York P2DHX16F12001, P3DHX12F08001, P4LBX20F19001, P2LBX16F14501 User Manual

INSTALLATION

MANUAL

CONTENTS

OIL-FIRED WARM AIR

FURNACE

P3DHX12F08001 P2DHX16F12001

(Downflow or Horizontal Models)

P2LBX16F14501 P4LBX20F19001

INTRODUCTION............................................................. 2

HEAT LOSS....................................................................2

LOCATION OF UNIT ......................................................2

AIR CONDITIONING.......................................................4

COMBUSTION AIR......................................................... 4

CHIMNEY VENTING....................................................... 4

OIL TANK........................................................................6

PIPING INSTALLATION................................................. 6

ELECTRICAL CONNECTIONS ......................................6

CIRCULATING AIR BLOWER........................................ 7

OIL BURNER..................................................................8

FURNACE INSTALLATION SET-UP.............................9

MAINTENANCE AND SERVICE...................................10

OPERATING INSTRUCTIONS .....................................10

TABLE A-1: BECKETT OIL BURNER SET-UP ...........11

TABLE A-2: DIRECT DRIVE BLOWER SET-UP .........12

TABLE A-3: BELT DRIVE BLOWER SET-UP .............12

TABLE A-4: DIRECT DRIVE BLOWER

CHARACTERISTICS....................................................13

TABLE A-5: BELT DRIVE BLOWER

CHARACTERISTICS....................................................13

GENERAL DIMENSIONS - P2LBX16F14501...............14

GENERAL DIMENSIONS - P4LBX20F19001...............14

GENERAL DIMENSIONS - P4LBX20F19001...............15

GENERAL DIMENSIONS - P3DHX12F08001.............. 15

GENERAL DIMENSIONS - P3DHX12F08001.............. 16

GENERAL DIMENSIONS - P2DHX16F12001.............. 16

GENERAL DIMENSIONS - P2DHX16F12001.............. 17

WIRING DIAGRAM: MODEL P3DHX12F08001...........18

WIRING DIAGRAM: MODEL P2DHX16F12001...........18

WIRING DIAGRAM: MODEL P2LBX16F14501...........19

WIRING DIAGRAM: MODEL P4LBX20F19001...........19

R7184 DETAILED SEQUENCE OF OPERATION........ 20

R7184 LED DIAGNOSTIC LIGHT.................................22

Table C-1: Cad Cell Resistance................................. 22

R8184N NOTES............................................................22

TABLE C-2: R7184 TROUBLESHOOTING.................23

TABLE C-3: SYSTEM AND GENERAL

TROUBLESHOOTING.................................................. 25

P4LBX20F19001 ASSEMBLY NOTES.........................28

P3DHX SERIES DOWNFLOW CONFIGURATION

NOTES.......................................................................... 28

P3DHX12F08001 VESTIBULE KIT...............................29

REPAIR PART LIST – P3DHX12F08001A................... 30

REPAIR PART LIST – P2DHX16F12001A................... 31

REPAIR PART LIST – P2LBX16F14501A...................32

REPAIR PART LIST – P4LB SERIES..........................33

REPLACEMENT PART CONTACT INFORMATION.... 34

(Lowboy Models)

Read this manual completely before beginning
installation.
Important: These instructions must be kept with
the furnace for future reference.

1

IMPROPER INSTALLATION MAY CRE­ATE A CONDITION WHERE THE OP­ERATION OF THE PRODUCT COULD
CAUSE PERSONAL INJURY OR
PROPERTY DAMAGE.

IMPROPER INSTALLATION, ADJUST­MENT, ALTERATION, SERVICE OR
MAINTENANCE CAN CAUSE INJURY
OR PROPERTY DAMAGE. REFER TO
THIS MANUAL FOR ASSISTANCE OR
ADDITIONAL INFORMATION, CON­SULT A QUALIFIED INSTALLER, SER­VICE AGENCY OR THE FUEL SUP­PLIER.

THIS PRODUCT MUST BE INSTALLED
IN STRICT COMPLIANCE WITH THESE
INSTALLATION INSTRUCTIONS AND
ANY APPLICABLE LOCAL, STATE,
AND NATIONAL CODES INCLUDING
BUT NOT LIMITED TO: BUILDING,
ELECTRICAL AND MECHANICAL
CODES.

The furnace area must not be used as a
broom closet or for any other storage
purposes, as a fire hazard may be cre­ated. Never store items such as the fol­lowing on, near or in contact with the
furnace:

1. Spray or aerosol cans, rags,
brooms, dust mops, vacuum clean­ers or other cleaning tools.

2. Soap powders, bleaches, waxes or
other cleaning compounds; plastic
items or containers, gasoline, kero­sene, cigarette lighter fluid, dry
cleaning fluids, or other volatile flu­ids.

3. Paint thinners or other painting ma­terials and compounds.

4. Paper bags, boxes, or other paper
or cardboard products.

Never operate the furnace with the
blower door removed. To do so could
result in serious personal injury and/or
equipment damage.

DO NOT USE GASOLINE, CRANK­CASE OIL, OR ANY OTHER OIL
CONTAINING GASOLINE AS A
FUEL FOR THIS FURNACE.

INTRODUCTION

Please read these instructions com­pletely and carefully before installing and
operating the furnace.

The furnace must be installed and set up
by a qualified contractor.

Model P3DHX12F08001 is an oil fired

forced air multi-positional furnace, with
an output capacity range of 60,000
BTU/Hr. to 90,000 BTU/Hr. Model

P2DHX16F12001 is an oil fired forced air

multi-positional furnace, with an output
capacity range of 91,000 BTU/Hr. to
128,000 BTU/Hr. These models may be
installed in the down-flow position, as
well as both horizontal positions.

Model P2LBX16F14501 is a rear-breech

lowboy model with an output range of
130,000 to 143,000 BTUH. Model

P4LBX20F19001 is a rear-breech low-

boy model with an output range of
168,000 to 188,000 BTUH.

All models are listed with the Canadian
Standards Association, (CSA), and com-

ply with the standards of both the United
States and Canada for use with No. 1
(Stove) and No. 2 (Furnace) Oil.

In the United States, the installation of
the furnace and related equipment shall
be installed in accordance with the regu-

lations of NFPA No. 31, Installation of Oil
Burning Equipment, as well as in accor-

dance with local codes.

In Canada, the installation of the furnace
and related equipment shall be installed
in accordance with the regulations of

CAN/CSA - B139, Installation Code For
Oil Burning Equipment, as well as in

accordance with local codes.

When installation or application ques­tions arise, regulations prescribed in the
National Codes and Local Regulations
take precedence over the general in­structions provided with this installation
manual. When in doubt, please consult
your local authorities.

All P*DHX models are shipped assem­bled, pre-wired, ready for down-flow op­eration. P*DHX furnace models are air
conditioning ready. The furnace should
be carefully inspected for damage when
being unpacked.

The P2LBX16F14501 model is shipped
assembled, pre-wired, and ready for
lowboy furnace applications. The
P2LBX16F14501 model is air condition­ing ready.

The P4LBX20F19001 is shipped in two
pieces, a furnace section and a blower
section, and must be assembled at the
installation site. Some field wiring is re­quired. The P4LBX20F19001 is shipped
as a heating only furnace; however, air
conditioning may be added with the addi­tion of field-installed controls.

HEAT LOSS

To determine the correct furnace and
firing rate for an application, it is neces­sary to calculate the maximum hourly
heat loss of the building based on local
design conditions. In new construction,
the heat loss should be calculated on a
room-by-room basis to enable proper
sizing of the trunk and branch ductwork.
In retrofit applications, a building shell
(overall) heat loss calculation may be
used.

In the United States, Manual J.
"Load Calculation
Conditioning Contractors of America,
(ACCA), describes a suitable procedure
for calculating the maximum hourly heat
loss.

In Canada, the maximum hourly heat
loss may be calculated in accordance
with the procedures described in the
manuals of the Heating, Refrigeration
and Air Conditioning Institute (HRAI), or
by other method prescribed by authori­ties having jurisdiction that are suitable
for local conditions.

" published by the Air

titled,

LOCATION OF UNIT

The furnace should be located such that
the flue connection to the chimney is
short, direct and consists of as few el­bows as possible. When possible, the
unit should be centralized with respect to
the supply and return air ductwork. A
central location minimizes the trunk duct
sizing.

Minimum installation clearances are
listed in Table 1.

NOTE: The recommended installation

clearances do not necessarily take into
consideration the clearances necessary
to replace the air filter or perform other
routine maintenance.

2

Table 1: Clearance to Combustibles

Furnace P2LBX P3DHX12F08001 P2DHX16F12001

Location Upflow Downflow Horizontal Downflow Horizontal

Top 3 in. 0 in. 6 in. 0 in. 3 in.

Bottom 0 in. 0 in. 1 in. 1 in. 1 in.

S/A

Plenum

0 in. 1 in. 1 in. 1 in. 3 in.

Rear 1 in.1 1 in. 1 in. 1 in. 1 in

Sides 6 in.2 1 in. 1 in. 1 in. 0 in.

Front 24 in. 6 in.1 24 in. 16 in.1 24 in.

Flue Pipe 9 in.3 9 in.3 9 in.3 9 in.3 9 in.3

Enclosure Standard Closet - - - Closet Alcove

1 24 inches is required for servicing.

2

18 inches is required on one side as service access to rear.

3

18 inches required in some U.S. jurisdictions

DOWN-FLOW INSTALLATION

All P*DHX furnace models have been
assembled for installation in the down­flow position. Maintain all clearances to
combustibles as outlined in Table 1.
P*DHX models have available sub-bases
for installations on combustible floors.
The sub-bases provide a means of effec­tively mating the supply air plenum with
the furnace, and providing the necessary
one-inch clearance to combustibles
around the supply air plenum.

Fig. 1: Typical Suspended Application

HORIZONTAL INSTALLATION

P*DHX furnaces models may be in­stalled in either of the horizontal posi­tions; warm air discharging left or warm
air-discharging right by following these
steps:

1. Rotate the furnace 90° to the de­sired position.

2. Remove the three nut and washer
sets fastening the oil burner assem­bly to the furnace. Rotate the oil
burner assembly to be in the normal
upright position.

3. Re-align the oil burner assembly to
the combustion chamber (fire-pot),
and then secure into place with the
three nut and washer sets.

IMPORTANT: Model P3DHX12F08001

has an auxiliary limit control that must be
in the upper position. Be sure that the
auxiliary limit control is above the oil

burner assembly.

