York LY8S User Manual
TECHNICAL GUIDE
MODELS: GY8S/LY8S
GAS-FIRED
HIGH EFFICIENCY SINGLE STAGE
UPFLOW/HORIZONTAL FURNACES
STANDARD & Low NOx
NATURAL GAS
40 - 130 MBH INPUT
EFFICIENCY
RATING
CERTIFIED
ISO 9001
Certified Quality
Management System
Due to continuous product improvement, specifications are subject to change without notic e.
Visit us on the web at www.york.com for the most
up-to-date technical information.
Additional information can be found at
www.gamanet.org.
036-21618-003 Rev. A (1205)
DESCRIPTION
These high efficiency, compact units employ induced combustion, reliable hot surface ignition and high heat transfer
aluminized tubular heat exchangers. The units are factory
shipped for installation in upflow or horizontal applications.
These furnaces are designed for residential installation in a
basement, closet, alcove, attic, recreation room or garage
and are also ideal for commercial applications. All u nits are
factory assembled, wired and tested to assure safe dependable and economical installation and operation.
These units are Category I listed and may be common vented
with another gas appliance as allowed by the National Fuel
Gas Code.
WARRANTY
20-year limited warranty on the heat exchanger.
10-year heat exchanger warranty on commercial applica-
tions.
5-year limited parts warranty.
FEATURES
• Easily applied in upflow, horizontal left or horizontal right
installation with no conversion necessary.
• 100% shut off main gas valve for added safety.
• Rollout safety control.
• Low unit amp requirement for easy application.
• High quality inducer motor for quiet operation.
• Built-in self diagnostics with fault code display.
• Electronic Hot Surface Ignition saves fuel cost with
increased dependability and reliability.
• Standard terminals for controlling humidifiers and EAC's.
• 40 VA control transformer fuse protected.
• Easy to connect power and control wiring.
• Efficiency ratings of 80 AFUE attained by using tubular
heat exchangers.
• Cooling relay supplied for easy installation of add-on
cooling.
• Multi-speed PSC, large, quiet direct-drive blower motor
to match cooling requirements.
• Adjustable fan-off settings to eliminate “cold-blow”.
• Compact 40-in height allows installation in small space
confines.
• Low NOx models have been designed to meet specific
code requirements. Low NOx units may not be converted
to propane.
FOR DISTRIBUTION USE ONLY - NOT TO BE USED AT POINT OF RETAIL SALE
036-21618-003 Rev. A (1205)
B
A
FRONT
3/4
40
20
13-3/4
GAS INLET
1-1/4 x 2-1/2
28-1/2
LEFT SIDE
26-3/4
1-3/8
1-1/4
4” Diameter
(VENT CONNECTIONS)
POWER WIRING
7/8” HOLE
2-1/2
32-1/2
ACCESS
WIRING
7/8” K.O.
16
8-3/4
T’STAT WIRING 7/8” K.O.
20
5/8
5-3/8
2
14
5/8
14-3/4
23-1/2
RIGHT SIDE
2-1/4
1-1/8
BOTTOM IMAGE
RETURN END
C
4” Diameter
D
24-3/4
TOP IMAGE
SUPPLY END
B
CABINET AND DUCT DIMENSIONS
Models CFM
Cabinet
Size
ABCD
(G,L)Y8S040A12UH11 1200 A 14 1/2 13 1/4 10 1/8 10 1/8
(G,L)Y8S060A12UH11 1200 A 14 1/2 13 1/4 10 1/8 10 1/8
(G,L)Y8S080A12UH11 1200 A 14 1/2 13 1/4 10 1/8 10 1/8
(G,L)Y8S080B16UH11 1600 B 17 1/2 16 1/4 13 1/8 11 5/8
GY8S080C22UH11
LY8S080C20UH11
2200 C 21 19 3/4 16 5/8 13 3/8
(G,L)Y8S100B12UH11 1200 B 17 1/2 16 1/4 13 1/8 11 5/8
(G,L)Y8S100B16UH11 1600 B 17 1/2 16 1/4 13 1/8 11 5/8
(G,L)Y8S100C20UH11 2000 C 21 19 3/4 16 5/8 13 3/8
GY8S115C16UH11 1600 C 21 19 3/4 16 5/8 13 3/8
(G,L)Y8S115C20UH11 2000 C 21 19 3/4 16 5/8 13 3/8
(G,L)Y8S130D20UH11 2000 D 24 1/2 23 1/4 20 1/8 15 1/8
Cabinet Dimension
2 Unitary Products Group
RATINGS & PHYSICAL / ELECTRICAL DATA - UPFLOW MODELS
036-21618-003 Rev. A (1205)
Models
(G,L)Y8S040A12UH11 40 32 14-1/2 1200 9.0 80.0 25-55
(G,L)Y8S060A12UH11 60 48 14-1/2 1200 9.0 80.0 25-55
(G,L)Y8S080A12UH11 80 64 14-1/2 1200 9.0 80.0 35-65
(G,L)Y8S080B16UH11 80 64 17-1/2 1600 12.0 80.0 25-55
GY8S080C22UH11
LY8S080C20UH11
(G,L)Y8S100B12UH11 100 80 17-1/2 1200 12.0 80.0 40-70
(G,L)Y8S100B16UH11 100 80 17-1/2 1600 12.0 80.0 35-65
(G,L)Y8S100C20UH11 100 80 21 2000 14.0 80.0 25-55
GY8S115C16UH11 115 92 21 1600 12.0 80.0 35-65
(G,L)Y8S115C20UH11 115 92 21 2000 14.0 80.0 30-60
(G,L)Y8S130D20UH11 130 104 24-1/2 2000 14.0 80.0 35-65
Models
(G,L)Y8S040A12UH11 155 1/2 7.1 10 x 8 20 14 105
(G,L)Y8S060A12UH11 155 1/2 7.1 10 x 8 20 14 110
(G,L)Y8S080A12UH11 170 1/2 7.1 10 x 8 20 14 117
(G,L)Y8S080B16UH11 155 3/4 11.5 11 x 8 20 14 126
GY8S080C22UH11
LY8S080C20UH11
(G,L)Y8S100B12UH11 170 1/2 7.1 10 x 8 20 14 128
(G,L)Y8S100B16UH11 165 3/4 11.5 11 x 8 20 14 134
(G,L)Y8S100C20UH11 155 1.0 14.0 11 x 11 20 12 145
GY8S115C16UH11 170 3/4 11.5 10 x 10 20 14 145
(G,L)Y8S115C20UH11 170 1.0 14.0 11 x 11 20 12 147
(G,L)Y8S130D20UH11 165 1.0 14.0 11 x 11 20 12 158
Annual Fuel Utilization Efficiency (AFUE) numbers are determined in accordance with DOE Test procedures.
Wire size and over current protection must comply with the National Electrical Code (NFPA-70-latest edition) and all local codes.
The furnace shall be installed so that the electrical components are protected from water.
Input Output Cabinet Width
MBH MBH In. CFM % °F
80 64 21 2200 14.0 80.0 25-55
Max. Outlet
Air Temp
°F Hp Amps In. LBS
165 1.0 14.0 11 x 11 20 12 140
Blower Blower Size
Nominal
Airflow
Total Unit Amps
Max
Over-Current
Protect
AFUE Air Temp. Rise
Min. wire Size
(awg) @ 75 ft
one way
Operation
WGT.
Unitary Products Group 3
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