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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

Due to continuous product improvement, specifica-
tions are subject to change without notice.

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.

EFFICIENCY
RATING
CERTIFIED

ISO 9001

Certified Quality

Management System

278436-YTG-A-0407

FOR DISTRIBUTION USE ONLY - NOT TO BE USED AT POINT OF RETAIL SALE

DESCRIPTION

These high efficiency, compact units employ induced com-
bustion, 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 units are
factory assembled, wired and tested to assure safe depend-
able 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.

Summary of Contents for GY8S*UH Series

Page 1: ...hese 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 excha...

Page 2: ...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...

Page 3: ...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 92 200...

Page 4: ...970 1840 1730 1680 1570 1460 1260 Medium Low 1720 1700 1670 1620 1570 1500 1430 1310 1160 1000 Low 1410 1390 1360 1330 1280 1220 1170 1060 930 840 G L Y8S100B12UH11 High 1700 1620 1560 1480 1390 1300...

Page 5: ...High 2710 2640 2560 2480 2360 2260 2160 2010 1860 1650 Medium High 2110 2110 2070 2030 1980 1910 1850 1710 1570 1300 Medium Low 1690 1690 1650 1610 1540 1480 1410 1280 1170 1030 Low 1350 1330 1310 129...

Page 6: ...ters may not exceed 300 feet per minute All velocities over this require the use of high velocity filters 2 Air flows above 1800 CFM require either return from two sides or one side plus bottom RECOMM...

Page 7: ...ool Y Y2 Single Second Stage Cool Y Single Stage Cool DN11C00124 C 24 Volt Common C 24 Volt Common Optional w Batteries BN11C01124 DP11C40124 PSC FURNACE CONTROL SINGLE STAGE AIR CONDITIONING BN11C001...

Page 8: ...CFM 33 4 m3 min Subtract the airflow 0 50 w c 125 Pa from the airflow 0 60 w c 150 Pa to obtain airflow difference 1180 1250 70 CFM 12 m3 min Subtract the total system static from 0 50 w c 125 Pa and...

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