NON-SUSPENDED INSTALLATION

Maintain clearances to combustibles as
outlined in Table 1. Installation on a
combustible floor requires a clearance of
1 inch. This can be done by using a non­combustible material such as one inch
thick channel iron or similar material. The
furnace must be supported in such a way
as to not allow twisting or sagging of the
cabinet. Suggestion; as a measure to
prevent fuel oil from accumulating in
locations other than the fire pot, as could
be the case in the event of nozzle drip,
install the furnace with an approximate 2
degree slope from the oil burner casing
towards the fire pot. Use shims made of
noncombustible material.

3

SUSPENDED INSTALLATION

Refer to Figure 1. Maintain clearances to
combustibles as outlined in Table 1. The
furnace may be suspended by field fabri­cating a cradle of angle iron and
threaded rod. Secure the furnace with 2
inch minimum slotted angle or equiva­lent, as shown in Figure 1. The furnace
must be supported in such a way as to
not allow twisting or sagging of the cabi­net. Position the supports so as to not
interfere with accessing the burner and
blower compartments. Suggestion; as a
measure to prevent fuel oil from accumu­lating in locations other than the fire pot,
as could be the case in the event of noz­zle drip, install the furnace with an ap­proximate 2 degree slope from the oil
burner casing towards the fire pot.

AIR CONDITIONING

If the furnace is used in conjunction with
air conditioning, the furnace shall be
installed in parallel with or upstream from
the evaporator coil to avoid condensation
in the heat exchanger. In a parallel
installation, the dampers or air controlling
means must prevent chilled air from en­tering the furnace. If the dampers are
manually operated, there must be a
means of control to prevent the operation
of either system unless the dampers are
in the full heat or full cool position. The
air heated by the furnace shall not pass
through a refrigeration unit unless the
unit is specifically approved for such
service.

Generally, a six-inch clearance between
the air conditioning evaporator coil and
the heat exchanger will provide adequate
airflow through the evaporator coil.

The blower speed must be checked and
adjusted to compensate for the pressure
drop caused by the evaporator coil. Re­fer to Appendix B for recommended wir­ing and electrical connections of the air
conditioning controls.

COMBUSTION AIR

When a furnace is installed in the full
basement of a typical frame or brick
house, infiltration is normally adequate to
provide air for combustion and draft op­eration. If the furnace is installed in a
closet or utility room, two (2) ventilation
openings must be provided connecting to
a well ventilated space (full basement,
living room or other room opening
thereto, but not a bedroom or bathroom).
One opening shall be located 6" from the
top and bottom of the enclosure at the
front of the furnace. For furnaces located
in buildings of unusually tight construc-

4

tion, such as those with high quality
weather stripping, caulking, windows and
doors, or storm sashed windows, or
where basement windows are well
sealed, a permanent opening communi­cating with a well ventilated attic or with
the outdoors shall be provided, using a
duct if necessary. Size all of the open­ings and associated ductwork by the
standards provided in the latest Oil In­stallation Code editions; NFPA 31 in the
United States, CAN/CSA B139 in Can­ada. Take all fuel burning appliances in
the area into consideration when calcu­lating combustion and ventilation air re­quirements.

The Model CAS-2B-90E Furnace Boot
manufactured by Field Controls, Inc. may
be used with the furnace to obtain com­bustion air directly from outdoors. Use of
this device does not alter the need for
ventilation air; however, it does provide a
good direct source of combustion air and
is connected directly to the oil burner.

CHIMNEY VENTING

The chimney must be sized correctly and
be in good repair. If the chimney is over­sized, there is a high risk of the flue
gases condensing resulting in damage to
the chimney and other venting parts.
This problem may be corrected by the
use of an appropriately sized chimney
liner.

If the chimney serves the
P3DHX12F08001 furnace only, the vent
should be sized at 4-inch minimum, 5­inch maximum. If the chimney serves the
P2DHX16F12001 or P2LBX16F14501
furnace only, the vent should be sized at
4-inch minimum, 6-inch maximum. If the
chimney serves the P4LBX20F19001
furnace only, the vent should be sized at
5-inch minimum, 7-inch maximum. The
data provided in Table 3 is based on
dedicated venting. If the furnace is to be
co-vented with other appliances, refer to

NFPA 211, Standard for Chimneys, Fire-

places, Vents, and Solid Fuel-Burning
Appliances, NFPA 31, Standard for the
Installation of Oil Burning Equipment or
CAN/CSA B139, Installation Code For
Oil Burning Equipment for correct sizing

information.

NOTE: This furnace is approved for
use with L-Vent.

NOTE: Maximum temperature for L­Vent is 575°F (300°C).

IMPORTANT: The chimney must be

capable of providing sufficient draft at all
times for the safe removal of the prod­ucts of combustion.

The chimney should be tested under
“winter” conditions; doors and windows
closed, all other fossil fuel burning appli­ances on, clothes dryer on, bathroom
fans on, etc. If the chimney cannot over­come the competition for air, it will be
necessary to access the reason for it,
and take corrective action. If the chimney
is found to be sized correctly and in good
repair, it will probably be necessary to re­evaluate the availability of combustion
and ventilation air, and take corrective
action.

The flue pipe should be as short as pos­sible with horizontal pipes sloping up­ward toward the chimney at a rate of
one-quarter inch to the foot. The flue
pipe should not be smaller in cross sec­tional area than the flue collar on the
furnace. The flue pipe may be reduced in
size to fit a smaller diameter chimney
with the use of a tapered reducer fitting
at the chimney inlet. The flue pipe should
connect to the chimney such that the flue
pipe extends into, and terminates flush
with the inside surface of the chimney
liner. Seal the joint between the pipe and
the lining. The chimney outlet should be
at least two feet above the highest point
of a 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.

See Figure 2 and Table 2 for common
chimney problems and their remedies.

THE FURNACE MUST BE CON­NECTED TO A FLUE HAVING SUFFI­CIENT DRAFT AT ALL TIMES TO EN­SURE SAFE AND PROPER OPERA­TION OF THE APPLIANCE.

The flue pipe must not be routed through
concealed space, because it must be
visually checked for signs of deteriora­tion during the annual inspection and
servicing. The flue pipe must not pass
through any floor or ceiling, but may
pass through a wall where suitable fire
protection provisions have been in­stalled. In the United States, refer to the
latest edition of NFPA 31 for regulations
governing the installation of oil burning
equipment. In Canada, refer to the latest
edition of CAN/CSA B139 for rules gov­erning the installation of oil burning
equipment.

Fig. 2: Common Chimney Problems

Table 2: Common Chimney Problems

Refer to Figure 2

Key Trouble Diagnostic Remedy

Top of chimney
lower than sur-

A

rounding ob­jects

Chimney Cap

B

or ventilator.

Coping restricts

C

opening.

Observation

Observation Remove

Observation

Extend chimney
above all sur­rounding ob­jects within 30
feet.

Make opening
as large as
inside of chim­ney.

Obstruction in
chimney

D

Joist protruding

E

into chimney.

Break in chim-

F

ney lining.

Collection of
soot at narrow

G

space in flue
opening.

H Offset

Two or more

I

openings to the
same chimney.

Loose-seated

J

pipe in flue
opening.

Smoke pipe

K

extends into
chimney.

Failure to ex­tend the length

L

of flue partition
to the floor.

Loose-fitted

M

clean-out door.

DRAFT REGULATOR CONTROL

This device is used in conjunction with conventional chimney
venting. This control (or draft regulator) automatically maintains
a constant negative pressure in the furnace to obtain maximum
efficiency. It ensures that proper pressures are not exceeded. If
the chimney does not develop sufficient draft, the draft control
cannot function properly. The draft regulator, must be installed
within the same room or enclosure as the furnace, and should
not interfere with the combustion air supplied to the burner. The
control should be located a minimum of 3 flue pipe diameters
from the furnace breeching and installed in accordance to the
instructions supplied with the regulator.

Can be found
by light and
mirror reflecting
conditions in
chimney.

Lowering a light
on an extension
cord.

Smoke test ­build smudge
fire blocking off
other opening,
watching for
smoke to es­cape.

Lower light on
extension cord.

Lower light on
extension cord.

Found by in­spection from
basement.

Smoke test.

Measurement
of pipe from
within or obser­vation of pipe
by means of a
lowered light.

By inspection or
smoke test.

Smoke test.

Use weight to
break and dis­lodge.

Must be han­dled by compe­tent masonry
contractor.

Must be han­dled by compe­tent masonry
contractor.

Clean out with
weighted brush
or bag of loose
gravel on end
of line.

Change to
straight or to
long offset.

The least im­portant opening
must be closed,
using some
other chimney
flue.

Leaks should
be eliminated
by cementing
all pipe open­ings.

Length of pipe
must be re­duced to allow
end of pipe to
be flush with
inside of tile.

Extend partition
to floor level.

Close all leaks
with cement.

5

Table 3: Minimum Chimney Base

Temperatures (°F)

Nozzle

Chimney Height (ft.)

11 20 28 36

Chimney Thermal Resistance < R6

0.50 300 400 535 725

0.65 275 340 430 535

0.75 260 320 380 475

0.85 250 300 355 430

1.00 245 300 355 430

1.10 245 290 345 400

1.20 240 275 320 365

1.50 240 275 320 365

1.65 235 270 300 345

Nozzle

Chimney Height (ft.)

11 20 28 36

Chimney Thermal Resistance > R6

0.50 185 200 220 250

0.65 175 185 205 220

0.75 175 185 195 210

0.85 165 185 195 205

1.00 165 185 195 205

1.10 165 185 195 205

1.20 165 180 190 200

1.50 165 175 185 195

1.65 165 175 180 190

< -

less than

, > -

greater than

OIL TANK

Oil storage tanks must be selected and
installed in compliance with applicable
codes; in the United States, NFPA 31,

Standard for the Installation of Oil Burn­ing Equipment, Chapter 2. and in Can-
ada, CAN/CSA-B139, Installation Code
for Oil Burning Equipment, Section 6.

Observe all local codes and by-laws.

In general, the oil tank must be properly
supported and remain stable in both
empty and full condition. The oil tank
must be fitted with vent and supply pipes
to the outdoors. Refer to the above­mentioned codes for sizing. The vent
pipe must be no less than 1¼ inches
I.P.S., and terminate with an appropriate
vent cap in a location where it will not be
blocked. The fill pipe must be no less
than 2 inches I.P.S., and terminate with
an appropriate cap in a location where
debris will not enter the fill pipe during oil
delivery.

If located indoors, the tank should nor­mally be in the lowest level, (cellar,
basement, etc.). It must be equipped
with a shut-off valve at the tank outlet
used for the oil supply. The oil tank must
be located as to not block the furnace /
room exit pathway. Observe all clear­ances specified in the above-mentioned
codes.

PIPING INSTALLATION

In the United States, NFPA 31, Standard
for the Installation of Oil Burning Equip­ment, Chapter 2.

In Canada, the entire fuel system should
be installed in accordance with the re­quirements of CAN/CSA B139, and local
regulations. Use only approved fuel oil
tanks piping, fittings and oil filters.

