!
DANGER
Indicates a hazardous situation which, if not avoided,
WILL result in death or serious injury
!
This is the safety alert symbol. Symbol alerts you to potentialThis is the safety alert symbol. Symbol alerts you to potential
personal injury hazards. Obey all safety messages following thispersonal injury hazards. Obey all safety messages following this
symbol to avoid possible injury or death.symbol to avoid possible injury or death.
Become familiar with symbols identifyingBecome familiar with symbols identifying
potential hazards.potential hazards.
2. Safety Symbols
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.
!
WARNING
Fire, burn, asphyxiation hazard. Remove and discard
cardboard before operating furnace. It is for shipping
purposes only. Failure to follow these instructions could
result in death or serious injury.
!

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PN 240010964 Rev. L [10/01/2021]
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 1]
• 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.
5.2 Downow Installation
Maintain all clearances to combustibles. See Table 1.
When furnace is installed in downow position on combustible
oor, the downow oor base 550003032 may be used to ensure
required clearances. Refer to instructions provided with the base.
Return air opening maybe located on either side or base panel
(i.e. now at the top in downow position) of the furnace.
• Rotate furnace 180° to desired position.
• Loosen four (4) nuts fastening oil burner assembly to
furnace. Rotate oil burner 180° to normal upright position.
Retighten four (4) nuts fastening oil burner assembly to
furnace.
• Beckett NX oil burner is not approved for downow
installation when burner is equipped with burner cover.
5.3 Horizontal Installation
Maintain all clearances to combustibles. See Table 1. The furnace
may be installed in either of the horizontal positions, warm air
discharging left or warm air discharging right. Return air opening
may be located on either side or base panel of furnace.
• Rotate furnace 90° to desired position.
• Loosen four (4) nuts fastening oil burner assembly to
furnace. Rotate oil burner 90° in the opposite direction to
normal upright position. Retighten four (4) nuts fastening oil
burner assembly to furnace.
• Beckett AFG and Beckett NX oil burners are not approved for
horizontal installation when burner is equipped with burner
cover.
5.3a Non-Suspended Installation
• Installation on combustible oor requires 1 inch clearance.
• This can be accomplished by using non-combustible material
such as 1 inch thick channel iron or similar material.
• Support furnace to not allow twisting or sagging of cabinet.
5.3b Suspended Installation (See Figure 1)
• Suspend furnace by eld fabricating a cradle of angle iron and
threaded rod.
• Secure furnace with 2 inch minimum slotted angle or
equivalent.
• Support furnace to not allow twisting or sagging of cabinet.
• Position supports to not interfere with accessing blower
compartment, burner and limit control.
FIGURE 1: Heat Exchanger Support Screw Location
Table 1: Minimum Installation Clearances
Location
Clearance to Combustibles
UMLA and UMLVA
Upow Downow Horizontal
Top N/A N/A 1" (26 mm)
Bottom 0" 0" ** 1" (26 mm)
Plenum Top 1" (26 mm) 2" (52 mm) 1" (26 mm)
Horizontal Duct 1" (26 mm) 2" (52 mm) 1" (26 mm)
Rear 1" (26 mm) 1" (26 mm) 1" (26 mm)
Sides 1" (26 mm) 1" (26 mm) N/A
Front 18" (458 mm) * 18" (458 mm) * 18" (458 mm) *
Flue Pipe 5" (127 mm) 5" (127 mm) 5" (127 mm)
Flue Pipe to
Beckett AFG
Cover
2.5" (64 mm) 2.5" (64 mm) N/A
Flue Pipe to
Beckett NX
Cover
2.5" (64 mm) N/A N/A
Enclosure Closet Closet Closet
* 24" (610 mm) Service Clearance
** When using combustible oor sub base 550003032 for downow on
combustible oor.
5.1 Upow Installation
Maintain all clearances to combustibles. See Table 1.
The furnace is factory assembled for installation in the upow
position. Locate return air opening on either side or base panel of
the furnace.

