York LP9C Series User Manual

1083292-UIM-A-0114
When paired with a
York heat pump
MODULATING ECM
RESIDENTIAL GAS FURNACES
MODELS: TP9C, YP9C, CP9C, and
LP9C Series
(Up to 98% AFUE Multi-position)
INSTALLATION MANUAL
LIST OF SECTIONS
SAFETY . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2
DUCTWORK . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5
FILTERS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9
GAS PIPING . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10
ELECTRICAL POWER . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11
CONDENSATE PIPING AND FURNACE
VENTING CONFIGURATION . . . . . . . . . . . . . . . . . . . . . . . . . . 21
COMBUSTION AIR AND VENT SYSTEM . . . . . . . . . . . . . . . . 27
START-UP AND ADJUSTMENTS . . . . . . . . . . . . . . . . . . . . . . 35
SAFETY CONTROLS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 40
NORMAL OPERATION AND DIAGNOSTICS . . . . . . . . . . . . . 40
REPLACEMENT PARTS LIST . . . . . . . . . . . . . . . . . . . . . . . . . 42
REPLACEMENT PART CONTACT INFORMATION . . . . . . . . 42
WIRING DIAGRAM . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 43
START UP SHEET . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 45
LIST OF FIGURES
Duct Attachment . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5
Combustible Floor Base Accessory . . . . . . . . . . . . . . . . . . . . . . . 6
Horizontal Application (Typical) . . . . . . . . . . . . . . . . . . . . . . . . . . 6
Typical Attic Installation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6
Typical Suspended Furnace / Crawl Space Installation . . . . . . . 7
Downflow Venting . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7
Vertical Applications (Typical) . . . . . . . . . . . . . . . . . . . . . . . . . . . 7
Coil Cabinet Attachment Flanges . . . . . . . . . . . . . . . . . . . . . . . . . . 7
Horizontal Right Application (Typical) . . . . . . . . . . . . . . . . . . . . . 8
Horizontal Left Application . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8
PC Series Upflow Coil Installation . . . . . . . . . . . . . . . . . . . . . . . . 8
Horizontal Left or Right application (Right Shown) . . . . . . . . . . . 8
Dimensions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9
Side Return Cutout Markings . . . . . . . . . . . . . . . . . . . . . . . . . . . 9
Gas Valve . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10
Gas Piping . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10
Electrical Wiring . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12
Furnace Control Board – Communications Connections . . . . . 13
Modulating Furnace with Communicating AC or HP . . . . . . . . . 14
Modulating Furnace with Communicating Thermostat
and Non-Communicating AC . . . . . . . . . . . . . . . . . . . . . . . . . . . 14
Terminal Screw Wire Connection. . . . . . . . . . . . . . . . . . . . . . . 14
Thermostat Chart - Single Stage Air Conditioner –
Variable Speed Modulating Furnace . . . . . . . . . . . . . . . . . . . . . 15
Thermostat Chart - Two Stage Air Conditioner –
Variable Speed Modulating Furnace . . . . . . . . . . . . . . . . . . . . . 16
Thermostat Chart - Two Stage Air Conditioner with Single
Stage Thermostat – Variable Speed Modulating Furnace . . . . . 17
Thermostat Chart - Single Stage Heat Pump –
Variable Speed Modulating Furnace . . . . . . . . . . . . . . . . . . . . . 18
Thermostat Chart - Single Stage Heat Pump –
Variable Speed Modulating Furnace . . . . . . . . . . . . . . . . . . . . . 19
Thermostat Chart - Two Stage Heat Pump –
Variable Speed Modulating Furnace . . . . . . . . . . . . . . . . . . . . . 20
Typical Condensate Drain, Vertical Installation . . . . . . . . . . . . . 22
Upflow Configuration . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 23
Downflow Configuration . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 24
Horizontal Left Configuration . . . . . . . . . . . . . . . . . . . . . . . . . . . 25
Horizontal Right Configuration . . . . . . . . . . . . . . . . . . . . . . . . . 26
Dimensions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 29
Home Layout . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 30
Termination Configuration - 1 Pipe . . . . . . . . . . . . . . . . . . . . . . 31
Termination Configuration - 2 Pipe . . . . . . . . . . . . . . . . . . . . . . 31
Termination Configuration - 2 Pipe Basement . . . . . . . . . . . . . 31
Double Horizontal Combustion Air Intake and
Vent Termination . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 32
Double Vertical Combustion Air Intake and
Vent Termination . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 32
Downward Venting . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 32
Direct Vent Air Intake Connection and Vent Connection . . . . . . 32
Combustion Airflow Path Through The Furnace Casing . . . . . . 33
Ambient Combustion Air . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 33
Attic and Crawl Space Combustion Air Termination . . . . . . . . . 35
Gas Valve . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 37
Furnace Control Board . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 38
Wiring Diagram . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 43
LIST OF TABLES
Unit Clearances to Combustibles . . . . . . . . . . . . . . . . . . . . . . . . 4
Coil Projection Dimensions - PC Series Coils . . . . . . . . . . . . . . . 8
Cabinet and Duct Dimensions . . . . . . . . . . . . . . . . . . . . . . . . . . . 9
Recommended Filter Sizes (High Velocity 600 FPM) . . . . . . . . . 9
High Altitude Orifices . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11
Ratings & Physical / Electrical Data . . . . . . . . . . . . . . . . . . . . . 12
Maximum Equivalent Pipe Length . . . . . . . . . . . . . . . . . . . . . . . 28
Elbow Dimensions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 29
Equivalent Length of Fittings . . . . . . . . . . . . . . . . . . . . . . . . . . . 29
Combustion Air Intake and Vent Connection
Size at Furnace (All Models) . . . . . . . . . . . . . . . . . . . . . . . . . . . 29
Estimated Free Area . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 33
Unconfined Space Minimum Area . . . . . . . . . . . . . . . . . . . . . . . 33
Free Area . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 33
Gas Rate (CU FT/HR) at Full Input . . . . . . . . . . . . . . . . . . . . . . 36
Inlet Gas Pressure Range . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 37
Nominal Manifold Pressure . . . . . . . . . . . . . . . . . . . . . . . . . . . . 37
Blower Performance CFM - Any Position . . . . . . . . . . . . . . . . . 39