Ensure that all fittings used in a copper
oil line system are high quality flare fit­tings. Do not use compression fittings.

Do not use Teflon tape on any fittings.

Pressurized or gravity feed installations
must not exceed 3 PSIG. Pressures
greater than 10 PSIG may cause dam­age to the shaft seal. If the height of the
oil stored in a tank above the oil burner
exceeds 11½ feet, it may be necessary
to use a pressure-regulating device ap­proved for this purpose.

The furnace may be installed with a one­pipe system with gravity feed or lift. The
maximum allowable lift on a single line
system is 8 feet. Lift should be measured
from the bottom (outlet) of the tank, to
the inlet of the burner. Sizing a single
line system is complex because of the
difficulty estimating the pressure drop
through each fitting, bend and compo­nent in the line. In general, keep single
line systems short as possible. 2-stage
oil pumps are not available for either the
P*HMX or P*LBX furnaces. The following
chart shows the allowable line lengths
(horizontal + vertical) for single and two­line oil piping systems. All distances are
in feet.

Table 4: Oil Lines

Copper Tubing Oil Line Length (Feet)

Lift

(Feet)

0 53 100 68 100

1 49 100 65 100

2 45 100 63 100

3 41 100 60 100

4 37 100 58 100

Single-Pipe Two-Pipe

⅜”

OD

½” OD

⅜”

OD

½” OD

Continue

5 33 100 55 100

6 29 100 53 100

7 25 99 50 100

8 21 83 48 100

9 17 68 45 100

10 13 52 42 100

12 - - - - - - 37 100

14 - - - - - - 32 100

16 - - - - - - 27 100

18 - - - - - - 22 88

In retrofit applications, where an existing
oil line system is in place, a vacuum
check will help determine the efficacy of
the existing oil line system The vacuum
in a system should not exceed 6” Hg. for
a single pipe system, nor 12” Hg. for a
two-pipe system.

NOTE: The oil burner requires the use of

a bypass plug when converting from
single-pipe to two-pipe oil piping sys­tems. See burner manufacturer’s instruc­tions.

All fuel systems should include an oil
filter between the fuel oil storage tank
and the oil burner. For best results, in­stall the oil filter as close to the burner as
possible. When using an indoor oil tank,
the oil filter may be installed at the tank
downstream from the shut-off valve. If
firing the furnace under the 0.65 gph
rate, a 7 to 10 micron line filter should be
installed as close to the oil burner as
possible.

ELECTRICAL CONNECTIONS

The furnace is listed by the Canadian
Standards Association (CSA). All models
except for the P4LBX20F19001 are fac­tory wired and require minimal field wir­ing. The P4LBX20F19001 model is pre­wired except for the wiring connections
to the blower motor. The wires from the
furnace section are routed through the
grommet in the blower section blower
division panel, and then connected to the
blower motor. In the United States, the
wiring must be in accordance with the
National Fire Protection Association
NFPA-70, National Electrical Code, and
with local codes and regulations. In Can­ada, all field wiring should conform to
CAN/CSA C22.1 Canadian Electrical
Code, Part 1, and by local codes, where
they prevail.

The furnace should be wired to a sepa­rate and dedicated circuit in the main
electrical panel; however, accessory
equipment such as electronic air clean-

6

ers and humidifiers may be included on
the furnace circuit. Although a suitably
located circuit breaker can be used as a
service switch, a separate service switch
is advisable. The service switch is nec­essary if reaching the circuit breaker
involves becoming close to the furnace,
or if the furnace is located between the
circuit breaker and the means of entry to
the furnace room. The furnace switch
(service switch) should be clearly
marked, installed in an easily accessible
area between the furnace and furnace
room entry, and be located in such a
manner to reduce the likelihood that it
would be mistaken as a light switch or
similar device.

The power requirements for all models:

120 VAC, 1 ∅, 60 Hz.

Maximum fuse size for the P*DHX mod­els and P2LBX16F14501 model: 15
amps. Maximum fuse size for the
P4LBX20F19001 model: 20 amps.

Accessories requiring 120 VAC power
sources such as electronic air cleaners
and humidifier transformers may be
powered from the furnace circuit. Do not
use the direct drive motor connections as
a power source, since there is a high risk
of damaging the accessories by expo­sure to high voltage from the auto­generating windings of the direct drive
motor.

Thermostat wiring connections and air
conditioning contactor low voltage con­nections are shown in the wiring dia­grams. Some micro-electronic thermo­stats require additional controls and wir­ing. Refer to the thermostat manufac­turer's instructions.

The thermostat should be located ap­proximately 5 feet above the floor, on an
inside wall where there is good natural
air circulation, and where the thermostat
will be exposed to average room tem­peratures. Avoid locations where the
thermostat will be exposed to cold drafts,
heat from nearby lamps and appliances,
exposure to sunlight, heat from inside
wall stacks, etc.

Normal heat anticipator setting: for the
P*LBX models is 0.1 A. Normal heat
anticipator setting: for the P*DHX models
is 0.4 A .For more precise adjustment,
the heat anticipator may be adjusted to
the amperage draw of the heating control
circuit as measured between the "R" and
"W" terminals of the thermostat. To re­duce the risk of damaging the heat an­ticipator, do not measure circuit without
first removing one of the two wires first.

To determine the heating circuit amper­age draw:

1. Disconnect one of the “R” or “W”
wires from the thermostat terminal.

2. Connect an ammeter between the
wire and the thermostat terminal to
which it was attached.

3. Note the amperage reading when
the heating contacts are closed.

HEAT

(System switch must be on “

” if

so equipped.

4. Re-connect the thermostat wire. If
the thermostat is serving a combina­tion heating and air conditioning sys­tem, pay particular attention to
polarity.

5. When the thermostat is reconnected
and re-plumbed, adjust the heat an­ticipator setting to match the ob­served amperage reading.

CIRCULATING AIR BLOWER

Both P*DHX and the P2LBX16F14501
furnace models are equipped with a di­rect drive blower system. Direct drive
blower speed adjustments are not nor­mally required in properly sized extended
plenum duct systems. The motor RPM
and air CFM delivery will vary automati­cally to accommodate conditions within
the usual range of external static pres­sures typical of residential duct systems.
Under-sized duct systems may require a
higher blower speed to obtain a reason­able system temperature rise. Some
older duct systems were not designed to
provide static pressure. They typically
feature special reducing fittings at each
branch run and lack block ends on the
trunk ducts. These systems may require
modification to provide some resistance
to the airflow to prevent over- amping of
the direct drive blower motor. Selecting a
lower blower speed may correct this
problem.

Direct drive blower speeds are adjusted
by changing the "hot" wires to the motor
winding connections. Please refer to
wiring diagram in Appendix B or the wir­ing diagram label affixed to the furnace.

THE NEUTRAL WIRE (normally the
white wire) IS NEVER MOVED TO AD­JUST THE BLOWER SPEED.

DO NOT CONNECT POWER LEADS
BETWEEN MOTOR SPEEDS. THE
NEUTRAL WIRE MUST ALWAYS BE
CONNECTED TO THE MOTOR'S DES­IGNATED NEUTRAL TERMINAL.

It is possible and acceptable to use a
single blower speed for both heating and
cooling modes. The simplest method to
connect the wiring from both modes is to
use a "piggy-back connector" accommo­dating both wires on a single motor tap.
It is also acceptable to connect the se­lected motor speed with a pigtail joined
to both heating and cooling speed wires
with a wire nut. As a safety precaution
against accidental disconnection of the
wires by vibration, it is advisable to se­cure the wire nut and wires with a few
wraps of electricians tape.

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

The P4LBX20F19001 furnace model is
equipped with a belt drive blower sys­tem. The blower speed (RPM) and resul­tant airflow can be varied by adjusting
the variable speed motor pulley.

DISCONNECT THE POWER SUPPLY
TO THE FURNACE BEFORE OPEN­ING THE BLOWER ACCESS DOOR
TO SERVICE THE AIR FILTER, FAN
AND MOTOR. FAILURE TO SHUT OFF
POWER COULD ALLOW THE
BLOWER TO START UNEXPECT­EDLY, CREATING A RISK OF DEATH
OR PERSONAL INJURY.

Do not use the blower speed wires as
a source of power to accessories as
electronic air cleaners and humidifier
transformers. The unused motor taps
auto-generate sufficiently high volt­ages to damage accessory equip­ment.

Do not start the burner or blower fan
unless the blower access door is se­curely in place.

7

OIL BURNER

P*LBX furnaces are equipped with
Beckett AF Series oil burners with the
Beckett CleanCut pump and R7184B oil
primary control. P*DHX furnaces are
equipped with Beckett AF Series oil
burners with the R8184N oil primary con­trol. The oil burner must align properly
with the cerafelt fiber chamber (firepot).
The cerafelt fiber chamber is initially
quite soft, but hardens and becomes
quite brittle after the first firing. The fire­pot is held in place by a retaining
bracket; however, it is possible for the
firepot to shift if subjected to rough han­dling during transit.

BEFORE OPERATING THE FUR­NACE CHECK BURNER ALIGNMENT
WITH COMBUSTION CHAMBER.
THE END CONE OF THE AIR TUBE
MUST BE CENTRED TO THE AC­COMODATING RING PROVIDED IN
THE DESIGN OF THE COMBUSTION
CHAMBER. ADJUST ALIGNMENT AS
NECESSARY BEFORE THE FIRST
FIRING.

OIL BURNER NOZZLES

All furnace models are certified for multi­ple firing rates. Choose the firing rate
that most closely matches the calculated
heat loss of the building. Models, firing
rates and nozzles are listed in Appendix
A: AF Burner Set-Up.

Fig. 4: Horizontal Smoke Test Port Location Fig. 5: Vertical Smoke Test Port Location

BURNER ELECTRODES

Correct positioning of the electrode tips
with respect to each other, to the fuel oil
nozzle, and to the rest of the burners is
essential for smooth light ups and proper
operation. The electrode tips should be
adjusted to a gap of 5/32”, 1/16” ahead
of the nozzle, 5/16” above the centerline
of the nozzle. The “Z” dimension (front
edge of the burner head to the front face
of the nozzle is 1-1/8 inches.

Electrode positioning should be checked
before the first firing of the furnace.

The electrode porcelains should be free
of cracks, the electrode tips should be
tapered and free of burrs, and the con­tact rods must be clean and be in firm
contact with the ignition transformer con­tact springs. The electrodes must not
come into contact with the burner head.

OIL BURNER SET-UP

The burner air supply is adjusted to

maintain the fuel to air ratio to obtain

ideal combustion conditions. A lack of air
causes "soft" and "sooty" flames, result­ing in soot build-up throughout the heat
exchanger passages. Excess combus­tion air causes a bright roaring fire and
high stack temperatures resulting in poor
fuel efficiency.

