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INSTALLATION INSTRUCTIONS
These instructions must be read and understood completely before attempting installation.
DANGER, WARNING, CAUTION, and NOTE
The signal words DANGER, WARNING, CAUTION, and NOTE
are used to identify levels of hazard seriousness. The signal word
DANGER is only used on product labels to signify an immediate
hazard. The signal words WARNING, CAUTION, and NOTE will
be used on product labels and throughout this manual and other
manual that may apply to the product.
DANGER − Immediate hazards which will result in severe person-
al injury or death.
WARNING − Hazards or unsafe practices which could result in
severe personal injury or death.
CAUTION − Hazards or unsafe practices which may result in
minor personal injury or product or property damage.
NOTE − Used to highlight suggestions which will result in en-
hanced installation, reliability, or operation.
TABLE OF CONTENTS
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Portions of the text and tables are reprinted from NFPA 54 /ANSI Z223.1−2012, with permission of National Fire Protection Association, Quincy, MA 02269 and American Gas Association, Washing-
ton, DC 20001. This reprinted material is not the complete and official position of the NFPA or ANSI, on the referenced subject, which is represented only by the standard in its entirety.
Printed in U.S.A.
80% Single Stage, PSC Motor
Category I, Gas Furnace
N8MSN, N8MSL
Safety Labeling and Signal Words
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Signal Words in Manuals
The signal word WARNING is used throughout this manual in the
following manner:
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The signal word CAUTION is used throughout this manual in the
following manner:
!
Signal Words on Product Labeling
Signal words are used in combination with colors and/or pictures
or product labels.
Safety−alert symbol
When you see this symbol on the unit and in instructions or manu-
als, be alert to the potential for personal injury.
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WARNING
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!
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PERSONAL INJURY, AND/OR PROPERTY
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DAMAGE HAZARD
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Failure to carefully read and follow this warning could
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result in equipment malfunction, property damage,
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personal injury and/or death.
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Installation or repairs made by unqualified persons
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could result in equipment malfunction, property
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damage, personal injury and/or death.
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The information contained in this manual is intended for
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use by a qualified service technician familiar with safety
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procedures and equipped with proper tools and test
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instruments.
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Installation must conform with local building codes and
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with the Natural Fuel Gas Code (NFCG) NFPA
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54/ANSI Z223.1, and National standards of Canada
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CAN/CSA−B149.1 and .2 Natural Gas and Propane
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Installation Codes.
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INSTALLER: Affix these instructions on or adjacent to the furnace.
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CONSUMER: Retain these instructions for future reference.
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WARNING
CAUTION
Use of the AHRI Certified TM Mark indicates
a manufacturer's participation in the program.
For verification of certification for individual
products, go to www.ahridirectory.org .
441 01 1402 06 9/15/2014
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Table of Contents
Related Manuals for Arcoaire N8MSN Series
Summary of Contents for Arcoaire N8MSN Series
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Page 1: Table Of Contents
INSTALLATION INSTRUCTIONS 80% Single Stage, PSC Motor Category I, Gas Furnace N8MSN, N8MSL These instructions must be read and understood completely before attempting installation. Safety Labeling and Signal Words DANGER, WARNING, CAUTION, and NOTE Signal Words in Manuals The signal words DANGER, WARNING, CAUTION, and NOTE The signal word WARNING is used throughout this manual in the following manner: are used to identify levels of hazard seriousness. - Page 2 Figure 1 - Dimensional Drawing NOTES: 1. Two additional 7/8-in. (22 mm) diameter holes are located in the top plate. 2. Minimum return-air openings at furnace, based on metal duct. If flex duct is used, see flex duct manufacturer's recommendations for equivalent diameters. a.
