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TECHNICAL GUIDE
80 AFUE
MULTI-POSITION
GAS FURNACES
MODELS: G8C SERIES
4-POSITION
50-125 MBH INPUT
3-POSITION
150 MBH INPUT
FOR DISTRIBUTION USE ONLY - NOT TO BE USED AT POINT OF RETAIL SALE
®
EFFICIENCY
RATING
CERTIFIED
DESCRIPTION
These compact units (31-1/2" high) employ induced combus-
tion, reliable electronic ignition and high heat transfer heat
exchangers. The units may be factory shipped for upflow/hor-
izontal application and converted for downflow application.
These units may also be factory shipped for downflow appli-
cation and converted for upflow/horizontal applications
Note: The 150 MBH input model is upflow/horizontal only and
may not be converted to the downflow position.
These furnaces are designed for residential installation in a
basement, closet, alcove, attic, or garage. 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.
WARRANTY
20-year limited warranty on the heat exchanger.
5-year limited parts warranty.
FEATURES
• 4-position (MU) upflow models allow horizontal-left, hori-
zontal-right, downflow and convertible applications
• 4-position (MD) models allow downflow and convertible
upflow/horizontal applications
• 3-position (UH) 150 MBH input model allows upflow, hori-
zontal-left and horizontal-right application
• Reliable, hot surface ignitor
• Integrated control module for simplicity and reliable, eco-
nomical operation
• Built-in self-diagnostics with fault code display
• 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
• 40 VA, fuse protected control transformer
• Terminals for controlling humidifiers and EAC's
• Easy to connect power and control wiring
• Efficiency ratings of 80 AFUE
• Cooling blower relay supplied 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 31-1/2-in height allows installation in small space
confines
• All models are propane convertible
• Pre-painted exterior provides attractive, durable finish
• Models are not approved for LoNox applications
036-21120-002 Rev. A (1102)
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Table of Contents
Related Manuals for York G8C05012MUB12
Summary of Contents for York G8C05012MUB12
- Page 1 036-21120-002 Rev. A (1102) DESCRIPTION ® These compact units (31-1/2" high) employ induced combus- tion, reliable electronic ignition and high heat transfer heat exchangers. The units may be factory shipped for upflow/hor- izontal application and converted for downflow application. These units may also be factory shipped for downflow appli- cation and converted for upflow/horizontal applications Note: The 150 MBH input model is upflow/horizontal only and TECHNICAL GUIDE...
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Page 2: Furnace Dimensions
036-21120-002 Rev. A (1102) UPFLOW DOWNFLOW 16-1/4 31-1/2 31-1/2 29-3/4 29-3/4 BOTTOM VIEW BOTTOM VIEW FURNACE DIMENSIONS Model K (Vent) G8C05012(MU,MD)B12 17-1/2 16-1/2 20-3/8 14-3/4 18-3/4 15-1/8 G8C07512(MU,MD)B12 17-1/2 16-1/2 20-3/8 14-3/4 18-3/4 15-1/8 G8C07516(MU,MD)C12 20-3/8 19-1/2 18-1/4 18-3/4 18-5/8 G8C10016(MU,MD)C12 20-3/8 19-1/2... -
Page 3: Blower Performance
036-21120-002 Rev. A (1102) BLOWER PERFORMANCE TABLE 1: SINGLE SIDE RETURN - All airflow is expressed in standard cubic feet per minute. Motor rated at 115 volts. No air filters. SPEED EXTERNAL STATIC PRESSURE, INCHES W.C. MODEL HIGH 1411 1360 1289 1218 1154... - Page 4 036-21120-002 Rev. A (1102) TABLE 3: BOTTOM END RETURN - All airflow is expressed in standard cubic feet per minute. Motor rated at 115 volts. No air filters. SPEED EXTERNAL STATIC PRESSURE, INCHES W.C. MODEL HIGH 1419 1357 1297 1212 1131 1050 G8C05012(MU,MD)B12...
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Page 5: Applying Filter Pressure Drop To Determine System Airflow
036-21120-002 Rev. A (1102) TABLE 4: FILTER PERFORMANCE - PRESSURE DROP INCHES W.C. Filter Type Minimum Opening Size (in. Airflow Range Disposable Hogs Hair Pleated 1 Opening 2 Openings 1 Opening 2 Openings 1 Opening 2 Openings 1 Opening 2 Openings 0 - 750 0.01 0.01... -
Page 6: Unit Clearances To Combustibles
036-21120-002 Rev. A (1102) UNIT CLEARANCES TO COMBUSTIBLES Right Floor / Line Application Front Rear Left Side Flue Closet Alcove Attic Side Bottom Contact UPFLOW COMBUSTIBLE UPFLOW COMBUSTIBLE B-VENT HORIZONTAL COMBUSTIBLE YES(See Note HORIZONTAL COMBUSTIBLE YES(See Note B-VENT DOWNFLOW 1" (See Note DOWNFLOW 1"... - Page 7 036-21120-002 Rev. A (1102) NOTES Unitary Products Group...
- Page 8 Subject to change without notice. Printed in U.S.A. 036-21120-002 Rev. A (1102) Copyright © by York International Corp. 2002. All rights reserved. Supersedes: 036-21120-001 Rev. A (0201) Unitary 5005 Norman Products York Group Drive 73069...