York P4LBX20F19001, P3DHX12F08001, P2DHX16F12001, P2LBX16F14501 Low oil pump pressure

Page 26

Table C-3: System and General Troubleshooting continued

 

 

Problem

 

Possible Cause

Remedy

 

 

 

 

 

 

 

Photo Cell wiring shorted or

Check photo cell (cad cell) wiring for short circuits. Also, check

 

 

 

 

 

 

room light leaking into photo

for room light leaking into cad cell compartment. Repair light

Furnace will not start.

cell compartment

leak if necessary. See Table C-2.

 

 

 

 

 

 

 

Open safety switch.

Check for open limit or auxiliary limit. Also, check internal wiring

 

 

 

 

 

 

connections; loose connectors, etc.

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

No fuel oil.

Check fuel oil supply. Check that

all hand operated fuel oil

 

 

 

 

 

 

valves are in the open position. Fill oil storage tank if necessary.

 

 

 

 

 

 

 

 

 

 

 

 

 

Clogged nozzle.

Replace nozzle with high quality replacement. Use rating plate

 

 

 

 

 

 

or Tables in Appendix A as a guide.

 

Furnace

will

not

start

 

 

Clogged oil filter.

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

without

first pushing oil

 

 

 

 

Connect pressure gauge to oil pump. Adjust pump pressure, or

primary

control

reset

Low oil pump pressure.

button.

 

 

 

 

replace oil pump if necessary. Ensure that erratic pressure read-

(Happens

on

frequent

 

ings are not caused by defective fuel oil line.

basis)

 

 

 

 

Air getting into fuel oil lines, or

Check fuel oil lines. Replace any compression fittings found with

 

 

 

 

 

 

fuel oil line dirty, clogged, or in

high quality flared fittings. Check for any signs of oil leaks. Any

 

 

 

 

 

 

some manner defective.

oil leak is a potential source of air or contaminants.

 

 

 

 

 

 

Defective burner motor.

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

Furnace

starts,

but

cuts

Photo Cell (Cad Cell) defec-

dirty). If cad cell is poorly aimed, realign it. NOTE: The photocell

out

requiring

manually

should have a resistance of 100K Ω

in absence of light; a maxi-

resetting the oil protector

tive.

mum of 1500 Ω in the presence of light. Ensure that room light

reset button.

 

 

 

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 hand operated fuel oil

 

 

 

 

 

 

valves are in the open position. Fill oil storage tank if necessary.

 

 

 

 

 

 

 

 

 

 

 

 

 

Clogged nozzle.

Replace nozzle with high quality replacement. Use rating plate

 

 

 

 

 

 

or Tables in Appendix A as a guide.

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Clogged oil filter.

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

 

 

 

 

 

 

Low oil pump pressure.

Connect pressure gauge to oil pump. Adjust pump pressure, or

Furnace

starts,

but

cuts

replace oil pump if necessary. Ensure that erratic pressure read-

 

ings are not caused by defective fuel oil line.

out

requiring

manually

 

Air getting into fuel oil lines, or

Check fuel oil lines. Replace any compression fittings found with

resetting the oil protector

reset button.

 

 

fuel oil line dirty, clogged, or in

high quality flared fittings. Check for any signs of oil leaks. Any

 

 

 

 

 

 

some manner defective.

oil leak is a potential source of air or contaminants.

 

 

 

 

 

 

Defective burner motor.

Check burner motor. If burner motor is cutting out on over-load,

 

 

 

 

 

 

determine why. Replace if necessary.

 

 

 

 

 

 

 

 

 

 

 

 

 

Water or contaminants in oil.

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

 

 

 

 

 

 

supplier).

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Frozen oil line.

Gently warm oil line. Insulate oil line. (Outdoor piping size may

 

 

 

 

 

 

require increased diameter).

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Electrodes out of adjustment

Check electrode settings. Check electrodes for dirt build-up or

 

 

 

 

 

 

or defective.

cracks in porcelain.

 

 

 

 

 

 

 

Poor transformer high voltage

Check contacts between the igniter and electrodes. If OK, re-

 

 

 

 

 

 

connections or defective trans-

 

 

 

 

 

 

place the igniter

 

Oil

burner

sputtering at

former.

 

 

 

nozzle

 

 

 

 

Fuel oil filter clogged.

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

 

 

 

 

 

 

Defective oil pump.

Check burner motor / fuel oil pump coupling. Check oil pump

 

 

 

 

 

 

pressure. Replace fuel oil pump if necessary.

