York GY9S User Manual

105561-UIM-B-0605
HIGH EFFICIENCY
TUBULAR HEAT EXCHANGER SERIES
MODELS: GY9S / GM9S / GF9S
(Single Stage Upflow)
40 - 135 MBH INPUT
(11.7 - 39.6 KW) INPUT
INSTALLATION MANUAL
EFFICIENCY
RATING
CERTIFIED
ISO 9001
Certified Quality
Management System
SECTION I: SAFETY
This is a safety alert symbol. When you see this symbol on
labels or in manuals, be alert to the potential for personal
injury.
Understand and pay particular attention to the signal words DANGER,
WARNING, or CAUTION.
DANGER indicates an imminently hazardous situation, which, if not
avoided, will result in death or serious injury
.
WARNING indicates a potentially hazardous situation, which, if not
avoided, could result in death or serious injury
.
CAUTION indicates a potentially hazardous situation, which, if not
avoided may result in minor or moderate injury.
It is also used to
alert against unsafe practices and hazards involving only property dam-
age.
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 mainte-
nance can cause injury or property damage. Refer to this manual
for assistance or for additional information, consult a qualified con-
tractor, installer or service agency.
This product must be installed in strict compliance with the installa-
tion instructions and any applicable local, state, and national codes
including, but not limited to building, electrical, and mechanical
codes.
LIST OF SECTIONS
SAFETY . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1
DUCTWORK . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3
FILTERS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6
GAS PIPING . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6
ELECTRICAL POWER . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8
TWINNING AND STAGING . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9
COMBUSTION AIR AND VENT SYSTEM . . . . . . . . . . . . . . . . . . . . .11
CONDENSATE PIPING . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .18
SAFETY CONTROLS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .18
START-UP AND ADJUSTMENTS . . . . . . . . . . . . . . . . . . . . . . . . . . .19
WIRING DIAGRAM . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .25
LIST OF FIGURES
Dimensions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5
Furnace Base Rectangular Blockoff Panel . . . . . . . . . . . . . . . . . . . . . 6
Gas Valve . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6
Gas Piping . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6
Electrical Wiring . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8
Line Wiring Connections . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9
Single Stage Heat Thermostat Connections . . . . . . . . . . . . . . . . . . . . 9
Accessory Connections . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9
Typical Twinned Furnace Application . . . . . . . . . . . . . . . . . . . . . . . . 10
Single Stage Twinning Wiring Diagram . . . . . . . . . . . . . . . . . . . . . . . 10
Two-Stage Twinning Wiring Diagram . . . . . . . . . . . . . . . . . . . . . . . . . 11
Home Layout . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13
Termination Configuration - 1 Pipe . . . . . . . . . . . . . . . . . . . . . . . . . . 14
Termination Configuration - 2 Pipe . . . . . . . . . . . . . . . . . . . . . . . . . . 14
Termination Configuration - 2 Pipe Basement . . . . . . . . . . . . . . . . . .14
Double Horizontal Sealed Combustion Air and Vent Termination . . .15
Double Vertical Sealed Combustion Air and Vent Termination . . . . .15
Sealed Combustion Air Intake Connection and Vent Connection . . .15
Combustion Airflow Path Through The Furnace Casing . . . . . . . . . .15
Outside and Ambient Combustion Air . . . . . . . . . . . . . . . . . . . . . . . . .17
Attic and Crawl Space Combustion Air Termination . . . . . . . . . . . . . .18
Condensate Piping . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .18
Pressure Switch Tube Routing . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .19
Gas Valve . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .21
Reading Gas Pressure . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .22
Typical Heat/Cool Speed Tap Connections . . . . . . . . . . . . . . . . . . . .22
Wiring Diagram . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .25
LIST OF TABLES
Unit Clearances to Combustibles . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3
Minimum Duct Sizing For Proper Airflow . . . . . . . . . . . . . . . . . . . . . . . 4
Round Duct Size . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4
Filter Sizes . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6
High Altitude Conversion (40-120 MBTUH Models) . . . . . . . . . . . . . . . 7
High Altitude Conversion (135 MBTUH Models) . . . . . . . . . . . . . . . . . 7
Electrical and Performance Data . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8
Combustion Air Intake and Vent Connection Size at Furnace
(All Models) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11
Combustion Air Supply and Vent Piping . . . . . . . . . . . . . . . . . . . . . . .12
Estimated Free Area . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .16
Free Area . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .16
Unconfined Space Minimum Area in Square Inch . . . . . . . . . . . . . . .16
Inlet Gas Pressure Range . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .21
Nominal Manifold Pressure . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .21
Blower Performance CFM . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .23
Filter Performance - Pressure Drop Inches W.C. and (kPa) . . . . . . . .23