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PN 240010964 Rev. L [10/01/2021]
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 o plates to close gap between furnace
cabinet and coil casing. See Figures 2a and 2b.
• Cased evaporator coils with cases that are smaller than
the furnace cabinet should not be used as they will restrict
airow.
7. Air Filter
• Install properly sized air lter on return air side of unit.
• Furnace is supplied with 16" x 20" permanent air lter and
lter frame.
• If lter is damaged, replace with lter of same size and type.
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.
• Return air may enter furnace through the right or left side
panels or the base panel. Cut out the appropriate 14" x 18"
return air opening accordingly. On side panel, remove four
(4) 3/4" button plugs to expose 3/4" round holes which
dene 14" x 18" opening. The base panel has 3/4" square
knockouts to dene the 14" x 18" return air opening. Take
care not to damage wires inside while cutting the opening.
• Mount the furnished lter frame and lter frame end support
on the return air opening. See Figure 3.
• Connect return air ductwork to lter frame.
• Use of an appropriately sized prefabricated return air boot
( sometimes referred to as a Bualo boot) equipped with a
16" x 20" lter slot may be used as an option. In this case
use the furnished lter frame and lter frame end closer as
a transition piece to connect the return air boot to furnace's
return air opening. See Figures 4a and 4b.
• Manufacturer recommends installing blower door before
handling or moving the unit.
FIGURE 2b: Evaporator Coil Centered Over
Narrow Furnace
FIGURE 2a: Evaporator Coil
Block-O Plates

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PN 240010964 Rev. L [10/01/2021]
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.
FIGURE 3: Filter Frame and Frame End
Support
FIGURE 4a: Filter Frame End Closer
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.
WARNING
Asphyxiation hazard. Chimney vented versions of
furnace must be connected to ue having sucient
draft at all times. Failure to follow these instructions
could result in death or serious injury.
!
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).
FIGURE 4b: Bualo Boot Installation
Filter Slot
End Support Filter Frame
Filter Frame
End Closer Filter Frame
Bualo Boot
In place
Filter Slot in
Bualo Boot
WARNING
Failure to provide adequate combustion and ventilation
air could result could result in death or serious injury.
!

8
PN 240010964 Rev. L [10/01/2021]
Chart 1- United Technologies 1158-120 (UMLA)
Dip Switch Position Blower Delay Times
1 2 3 4 On Seconds O Minutes
O O 30
On O 60
O On 90
On On 120
O O 2
On O 3
O On 4
On On 6
furnaces are manufactured as direct vent units. Refer to Direct
Vent Installation, Operation and Maintenance Manual, part number
240011300, 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.
13a. Fan Timer Board And Limit Control (UMLA)
[See Figure 5, page 16]
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 UML100A models and 60 seconds for UML65/80/90A
models.
• United Technologies 1158-120 has an adjustable fan o time
of 2, 3, 4 or 6 minutes as displayed in Chart 1. Fan o 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
o delay is 3 minutes.
• Electronic fan timer board works in conjunction with snap
disc limit controls, performing a safety function, shutting o
burner if furnace over-heats.
• Limit control is thermally operated and automatically
resets. Limit control is factory installed, pre-set and is not
adjustable.
13b. Fan Timer Board And Limit Control
(UMLVA) [See Figure 6, page 16]
United Technologies 1168-1 ECM tap board has adjustable fan on/
o delay and airow settings that must be adjusted in accordance
with furnace input rating (nozzle size). Refer to Table A-9 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 UML 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.
• 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.
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 su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 UMLA and UMLVA
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.
• United States, refer to NFPA 31 for regulations governing the
installation of oil burning equipment.
See appendix A for burner set-up.
• If limit control opens with United Technologies 1158-120
electronic fan control, circulating fan will energize. When
limit closes, fan o timer begins. At the end of fan o time
cycle burner is energized, initiating normal burner cycle.

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PN 240010964 Rev. L [10/01/2021]
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.
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.
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 eciency.
• UMLA and UMLVA operate most e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 e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 Installation, Operation and Maintenance
Manual included with the 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.
• 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.
• 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.
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.
NOTICE
Do not tamper with furnace controls they are sensitive.
If problems persist, call your service contractor.

10
PN 240010964 Rev. L [10/01/2021]
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.
22b. Circulating Air Blower (UMLVA)
UMLVA furnace models are equipped with electronically
commutated motors (ECM).
Setting Blower Speed and “ON” and “OFF” Timings
Blower speed and on/o time delays are handled by ECM motor
programming and are set via dipswitches per Table A-9. Heating
airow rate is SW1 and on/o 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 eciency and reduced noise
levels.
• Dehumidication: 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 e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.
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.
!
22a. Circulating Air Blower (UMLA)
• Furnace models are equipped with direct drive blower
systems.
• UMLA models are equipped with four speed PSC motors.
• Set blower speed to match installed ring rate and external
static pressure per Table A-6.
• Additional 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 a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. Move BLUE wire on fan timer board from HEAT
terminal to UNUSED MOTOR LEAD Terminal. Move jumper
provided with BLACK wire on fan timer board from UNUSED
MOTOR LEAD terminal to HEAT terminal. Move BLACK wire
on blower motor to chosen speed tap.
• Do not connect power leads between motor speeds.
Always connect neutral wire to motor's designated
neutral terminal.
• 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
suciently high voltages to damage accessory
equipment.
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.
!