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Page 3: Dimensions
Table 1—Dimensions − In. (mm) TOP AND VENT OUTLET BOTTOM BOTTOM CONNECTION FURNACE SIZE CABINET WIDTH WIDTH FLUE COLLAR WIDTH SHIP WT SIZE* IN (mm) IN (mm) N8MSN & N8MSL IN (mm) IN (mm) IN (mm) LB (KG) 0451408 14−3/16 (360) 12−9/16 (319) 9−5/16 (237) 12−11/16 (322) -
Page 4: Introduction
which has an external static pressure within the allow- (914 mm) horizontally from the furnace. See NFPA 90B able range, as specified in the “Start−Up, Adjustments, or local code for further requirements. and Safety Check” section. See furnace rating plate. 13. -
Page 5: Codes And Standards
Step 6 —Gas Piping and Gas Pipe Pressure Figure 3 - Return Air Temperature Testing NFGC; NFPA 54 / ANSI Z223.1−2012 chapters 5, 6, 80_F/27_C 7 and 8 and National Plumbing Codes Step 7 —Electrical Connections National Electrical Code (NEC) NFPA 70−2011 Step 8 —Venting NFGC NFPA 54 / ANSI Z223.1−2012;... -
Page 6: Location
LOCATION GENERAL This multipoise furnace is shipped in packaged configuration. WARNING Some assembly and modifications are required when used in any of the four applications shown in Figure 4. CARBON MONOXIDE POISONING AND UNIT This furnace must: DAMAGE HAZARD be installed so the electrical components are protec- Failure to follow this warning could result in personal ted from water. -
Page 7: Air For Combustion And Ventilation
Figure 5 - Installation in a Garage WARNING FIRE, INJURY OR DEATH HAZARD Failure to follow this warning could result in personal injury, death and/or property damage. When the furnace is installed in a residential garage, the burners and ignition sources must be located at least 18 in. - Page 8 2. Figure 7 illustrates how to provide TWO OUTDOOR CAUTION OPENINGS, one inlet and one outlet combustion and ventilation air opening, to the outdoors. a. One opening MUST commence within 12 in. (300 FURNACE CORROSION HAZARD mm) of the ceiling and the second opening MUST Failure to follow this caution may result in furnace commence within 12 in.
- Page 9 Table 3—Minimum Space Volumes for 100% Combustion, Ventilation, and Dilution from Indoors OTHER THAN FAN‐ASSISTED TOTAL FAN‐ASSISTED TOTAL (1,000'S BTUH GAS INPUT RATE) (1,000'S BTUH GAS INPUT RATE) Space Volume Ft 1,050 1,400 1,750 1,100 1,650 2,200 2,750 3,300 3,850 0.60 (29.7) (39.6)
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Page 10: Installation
c. Minimum size of Outdoor openings shall be the size required in Outdoor Combustion Air Method other = combined input of all other than fan−assisted above multiplied by reduction Factor in b. above. appliances in Btuh/hr The minimum dimension of air openings shall be fan = combined input of all fan−assisted appliances in not less than 3 in. -
Page 11: Downflow Installation
Figure 10 - Leveling Legs Figure 11 - Floor and Plenum Opening Dimensions 5/ 16 (8mm) (8mm) 5/ 16 (44mm) (44mm) (8mm) A96283 (8mm) NOTE: It is recommended that the perforated supply−air duct 5/ 16 ... -
Page 12: Filter Arrangement
Figure 13 - Furnace, Plenum, and Coil or Coil Casing each bottom corner. To prevent screws from pulling out, use 2 #8 x 3/4−in. (19 mm) screws into the side and 2 #8 x 3/4−in. Installed on a Combustible Floor (19 mm) screws in the bottom of the furnace casing for each strap. -
Page 13: Air Ducts
Table 4—Opening Dimensions − In. (mm) FURNACE PLENUM OPENING FLOOR OPENING CASING APPLICATION WIDTH Upflow Applications on Combustible or Noncombustible Flooring 12−11/16 21−5/8 13−5/16 22−1/4 (subbase not required) (322) (549) (338) (565) Downflow Applications on Noncombustible Flooring 12−9/16 13−3/16 19−5/8 (subbase not required) (319) (483) -
Page 14: Air Delivery − Cfm
Table 5—Air Delivery − CFM (with Filter)* EXTERNAL STATIC PRESSURE (in. w.c.) FURNACE RETURN−AIR SPEED SIZE INLET Bottom High 1035 0451408A Med−Low Side(s) Bottom High 1440 1375 1305 1240 1160 1070 Med−Low 1360 1300 1240 1175 1115 1040 0451412A Side(s) 1250 1210 1160... - Page 15 Figure 14 - Duct Flanges UPFLOW DOWNFLOW HORIZONTAL 90 90 120 120 120 A02020 Figure 15 - Horizontal Unit Suspension " (6mm) THREADED ROD 4 REQ. OUTER DOOR A S SEMBLY SECURE ANGLE IRON TO BOTTOM OF FURNACE WITH 3 #8 x "...