PREPARATIONS:

Drill a ¼” test port in the venting, ideally
at least 2 flue pipe diameters away from
the furnace breeching, if venting horizon­tally from the furnace, (typically P*LBX)
or from the flue pipe elbow if venting
vertically (typically P*DHX) before reach­ing the furnace. (see Figures 4 and 5).

The test port will allow flue gas samples
to be taken and stack temperatures to be
measured.

Before starting the burner, check the
burner alignment with the combustion
chamber (fire pot), check that the correct
nozzle is tightened into place, and that
the burner electrodes are properly posi­tioned.

The Beckett burner bulk air band should
be closed, and the air shutter initial set­ting should be approximately 7.00.

Note A: Locate hole at least 6 inches on

the furnace side of the draft control.

Note B: Ideally, hole should be at least

12 inches from breeching or elbow.

PROCEDURE:

Start the burner and allow it to run at
least ten minutes. Set the air shutter to
give a good flame visually. The combus­tion air supply to the burner is controlled
by adjusting the air shutter on the left
side of the burner, and, if necessary, the
bulk air band. To adjust, loosen the bolt
on the movable shutter. Move the shutter
gradually until a good flame (visually)
has been achieved. Re-snug the bolt.

Check the initial draft setting as the fur­nace warms up. The draft may be meas­ured at the test port. The final breech
draft should be - 0.02 inches w.c. to
provide adequate over-fire draft.

8

Check the oil pump pressure. Standard
operating pressure is 100 PSIG.

After reaching steady state, take a
smoke test. If not indicating a trace, set
the combustion air controls to provide a
trace.

Typically, the CO

reading will range

2

from 11.5% to 13.5%.

After the air adjustments have been
completed, and the air shutter or air ad­justment plate has been secured, re­check the breech draft and take another
smoke test to ensure that the values
have not changed.

SMOKE TEST NOTE:

If oily or yellow smoke spots are found
on the smoke test filter paper, it is usu­ally a sign of unburned fuel. This indi­cates poor combustion. This type of
problem may be caused by excess draft,
excess air, or contaminated fuel. Do not
ignore this indicator.

STACK TEMPERATURE:

Stack temperature will vary depending
on fuel input, circulating air blower
speed, and burner set up, etc. In gen­eral, stack temperature should typically
range between 380°F to 550°F, assum­ing that the combustion air is approxi­mately room temperature (65°F - 70°F).
In general, lower stack temperature indi­cates greater efficiency; however, ex­cessively low stack temperature can lead
to condensation forming in the chimney
and / or venting. Sulphur and similar
contaminants in the fuel oil will mix with
condensation to form acids. Acids and
resultant chemical salts will cause rapid
deterioration of the chimney and venting
components, and may attack the fur­nace.

If the flue gases are below the range, it
may be necessary to slow down the
blower fan. If the flue gases are above
the range, the blower fan may require
speeding up. Stack temperature varies
directly with the system temperature rise.
System temperature rise is the difference
between the furnace outlet temperature
and furnace inlet temperature as meas­ured in the vicinity of the connection be­tween the plenum take-offs and the trunk
ducts. Typical temperature rise values
range between 70°F and 85°F.

If the venting from the furnace to the
chimney is long, or exposed to cold am­bient temperatures, it may be necessary
to use L-Vent as the vent connector to
reduce stack temperature loss to prevent
condensation. The venting should be
inspected annually to ensure that it is
intact.

9

FURNACE INSTALLATION
SET-UP

The furnace must be set up as the final
step in the installation.

A) The oil burner must be set up follow­ing the procedures outlined above.

B) The furnace should operate within a
temperature rise of 85°F ±15°F. To de­termine the temperature rise, measure
the supply air and return air tempera­tures when the furnace has reached
steady state conditions. This is the point
at which the supply air temperature stops
increasing relative to the return air tem­perature. The furnace may have to run
10 to 15 minutes to reach steady state
conditions. The measurements may be
made with duct thermometers or thermo­couples used in conjunction with multi­meters with temperature measurement
capabilities.

The return air should be measured at a
point where the thermometer will be well
within the air stream near the furnace
return air inlet. Actual location is not par­ticularly critical; however, avoid locations
where the temperature readings could be
affected by humidifier bypass ducts, the
inside radius of elbows, etc.

The supply air temperature should be
measured at a point where the ther­mometer will be well within the air stream
near the furnace supply air outlet. Usu­ally, the side mid-point of the supply air
plenum take-off is ideal, providing it is
out of the line of sight to the heat ex­changer. If the thermometer is within the
line of sight of the heat exchanger, the
supply air readings may be skewed by
radiant heat from the heat exchanger. If
the plenum take-off is unsuitable, the
supply air temperature may be measured
within the first 18 inches of the first seg­ment of supply air trunk duct.

If the temperature rise is outside the rec­ommended range, it may be adjusted on
direct drive equipped units by selecting
alternate circulation fan motor speeds,
on belt drive equipped units by adjusting
the variable speed motor pulley. If the
temperature rise is too high, speed the
fan up. If the temperature rise is too low,
slow the fan down.

C) Keep in mind that the stack tem­perature varies directly with the tempera­ture rise. The higher the temperature
rise, the higher the stack temperature will
be, resulting in lower efficiency. The
lower the temperature rise, the lower the
stack temperature will be, which, in some
cases, may allow condensation to form
in the chimney and other vent parts.

D) Test the high limit control to ensure
that it is operating correctly. For direct
drive equipped units, this may be done
by temporarily removing the circulator
fan heating wire or neutral wire. For belt
drive equipped units, temporarily remove
the fan belt. Turn of electrical power to
the furnace before working with the mo­tor wires or fan belt. Be sure to protect
any removed wires from shorting out on
metal furnace parts. If the high limit test
is successful, shut off the electrical
power to the furnace, restore the proper
motor wiring. Finally, restore power to
the furnace.

E) Adjust the “Fan Off” setting on the
L6064A or L4064W fan limit controller. In
most cases, the “Fan Off” temperature
should be 90° to 100°F as indicated on
the thermometer used to measure the
supply air temperature. Once the “Fan
Off” setting has been established, set the
“Fan On” setting. In most cases, the “Fan
On” setting should be approximately
30°F higher than the Fan Off” setting.

NOTE: The L4064W fan/limit controller
has an auxiliary “fan on” function that
activates when the thermostat is calling
for heat. The controller is designed to
start the circulating fan in 20 to 30 sec­onds. Adjust the “fan on” setting on the
controller dial 30°F higher than the “fan
off” setting even though the circulating
fan will normally be started by the auxil­iary “fan on” function.

F) Operate the furnace through a
minimum of three full heating cycles.
During this time, check for fuel oil leaks,
gross air leakage from the supply air
ductwork, unusual noises originating
anywhere within the heating system
which may cause some concern or an­noyance to the home owner, etc.

G) Be sure that the homeowner is
familiar with the furnace. The
homeowner should be aware of the
location of electrical circuit breaker or
fuse, the location of any electrical
switches controlling the furnace, the
location of the oil tank shut-off valve and
how to operate the valve. The home­owner should be informed where the oil
tank gauge is located and how to read it.

It would be beneficial to review safety
issues with the home owner, such as the
danger of storing combustibles too close
to the furnace, hanging anything on the
furnace vent pipe, and especially the
dangers of indiscriminately pressing the
burner reset button.

IMPORTANT: Be sure that the home

owner knows where the burner reset
switch is located, and is aware that the
reset switch is not to be activated more
than once without a thorough look for the
cause of the problem, (lack of fuel, etc.).
Be sure that the homeowner knows
when to quit trying to start the furnace
during these conditions and who to call
for emergency service.

MAINTENANCE AND SERVICE

A: Routine Maintenance By Home
Owner

Other than remembering to arrange for
the annual professional servicing of the
furnace by the service or installation con­tractor, the most important routine ser­vice performed by the homeowner is to
maintain the air filter or filters. A dirty
filter can cause the furnace to over-heat,
fail to maintain indoor temperature during
cold weather, increase fuel consumption
and cause component failure.

The furnace filter(s) should be inspected,
cleaned or replaced monthly. The fur­nace is factory equipped with a semi­permanent type filter. If the filter is dam­aged, replace with filters of the same
size and type.

During the routine service, inspect the
general condition of the furnace watching
for signs of oil leaks in the vicinity of the
oil burner, soot forming on any external
part of the furnace, soot forming around
the joints in the vent pipe, etc. If any of
these conditions are present, please
advice your service or installation con­tractor.

B: Annual Service By Contractor

A wire brush can be used to loosen dirt
and debris on the inside surfaces of the
radiator. Clean out all accumulated dirt,
soot and debris with a wire handled
brush and an industrial vacuum cleaner.
Replace the clean-out yoke assemblies
and clean-out covers.

Most circulating fan motors are perma­nently lubricated by the motor manufac­turer. These motors will have no oil
ports. If the blower motor does contain
oil ports, under normal operating condi­tions it will not require oiling for the first
two years. Oil sparingly; a few drops in
each oil port with SAE 20 non-detergent
oil. Oiling is most easily done with a
"tele-spout" oiler. This oiler has a long
flexible plastic spout. DO NOT OVER­LUBRICATE. Excess oil may result in
premature electric motor failure.

Inspect the blower fan. Clean it if neces­sary.

Oil Burner Maintenance: Follow the in­structions of the oil burner manufacturer.
(See oil burner manufacturer's instruc­tions supplied with furnace). The oil
burner nozzle should be replaced annu­ally. We recommend that the oil filter be
changed on an annual basis.

The venting system should be cleaned
and inspected for signs of deterioration.
Replace pitted or perforated vent pipe
and fittings. The barometric draft regula­tor should open and close freely.

All electrical connections should be
checked to ensure tight connections.
Safety controls such as the high limit
controls should be tested for functional­ity. The fan control functions should be
checked to ensure that all fan speeds
are operating properly.

After the furnace warms sufficiently, the
circulation fan will start.

The furnace will continue to run until the
thermostat call for heat is satisfied.

Set the thermostat below room tempera­ture. The oil burner will stop.

The air circulation blower will continue to
run until the furnace has cooled suffi­ciently.

To Shut Down Unit

Set the thermostat to the lowest possible
setting. Set the manual switch (if in­stalled) in the Electrical Power Supply
Line to "OFF".

NOTE: If the furnace is to be shut down

for an extended period of time, close the
oil supply valve to the oil burner.

DO NOT ATTEMPT TO START THE
BURNER WHEN EXCESS OIL HAS
ACCUMULATED, WHEN THE FUR­NACE IS FULL OF VAPOUR, OR
WHEN THE COMBUSTION CHAMBER
IS VERY HOT. NEVER BURN GAR­BAGE OR PAPER IN THE FURNACE,
AND NEVER LEAVE PAPER OR RAGS
AROUND THE UNIT.