11
PN 240010964 Rev. L [10/01/2021]
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 o oil supply, shut o power to
the furnace and remove burner.
• Remove ue collar 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 ue collar, inspect gaskets. If gasket is
broken, remove remnants and replace with new gaskets.
Replace ue collar.
• 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 o delay function
continues to start and stop blower fan at optimal settings.
• Check operation of limit switch.
24. Operating Instructions (UMLA)
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 UML100A models and 60 seconds for
UML65/80/90A models.
3. Set thermostat below room temperature. Oil burner stops.
4. Air circulation blower continues to operate until time o
setting selected on electronic fan timer control times out.
United Technologies 1158-120 has adjustable fan o time
of 2, 3, 4 or 6 minutes. Manufacturer recommended fan
o delay is 3 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 (UMLVA)
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/o time delay programmed into ECM motor, and is set by
selecting SW4 DIP switch combination displayed in Table A-9.
Adjust Fan on/o delay according to input (nozzle size).
3. Set thermostat below room temperature. Oil burner stops.
4. Air circulation blower continues to operate until blower o
delay setting programmed into ECM motor times out.
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".

12
PN 240010964 Rev. L [10/01/2021]
Check out and adjustments
UMLA and UMLVA 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 Riello 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 instruments.
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
UML65A
UMLV65A 66,000 AFG70MPSS 0.50 / 45°W 140 0.55 L2 4
UML80A
UMLV80A 77,000 AFG70MPSS 0.50 / 45°W 175 0.65 L2 5
UML90A
UMLV90A 88,000 AFG70MPSS 0.60 / 60°W 175 0.75 L2 7
UML100A
UMLV100A 98,000 AFG70MPSS 0.65 / 60°W 175 0.85 L2 8
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 Ba󰀪e
Air
Setting
UML65ANXU
UMLV65ANXU 65,000 NX56LQ 0.50 / 60°W 140 0.55 Yes 3
UML80ANXU
UMLV80ANXU 76,000 NX56LQ 0.50 / 60°W 175 0.65 Yes 3.25
UML90ANXU
UMLV90ANXU 86,000 NX56LQ 0.60 / 60°W 175 0.75 No* 3.25
UML100ANXU
UMLV100ANXU 97,000 NX56LQ 0.65 / 60°W 175 0.85 No* 3.75
* Burner is factory equipped with low ring rate ba󰀪e. Remove for 0.75 and 0.85 USGPH ring rates.
APPENDIX A - CHECK OUT AND ADJUSTMENTS

13
PN 240010964 Rev. L [10/01/2021]
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 Output
BTU/Hr
Burner
Model
Delavan
Nozzle
Pump
Pressure
[PSIG]
Flow Rate
[USGPH]
Head
Setting
Air
Setting
UML65ARF
UMLV65ARF 66,000 40F3 VSBT 0.50 / 90°B 125 0.55 0 1.6
UML80ARF
UMLV80ARF 77,000 40F3 VSBT 0.55 / 80°B 140 0.65 0 2.1
UML90ARF
UMLV90ARF 87,000 40F3 VSBT 0.65 / 80°B 133 0.75 1 2.5
UML100ARF
UMLV100ARF 97,000 40F3 VSBT 0.75 / 80°B 128 0.85 2 3
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]
Turbulator
Setting
Air
Setting
UML65ARBU
UMLV65ARBU 65,000 40BF3 0.50 / 90°B 125 0.55 0.0 4.25
UML80ARBU
UMLV80ARBU 76,000 40BF3 0.55 / 80°B 140 0.65 1.0 5.25
UML90ARBU
UMLV90ARBU 86,000 40BF5 0.65 / 80°B 140 0.75 0.0 3.75
UML100ARBU
UMLV100ARBU 97,000 40BF5 0.75 / 80°B 130 0.85 0.0 4.25
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.