- Page 16 Figure 16 - Horizontal Suspension with Straps METHOD 2 USE (4) #8 x 3/4 (19 mm) SHEET METAL SCREWS FOR EACH STRAP. THE STRAPS SHOULD BE VERTICAL AGAINST THE FURNACE SIDES AND NOT PULL AWAY FROM THE FURNACE SIDES. METHOD 1 FOLD ALL STRAPS UNDER FURNACE AND SECURE WTH (4) #8 x 3/4 (19 mm) SHEET METAL SCREWS...
- Page 17 Figure 18 - Upflow Return Air Configurations and Restrictions 5 TONS AND GREATER * * 2000 CFM AND GREATER AT .6 ESP HI COOLING SPEED Figure 19 - Downflow Return Air Configurations and Restrictions 5 TONS AND GREATER * * 2000 CFM AND GREATER AT .6 ESP HI COOLING SPEED Figure 20 - Horizontal Return Air Configurations and Restrictions 5 TONS AND GREATER *...
- Page 18 Upflow and Horizontal Furnaces WARNING Connect supply−air duct to flanges on furnace supply−air outlet. Bend flange upward to 90_ with wide duct pliers. (See Figure 14) The supply−air duct must be connected to ONLY FIRE OR EXPLOSION HAZARD the furnace supply−outlet−air duct flanges or air conditioning Failure to follow this warning could result in personal coil casing (when used).
- Page 19 Piping should be pressure and leak tested in accordance with CAUTION NFGC, local, and national plumbing and gas codes before the furnace has been connected. After all connections have been made, purge lines and check for leakage at furnace FURNACE OVERHEAT HAZARD prior to operating furnace.
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Page 20: Electrical Connections
ELECTRICAL CONNECTIONS by this equipment. Refer to rating plate or Table 7 for equipment electrical specifications. WARNING Make all electrical connections in accordance with National Electrical Code (NEC) NFPA 70−2011 and any local codes or ELECTRICAL SHOCK, FIRE OR EXPLOSION ordinances that might apply. -
Page 21: Electrical Data
6. Reinstall cover to J−Box. Do not pinch wires between 3. Fasten the electrical box to casing by driving two field cover and bracket. Electrical Box on Furnace Casing supplied screws from inside electrical box into casing Side See Figure 24. steel. -
Page 22: 24−V Wiring
BX CABLE INSTALLATION IN FURNACE J−BOX 4. Secure field ground wire to green ground screw on J−Box bracket. 1. Remove cover from J−Box. 5. Connect line voltage leads as shown in Figure 26. 2. Route BX cable into 7/8−inch (22 mm) diameter hole in 6. -
Page 23: Accessories
The 24−v circuit contains an automotive−type, 3−amp. fuse WARNING located on the control. Any direct shorts during installation, service, or maintenance could cause this fuse to blow. If fuse CARBON MONOXIDE POISONING HAZARD replacement is required, use ONLY a 3−amp. fuse of identical Failure to follow the steps outlined below for each appliance size. -
Page 24: Masonry Chimney Requirements
4. Do not vent this appliance with any solid fuel burning for the local 99% Winter Design Temperature. Chim- appliance. neys having internal areas greater than 38 in (24516 require furnace input ratings greater than the in- 5. Category I furnaces must be vented vertically or nearly vertically unless equipped with a listed power venter. - Page 25 Figure 27 - Chimney Inspection Chart A10133 441 01 1402 06 Specifications are subject to change without notice.
