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GAS FURNACES
Single Stage, Two-Stage, and Modulating
Furnaces
*SK/*TK Downflow
95.1% AFUE Condensing
Furnaces
*TC Upflow/Horizontal
*TL Downfiow
_SL
Downflow
97%+ AFUE Modulating
Furnaces
*MQ Upflow/Horizontal
FiRE OR EXPLOSION HAZARD
= Failure
to follow
safety
warnings
e×actly
could
result
in serious
injury or property
damage.
= Installation
and service
must
be performed
by a qualified
installer,
service
agency
or
the gas supplier.
= Do not store
or use gasoline
or other
flammable
vapors
and liquids
in the
vicinity
of this or any other appliance.
WHAT TO DO IF YOU SMELL GAS
= DO not try to light any appliance.
= Do not touch
any electrical
switch;
do not
use any phone in your building.
= Leave the building
immediately.
= Immediately
call your gas supplier
from
a
neighbors
phone.
Follow the gas suppliers
instructions.
= if you cannot
reach
your
gas supplier,
call
the fire department.
_'_92.1%, 95.1% and 97%+ AFUE Models Only
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Table of Contents
Related Manuals for Nordyne FG7SA-045C-23A
Summary of Contents for Nordyne FG7SA-045C-23A
- Page 1 GAS FURNACES Single Stage, Two-Stage, and Modulating Furnaces *SK/*TK Downflow Downflow 95.1% AFUE Condensing Furnaces *TC Upflow/Horizontal *TL Downfiow 97%+ AFUE Modulating Furnaces *MQ Upflow/Horizontal FiRE OR EXPLOSION HAZARD WHAT TO DO IF YOU SMELL GAS = Failure to follow safety warnings e×actly...
- Page 3 Congratulations on the purchase on your new furnace! With our dedication to quality, superior reliability, and outstanding warranty, we know you will be pleased with this new appliance. This furnace has been designed and built to provide many years of safe and dependable home comfort, providing it is properly...
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Page 4: Clearances To Combustibles
CLEARANCES TO COMBUSTIBLES Safety markings are used frequently throughout this manual to designate a degree or level of seriousness and The furnace is designed to have certain clearances to should not be ignored. WARNING indicates a potentially combustible items such as wood, paper, etc. Some types hazardous situation that if not avoided, could result in of insulation are combustible. - Page 5 Newor newlyrenovated homesmay requiremore WARNING: frequentchanginguntilthe construction dust has minimized. Filters designed t oremove s maller p articles furnace shipped from factory suchaspollen, m ayrequire additional maintenance. equipped to operate on natural gas. Conversion GASSUPPLY AND PIPING LP/propane must be performed by a This furnace does not have a pilot.
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Page 6: Venting System
Thefurnace components shown onpages 9 - 11 will help Category IV Furnaces to identify and locate various parts of the furnace. The Category IV furnaces typically have an AFUE rating over component you need to familiarize yourself with is the 90% and are mainly vented through plastic PVC pipe. -
Page 7: Starting T Hefurnace
STARTING T HEFURNACE: 12.Turn thethermostat backuptoforceignition. 1. Makesurethefilteriscleanandinplace. 13.Observe operation, including burners. I f burners fail 2. Makesuretheventsystem is properly installed. toignite, c alla licensed HVAC technician. 3. Setthethermostat tothe lowest s etting. 14. Replace t hedoorontheburner compartment. 4. Close themanual gasvalveoutside thefurnace. SHUTTING DOWN THEFURNACE: 5. - Page 8 Verify furnace areais freeofcombustible materials. Verify combustion andventilation a ir is notrestricted. Verify nosignsofphysical deterioration ofthefurnace. Verify noobstructions or restrictions i n ventor chimney. Verify noholes or cracks inventpipe. Verify nocorrosion inventpipe. Verify the horizontal ventpipesslope upwards a wayfromfurnace. Verify burner f lame. Cleanor replace filter(s).
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Page 9: Furnace Components
LOCATION OF SINGLE-STAGE FURNACE COMPONENTS *SA 80+ Upflow/Horizontal Gas Furnace *SK 80+ Downflow Gas Furnace Blower Assembly Flame Rollout Switch Gas Valve Pressure Switch Blower Door Switch Flame Sensor Igniter Transformer Burner Assembly Furnace Control Board Inducer Assembly Combustion Tube Gas Manifold Limit Switch .... -
Page 10: Two-Stage Furnace Components
LOCATION OF TWO-STAGE FURNACE COMPONENTS *TA 80+ Upflow/Horizontal Gas Furnace *TK 80+ Downflow Gas Furnace Blower Assembly Flame Rollout Switch Gas VaNe Motor Choke . Blower Door Switch _ Flame Sensor . Igniter _M°t°r Control Board Burner Assembly Furnace Control Board Inducer Assembly Pressure Switch Combustion Tube... -
Page 11: Location Of Modulating Furnace Components
LOCATION OF MODULATING FURNACE COMPONENTS Blower Assembly Blower Door Switch Burner Assembly Finish Flange ® Flame Roll-Out Switch Flame Sensor © Furnace Control Board Gas Manifold Gas Valve Igniter Inducer Assembly Inducer Limit Switch Motor Choke (c andDcabinets only) Motor Control Board Motor Control Box Pressure Switches Transformer... - Page 12 RATING !1 I !1 IIIlll IEIIIill Illll 7089670 NORD_E Specifications and illustrations subject to change without notice or incurring obligations. 708967 O'Fallon, MO Printed in U.S.A. (10/08)