THE Combustion chamber (firepot) IS
FRAGILE. use care when inspecting
and cleaning this area.

The heat exchanger should be inspected
periodically and cleaned if necessary. if

cleaning is necessary, SHUT OFF
POWER TO THE FURNACE and re-

move the burner. Using a stiff brush with
a wire handle, brush off scale and soot
from inside the drum and flue pipe. To
clean the heat exchanger radiator, re­move the covers on the front or inner
front panel, and then loosen the brass
nuts on the radiator clean-out yoke as­sembly. Do not remove the brass nuts.
The yoke assembly, once loosened, may
be removed to gain access to the heat
exchanger outer radiator.

10

OPERATING INSTRUCTIONS

Before Lighting

Open all supply and return air registers
and grilles.

Open all valves in oil pipes.

Turn on electric power supply.

To Light Unit

Set the thermostat above room tempera­ture to call for heat. The burner will start.
NOTE: If the furnace has been off for an
extended period of time, it may be nec­essary to press the RESET button on the
primary combustion control relay, (once
only). If pressing the reset button does
not start the furnace, refer to Appendix
C, Troubleshooting.

TABLE A-1: BECKETT OIL BURNER SET-UP

FURNACE

MODEL

P3DHX12F08001

P2DHX16F12001

OUTPUT

BTU/Hr.

60,000 3 AF76BNHS 0.50 / 80°A 100 PSIG 0.50 GPH F3 1 3-3/8 in.

78,000 2 AF76BNHS 0.65 / 80°A 100 PSIG 0.65 GPH F3 1 3-3/8 in.

90,000 AF76BNHS 0.75 / 80°A 100 PSIG 0.75 GPH F3

91,000 AF76XN 0.75 / 80°A 100 PSIG 0.75 GPH F3 2-3/4 in.

101,000 AF76XN 0.85 / 80°A 100 PSIG 0.85 GPH F3 2-3/4 in.

117,000 2 AF76XN 1.00 / 60°A 100 PSIG 1.00 GPH F3 2-3/4 in.

128,000 AF76YB 1.10 / 70°A 100 PSIG 1.10 GPH F6 2-3/4 in.

BURNER

MODEL

BECKETT AF SERIES OIL BURNERS

NOZZLE

(Delavan)

PUMP

PRESSURE

FLOW

RATE

HEAD

1

3-3/8 in.

STATIC

PLATE

P2LBX16F14501

143,000

2

AF65YB 1.20 / 60°A 100 PSIG 1.20 GPH F6 2-3/4 in.

168,000 AF81WF 1.50 / 70°B 100 PSIG 1.50 GPH F16 2-3/4 in.

130,000 AF65YB 1.10 / 70°A 100 PSIG 1.10 GPH F6 2-3/4 in.

P4LBX20F19001

1

Used with ceramic insulator.

2

Factory supplied nozzle.

3

Requires a low firing rate baffle.

188,000

2

AF81WF 1.65 / 70°B 100 PSIG 1.65 GPH F16 2-3/4 in.

In the United States, the R. W. Beckett “AF” Burner may be equipped with Beckett’s “Inlet Air Shut-Off”, Beckett Part No. AF/A 5861, to increase efficiency. It reduces the
amount of air passing through the oil burner, combustion chamber, breeching, etc. up the chimney between burner cycles.

NOTE: THE USE OF THIS CONTROL CAN OCCASIONALLY CAUSE POST COMBUSTION NOZZLE DRIP.

11

TABLE A-2: DIRECT DRIVE BLOWER SET-UP

FURNACE

P3DHX12F08001

P2DHX16F12001

OUTPUT

BTU/Hr.

BLOWER

60,000 Low Med-Low 615 - 790

78,000 Med-Low Med-High 799 - 1027

GT10 DD 1/2

90,000

91,000 Med-Low Med-High 932 - 1199

101,000 Med-Low Med-High 1035 - 1330

117,000 Med-High High 1198 - 1540

GT12-10 DD 1/2

128,000

MOTOR

HP

BLOWER SET-UP COOLING CAPACITY

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

Htg. CFM

Range

1

Med-High High 922 - 1185

Med-High High 1311 - 1685

Tons

2

MOTOR

HP

Clg. CFM

Range

3 1/2 690 - 1200

4 1/2 1000 - 1600

P2LBX16F14501

(1)

Heating Range values based on temperature rise. Upper values may exceed measured airflow values in Table A-3.

(2)

Nominal values only.

130,000 High High 1332 - 1712

143,000

G10 DD 1/2

High High 1465 - 1883

TABLE A-3: BELT DRIVE BLOWER SET-UP

Blower Set-Up Cooling Capacity

Furnace

Model

Blower Motor

P4LBX20F19001 G12 3/4 HP

Motor Blower Motor Blower

3½ x ⅝

3½ x

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

Pulley Belt Pulley Belt

⅝

7 x ¾ 4L430

7 x ¾ 4L430

3½ x ⅝

3½ x ⅝

4 1/2 1065 - 1600

Tons CFM Range

7 x ¾ 4L430

4 1300 - 1535

7 x ¾ 4L430

12

TABLE A-4: DIRECT DRIVE BLOWER CHARACTERISTICS

FURNACE

MODEL

P3DHX12F08001 GT10 ½ 7.7 70° - 90°F

P2DHX16F12001 G12-10 1/2 7.7 70° - 90°F

P2LBX16F14501 G10 1/2 7.7 70° - 90°F

BLOWER

MOTOR

HP

MOTOR

FLA

TEMP.

RISE

(∆∆∆∆T)

TABLE A-5: BELT DRIVE BLOWER CHARACTERISTICS

CFM

SPEED

0.20 0.30 0.40 0.50 0.60

High 1469 1386 1308 1213 1123

Med-High 1377 1308 1224 1143 1063

Med-Low 1088 1075 1038 985 916

Low 721 721 712 688 649

High 1752 1691 1659 1593 1525

Med-High 1454 1454 1417 1379 1300

Med-Low 975 944 912 879 844

Low 631 593 552 515 486

High 1810 1740 1675 1585 1510

Med-High 1570 1540 1495 1445 1375

Med-Low 1090 1080 1070 1065 1050

Low 710 700 690 665 650

External Static Pressure – inches w.c.

Motor

Furnace Model Motor HP

P4LBX20F19001 3/4 HP 13.0 85°F G12 7 x ¾

TIP:

These formulae will assist with the design of the ductwork and the determination of airflow delivery:

Motor

FLA

∆∆∆∆T

Blower

Blower

Pulley

Pulley

Turns

Out

0 2274 2080 1847 1532 1099

2 2107 1927 1712 1420 1019

4 1939 1775 1576 1308 939

6 1772 1622 1441 1196 859

Bonnet Output

CFM

= =

x SystemTemperature Rise

1085 1085. .

() ()

13

CFM

External Static Pressure – Inches water column

0.20 0.30 0.40 0.50 0.60

Bonnet Output

SystemTemperature Rise

xCFM

GENERAL DIMENSIONS - P2LBX16F14501

Cabinet Plenum Openings Flue

Width

(A)

Depth

(B)

Height

(C)

Supply Air

(D x E)

Return Air

(D x G)

Gap

(F)

Dia.

(H)

Height

(J)

Filter

Shipping

Weight

22 51-½ 41

All dimensions in inches.

20-½ x 18-

⅝ 20-½ x 18-⅝

1-¾ 6 34-⅜ 20 x 25 x 1 290 lb.

14

GENERAL DIMENSIONS - P4LBX20F19001

Cabinet Plenum Openings Flue

Width

(A)

Depth

(B)

Height

(C)

Supply Air

(D x E)

Return Air

(D x G)

Gap

Dia.

(H)

Height

(J)

Filter

(2)

Shipping

Weight

26 46

1

Add 8-½ inches to allow for oil burner, (54-½ inches total). All dimensions in inches.

1

56 24 x 22 24 x 22 2-⅝ 7 50-¼ 20 x 25 x 1 390 lb.

15

GENERAL DIMENSIONS - P3DHX12F08001

Cabinet Plenum Openings Flue

Width

(A)

Depth

(B)

Height

(C)

Supply Air

(D x E)

Top

(K x L)

Return Air

Side

(F x G)

Dia.

(H)

Height

(J)

Filter

Shipping

Weight

22-¼ 22-¼

1

Add 8-½ inches to allow for burner, (30-¾ inches total).

1

54-¾ 19 x 19 18 x 18 18 x 18 5 28-¼ 20 x 20 x 1 263 lb.

Add 8-¾ inches to allow for add-on vestibule cabinet, (31 inches total). All dimensions in inches.

16

GENERAL DIMENSIONS - P2DHX16F12001

Cabinet Plenum Openings Flue

Width

(A)

Depth

(B)

Height

(C)

Supply Air

(D x E)

Return Air

(F x G)

Dia.

(H)

Height

(J)

Filter

Shipping

Weight

22-¼ 22-¼

1

Add 8-½ inches to allow for burner, (30-¾ inches total). All dimensions in inches.

1

62-¼ 20-¾ x 20-¾ 18 x 18 6 37-¼ 20 x 20 x 1 320 lb.

17

WIRING DIAGRAM: MODEL P3DHX12F08001

WIRING DIAGRAM: MODEL P2DHX16F12001

18

WIRING DIAGRAM: MODEL P2LBX16F14501

WIRING DIAGRAM: MODEL P4LBX20F19001

19

R7184 DETAILED SEQUENCE OF OPERATION

Power is applied to unit. The R7184 completes a self-diagnostic procedure. If no light or flame is present, and unit passes its self­diagnostic procedure, the control enters into the idle mode.

Thermostat calls for heat:

A) Safety check is made for flame (4 second delay).

1) When flame is not present, the R7184 will apply power to the burner motor and igniter.

2) When flame is present, the control remains in the idle state.

B) Unit enters and completes a pre-purge period of 15 seconds, then applies power to the solenoid valve.

C) Control enters the trial for ignition state.

D) Control monitors the burner flame.

1) When flame is present, the control enters ignition carryover state. (Continues to spark for 10 sec.).

a) Provides continuous spark after flame is sensed to assure that burner remains lit.

b) Turns on LED diagnostic light.

c) Starts carryover timer.

(i) Flame and call for heat are monitored.

• If flame is lost and lockout timer has not expired, R7184 will return to trial for ignition state.

• If flame is lost and lockout timer has expired, R7184 will enter the recycle state.
♦ Recycle timer starts.
♦ Burner motor and igniter and solenoid valve are turned off.
♦ LED diagnostic light flashes slow.
♦ Returns to idle state when recycle timer expires (60 seconds).

E) Carryover timer expires.