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Page 26: Appliance Application Requirements
APPLIANCE APPLICATION REQUIREMENTS Table 9—Minimum Allowable Input Rating of Space−Heat- ing Appliance in Thousands of Btuh per Hour Appliance operation has a significant impact on the performance of the venting system. If the appliances are INTERNAL AREA OF CHIMNEY sized, installed, adjusted, and operated properly, the venting SQ. -
Page 27: Sidewall Venting
The vent connector can exit the cabinet of the furnace CAUTION through one of five locations. 1. Attach the single wall vent connector to the furnace BURN HAZARD vent elbow, and fasten the vent connector to the vent Failure to follow this caution may cause personal elbow with at least two field−supplied, corrosion−resist- injury. - Page 28 Figure 28 - Upflow Application−Vent Elbow Up Figure 30 - Downflow Application−Vent Elbow Up then Left SEE NOTES: 1,2,4,7,8,9 on the page following these figures SEE NOTES:1,2,3,4,5,7,8,9 on the page following A03208 these figures Figure 29 - Upflow Application−Vent Elbow Right A03210 Figure 31 - Downflow Application−Vent Elbow Up SEE NOTES: 1,2,3,4,7,8,9...
- Page 29 Figure 32 - Downflow Application−Vent Elbow Left then Figure 35 - Horizontal Left Application−Vent Elbow Right then Up SEE NOTES: 1,2,4,5,7,8,9 on the page following these figures A03214 Figure 36 - Horizontal Left Application−Vent Elbow Up SEE NOTES: 1,2,4,5,6,7,8,9,10 on the page following these figures A03207 Figure 33 - Downflow Application−Vent Elbow Up then Right...
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Page 30: Start−Up, Adjustment, And Safety Check
START−UP, ADJUSTMENT, AND SAFETY Figure 39 - Horizontal Right Application−Vent Elbow Left then Up CHECK Step 1 —General WARNING FIRE HAZARD Failure to follow this warning could result in personal injury, death and/or property damage. This furnace is equipped with manual reset limit switches in the gas control area. -
Page 31: Adjustments
WARNING WARNING FIRE HAZARD ELECTRICAL SHOCK HAZARD Failure to follow this warning could result in injury, Failure to follow this warning could result in personal death and/or property damage. injury, or death. DO NOT bottom out gas valve regulator adjusting Blower access door switch opens 115−v power to screw. -
Page 32: Speed Selection
NOTE: Blower access door must be installed when taking EXAMPLE 2: (0−2000 ft. (0−610 M) altitude) temperature rise reading. Leaving blower access door off will For 22,000 Btuh per burner application use Table 15. result in incorrect temperature measurements. Heating value = 1000 Btuh/cu ft. a. -
Page 33: Check Safety Controls
j. Reinstall blower access door if removed. Figure 42 - Orifice Hole k. Turn gas valve ON/OFF switch to ON. CAUTION FURNACE OVERHEATING HAZARD Failure to follow this caution may result in reduced furnace life. Recheck temperature rise. It must be within limits specified on the rating plate. -
Page 34: Checklist
a. Verify vent pipe is cool to the touch. d. Set thermostat to “call for heat” and wait 1 minute. When pressure switch is functioning properly, hot b. Disconnect power to furnace and remove vent con- surface igniter should NOT glow and control dia- nector from furnace vent elbow. -
Page 35: Orifice Size And Manifold Pressure
Table 14—Filter Size Information − in.(mm) FILTER SIZE FURNACE CASING WIDTH FILTER TYPE SIDE RETURN BOTTOM RETURN 14−1/2 (368) 16 x 25 x 3/4 (406 x 635 x 19) 14 x 25 x 3/4 (356 x 635 x 19) Washable* 17−1/2 (445) 16 x 25 x3/4 (406 x 635 x 19) 16 x 25 x 3/4 (406 x 635 x 19) - Page 36 Table 15–Orifice Size* and Manifold Pressure in. w.c. for Gas Input Rate (Continued) (Tabulated data based on 22,000 btuh per burner, derated 4 percent for each 1000 ft. (305 M) above sea level) SPECIFIC GRAVITY OF NATURAL GAS AVG. GAS ALTITUDE RANGE 0.58 0.60...