14
PN 240010964 Rev. L [10/01/2021]
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]
Flow
Rate
[USGPH]
Air
Band Head Bar Air Setting
UML65AC
UMLV65AC 66,000 EZ-LF 0.50 / 70°B 125 0.55 Single
Slot 0.60 / 0.65 35%
UML80AC
UMLV80AC 78,000 EZ-LF 0.50 / 70°B 170 0.65 Single
Slot 0.60 / 0.65 65%
UML90AC
UMLV90AC 88,000 EZ-LF 0.65 / 70°B 135 0.75 Two
Slot* 0.75 45%
UML100AC
UMLV100AC 98,000 EZ-LF 0.65 / 70°B 170 0.85 Two
Slot* 0.85 / 1.00 45%
* 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.
APPENDIX A - CHECK OUT AND ADJUSTMENTS

15
PN 240010964 Rev. L [10/01/2021]
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 ecient combustion.
Beckett AFG
• Electrode gap: 5/32 inch.
• Distance above horizontal center-line: 1/4 inch.
• Distance ahead of nozzle: 1/8 inch.
• “Z” dimension, distance from front of end cone (head) to
face of nozzle should be 1-3/4 inch.
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
manual supplied with furnace.
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.
APPENDIX A - CHECK OUT AND ADJUSTMENTS
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 adjustment.
Beckett NX Burner (Direct Vent)
Loosen splined nut on nozzle line one turn. Turn adjustment screw
clockwise to increase air and counterclockwise 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
head screwdriver turn adjustment screw clockwise to increase air
or counterclockwise 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.

16
PN 240010964 Rev. L [10/01/2021]
A.3 Start Up
Use following instructions to set the burner:
1. Shut o 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-5.
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 and ZERO smoke
for directed vented units.
10. Check system temperature rise. Temperatureriseisthe
dierence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 o. 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 o delay.
13. Check operation of limit switch.
A. Shut o power to furnace.
B. Temporarily remove neutral wire from PSC blower motor
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 o.
F. When limit function test is complete, shut o electrical
power to furnace, replace neutral wire to PSC blower
motor or 5 pin power connector to ECM blower motor.
Restore power.
G. Blower fan will start up immediately. Once temperature
has dropped and limit control has reset, fan will operate
until fan o time is reached.
H. Oil burner will resume operation and continue until
thermostat is satised.
I. Restore thermostat setting to comfortable temperature.
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. Run furnace through at least three full cycles before leaving
APPENDIX A - CHECK OUT AND ADJUSTMENTS
the installation, to ensure all controls are operating properly.
16. Direct vented units - check all joints in positive pressure
venting system for leaks before leaving installation site.
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 "o"
positions if not obvious.
• Where oil shut-o 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.

17
PN 240010964 Rev. L [10/01/2021]
APPENDIX A - CHECK OUT AND ADJUSTMENTS
FIGURE 6: UNITED TECHNOLOGIES 1168-1 ECM TAP BOARD (UMLVA)
FIGURE 5: UNITED TECHNOLOGIES 1158-120 FAN TIMER BOARD (UMLA)

18
PN 240010964 Rev. L [10/01/2021]
Table A-6 Direct Drive Blower Motor Setup - 1/2 HP PSC Motor
Furnace
Model Blower
Blower Set-Up Cooling Capacity
0.20 in. w.c. 0.50 in. w.c. Tons CFM Range
Speed Speed
UML65A 100-10T DD Medium Low Medium Low 3 738-1339
UML80A 100-10T DD Medium Low Medium Low 3 738-1339
UML90A 100-10T DD Medium High High 3 738-1339
UML100A 100-10T DD Medium High High 3 738-1339
Table A-7 Direct Drive Blower Characteristics - 1/2 HP PSC Motor
Furnace
Model Blower Motor FLA ∆T Speed
CFM
External Static Pressure – Inches w.c.
0.20 0.30 0.40 0.50 0.60
UMLA
65 – 100 100-10T DD 7.1 45-75 °F
High 1618 1519 1432 1339 1235
Med-High 1504 1433 1340 1241 1132
Med-Low 1110 1080 1027 972 882
Low 795 781 767 738 723
APPENDIX A - CHECK OUT AND ADJUSTMENTS
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)
Table A-8 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
POS.
SW2 - COOL
POS.
DIP Switch Position INPUT DIP Switch Position AC Size
1 2 USGPH 1 2 (TON)
OFF OFF A 0.65 OFF OFF A 3.5
ON OFF B 0.85 ON OFF B 3
OFF ON C 0.75 OFF ON C 2.5
ON ON D 0.55 ON ON D 2
SW3 - ADJUST
POS.
SW4 - DELAY
POS.
DIP Switch Position CFM DIP Switch Position INPUT
1 2 1 2 USGPH
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
NOTE: SW1 (HEAT) AND SW4 (DELAY) DIP SWITCHES MUST BOTH BE ADJUSTED ACCORDING
TO INPUT (NOZZLE SIZE).
SW2 (COOL): 1 TON is approximately equal to 400 CFM
SW3 (ADJUST): (Heating Mode) Increase OR decrease temperature rise respectively
(Cooling Mode) Increase OR decrease CFM respectively

