Nortek SC Series Installation Instructions Manual
  1. Manuals
  2. Brands
  3. Nortek Manuals
  4. Furnace
  5. SC Series
  6. Installation instructions manual

Nortek SC Series Installation Instructions Manual

Single stage condensing gas furnaces
Hide thumbs Also See for SC Series:
Table of Contents

Advertisement

Quick Links

Download this manual
Single Stage Condensing Gas Furnaces
INSTALLATION INSTRUCTIONS
*SC (92.1%AFUE)
Upflow / Horizontal Furnace
• Failure to follow safety warnings exactly could result in serious injury, death 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.
• 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.
DO NOT DESTROY. PLEASE READ CAREFULLY & KEEP IN A SAFE PLACE FOR FUTURE REFERENCE.
OBSOLETE
Upflow / Horizontal Furnace
FIRE OR EXPLOSION HAZARD
WHAT TO DO IF YOU SMELL GAS
*SD (95.0% AFUE)
WARNING
92.1% Through 95.0% AFUE
*SL (92.1% AFUE) &
*SM (95.0% AFUE)
Downflow Furnace

Advertisement

Table of Contents
loading
Need help?

Need help?

Do you have a question about the SC Series and is the answer not in the manual?

Questions and answers

Subscribe to Our Youtube Channel

Related Manuals for Nortek SC Series

Summary of Contents for Nortek SC Series

  • Page 1 Single Stage Condensing Gas Furnaces 92.1% Through 95.0% AFUE OBSOLETE INSTALLATION INSTRUCTIONS *SL (92.1% AFUE) & *SC (92.1%AFUE) *SM (95.0% AFUE) Upflow / Horizontal Furnace Downflow Furnace *SD (95.0% AFUE) Upflow / Horizontal Furnace WARNING FIRE OR EXPLOSION HAZARD • Failure to follow safety warnings exactly could result in serious injury, death or property damage.

  • Page 2: Table Of Contents

    (*SC Series) ..........39 Upflow Furnaces .............. 14 Figure 36. Venting Options for 1 Pipe Horizontal Horizontal Furnaces ............14 Installations (*SC Series) ......40 Downflow Furnaces ............15 Figure 37. Venting Options for 2-Pipe Horizontal Installation on a Concrete Slab ........15 Installations (*SC Series) ......

  • Page 3: Important Safety Information

    IMPORTANT SAFETY INFORMATION kerosene, cigarette lighter fluid, dry cleaning fluids, paint OBSOLETE thinners, or other volatile fluids. INSTALLER: Please read all instructions before servicing • The installer should become familiar with the units wiring this equipment. Pay attention to all safety warnings and diagram before making any electrical connections to the any other special notes highlighted in the manual.

  • Page 4: Combustion Air Quality

    1. For direct-vent appliances, mechanical-vent heating The information listed below is for reference purposes only appliances or domestic hot water equipment, where the OBSOLETE and does not necessarily have jurisdiction over local or state bottom of the vent terminal and the air intake is installed codes.

  • Page 5: Heating Load

    • Exposure to the following substances in the combustion CLEARANCES TO COMBUSTIBLE MATERIALS air supply may require outdoor air for combustion: OBSOLETE UPFLOW DOWNFLOW Permanent wave solutions APPLICATIONS APPLICATIONS Chlorinated waxes and cleaners Chlorine based swimming pool chemicals BACK BACK HORIZONTAL Water softening chemicals APPLICATIONS...

  • Page 6: Combustion Air & Venting Requirements

    Construction checklist. result in carbon monoxide poisoning or death. — Email copy of completed Use of Furnace During Construction checklist to warranty@nortek.com The following steps shall be followed with — Leave original completed Use of Furnace During each individual appliance connected to the Construction checklist with furnace.

  • Page 7: Direct Vent Furnaces

    IMPORTANT INFORMATION: CAUTION: • This furnace must be vented in compliance with OBSOLETE the current revision of the National Fuel Gas Code Exhaust fans, clothes dryers, fireplaces and (ANSI-Z223.1/NFPA54). Instructions for determining the other appliances that force air from the house adequacy of an installation can be found in the current revision of the NFGC (ANSI Z223.1 / NFPA54).