York LP9C Series Specifications

General

Model	LP9C Series
Heating Capacity	40, 000 to 120, 000 BTU/h
Ignition Type	Hot Surface Ignition
Heat Exchanger Material	Stainless Steel
Fuel Type	Natural Gas or Propane
Blower Type	Variable Speed
Blower Motor	ECM (Electronically Commutated Motor)
Cabinet Type	Heavy-gauge steel
Warranty	10-Year Parts, Lifetime Heat Exchanger

Summary

SECTION I: SAFETY

SPECIFIC SAFETY RULES AND PRECAUTIONS

Essential safety guidelines for furnace installation and operation.

SAFETY REQUIREMENTS

Mandatory safety standards and precautions for installation.

SECTION II: DUCTWORK

DUCTWORK GENERAL INFORMATION

Guidelines for designing and installing duct systems for optimal furnace performance.

DUCTWORK INSTALLATION AND SUPPLY PLENUM CONNECTION - UPFLOW/HORIZONTAL

How to connect supply plenums for upflow/horizontal furnace configurations.

FLOOR BASE AND DUCTWORK INSTALLATION - DOWNFLOW

Installing floor bases and ductwork for downflow furnace configurations.

COIL INSTALLATION

FURNACE ASSEMBLY - MC & FC SERIES COILS

Procedures for assembling MC and FC series coils with furnaces.

FURNACE ASSEMBLY - PC SERIES COILS

Instructions for installing PC series coils on upflow furnaces.