1) Enters run state.

a) Igniter turns off.

Combustion continues until thermostat is satisfied, or R7184 detects a loss of flame and enters into Recycle Mode.

F) Thermostat is satisfied - call for heat is terminated:

a) R7184 shuts off burner motor and solenoid valve.

b) LED diagnostic light is off.

c) R7184 returns to idle state.

20

y

g

g

g

g

IDLE STATE

THERMOSTAT CALLS FOR HEAT

SAFETY CHECK FOR FLAME

BURNER MOTOR & IGNITOR START

SOLENOID VALVE OPENS

TRIAL FOR IGNITION

BURNER FLAME MONITORED

(5 SEC.)

R7184

SEQUENCE of

OPERATION

REMAINS IN IDLE STATE

LOCKOUT STATE

R7184:

• Shuts off burner motor

• Shuts off igniter

• Shuts off Solenoid Valve

• Fast Flashes LED Diagnostic

Li

ht

CARRYOVER STATE

• Provides continuous spark

• LED diagnostic light ON

• Start Carr

CARRYOVER TIMER EXPIRES

nitor turns off.

• I

THERMOSTAT SATISFIED

R7184 SHUTS OFF:

• Burner Motor

• Solenoid Valve

• LED Dia

over Timer

RUN STATE

nostic Light

TO EXIT LOCKOUT

PRESS RESET

RECYCLE TIMER STARTS

R7184:

• Shuts off Solenoid Valve

• Shuts off Ignitor

• Shuts off Burner Motor

• Slow Flashes LED diag-

nostic li

RECYCLE TIMER EXPIRES

ht

(60 SECONDS

RETURNS TO IDLE STATE

21

R7184 LED DIAGNOSTIC LIGHT

The LED diagnostic light has several
functions. It indicates the state or mode
in which the oil burner is operating. It will
also indicate fault conditions, and help
determine cad cell resistance while the
burner is operating.

ORMAL CONDITIONS

N

The LED diagnostic light will turn on
when the burner enters the carryover
state; the point at which ignition spark is
on, and will remain on through the run
state, where the ignition spark is termi­nated but the burner continues to fire.

The LED diagnostic light will turn off at
the end of the burner cycle as the R7184
enters the idle state, and will remain off
until the next heating cycle.

AULT CONDITIONS

F

If the LED diagnostic light is flashing
quickly; 1 Hz (½ second on / ½ second
off), the R7184 is in the lockout state or
in restricted mode. To exit the lockout
state, press the reset button.

If the LED diagnostic light is flashing
slowly; ¼ Hz (2 seconds on / 2 seconds
off), the R7184 is in the recycle state.
This indicates that flame sensing was
lost after the lockout timer expired during
the ignition carryover state. The R7184
will return to the idle state within 60 sec­onds.

AD CELL CONDITION

C

If the LED diagnostic light is off, the cad
cell is not sensing flame.

If the LED diagnostic light is on, the cad
cell is sensing flame, or viewing ambient
light.

The resistance of the cad cell may be
checked while the R7184 is in the run
state by pressing the reset button. The
LED diagnostic light will flash the follow­ing code:

Table C-1: Cad Cell Resistance

Flashes Resistance in Ohms

1 Less than 400

2 Between 400 - 800

3 Between 800 – 1600

4 Between 1600 - 5000

:

:

:

Troubleshooting

IMPORTANT:

Due to the potential hazard of
line voltage, only a trained, ex­perienced service technician
should perform the trouble­shooting procedure.

PRELIMINARY STEPS:

Check the diagnostic light for indications
of burner condition. Refer to R7184 LED

DIAGNOSTIC LIGHT

section for details.

When simulating a call for heat at the
R7184, disconnect at least one thermo­stat lead wire from the T1 - T2 terminals
to prevent damage to the thermostat.
Neglecting this procedure may burn out
the heat anticipator of a standard 24

VAC

thermostat, or cause harm to compo­nents within a micro-electronic thermo­stat.

Before checking the oil primary control,
perform these preliminary checks, (repair
or replace controls as necessary):

• check the power supply; fuse box or

breaker, any service switches, all wir­ing connections, and burner motor re­set button (if equipped).

• check the limit switches to ensure that

the switch contacts are closed.

• check the electrode gap and position.

• check the contacts between the oil

primary control and the electrodes.

• check oil supply (tank gauge).

• check the oil nozzle, oil filter, and oil

valves.

• check the piping or tubing to the oil

tank.

• check the oil pump pressure.

HECK OIL PRIMARY CONTROL AND IGNITOR

C

If the trouble does not appear to be in
the burner or ignition hardware, check
the oil primary control and the ignitor by
using the following equipment:

screwdriver.

voltmeter (0 - 150

VAC

)

insulated jumper wires with both ends
stripped.

Electrical Shock Hazard.

Troubleshooting is done with the system
powered. Be careful to observe all nec­essary precautions to prevent electrical
shock or equipment damage.

Preliminary Checks:

Make sure that limit switches are closed
and that contacts are clean.

Check for line voltage power on the oil
primary control black and white lead
wires.

Refer to Table C-4 or C-5 for further trou­bleshooting information.

R8184N NOTES

The R8184N oil primary control is a
standard intermittent ignition control with
a 45 second timing.

The low voltage wires to the L4064W
fan/limit controller must be connected to
“F2” and “T2”. Incorrect wiring connec­tions will cause nuisance lockouts.

The R8184N oil primary control has an
enhanced power supply to enable pow­ering the L4064W fan/limit controller
heater circuit. Substitute oil primary con­trols such as the R8184G and others will
not work with this system.

Cad cell resistance can be checked with
an ohmmeter. During normal combus­tion, the resistance should be less than

1500 Ω, preferably under 900 Ω. To

measure the resistance, start the oil
burner. After one minute of operation,
place a temporary jumper across “F1”
and “F2”. Remove one of the cad cell
wires then read the resistance by con­necting the ohmmeter probes to the two
cad cell wires. Next, remove the jumper.
The oil burner should stop immediately.
Shut off the power to the furnace then re­fasten the cad cell wire to the terminal
from which it was removed. Restore
power to the furnace to continue normal
operation.

22

TABLE C-2: R7184 TROUBLESHOOTING

Condition: Burner motor does not start when there is a call for heat.

Procedure Status Corrective Action

1. Check that limit switches are
closed and contacts are
clean. This includes the
burner motor reset button.

2. Check for line voltage power
at the oil primary control.
Voltage should be 120 Vac
between the black and white
lead wires on the oil primary
control.

3. Check indicator light with
burner off, no call for heat (no
flame).

4. Shield cad cell from external
light.

5. Jumper thermostat (T -T)
terminals on R7184

IMPORTANT
First remove one thermostat lead

wire.

Condition: Burner starts then locks out on safety with indicator light flashing at 1 Hz rate (½ second on, ½ second off)

Procedure Status Corrective Action

1. Check that the limit switches
are closed and contacts are
clean.

2. Check for line voltage power
at the oil primary control.
Voltage should be 120 vac
(nominal)

3. Check indicator light with
burner off, no call for heat (no
flame).

Continues on ne x t page

Indicator light is on.

Indicator light is off. Go to step 5.

Indicator light turns off.

Indicator light stays on.

Burner starts.

Burner does not start.

Indicator light is on.

Indicator light is off. Go to step 5.

N/A N/A

N/A N/A

Cad cell is defective, sees external light, or connections
have shorted. Go to step 4.

Eliminate external light source or permanently shield cad
cell.

• Replace cad cell with new cad cell and recheck.

• If indicator light does not turn off, remove yellow

leadwires from R7184 and recheck.

• If indicator light is still on, replace the R7184

control.

• If the indicator light turns off, replace cad cell

bracket assembly.

Trouble is in thermostat circuit. Check thermostat wiring
connections.

If connections are clean and tight, check thermostat wires
for continuity.

• Disconnect line voltage power and open line

switch.

• Check all wiring connections.

• Tighten any loose connections and recheck.

• If burner still doesn't start, replace R7184

If burner still doesn't start, check the oil burner motor. It
may be seized or burned out.

- - - - - -

- - - - - -

Cad cell or controller is defective, sees external light, or
connections are shorted. Go to step 4.

23

Table C-2: R7184 Troubleshooting

Procedure Status Corrective Action

4. Shield cad cell from exter-

nal light.

5. Jumper thermostat (T -T)

terminals on R7184

IMPORTANT

First remove one thermostat
lead wire.

Condition: Burner starts then locks out on safety with indicator light flashing at 1 hz rate (½ second on, ½ second
off)

6. Reset oil primary control

by pushing in and releas­ing red reset button.

7. Listen for spark after

burner turns on (after 2
second delay). Ignition is on but no oil is

8. Check indicator light after

flame is established, but
before oil primary control
locks out.

view of flame.

• Disconnect line voltage

power and open line
switch.

• Unplug cad cell and clean

cad cell face with soft
cloth. Check sighting for
clear view of flame. Re­place cad cell in socket.

• Reconnect line voltage

power and close line
switch.

• Start burner.

Continues on ne x t page

continued from previous page

Indicator light turns off. Eliminate external light source or permanently shield cad cell.

Indicator light stays on.

Burner starts.

Burner does not start.

Indicator light stops flashing. Go to Step 7.

Indicator light continues to
flash at 1 Hz rate.

Ignition is off

Ignition is on. Go to Step 8.

being sprayed into the com­bustion chamber.

Indicator light is on until the
control locks out and starts
flashing during lockout.

Indicator light stays off. Go to step 9.

Burner locks out. Go to step 10. 9. Check cad cell sighting for

Burner keeps running. System is OK.

4. Replace cad cell with new cad cell and recheck.

5. If indicator light does not turn off, remove cad cell lead­wires from R7184 and recheck.

6. If indicator light turns off, replace cad cell bracket as­sembly.

7. If indicator light does not turn off, replace controller.

Trouble in thermostat or limit circuit. Check thermostat or limit
wiring connections.

Disconnect the line voltage power and open line switch.
Check all wiring connections.
Tighten any loose connections and recheck.
If burner does not start, replace R7184

Verify that the control is not in restricted mode. (See notes at
end of this table.). If not in restricted mode, replace R7184

Spark ignitor could be defective. Check for line voltage at
ignitor terminals. If line voltage is present, replace R7484.

Wait for “Valve ON” delay to complete. Check oil supply, and
oil line valve. Check for filter blockage or seized oil pump.

Replace R7184

24

Table C-2: R7184 Troubleshooting
Procedure Status Corrective Action

• Disconnect line voltage

power and open line switch.

• Remove existing cad cell

and replace with new cad
cell.

• Disconnect all wires from

thermostat terminals to en­sure that there is no call for
heat.

• Reconnect line voltage

power and close line switch.

• Expose new cad cell to

bright light such as a flash­light.

sembly.