  • Page 8: Outdoor Air From A Crawl Space Or Vented Attic

    Outdoor Air Using Vertical Ducts EXAMPLE OBSOLETE If combustion air is taken from outdoors through vertical If the combined input rate of all appliances is less than or ducts, the openings and ducts must have a minimum free equal to 100,000 Btuh, each opening must have a free area of one square inch per 4,000 Btuh of total appliance area of at least 100 in .

  • Page 9: Air Directly Through An Exterior Wall

    Conventional Vent Systems - Unconfined Air Directly Through An Exterior Wall OBSOLETE If combustion air is provided directly through an exterior Spaces wall, the two openings must each have free area of at least An unconfined space is an area including all rooms not one square inch per 4,000 Btuh of total appliance input.

  • Page 10: Vent Pipe Material

    Vent Pipe Material indicates the maximum allowable pipe Table 1 (page 10) OBSOLETE length for a furnace of known input rate, when installed with Vent and combustion air pipe and fittings must be one of piping of selected diameter and number of elbows. To use the following materials in the list and must conform to the the table, the furnace input rate, the centerline length and indicated ANSI/ASTM standards.

  • Page 11: Outdoor Terminations - Horizontal Venting

    • Route piping as direct as possible between the furnace and the outdoors. Horizontal piping from inducer to OBSOLETE the flue pipe must be sloped 1/4” per foot to ensure condensate flows towards the drain tee or PVC trap. Longer vent runs require larger pipe diameters. Refer to the Inducer &...

  • Page 12: Outdoor Terminations - Vertical Venting

    Vent and combustion air piping port on the in-line drain assembly is pointed downward to may be installed in an existing chimney which is not in use ensure proper drainage of condensate. For *SC series, provided that: &...

  • Page 13: Circulating Air Requirements

    For Installations where there is limited clearance for the • When a cooling system is installed which uses the J-Trap (such as an attic where it may be installed between OBSOLETE furnace blower to provide airflow over the indoor coil, the ceiling joists), either side of the J-Trap can be shortened to coil must be installed downstream (on the outlet side) of a minimum of 3 Inches.

  • Page 14: Downflow Furnaces

    FURNACE INSTALLATION Downflow Furnaces OBSOLETE • To attach the return air duct to the furnace, bend the *SC & *SD series gas furnaces offer a wide range of flanges on the furnace upward 90° with wide duct pliers. installation options, including installation in the upflow or for furnace flange locations.

  • Page 15: Downflow Furnaces

    Downflow Furnaces OBSOLETE Two-pipe installation shown WARNING: Flue pipe vented to outside Wood or The furnace must not be installed directly on non-combustible carpeting, tile, or any combustible material other platform than wood flooring. Coil Plenum WARNING: Condensate Combustion Air Drain Lines Failure to install the downflow sub-base kit may result in fire, property damage or personal injury.

  • Page 16: Inducer Assembly Rotation

    Before using , the number of pipes (1-pipe or 2-pipe) Table 4 CAUTION: connected to the furnace must be known. Find the proper OBSOLETE furnace style (upflow, horizontal, or downflow) and then the It is good practice to label all wires prior to side that the pipes will exit from the furnace.

  • Page 17: Finish Flange

    OBSOLETE ALTERNATE PRIMARY Figure 14. Pressure Switch Tubing LOCATION LOCATION for *SD038 Furnaces Only Figure 17. Alternate Pressure Switch Location FRONT Finish FRONT lettering must be Flange located near front of furnace Flange Gasket Hole for Hole for Inlet Flue Air Vent Pipe Vent Pipe Figure 15.

  • Page 18: Pvc Components

    INSTALLATION OF PVC COMPONENTS ø 2 1/4” Rubber Grommet OBSOLETE (TYPICAL ORIENTATION) (see note) 2” PVC Pipe from Inline Drain Assembly (Not Included) 2” PVC Tee PVC TRAP Not Included in *SC & *SL Models 1/2” Tubing (Field Supplied) Drain Line Attached 1/2”...

  • Page 19: Optional Pvc Pipe Installation

    Optional PVC Pipe Installation EXCEPTIONS & CLARIFICATIONS TO THE OBSOLETE GENERAL RULES: When running the 2” PVC pipe out through the top of the • If the vent exits the furnace horizontally, the vent may be *SD upflow furnace, there may be possible clearance issues turned vertically with a tee.