COIL/FURNACE ASSEMBLY - HD SERIES COILS

Connecting HD series coils, noting direction sensitivity.

SECTION III: FILTERS

FILTER INSTALLATION

Requirements for installing field-supplied filters externally to the furnace.

SIDE RETURN

How to locate and install side return cutouts and filter racks.

SECTION IV: GAS PIPING

GAS SAFETY

Critical safety warnings and procedures related to gas piping.

GAS PIPING INSTALLATION

Guidelines for installing gas piping, including material and leak testing.

HIGH ALTITUDE NATURAL GAS ORIFICE CONVERSION

Adjusting orifices for proper operation at high altitudes.

SECTION V: ELECTRICAL POWER

ELECTRICAL POWER CONNECTIONS

Requirements for making safe electrical power connections.

CONTROL WIRING

Wiring the furnace control board for various system configurations.

CONVENTIONAL LOW VOLTAGE CONTROL WIRING CONNECTIONS

Wiring for conventional low voltage thermostats.

AIR CONDITIONER CONNECTIONS

Connecting single-stage and two-stage air conditioners.

SECTION VI: CONDENSATE PIPING AND FURNACE VENTING CONFIGURATION

CONDENSATE DRAIN LOCATION

How to route and connect the condensate drain line.

HEAT PUMP OPERATION

Integrating the furnace with heat pumps for dual fuel applications.

SECTION VII: COMBUSTION AIR AND VENT SYSTEM

COMBUSTION AIR AND VENT SAFETY

Safety precautions for combustion air and vent system installation.

COMBUSTION AIR/VENT PIPE SIZING

Determining the correct pipe size for intake and vent systems.

COMBUSTION AIR AND VENT PIPING ASSEMBLY

Procedures for assembling combustion air and vent piping.

Direct Vent Terminal Clearances

Required clearances for direct vent terminal locations.

VENT APPLICATIONS AND TERMINATION

Selecting locations and considerations for vent terminations.

DOWNWARD VENTING

Rules for installing vent pipes and intake downwards.

COMBUSTION AIR SUPPLY

Requirements for providing combustion air from various sources.

SECTION VIII: START-UP AND ADJUSTMENTS

GAS PIPING LEAK CHECK

Procedures for checking gas piping for leaks after installation.

SETUP TEST MODE

Using test mode to verify furnace operation and settings.

CALCULATING THE FURNACE INPUT (NAT. GAS)

Method for calculating natural gas input based on meter readings.

ADJUSTMENT OF MANIFOLD GAS PRESSURE

Setting the manifold gas pressure for correct furnace operation.

ADJUSTMENT OF TEMPERATURE RISE

Adjusting fan speed to achieve the correct temperature rise.

SECTION IX: SAFETY CONTROLS

ROLLOUT SWITCH CONTROLS

Function of rollout switches and when they de-energize the gas valve.

PRESSURE CONTROLS

How pressure sensors and switches monitor airflow and venting.

LIMIT CONTROLS

Function of high temperature limit controls and temperature sensors.

SECTION X: NORMAL OPERATION AND DIAGNOSTICS

NORMAL OPERATION SEQUENCE

Step-by-step process of furnace startup and operation.

TROUBLESHOOTING

General checks and common fault conditions for troubleshooting.

FURNACE CONTROL DIAGNOSTICS

Understanding fault codes indicated by the control board's LED.

SECTION XI: REPLACEMENT PARTS LIST

REPLACEMENT PART CONTACT INFORMATION

How to obtain a complete parts list and contact the manufacturer.

SECTION XII: WIRING DIAGRAM

SECTION XIII: START UP SHEET

Gas Side

Recording gas type, pressures, and calculated input.

Air Side: Heating

Recording heating settings like ATR and temperature rise.

Air Side: Cooling

Setting blower speed settings for cooling operations.

Owner Education

Providing information and training to the equipment owner.