TECHNICAL GUIDE
MODELS: GY8S*UH / LY8S*UH
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.
278436-YTG-A-0407
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.
• All models are propane convertible.
FOR DISTRIBUTION USE ONLY - NOT TO BE USED AT POINT OF RETAIL SALE
278436-YTG-A-0407
B
A
FRONT
3/4
40
20
13-3/4
GAS INLET
1-1/4 x 2-1/2
28-1/2
LEFT SIDE
26-1/2
BOTTOM IMAGE
RETURN END
1-1/2
1-1/4
C
4” Diameter
D
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
24-3/4
TOP IMAGE
SUPPLY END
5/8
5-3/8
2
5/8
B
14
23-1/2
RIGHT SIDE
14-3/4
2-1/4
1-1/8
CABINET AND DUCT DIMENSIONS
Models CFM
Cabinet
Size
ABCD
(G,L)Y8S040A12UH11 1200 A 14 1/2 13 1/4 11 1/2 10 1/8
(G,L)Y8S060A12UH11 1200 A 14 1/2 13 1/4 11 1/2 10 1/8
(G,L)Y8S080A12UH11 1200 A 14 1/2 13 1/4 11 1/2 10 1/8
(G,L)Y8S080B16UH11 1600 B 17 1/2 16 1/4 14 1/2 11 5/8
(G,L)Y8S080C16UH11 1600 C 21 19 3/4 18 13 3/8
GY8S080C22UH11
LY8S080C20UH11
2200
2000
C 21 19 3/4 18 13 3/8
(G,L)Y8S100B12UH11 1200 B 17 1/2 16 1/4 14 1/2 11 5/8
(G,L)Y8S100B16UH11 1600 B 17 1/2 16 1/4 14 1/2 11 5/8
(G,L)Y8S100C16UH11 1600 C 21 19 3/4 18 13 3/8
(G,L)Y8S100C20UH11 2000 C 21 19 3/4 18 13 3/8
GY8S115C16UH11 1600 C 21 19 3/4 18 13 3/8
(G,L)Y8S115C20UH11 2000 C 21 19 3/4 18 13 3/8
(G,L)Y8S130D20UH11 2000 D 24 1/2 23 1/4 21 1/2 15 1/8
Cabinet Dimension
2 Unitary Products Group
RATINGS & PHYSICAL / ELECTRICAL DATA - UPFLOW MODELS
278436-YTG-A-0407
Models
(G,L)Y8S040A12UH11 40 32 1200 14-1/2 9.0 80.0 25-55
(G,L)Y8S060A12UH11 60 48 1200 14-1/2 9.0 80.0 25-55
(G,L)Y8S080A12UH11 80 64 1200 14-1/2 9.0 80.0 35-65
(G,L)Y8S080B16UH11 80 64 1600 17 1/2 12.0 80.0 25-55
(G,L)Y8S080C16UH11 80 64 1600 21 12.0 80.0 25-55
GY8S080C22UH11
LY8S080C20UH11
(G,L)Y8S100B12UH11 100 80 1200 17 1/2 12.0 80.0 40-70
(G,L)Y8S100B16UH11 100 80 1600 17 1/2 12.0 80.0 35-65
(G,L)Y8S100C16UH11 100 80 1600 21 12.0 80.0 35-65
(G,L)Y8S100C20UH11 100 80 2000 21 14.0 80.0 25-55
GY8S115C16UH11 115 92 1600 21 12.0 80.0 35-65
(G,L)Y8S115C20UH11 115 92 2000 21 14.0 80.0 30-60
(G,L)Y8S130D20UH11 130 104 2000 24-1/2 14.0 80.0 35-65
Models
(G,L)Y8S040A12UH11 40 155 1/2 7.1 10 x 8 20 14 105
(G,L)Y8S060A12UH11 60 155 1/2 7.1 10 x 8 20 14 110
(G,L)Y8S080A12UH11 80 170 1/2 7.1 10 x 8 20 14 117
(G,L)Y8S080B16UH11 80 155 3/4 11.5 11 x 8 20 14 126
(G,L)Y8S080C16UH11 80 155 3/4 11.5 10 x 10 20 14 130
GY8S080C22UH11
LY8S080C20UH11
(G,L)Y8S100B12UH11 100 170 1/2 7.1 10 x 8 20 14 128
(G,L)Y8S100B16UH11 100 165 3/4 11.5 11 x 8 20 14 134
(G,L)Y8S100C16UH11 100 165 3/4 11.5 10 x 10 20 14 140
(G,L)Y8S100C20UH11 100 155 1.0 14.0 11 x 11 20 12 145
GY8S115C16UH11 115 170 3/4 11.5 10 x 10 20 14 145
(G,L)Y8S115C20UH11 115 170 1.0 14.0 11 x 11 20 12 147
(G,L)Y8S130D20UH11 130 165 1.0 14.0 11 x 11 20 12 158
Nominal external static pressure is 0.50” w.c. at furnace outlet ahead of cooling coils.
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.
Input Output
MBH MBH CFM In. °F
80 64
Input
MBH °F Hp Amps In. LBS
80 165 1.0 14.0 11 x 11 20 12 140
Max.
Outlet
Air Temp
Nominal
Airflow
2200
2000
Blower
Cabinet
Width
21 14.0 80.0 25-55
Blower
Size
Total Unit
Amps
Max
Over-Current
Protect
AFUE
Min. wire Size
(awg) @ 75 ft
one way
Operation
Air Temp.
Rise
Weight
Unitary Products Group 3