  • Page 20: Gas Supply & Piping

    • Gas piping must never run in or through air ducts, chimneys, gas vents, or elevator shafts. OBSOLETE • Compounds used on threaded joints of gas piping Screws must be resistant to the actions of LP propane gas. Blower • The main gas valve and main power disconnect to the Door Deck furnace must be properly labeled by the installer in...

  • Page 21: Converting From Natural Gas To Lp / Propane

    After changing the regulator pressure or the orifices, it is WARNING: OBSOLETE required that you measure the gas input rate. This may be accomplished in the usual way, by clocking the gas meter The reduction of input rating necessary for high and using the local gas heating value.
  • Page 22 *SC SERIES OBSOLETE Burner Burner Assembly Assembly Manifold Manifold Valve Valve Note “A” Note “A” Shut-Off Pipe Shut-Off Pipe Valve Nipple Valve Nipple Note “B” Note “B” Plug Elbow Drip Leg Drip Leg Elbow Ground Ground Joint Joint Union Union...
  • Page 23 *SL SERIES OBSOLETE Note “A” Note “A” Shut-Off Shut-Off Elbow Valve Elbow Note “B” Note “B” Valve Plug Drip Leg Drip Leg Pipe Pipe Nipple Ground Ground Nipple Joint Joint Union Union Valve Valve Right Side Entry Left Side Entry Burner Manifold Assembly...

  • Page 24: Electrical Wiring

    ELECTRICAL WIRING Line Voltage Wiring OBSOLETE It is recommended that the line voltage (115 VAC) to the WARNING: furnace be supplied from a dedicated branch circuit containing the correct fuse or circuit breaker for the furnace as listed Table 5 (page 24) ELECTRICAL SHOCK, FIRE OR The installer should become familiar with the units wiring EXPLOSION HAZARD...

  • Page 25: Thermostat / Low Voltage Connections

    Field Supplied Field Supplied OBSOLETE Fused Service Disconnect within Field Supplied Field Line Voltage Wiring Panel Sight of Furnace Panel Connector Factory Line Voltage Wiring Black Black (Hot) Black Black White (Neutral) White White White Green or Bare (Ground) Ground Ground Ground Junction Box (may be int.

  • Page 26: Two Stage Heating

    START-UP & ADJUSTMENTS SINGLE STAGE HEATING (WITH TWINNING) OBSOLETE Pre-Start Check List √ Verify the polarity of the connections are correct, the line UNIT THERMOSTAT RELAY voltage power leads are securely connected and the furnace is properly grounded. WHITE √ Verify the thermostat wires (R, W, Y, & G) are securely connected to the correct leads on the terminal strip of the circuit board.

  • Page 27: Verifying & Adjusting Temperature Rise

    from the factory pre-wired for 4 blower speeds. There is a fifth Capscrew alternate speed available on the motor. To utilize the alternate OBSOLETE speed, remove the wire at the motor plug of the desired speed to be changed (H, MH, ML, L). Reconnect this wire to the alternate motor plug speed tap.

  • Page 28: Fault Conditions

    Fault Conditions MAINTENANCE OBSOLETE There is a green and a red LED (labeled “Status”) on the WARNING: motor control board to provide system faults as described below. Refer to to determine motor Table 14 (page 47) control board fault conditions. ELECTRICAL SHOCK, FIRE OR EXPLOSION HAZARD OPERATING SEQUENCE...
  • Page 29 Cleaning of Burners - If the burners must be cleaned, follow 12. Follow the lighting instructions found on the furnace door steps 1-12. See Figure 43 (page 48) OBSOLETE Figure 44 (page to return the furnace to operation. Verify proper operation for component location.