• Disconnect line voltage

power and open line switch.

• Remove cad cell wires from

quick connect connectors
on the and leave control
leadwires open.

• Apply power to device.

• Place jumper across cad

cell terminals after burner
motor turns on.

NOTE: Restricted Mode - (Limited Reset): In order to limit the accumulation of unburned oil in the combustion chamber, the con-

trol can be reset only 3 times, after which, the control locks out. The reset count returns to zero each time a call for heat
is successfully completed.

To reset from R

ESTRICTED MODE

vice has reset.

NOTE: Disable function: Pressing and holding the reset button will disable all functions until the button is released. The burner

will restart at the beginning of the normal heat cycle on

TABLE C-3: SYSTEM AND GENERAL TROUBLESHOOTING

Problem Possible Cause Remedy

Thermostat not calling for heat.

No power to furnace.

Furnace will not start.

Thermostat faulty.

Oil primary control faulty.

Continues on next page

continued from previous page

Indicator light is on. Remount control onto burner housing. Go to step 6. 10. Check cad cell.

Indicator light is off. Go to step 11.

Indicator light is on. Replace cad cell bracket assembly. 11. Check cad cell bracket as-

Indicator light is off. Replace R7184.

: press and hold the reset button for 30 seconds. When the LED flashes twice, the de-

SAFETY CHECK

.

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

Check furnace switch, main electrical panel furnace fuse or cir­cuit breaker. Also look for any other hand operated switch, such
as an 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 T1 - T2. Check for 24v
across T -T. If no voltage is present, check for 115v to oil pri­mary control. If 115v is present, go to Table C-2.

25

Table C-3: System and General Troubleshooting

Problem Possible Cause Remedy

Photo Cell wiring shorted or
room light leaking into photo

Furnace will not start.

cell compartment

Open safety switch.

No fuel oil.

Clogged nozzle.

Furnace will not start
without first pushing oil

Clogged oil filter. Replace oil tank filter or in-line filter if used.

primary control reset
button.

Low oil pump pressure.

(Happens on frequent
basis)

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

Defective burner motor.

Furnace starts, but cuts
out requiring manually
resetting the oil protector

Photo Cell (Cad Cell) defec­tive.

reset button.

No fuel oil.

Clogged nozzle.

Clogged oil filter. Replace oil tank filter or in-line filter if used.

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

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.

Frozen oil line.

Electrodes out of adjustment
or defective.

Poor transformer high voltage
connections or defective trans-

Oil burner sputtering at
nozzle

former.

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

Defective oil pump.

Fuel oil line partially clogged or
contains air.

Continues on next page

continued

Check photo cell (cad cell) wiring for short circuits. Also, check
for room light leaking into cad cell compartment. Repair light
leak if necessary. See Table C-2.

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

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. Ensure that erratic pressure read­ings are not caused by defective fuel oil line.

Check fuel oil lines. Replace any compression fittings found with
high quality flared fittings. 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.

If cad cell is dirty, clean it. (Determine why cad cell is getting
dirty). If cad cell is poorly aimed, realign it. NOTE: The photocell

should have a resistance of 100K Ω in absence of light; a maxi­mum of 1500 Ω in the presence of light. Ensure that room light

is not leaking into the cad cell compartment. (see diagnostic
light section, or manually measure cad cell resistance).

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. Ensure that erratic pressure read­ings are not caused by defective fuel oil line.

Check fuel oil lines. Replace any compression fittings found with
high quality flared fittings. 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.

Drain fuel oil storage tank; replace fuel oil. (Consult with fuel oil
supplier).

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 / 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.

26

Table C-3: System and General Troubleshooting

Problem Possible Cause Remedy

System temperature rise too
high.

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

Excessive fuel oil con­sumption.

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

Stack temperature too high.

Thermostat improperly ad­justed or in poor location.

Insufficient combustion air
adjustment at oil burner, or

Too much smoke.

improper draft pressure.

Heat exchanger partially
clogged.

Poor alignment between oil

burner blast tube and fire pot.
Soot building up on blast
tube (end coning).

Flame impingement caused by

Incorrect nozzle angle.

Defective fire-pot Check fire-pot. Repair or replace.

Airflow blocked or dirty air fil-

ter.

Thermostat adjustments or

location.

Insufficient airflow.

Furnace will not warm
home to desired tem­perature.

Defective high limit control.

Under-sized nozzle.

Blower fan motor stopping

intermittently on overload.

Burner motor stopping intermit-

tently on overload.

Home does not heat
evenly

Continues on next page

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

continued

System temperature rise ideally should not exceed 85°F. Check
for clogged air filters. Check blower fan for excess dirt build-up
or debris. Speed up blower fan if necessary.

Check “fan off” delay timing setting. Use a duct thermometer in
the supply air plenum take-off or first few inches of the supply
air trunk duct. Ideally, the fan will shut off at a temperature of
90° - 100°F. Manipulate the dip switch settings to come as close
as possible to this “fan off” temperature.

Check stack temperature. Stack temperatures will normally
range from 350° to 450°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 the thermostat is being influenced by drafts, sunlight, duct
work, etc., relocate to more suitable location.

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

or lowest practical O2 content in

2

the flue gases. See Burner Set Up.

Check for soot build-up in heat exchanger flue passages, espe­cially in the outer radiator.

Check alignment. air tube should be centered with fire pot
burner opening. Oil burner head should be ¼ inch back from the
inside surface of the fire pot.

Check nozzle size and angle. (See Appendix A). Check dis­tance from head to inside surface of the fire pot.

Clean or replace air filter.

Check thermostat heat anticipator setting against measured
amperage draw. Increase heat anticipator setting if necessary.
If the thermostat is being influenced by drafts, sunlight, duct
work, etc., relocate to more 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 a duct ther­mometer to assess accuracy of limit control. Check for obstruc­tions to airflow around limit switch bi-metal elements. Replace
control if necessary.

Check nozzle. If problem is not caused by air flow 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.

27

Table C-3: System and General Troubleshooting

Problem Possible Cause Remedy

Airflow blocked or dirty air fil-

Supply air temperature
too hot.

Supply air temperature
too cool.

Supply air temperature
too cool during first mo­ments of furnace cycle.

ter.

Insufficient airflow.

Excess airflow.

Excessive duct losses.

Fan control "fan on" setting too

low.

Excessive duct losses.

P4LBX20F19001 ASSEMB LY
NOTES

The P4LBX20F19001 oil-fired furnace is
shipped in two pieces; the furnace sec­tion and the blower section. These two
sections must be assembled together at
the installation site.

1. Remove the crating and packaging
materials from each section. Re­move the flue pipe flange gasket
packed with the furnace section.
The flue pipe gasket will be lying
loose on the floor of the furnace sec­tion.

2. Remove the shipping brace from the
furnace section flue pipe flange and
cabinet. Remove and save all of the
screws from the flue pipe flange,
and the ten screws from the rear
edges of the furnace section cabi­net, (5 per side). The screws will be
re-used.

3. Place the furnace section and
blower section in close proximity.
Route the wiring harness from the
base of the furnace section through
the plastic grommet in the blower
section blower division panel.

4. Position and align the flue pipe
flange gasket between the furnace
section and blower section flue pipe
flanges, and hold it in place with a
pair of awls or similar tool.

5. Begin fastening the flue pipe flanges
together from inside the blower sec­tion to the furnace section with the

28

six ¼-20 x ¾ inch screws saved
from the removal of the shipping
brace. Start each screw carefully so
as not to damage the flue pipe
flange gasket. After all six screws
have been started, and proper gas­ket alignment has been confirmed,
tighten all six screws evenly.

6. Align the screw holes in the blower
section blower division panel with
the screw holes in the furnace sec­tion cabinet rear edge, from which
the ten screws were removed. The
screws are started from the inside of
the blower section to the furnace
section. Tighten all ten screws
evenly.

7. In a similar manner, start four of the
extra screws removed and saved
from the furnace section flue pipe
flange into the screw holes along the
top of the two furnace sections.

8. Remove the blower motor electric
wiring cover plate. Connect the
black lead from the wiring harness
to motor terminal L1, the white lead
to motor terminal L2, and the green
lead to the motor casing ground
terminal. Position the wires in the
motor casing indentations and re­install the blower motor electric wir­ing cover plate.

continued

Clean or replace air filter.

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 system temperature rise. Slow down blower fan if neces­sary.

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

Increase differential between fan control "fan off" and "fan on"
settings. (L4064B, L6064A fan / limit controls only, no adjust­ments available for L4064W fan / limit control). Register air de­flectors may help.

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

P3DHX SERIES DOWNFLOW
CONFIGURATION NOTES

When the P3DHX12F08001 or
P2DHX16F12001 are installed in the
downflow configuration on a wooden
floor, it should be mounted on a sub­base.

The sub-base provides a means of main­taining the supply air plenum clearance
to combustibles, and a means of mating
the supply air plenum to the furnace.

Model Sub-base

P3DHX12F08001 1CB1312

P2DHX16F12001 1CB0316

If the furnace is to be installed on a wood
floor over joists on 12 inch or 16 inch
centers, framing modifications are nec­essary.

Rough Size Openings:

P3DHX12F08001: 21” x 21”.

P2DHX16F12001: 22½” x 22½”.

The edges of the rough size opening
must be well supported by the joist fram­ing to take the weight of the furnace.

The sub-base may support the supply air
plenum. Fold a ¾ inch, 90° flange, then
drop the supply air plenum through the
sub-base opening. The flanges will rest
on the sub-base, and the furnace placed
on the flange will lock the plenum into
place.

The above diagrams show typical ap­proaches to framing the rough size open­ing for the P*DHX series furnaces. Be
sure to follow local building code re­quirements with respect to framing modi­fications.

P3DHX12F08001 VEST IBULE KIT

When the P3DHX12F08001 furnace is
installed in the downflow position, the
Part No. 1VP1280 Vestibule Kit may be
used. The vestibule kit encloses the oil
burner assembly and provides a pleasing
exterior finish.

NOTE: The vestibule kit should be in-

stalled before installation of the electrical
wiring, venting and fuel line or lines.

1. Fasten the right hand panel to the
base panel using 2 10-¾ sheet
metal screws. The right hand panel
has the large opening in the lower
end to accommodate a combustion
air pipe to the oil burner. The base
panel has screw holes along the
rear edge, which will later be used to
fasten the vestibule to the furnace.

2. Fasten the left hand panel to the
base panel using 2 10-¾ sheet
metal screws.

3. Fasten the top panel to the two
sides using 10-¾ sheet metal
screws, 3 per side.

Note the pattern of small and large holes
along the base panel and two side pan­els. The vestibule unit will use the
screws in the front of the furnace which
correspond to the small holes noted
above.

