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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  P*LBX16F14501 is a rear-breech 
lowboy model with an output range of 
130,000 to 143,000 BTUH. Model 
P*LBX20F19001 is a rear-breech lowboy 
model with an output range of 168,000 to 
188,000 BTUH. 

All models are listed with the Canadian 
Standards Association
, (CSA), and 
comply 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 
regulations of NFPA No. 31, Installation 
of Oil Burning Equipment
, as well as in 
accordance 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.  

The P*LBX16F14501 model is shipped 
assembled, pre-wired, and ready for 
lowboy furnace applications. The 
P*LBX16F14501 model is air 
conditioning ready. The furnace should 
be carefully inspected for damage when 
being unpacked. 

 

 

 

 

 

 

The P*LBX20F19001 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 P*LBX20F19001 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. titled, 
"Load Calculation" published by the Air 
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. 

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. 

 

 

 

 

 

 

Summary of Contents for P*LBX16F14501

Page 1: ...ER SET UP 11 TABLE A 3 BELT DRIVE BLOWER SET UP 11 TABLE A 4 DIRECT DRIVE BLOWER CHARACTERISTICS 12 TABLE A 5 BELT DRIVE BLOWER CHARACTERISTICS 12 WIRING DIAGRAM MODEL P LBX16F14501 13 WIRING DIAGRAM...

Page 2: ...f 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 ins...

Page 3: ...tility 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...

Page 4: ...CE 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 throug...

Page 5: ...Must be handled by competent masonry contractor G Collection of soot at narrow space in flue opening Lower light on extension cord Clean out with weighted brush or bag of loose gravel on end of line H...

Page 6: ...s 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 11 feet it may be necessary to use a pressure regulating device approve...

Page 7: ...ts are closed System switch must be on HEAT 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 p...

Page 8: ...auses 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 effi...

Page 9: ...at 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...

Page 10: ...a long flexible plastic spout DO NOT OVER LUBRICATE Excess oil may result in premature electric motor failure Inspect the blower fan Clean it if necessary Oil Burner Maintenance Follow the instruction...

Page 11: ...up the chimney between burner cycles NOTE THE USE OF THIS CONTROL CAN OCCASIONALLY CAUSE POST COMBUSTION NOZZLE DRIP TABLE A 2 DIRECT DRIVE BLOWER SET UP BLOWER SET UP COOLING CAPACITY 0 20 in w c 0 5...

Page 12: ...5 BELT DRIVE BLOWER CHARACTERISTICS CFM External Static Pressure Inches water column Furnace Model Motor HP Motor FLA T Blower Blower Pulley Motor Pulley Turns Out 0 20 0 30 0 40 0 50 0 60 0 2274 2080...

Page 13: ...13 WIRING DIAGRAM MODEL P LBX16F14501 WIRING DIAGRAM MODEL P LBX20F19001...

Page 14: ...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 monitore...

Page 15: ...rner Motor Solenoid Valve LED Diagnostic Light RETURNS TO IDLE STATE FLAME FLAME FLAME FLAME NO FLAME NO FLAME FLAME LOST FLAME LOST REMAINS IN IDLE STATE R7184 SEQUENCE of OPERATION LOCKOUT STATE R71...

Page 16: ...NG 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 ind...

Page 17: ...ntrol If the indicator light turns off replace cad cell bracket assembly Burner starts Trouble is in thermostat circuit Check thermostat wiring connections If connections are clean and tight check the...

Page 18: ...6 Reset oil primary control by pushing in and releasing red reset button Indicator light continues to flash at 1 Hz rate Verify that the control is not in restricted mode See notes at end of this tabl...

Page 19: ...h time a call for heat is successfully completed To reset from RESTRICTED MODE press and hold the reset button for 30 seconds When the LED flashes twice the device has reset NOTE Disable function Pres...

Page 20: ...sence of light Ensure that room light is not leaking into the cad cell compartment see diagnostic light section or manually measure cad cell resistance No fuel oil Check fuel oil supply Check that all...

Page 21: ...Poor alignment between oil burner blast tube and fire pot Check alignment air tube should be centered with fire pot burner opening Oil burner head should be inch back from the inside surface of the f...

Page 22: ...erature rise Slow down blower fan if necessary Supply air temperature too cool Excessive duct losses Check supply air ductwork Seal leaky joints and seams Insulate ductwork if necessary Fan control fa...

Page 23: ...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 six 1 4 20 x 3 4 inch screws saved from the removal...

Page 24: ...t 21A Cleanout Gasket 2 per unit 22 Filter Air 20 x 20 x1 Permanent 23 Box Junction 24 Wire Harness Blower Direct Drive 25 Wire Harness Fan and LImit ITEM DESCRIPTION 26 Centre Fan 26A Relay Replaceme...

Page 25: ...ner 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 Sta...

Page 26: ...nt 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...

Page 27: ...27 NOTES...

Page 28: ...ct to change without notice Printed in U S A 280200 UIM A 1206 Copyright by Unitary Products Group 2006 All rights reserved Supersedes 035 14289 001 Rev B 0605 Unitary 5005 Norman Products York OK Gro...

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