  • Page 30: Figures & Tables

    FIGURES & TABLES OBSOLETE TOP VIEW BOTTOM VIEW *SL & *SM DOWNFLOW FURNACES MODEL #’S DIM. -A- DIM. -B- DIM. -C- Front Brace 054D-T24B1 17 1/2 15 7/8 16 1/8 072D-T35C1 19 3/8 19 5/8 090D-T35C1 NOTE: Dimensions shown in inches. Combustion Flue 7 1/2...
  • Page 31 TOP VIEW BOTTOM VIEW OBSOLETE *SC UPFLOW / HORIZONTAL FURNACES Front Brace MODEL #’S DIM. -A- DIM. -B- DIM. -C- 038D-T23A1 14 1/4 12 5/8 12 7/8 054D-T24B1 17 1/2 15 7/8 16 1/8 Bottom 072D-T24B1 Panel 072D-T35C1 19 3/8 19 5/8 Flue 090D-T35C1...
  • Page 32 Electrical Information OBSOLETE HIGH XFMR R C Y G W Figure 32. Wiring Diagram...
  • Page 33 LADDER DIAGRAM OBSOLETE Single Stage Furnaces DOOR NEUTRAL SWITCH NEUTRAL BLOWER CHOKE MOTOR (SOME MODELS) FLAME SENSOR P1-7 NEUTRAL ELECTRONIC AIR CLEANER P2-3 P2-6 HOT SURFACE IGNITOR NEUTRAL HUMIDIFIER P2-1 P2-4 INDUCER NEUTRAL XFORMER 120 VAC See Note TRANSFORMER 24 VAC TO MOTOR 3A FUSE RELAYS...
  • Page 34 Gas Information OBSOLETE GAS FLOW RATES GAS FLOW RATES (CUBIC FEET PER HOUR) (CUBIC FEET PER HOUR) CUBIC FEET PER CUBIC FEET PER TIME FOR TIME FOR REVOLUTION OF GAS METER REVOLUTION OF GAS METER ONE REVOLUTION ONE REVOLUTION (SECONDS) (SECONDS) 1,800 3,600...
  • Page 35 HIGH ALTITUDE DERATION – PROPANE GAS OBSOLETE INPUT (BTU) ALTITUDE ABOVE 38,000 38,000 SEA LEVEL 54,000 72,000 90,000 108,000 118,000 120,000 (SC MODELS) (SD MODELS) ORIFICE SIZE 0 to 1,999 FT 10.0 10.0 10.0 10.0 10.0 10.0 10.0 10.0 MANIFOLD PRESSURE ORIFICE SIZE 2,000 to 2,999 FT MANIFOLD PRESSURE...
  • Page 36 HIGH ALTITUDE DERATION – NATURAL GAS WITH HIGH HEATING VALUE OBSOLETE INPUT (BTU) ALTITUDE ABOVE 38,000 38,000 SEA LEVEL 54,000 72,000 90,000 108,000 118,000 120,000 (SC MODELS) (SD MODELS) ORIFICE SIZE 0 to 1,999 FT MANIFOLD PRESSURE ORIFICE SIZE 2,000 to 2,999 FT MANIFOLD PRESSURE ORIFICE SIZE 3,000 to 3,999 FT...
  • Page 37 Venting Information OBSOLETE VENT TERMINAL AIR SUPPLY INLET AREA WHERE TERMINAL IS NOT PERMITTED CANADIAN INSTALLATIONS US INSTALLATIONS CLEARANCE LOCATION DIRECT VENT (2-PIPE) & DIRECT VENT CONVENTIONAL VENT CONVENTIONAL VENT (1-PIPE) (2-PIPE) FURNACES (1-PIPE) FURNACES FURNACES Clearance above grade, veranda, porch, deck, 12 inches (30cm) 12 inches (30cm) 12 inches (30cm)

  • Page 38: Sc & *Sl Series

    *SC & *SL Series OBSOLETE HORIZONTAL VENTING w/ 2-Pipes Straps or other suitable supports Wall (Upflow Furnace Shown) at minimum 5 ft. intervals (both pipes) Seal / caulk around pipes First support as close at wall to furnace as possible 90°...
  • Page 39 OPTION 4 OPTION 6 OPTION 5 Rubber Grommet PVC Trap See VIEW C for drain line positions See VIEW A for drain line positions See VIEW B for drain line positions Figure 35. Venting Options for Upflow Installations (*SC Series)
  • Page 40 HORIZONTAL LEFT - 1 PIPE OPTIONS See VIEW F for See VIEW G for Rubber Plug drain line positions Grommet drain line positions OPTION OPTION NOTE 5 COMBUSTION COMBUSTION Plug Rubber Grommet Plug Plug Figure 36. Venting Options for 1 Pipe Horizontal Installations (*SC Series)
  • Page 41 See VIEW J for See VIEW K for Rubber Plug drain line positions Grommet drain line positions Flange OPTION OPTION NOTE 5 COMBUSTION AIR COMBUSTION AIR Plug Rubber Plug Plug Grommet Figure 37. Venting Options for 2-Pipe Horizontal Installations (*SC Series)

