TECHNICAL GUIDE
80 AFUE
MULTI-POSITION
GAS FURNACES
MODELS: G8C SERIES
4-POSITION
50-125 MBH INPUT
3-POSITION
150 MBH INPUT
EFFICIENCY
RATING
CERTIFIED
036-21120-002 Rev. A (1102)
FOR DISTRIBUTION USE ONLY - NOT TO BE USED AT POINT OF RETAIL SALE
®
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