 

 

 

 

 

 

 

 

 

 

 

 

 

Fuel oil line partially clogged or

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

 

 

 

 

 

 

contains air.

 

 

 

 

 

 

 

 

Continues on next page

 

 

 

26

 

 

 

 

 

 

 

 

Page 25 Page 27
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Page 25 Page 27
Contents Installation Manual ContentsLocation of Unit IntroductionHeat Loss DOWN-FLOW Installation Horizontal Installation NON-SUSPENDED InstallationCombustion AIR Suspended InstallationAIR Conditioning Chimney VentingCommon Chimney Problems Draft Regulator ControlOIL Tank Piping InstallationMinimum Chimney Base Temperatures F Electrical ConnectionsJust the Blower Speed Neutral Wire normally the white wire is Never Moved to ADCirculating AIR Blower Burner Electrodes ProcedureOIL Burner OIL Burner SET-UPSmoke Test Note Furnace Installation SET-UPStack Temperature Maintenance and Service Operating InstructionsDelavan Table A-1 Beckett OIL Burner SET-UPBTU/Hr Pressure Rate PlateOutput Motor Blower SET-UP Cooling Capacity Furnace Table A-2 Direct Drive Blower SET-UPTable A-3 Belt Drive Blower SET-UP Furnace Motor Temp CFM Blower Rise Speed Table A-4 Direct Drive Blower CharacteristicsTable A-5 Belt Drive Blower Characteristics Model FLAGeneral Dimensions P2LBX16F14501 General Dimensions P4LBX20F19001 General Dimensions P3DHX12F08001 General Dimensions P2DHX16F12001 Page Page R7184 Detailed Sequence of Operation Thermostat calls for heatOperation Preliminary Steps R7184 LED Diagnostic LightR8184N Notes Table C-2 R7184 Troubleshooting But Control locks out and starts Before Oil Table C-3 System and General Troubleshooting Problem Possible Cause RemedyLow oil pump pressure Check stack temperature. Stack temperatures will normally P4LBX20F19001 Assembly Notes P3DHX Series Downflow Configuration NotesP3DHX12F08001 Vestibule KIT Repair Part List P3DHX12F08001A Repair Part List P2DHX16F12001A Repair Part List P2LBX16F14501A Repair Part List P4LB Series Replacement Part Contact Information Page Unitary 5005 Norman Products York Group Drive 73069

P4LBX20F19001, P2DHX16F12001, P3DHX12F08001, P2LBX16F14501 specifications

The York P2LBX16F14501, P3DHX12F08001, P2DHX16F12001, and P4LBX20F19001 are high-performance HVAC units designed to meet diverse heating and cooling needs in both residential and commercial environments. These models are notable for their energy efficiency, advanced technologies, and user-friendly features.

The York P2LBX16F14501 is particularly known for its advanced inverter-driven scroll compressors that offer precise temperature control, enhanced efficiency, and significant noise reduction. This model is equipped with a multi-speed blower that helps maintain consistent airflow while ensuring optimum comfort levels. Its compact design allows for flexible installation options, making it suitable for various applications.

In contrast, the York P3DHX12F08001 focuses on delivering robust heating solutions, incorporating a variable-speed fan motor designed for improved energy savings and optimal performance. This unit excels in environments with fluctuating temperature demands, providing reliable heating without sacrificing energy efficiency. With built-in diagnostics, maintenance becomes more manageable, allowing for timely interventions to prevent excessive downtime.

The York P2DHX16F12001 stands out with its dual-fuel capability, allowing users to seamlessly switch between gas and electric sources depending on the prevailing energy costs. This versatility not only ensures year-round comfort but also offers substantial savings on energy bills. The model's high SEER (Seasonal Energy Efficiency Ratio) rating is indicative of its capability to deliver cooling efficiently during peak summer months.

Lastly, the York P4LBX20F19001 is designed for larger spaces, featuring a higher capacity that makes it ideal for commercial applications. This unit leverages advanced refrigerant technologies, enabling it to operate effectively across a wider range of temperatures. Its intelligent control systems can be integrated with building management systems, providing real-time monitoring and remote access to ensure peak operational efficiency.

All four models share a commitment to sustainable design and longevity, integrating modern materials that enhance durability and reduce the environmental footprint. Each unit is engineered with user comfort and energy efficiency in mind, representing York's dedication to innovation and quality in the HVAC industry.
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