  • Page 42: (*Sl Series)

    *SL SERIES DOWNFLOW - 1 PIPE OPTIONS OBSOLETE COMBUSTION Rubber COMBUSTION Grommet COMBUSTION Plug Plug Option Option Option NOTE 5 NOTE 5 Rubber Grommet Trap Rubber Grommet See VIEW L for drain line positions See VIEW M for drain line positions See VIEW N for drain line positions VIEW -L- VIEW -M-...

  • Page 43: Sd & *Sm Series

    *SD & *SM Series OBSOLETE HORIZONTAL VENTING w/ 2-Pipes (Upflow Furnace Shown) Straps or Other Suitable Seal/Caulk Supports at minimum of 5 ft. Intervals Around Pipes at Building 90° 90° Elbow Elbow COMBUSTION AIR 90° Elbow Upward Pitch - 1/4” per foot 12”...
  • Page 44 *SD SERIES UPFLOW - 1 PIPE OPTIONS COMBUSTION OBSOLETE COMBUSTION NOTE 5 PVC Tee PVC Trap NOTE 5 PVC Tee Rubber Grommet OPTION 21 OPTION 22 PVC Trap Rubber Grommet See VIEW O for drain line positions See VIEW P for drain line positions VIEW -O- VIEW -P- Field Supplied...
  • Page 45 *SD SERIES HORIZONTAL RIGHT - 1 PIPE OPTION *SD SERIES HORIZONTAL LEFT - 1 PIPE OPTION OBSOLETE Rubber Rubber Option Option Grommet Grommet COMBUSTION COMBUSTION See VIEW R for See VIEW Q for Plug Plug drain line positions drain line positions Inline Drain (Factory Supplied) See NOTE 3...
  • Page 46 *SM SERIES DOWNFLOW - 1 PIPE OPTIONS OBSOLETE COMBUSTION COMBUSTION Rubber COMBUSTION Grommet Option Option Option NOTE 5 PVC Tee NOTE 5 PVC Trap PVC Tee Rubber Grommet PVC Trap Rubber Grommet See VIEW S for drain line positions See VIEW T for drain line positions See VIEW U for drain line positions VIEW -U- Inline Drain...

  • Page 47: Troubleshooting

    TROUBLESHOOTING DIAGNOSTIC DESCRIPTION RED LED GREEN LED OBSOLETE If the furnace fails to operate check the following: • Is the thermostat operating properly? Control Fault (No Power) • Are the blower compartment door(s) in place? Normal Operation • Is the furnace disconnect closed? •...
  • Page 48 UPFLOW / HORIZONTAL FURNACE (*SC SERIES) OBSOLETE Finish Flange Igniter Flame Roll-Out Burner Sensor Switch Assembly Gas Manifold Control Board Gas Valve Main Air Limit Switch Vent Limit Switch Pressure Switch - Condensate Inducer Assembly (‘B’, ‘C’, & ‘D’ cabinets only)
  • Page 49 DOWNFLOW FURNACE (*SL SERIES) OBSOLETE Finish Blower Flange Assembly Control Board Blower Door Switch Transformer (behind blower panel) Vent Limit Switch Inducer Assembly Pressure Switch Main Air Limit Switch Gas Valve Gas Manifold Igniter Burner Roll-Out Flame Assembly Switch Sensor DOWNFLOW FURNACE (*SM SERIES) Finish Flange Blower Assembly...
  • Page 50 OBSOLETE...
  • Page 51 OBSOLETE...

  • Page 52: Installation Checklist

    Filter(s) clean? Flue connections tight? Is there proper draft? G7SC MGC2S G7SD G7SL MH63349 Specifications & illustrations subject to change without notice or incurring obligations (12/19). 1025916B O’Fallon, MO, © Nortek Global HVAC LLC 2019. All Rights Reserved. (Replaces 1025916A)

This manual is also suitable for:

Sd seriesSl seriesSm seriesVg7sdFg7scFg7sl ... Show all

Table of Contents