TECHNICAL GUIDE
80 AFUE DELUXE TWO STAGE
MULTI-POSITION
GAS-FIRED FURNACES
57-120 MBH INPUT
MID-EFFICIENCY
INDUCED COMBUSTION
MODELS: G8D-UH / L8D-UH
036-21013-002 Rev. A (5/00)
FOR DISTRIBUTION USE ONLY - NOT TO BE USED AT POINT OF RETAIL SALE
DESCRIPTION
These hi
h efficiency, compact units employ induced combustion,
reliable hot surface i
nition and hi
h heat transfer tubular heat
exchan
ers. The units are factory shipped for installation in upflow
or horizontal applications.
These furnaces are desi
ned for residential installation in a base-
ment, closet, alcove, attic, recreation room or
ara
e and are also
ideal for commercial applications. All units are factory assembled,
wired and tested to assure safe dependable and economical instal-
lation and operation.
These units are available in standard natural
as or dedicated
LoNox models.
These units are Cate
ory I listed and may be common vented with
another
as appliance as allowed by the National Fuel Gas Code
ANSI Z223.1 (latest edition).
WARRANTY
FEATURES
•Two sta
e heatin
operation includes:
- Two sta
e
as valve
- Two sta
e inducer operation
- Two speed blower operation
This provides both increased comfort level and very quiet unit
operation
• Delay timer allows two sta
e operation with sin
le sta
e
thermostat
• Acoustically insulated blower compartment for reduced blower
sound level
• Humidifier and Electronic Air Cleaner control wires are pro-
vided to the power wirin
box for easy field connection.
• 100% shut off main
as valve for added safety
• Easily applied in upflow, horizontal left or horizontal ri
ht
installation with no conversion necessary
• Dedicated LoNox models
• Rollout safety control
• Low unit amp requirement for easy replacement application
•Hi
h quality two speed inducer motor for quiet operation
• Built-in self dia
nostics with fault code display
•Hi
h velocity filter provided for field installation
• 40 VA control transformer fuse protected
• Coolin
relay supplied for easy installation of add-on coolin
• Multi-speed PSC, direct-drive blower motor to match coolin
reuirements
• Adjustable fan-off settin
s to eliminate “cold-blow”
• Compact 40-in. hei
ht allows installation in small space
confines
• All models are propane convertible, except LoNox models
20-
ear limited warrant
on the heat exchan
er.
10-
ear heat exchan
er warrant
on commercial applications.
5-
ear limited parts warrant
.