19
PN 240010964 Rev. L [10/01/2021]
APPENDIX A - CHECK OUT AND ADJUSTMENTS
Table A-9 Direct Drive Blower Characteristics - 1/2 HP ECM Variable Speed Constant CFM Motor
Furnace Model Blower Motor HP Motor FLA ∆T
UMLV 65-100 100-10T DD 1/2 HP ECM 7.7 45-75°F
OIL HEATING
SW1 HEAT
DIP SWITCH POSITION
INPUT
[USGPH]
CFM WITH SW3-ADJ
DIP SWITCH POSITION A
CFM WITH SW3-ADJ
DIP SWITCH POSITION B
CFM WITH SW3-ADJ
DIP SWITCH POSITION C
A (1=OFF, 2=OFF) 0.65 982 1129 835
B (1=ON, 2=OFF) 0.85 1500 1500 1275
C (1=OFF, 2=ON) 0.75 1170 1346 995
D (1=ON, 2=ON) 0.55 852 980 724
CONTINUOUS FAN
SW2 COOL
DIP SWITCH POSITION
AC SIZE
[TONS]
CFM WITH SW3-ADJ
DIP SWITCH POSITION A
CFM WITH SW3-ADJ
DIP SWITCH POSITION B
CFM WITH SW3-ADJ
DIP SWITCH POSITION C
A (1=OFF, 2=OFF) 3.5 700 805 595
B (1=ON, 2=OFF) 3 600 690 510
C (1=OFF, 2=ON) 2.5 500 575 425
D (1=ON, 2=ON) 2 400 460 340
COOLING OR HEAT PUMP HEATING
SW2 COOL
DIP SWITCH POSITION
AC SIZE
[TONS]
CFM WITH SW3-ADJ
DIP SWITCH POSITION A
CFM WITH SW3-ADJ
DIP SWITCH POSITION B
CFM WITH SW3-ADJ
DIP SWITCH POSITION C
A (1=OFF, 2=OFF) 3.5 1400 1500 1190
B (1=ON, 2=OFF) 3 1200 1380 1020
C (1=OFF, 2=ON) 2.5 1000 1150 850
D (1=ON, 2=ON) 2 800 920 680
CFM's shown are reduced by 20% if 24 VAC input is to Y1 (slow speed of 2 speed compressor) instead of Y/Y2
DELAY PROFILE FOR OIL HEATING
SW4 DELAY
DIP SWITCH POSITION
INPUT
[USGPH]
PRE RUN ON DELAY SHORT RUN ON DELAY OFF DELAY
TIME - CFM LEVEL TIME - CFM LEVEL TIME - CFM LEVEL
A (1=OFF, 2=OFF) 0.65 60 SECONDS - 0% 60 SECONDS - 50% 3 MINUTES - 75%
B (1=ON, 2=OFF) 0.85 30 SECONDS - 0% 60 SECONDS - 63% 3 MINUTES - 88%
C (1=OFF, 2=ON) 0.75 60 SECONDS - 0% 60 SECONDS - 50% 3 MINUTES - 82%
D (1=ON, 2=ON) 0.55 60 SECONDS - 0% 60 SECONDS - 50 % 3 MINUTES - 69%
DELAY PROFILE FOR COOLING OR HEAT PUMP HEATING
NO ADJUSTMENT AC SIZE PRE RUN ON DELAY SHORT RUN ON DELAY OFF DELAY
REQUIRED [TONS] TIME - CFM LEVEL TIME - CFM LEVEL TIME - CFM LEVEL
N/A ALL 7.5 MINUTES - 82% NONE NONE

20
PN 240010964 Rev. L [10/01/2021]
APPENDIX B - WIRING DIAGRAMS
Chimney Vent Furnace Wiring Diagram UMLA/UMLVA