4. Remove the sheet metal screws in
the furnace front panel which corre­spond to the small holes only
the rear edge of the vestibule base
and side panels.

along

NOTE: Do not remove all screws from

the front panel of the furnace.

5. Place the assembled vestibule
against the front panel of the fur­nace, and align the vestibule screw
holes with the furnace front panel
screw holes.

6. Fasten the vestibule into place
using the screws which were
removed from the furnace.

HINT: To help with fastener alignment,
do not tighten any of the screws all the
way in until each screw has been started
2 or 3 turns.

NOTE: Extra sheet metal screws are
provided with this kit in case screws re­moved from the furnace are accidentally
dropped or lost.

29

REPAIR PART LIST – P3DHX12F08001A

ITEM DESCRIPTION

1 Assembly, Right Side Panel
2 Assembly, Left Side Panel
3 Panel, Rear
4 Assembly, Blower Division Panel
5 Assembly, Base Panel
6 Panel, Inner Front

7 Door, Blower Access
7A Handle, Door
7B Bezel, Logo
7C Label, Logo

8 Panel Assembly, Top

9 Assembly, Heat Exchanger
10 Bracket, Firepot Retainer
11 Chamber, Replacement Combustion
12 Assembly, Oil Burner Mounting Plate

12A Gasket, Inspection Door (Right)
12B Gasket, Inspection Door (Left)

12C Gasket, Inspection Door (Center)

13 Assembly, Flue Collector
14
15 Gasket, Pouch
16 Gasket, Flue Pipe (2 Req’d)

Assembly, Radiator Cleanout Cover (2 Req’d)

17

17A Gasket, Clean-out Cover (2 Req’d)

18 Cover, Casing Clean-out (2 Req’d)
19 Frame, Filter
20 End Support, Filter Frame
21 Filter, Air - 16 x 25 x 1 (Permanent)
22 Box, Junction

30

ITEM DESCRIPTION

23
24 Control, Fan & Limit (set @ 250 Deg. F.)
25 Harness, Fan & Limit Wire
26 Blower Direct, Wire Harness
27 Center, Fan

27A Relay, Replacement

28 Regulator, Draft

29 Burner, Oil
29A Burner, Motor
29B Pump, Oil
29C Ignitor, Solid State
29D Control, Primary Combustion
29E Combination, Air Tube
29F Head, Flame Retention
29G Nozzle 0.65/ 60 Deg. A

30 Assembly, Blower (Complete)
30A Housing and Wheel, Blower
30B Wheel, Blower
30C Motor, Blower
30D Band, Motor Mount
30E Arms, Motor Mount (3 Req’d)
30F Capacitor, Run
30G Strap, Capacitor
30H Insulator, Capacitor

30I Side Rail, Blower (2 Req’d)

30J Bracket Blower Front

31 Limit, Auxillary (160 Deg. F.)

32 Baffle, Rear Panel

33 Retainer Channel, Wire

REPAIR PART LIST – P2DHX16F12001A

ITEM DESCRIPTION

1 Side Panel, Right and Left (2 Req’d)
2 Side Panel (Heat Exchanger (2 Req’d)
3 Panel, Rear
4 Assembly, Blower Division Panel
5 Support, Base Heat Exchanger
6 Panel, Front

7 Door, Blower Access
7A Handle, Door
7B Bezel, Logo
7C Label, Logo

8 Panel, End

9 Assembly, Heat Exchanger
10 Bracket, Firepot Retainer
11 Chamber, Replacement Combustion
12 Assembly, Oil Burner Mounting Plate

12A Gasket, Inspection Door (Right)
12B Gasket, Inspection Door (Left)

12C Gasket, Inspection Door (Center)

13 Assembly, Flue Collector
14 Cover, Flue Collector
15 Gasket, Pouch (2 Req’d)
16 Gasket, Flue Pipe (2 Req’d)

Assembly, Radiator Cleanout Cover (2 Req’d)

17

17A Gasket, Cleanout Cover (2 Req’d)

18 Cover, Casing Clean-out (2 Req’d)
19 Frame, Filter
20 End Support, Filter Frame
21 Filter, Air - 16 x 25 x 1 (Permanent)
22 Box, Junction
23 Limit Switch, Secondary - 200 Deg. F.

31

ITEM DESCRIPTION

24 Control, Fan & Limit (set @ 220 Deg. F.)
25 Harness, Fan & Limit Wire
26 Blower Direct, Wire Harness
27 Center, Fan

27A Relay, Replacement

28 Regulator, Draft

29 Burner, Oil
29A Burner, Motor
29B Pump, Oil
29C Ignitor, Solid State
29D Control, Primary Combustion
29E Combination, Air Tube

Head, Flame Retention (120,000 BTU)

29F

Head, Flame Retention (130,000 BTU)
Nozzle 1.00/ 60 Deg. A

29G

Nozzle 1.00/ 70 Deg. A

30 Assembly, Blower (Complete)
30A Housing and Wheel, Blower
30B Wheel, Blower
30C Motor, Blower
30D Band, Motor Mount
30E Arms, Motor Mount (3 Req’d)
30F Capacitor, Run
30G Strap, Capacitor
30H Insulator, Capacitor

30I Side Rail, Blower (2 Req’d)

30J Bracket Blower Front

31 Limit, Auxillary (130 Deg. F.)

REPAIR PART LIST – P2LBX16F14501A

ITEM DESCRIPTION

1 Panel, Side (Left)
2 Panel, Side (Right)
3 Panel, Rear (Upper)
4 Panel, Blower Division
5 Panel Assembly, Base

6 Panel, Inner Front
6A Bezel, Logo
6B Label, Logo

7 Door, Blower Access
7A Handle, Door

8 Panel, Front Door

9 Panel, Top Front
10 Heat Exchanger Assembly
11 Flue Pipe Assembly
12 Retaining Bracket, Firepot
13 Chamber, Replacement Combustion
14 Baffle, Top Front
15 Baffle, Inner Front
16 Baffle, Right Side Panel
17 Mounting Plate Assy., Oil Burner

17A Gasket, Inspection Door

18 Gasket, Pouch
19 Gasket, Flue Pipe (2 Req’d)
20 Cover Assembly,

20A Gasket, Clean Out Cover (2 Req’d)

21 Clean-out Cover, Casing (2 req’d)
22 Filter, Air (20”x 20”x1”, Permanent)
23 Box, Junction
24 Wire Harness, Blower Direct Drive
25 Wire Harness, Fan and LImit

32

Radiator Cleanout (2Req’d)

ITEM DESCRIPTION

26 Centre, Fan

26A Relay, Replacement (Centre Fan)

27 Control, Fan and LImit (5”, 200 Deg.)
27A Fuse ABC 15 Amp Slow Blow
27B Fuse Holder

28 Regulator, Draft (6”)

29 Support, Fan & LImit/Insulation Retainer

30 Insulation Retainer, Side Panel (2 Req’d)

31 Burner, Oil
31A Motor, Burner
31B Pump, Oil
31C Ignitor, Solid State
31D Combustion Control, Primary
31E Tube Combination, Air
31F Retention Head, Flame

Nozzle, (1.00/80 Deg.A)

31G

Nozzle, (1.20/60 Deg.A)

32 Blower Assembly, Complete

32A Housing, Blower and Wheel
32B Wheel, Blower
32C Motor, Blower
32D Mount Band, Motor
32E Mount Arms, Motor (3 Req’d)

32F Run Capacitor, Motor (10MFD/370VAC)

32G Strap, Capacitor
32H Insulator, Capacitor

32I Blower Feet, Blower (LH)

32J Blower Feet, Blower (RH)

REPAIR PART LIST – P4LB SERIES

ITEM DESCRIPTION

1 Panel, Left Side (Heating Compartment)
2 Panel, Right Side (Heating Compartment)
3 Panel, Left Side (Blower Compartment)
4 Panel, Right Side (Blower Compartment)
5 Panel, Upper Rear (Blower Compartment)
6 Panel, Blower Partition
7 Panel Assembly, Base (Heating Compartment)
8 Panel Assembly, Base (Blower Compartment)

9 Panel, Upper Rear (Heating Compartment)
10 Heat Exchanger Assembly
11 Firepot Bracket Assembly
12 Combustion Chamber, Replacement
13 Clean-out Cover Assembly (Radiator) (2 Req’d)

13A Yoke Assembly
13B Cover, Clean-out
13C Gasket, Clean-out Cover

14 Panel, Front

14A Logo Bezel
14B Logo Label

15 Control, Fan & Limit (8” Insertion, Set @ 200 Deg.F)
16 Box, Junction
17 Fuse Holder
18 Fuse (ABC-15)
19 Retainer Channel, Wire
20 Access Panel, Blower Door

20A Handle, Door

21 Baffle, Front Panel
22 Baffle, Top Front Panel
23 Burner Assembly, Oil

23A Motor, Burner

ITEM DESCRIPTION

23B Pump, Oil
23C Ignitor, Solid State
23D Control, Primary Combustion
23E Air Tube Combination
23F Retention Head, Flame (F16)

23G Nozzle, 1.65/70 Deg.B

24 Mounting Plate Assembly, Oil Burner
24A Door, Inspection
24B Gasket, Inspection Door

25 Gasket, Pouch

26 Flue Pipe Assembly

27 Gasket, Flue Pipe (2 Req’d)

28 Filter Rail Assembly (2 Req’d)

29 Filter Support, Top

30 Filter Support, Front and Rear (2 Req’d)

Filter (2 Req’d) (Disposable 20”x 25”x 1”)

31

Filter (2 Req’d) (Permanent 20”x 25”x 1”)
32 Regulator, Draft (7”)
33 Cover, Casing Clean-out (2 Req’d)
34 Blower Assembly

34A Housing and Wheel, Blower
34B Motor, Blower
34C Pulley, Motor
34D Pulley, Blower
34E Belt, Fan
34F Base Feet, Blower (RH)

34G Base Feet, Blower (LH)

33

REPLACEMENT PART CONTACT INFORMATION

This is a generic parts list. To request a complete parts list, refer to the contact information below:

• Call Consumer Relations at 1-877-874-7378. Follow the instructions to contact the department and/or represen­tative that can assist you.

• Visit our website at www.source1parts.com for the following information:

1. Search for a part or browse the catalog.

2. Find a dealer or distributor.

3. Customer Service contact information.

a. Click on the “Brand Links” button
b. Click on the “Customer Service” button

• You can contact us by mail. Just send a written request to:

York International

Consumer Relations

5005 York Drive

Norman, OK 73069

34

NOTES

35

36

Subject to change without notice. Printed in U.S.A.
Copyright © by York International Corp. 2003. All rights reserved

Unitary
Products
Group

5005
York

Drive

Supersedes 035-14289-000, 660.08-N1U (0300)

035-14289-001 Rev. A (0503)

Norman

OK

73069