- Page 37 Table 16—Orifice Size* and Manifold Pressure in. w.c. for Gas Input Rate (Tabulated data based on 21,000 btuh per burner, derated 4 percent for each 1000 ft. (305 M) above sea level) SPECIFIC GRAVITY OF NATURAL GAS ALTITUDE AVG. GAS 0.58 0.60 0.62...
- Page 38 Table 16—Orifice Size* and Manifold Pressure in. w.c. for Gas Input Rate (Continued) (Tabulated data based on 21,000 btuh per burner, derated 4 percent for each 1000 ft. (305 M) above sea level) AVG. GAS SPECIFIC GRAVITY OF NATURAL GAS ALTITUDE HEAT VALUE 0.58...
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Page 39: Service And Maintenance Procedures
SERVICE AND MAINTENANCE ELECTRICAL CONTROLS AND WIRING PROCEDURES WARNING Untrained personnel can perform basic maintenance functions such as cleaning and replacing air filters. All other operations ELECTRICAL SHOCK HAZARD must be performed by trained service personnel. A qualified ser- Failure to follow this warning could result in personal vice person should inspect the furnace once a year. - Page 40 maintenance to the accessories as recommended in the WARNING accessory instructions. CLEANING AND/OR REPLACING AIR FILTER FIRE OR EXPLOSION HAZARD The air filter arrangement will vary depending on the Failure to follow this warning could result in personal application. The filter is exterior to the furnace casing. injury, death and/or property damage.
- Page 41 8. Vacuum any loose dust from blower housing, wheel 16. If furnace is operating properly, RELEASE BLOWER and motor. ACCESS DOOR SWITCH. Remove any jumpers or re- connect any disconnected thermostat leads. Replace 9. If a greasy residue is present on blower wheel, remove blower access door.
- Page 42 spring cable, a variable speed reversible electric drill, (4) Insert brush end of cable in burner inlet opening of cell, and vacuum cleaner, clean cells as follows: and proceed to clean 2 lower passes of cell in same manner as upper pass. a.
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Page 43: Sequence Of Operation
Step 3 —Sequence of Operation Simultaneously, the electronic air cleaner terminal EAC 1 AMP is energized and remains energized as NOTE: Furnace control must be grounded for proper long as the blower motor BLWM is energized. operation or control will lock out. Control is grounded through f. -
Page 44: Wiring Diagram For Models
Figure 48 - Wiring Diagram for Models 441 01 1402 06 Specifications are subject to change without notice. -
Page 45: Troubleshooting Guide
Figure 49 - Troubleshooting Guide 441 01 1402 06 Specifications are subject to change without notice. - Page 46 441 01 1402 06 Specifications are subject to change without notice.
- Page 47 PARTS REPLACEMENT INFORMATION GUIDE CASING GROUP BLOWER GROUP Gas valve Manual reset limit switches Outer door Blower housing Blower door Blower cutoff HEAT EXCHANGER GROUP Top filler plate Blower motor Heat exchanger cell Bottom filler plate Blower wheel Cell panel Bottom enclosure Capacitor (where used) Lox NOx baffle (California models...