York GY9S Specifications

General

Fuel Type	Natural Gas
Stages	Single Stage
Ignition	Hot Surface Ignition
AFUE Rating	96%
Heating Capacity	40, 000 - 120, 000 BTU/h
Heat Exchanger	Aluminized Steel
Warranty	10-Year Parts, Lifetime Heat Exchanger

Summary

SECTION I: SAFETY

SPECIFIC SAFETY RULES AND PRECAUTIONS

SAFETY REQUIREMENTS

Outlines compliance with national and local building safety codes and standards.

COMBUSTION AIR QUALITY

Chemical Exposure

Details substances requiring outdoor air for combustion due to potential damage.

FURNACE LOCATION AND CLEARANCES

Installation in freezing temperatures

Guidelines for installing the furnace in areas subject to freezing conditions.

SECTION II: DUCTWORK

DUCTWORK GENERAL INFORMATION

General guidelines for designing and installing duct systems for optimal furnace operation.

DUCTWORK INSTALLATION AND SUPPLY PLENUM CONNECTION

BOTTOM RETURN AND ATTIC INSTALLATIONS

SECTION III: FILTERS

FILTER INSTALLATION

Procedures for installing furnace filters externally to the cabinet.

SECTION IV: GAS PIPING

GAS SAFETY

Critical safety warnings related to gas pressure and connections.

GAS ORIFICE CONVERSION

PROPANE (LP) AND HIGH ALTITUDE CONVERSION

Procedures for converting furnace for propane gas and high altitude installations.

SECTION V: ELECTRICAL POWER

ELECTRICAL POWER CONNECTIONS

Guidelines for making safe and compliant electrical connections to the furnace.

LOW VOLTAGE CONTROL WIRING CONNECTIONS

SECTION VI: TWINNING AND STAGING

Single-Wire Twinning

How to connect two furnaces for simultaneous operation using a single wire.

STAGING

Using twinning features for staged heating control with multiple furnaces.

SECTION VII: COMBUSTION AIR AND VENT SYSTEM

COMBUSTION AIR AND VENT SAFETY

Safety precautions for installing combustion air and vent systems.

VENT CLEARANCES

VENT SYSTEM CONFIGURATIONS

HORIZONTAL VENT APPLICATIONS AND TERMINATION

Considerations for locating and terminating horizontal vent systems.

COMBUSTION AIR SUPPLY OPTIONS

OUTDOOR COMBUSTION AIR

Requirements for supplying combustion air from outdoors via sealed pipes.

SECTION VIII: CONDENSATE PIPING

CONDENSATE DRAIN

Proper filling and connection of the condensate trap and drain line.

SECTION IX: SAFETY CONTROLS

PRESSURE SWITCHES

Role of pressure switches in monitoring the combustion air/vent piping system.

LIMIT CONTROLS

SECTION X: START-UP AND ADJUSTMENTS

IGNITION SYSTEM SEQUENCE

Step-by-step process of the furnace ignition sequence.

ADJUSTMENT OF MANIFOLD GAS PRESSURE

ADJUSTMENT OF TEMPERATURE RISE

APPLYING FILTER PRESSURE DROP TO DETERMINE SYSTEM AIRFLOW

SECTION XI: WIRING DIAGRAM