TECHNICAL GUIDE
MODELS: GY8S-DH/LY8S-DH
GAS-FIRED
HIGH EFFICIENCY SINGLE STAGE
DOWNFLOW/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
279747-YTG-A-0407
FOR DISTRIBUTION USE ONLY - NOT TO BE USED AT POINT OF RETAIL SALE
DESCRIPTION
These high efficiency, downflow/horizontal compact units
employ induced combustion, reliable hot surface ignition and
high heat transfer tubular heat exchangers.
These furnaces are designed for residential installation in a
closet, attic or garage and are ideal for commercial applica-
tions. All units 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 ANSI Z223.1 (latest edition).
WARRANTY
20-year limited warranty on the heat exchanger.
10-year heat exchanger warranty on commercial applica-
tions.
5-year limited parts warranty.
FEATURES
•
Downflow/Horizontal models may be easily applied with-
out any field conversion
•
Top vent connection allows installation in narrow loca-
tions
•
Electronic hot surface ignition with high reliability and
dependability
•
100% shut off main gas valve for added safety
•
High quality inducer motor for quiet operation
•
Standard terminals for controlling humidifiers & 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 standard for easy installation of add-on
cooling
•
Blower off-delay for cooling SEER improvement
•
Multi-speed PSC, direct-drive blower motors 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.
