Table of Contents
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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% Two−Stage, Variable Speed
Category I, Gas Furnace
F8MVL & G8MVL 'B2' Series
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:
!
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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Use of the AHRI Certified TM Mark indicates a
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manufacturer's participation in the program. For
verification of certification for individual products,
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go to www.ahridirectory.org .
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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.
Installation must conform with local building codes and
with the Natural Fuel Gas Code (NFCG) NFPA 54/ANSI
Z223.1,
and
CAN/CSA−B149.1 and .2 Natural Gas and Propane
Installation Codes.
INSTALLER: Affix these instructions on or adjacent to the furnace.
CONSUMER: Retain these instructions for future reference.
WARNING
CAUTION
National
standards
of
441 01 2122 01
5/2/2016
Canada
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Table of Contents
Related Manuals for International comfort products F8MVL
Summary of Contents for International comfort products F8MVL
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Page 1: Table Of Contents
INSTALLATION INSTRUCTIONS 80% Two−Stage, Variable Speed Category I, Gas Furnace F8MVL & G8MVL 'B2' Series 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... - 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: Safety Considerations
SAFETY CONSIDERATIONS symbol. DANGER identifies the most serious hazards which will result in severe personal injury or death. WARNING WARNING signifies a hazard which could result in personal injury or death. CAUTION is used to identify hazards which may result in minor personal injury or product and property damage. -
Page 4: Introduction
This furnace is designed for minimum continuous return−air temperature of 60_F (15_C) db or intermittent operation down F8MVL & G8MVL 4−way multipoise Category I fan−assisted to 55_F (13_C)db such as when used with a night setback furnace is CSA (formerly A.G.A. and C.G.A.) design−certified. -
Page 5: General Installation
General Installation 1. Disconnect all power to the furnace. Multiple disconnects may be required. DO NOT TOUCH THE CONTROL OR Current edition of the NFGC and the NFPA 90B. For copies, ANY WIRE CONNECTED TO THE CONTROL PRIOR TO contact the National Fire Protection Association Inc., DISCHARGING YOUR BODY’S... - Page 6 This furnace must: WARNING be installed so the electrical components are protec- ted from water. FIRE, INJURY OR DEATH HAZARD not be installed directly on any combustible material Failure to follow this warning could result in personal other than wood flooring for upflow applications. injury, death and/or property damage.
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Page 7: Minimum Free Area Required
Figure 6 − Prohibit Installation on Back CAUTION PERSONAL INJURY AND/OR PROPERTY DAMAGE HAZARD Improper use or installation of this furnace may result in premature furnace component failure. This gas furnace may be used for heating buildings under construction provided that: −The furnace is permanently installed with all electrical wiring, piping, venting and ducting installed according to these installation instructions. -
Page 8: Air For Combustion And Ventilation
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 0.60 1,050 (29.7) 1,400 (39.6) 1,750 (49.5) 1,100 (31.1) 1,650 (46.7) 2,200 (62.2) - Page 9 c. TWO HORIZONTAL DUCTS require 1 sq. in. (645 WARNING sq. mm) of free area per 2,000 Btuh (1,100 mm /kW) of combined input for all gas appliances in the space per Figure 7 and Table 2. CARBON MONOXIDE POISONING HAZARD d.
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Page 10: Installation
c. Combining space on different floor levels. The Figure 9 − Removing Bottom Closure Panel volumes of spaces on different floor levels shall be considered as communicating spaces if connected by one or more permanent openings in doors or floors having free area of at least 2 in. /1,000 Btuh (4,400 mm /kW) of total input rating of all gas appli-... - Page 11 5. Reinstall bottom closure panel if removed. sides and not pull away from the furnace sides, so that the strap attachment screws are not in tension (are loaded in DOWNFLOW INSTALLATION shear) for reliable support. NOTE: For downflow applications, this furnace is approved for Platform Furnace Support use on combustible flooring when any one of the following two Construct working platform at location where all required...
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Page 12: Opening Dimensions
Figure 12 − Furnace, Plenum, and Subbase Installed on a Figure 13 − Furnace, Plenum, and Coil or Coil Casing In- Combustible Floor stalled on a Combustible Floor FURNACE FURNACE (OR COIL CASING APPROVED WHEN USED) COIL ASSEMBLY COIL BOX COMBUSTIBLE COMBUSTIBLE FLOORING... -
Page 13: Air Ducts
Filter Arrangement Ductwork passing through unconditioned space should be insulated to enhance system performance. When air WARNING conditioning is used, a vapor barrier is recommended. Maintain a 1−in. (25 mm) clearance from combustible materials to supply air ductwork for a distance of 36−in. (914 CARBON MONOXIDE POISONING HAZARD mm) horizontally from the furnace. - Page 14 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 " (19mm) SCREWS TYPICAL FOR 2 SUPPORTS 8" (203mm) MIN FOR DOOR REMOVAL 1”...
- Page 15 Figure 17 − Typical Attic Installation LINE CONT A CT ONL Y PERMISSIBLE BETWEEN LINES FORMED BY INTERSECTIONS OF THE T OP AND TW O SIDES OF THE FURNA CE JA CKET AND BUILDING JOISTS , STUDS , OR FRAMING. ″...
- Page 16 Figure 19 − Downflow Return Air Configurations and Restrictions 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 HORIZONTAL RETURN AIR CONFIGURATIONS AND RESTRICTIONS 5 TONS AND GREATER *...
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Page 17: Gas Piping
Return Air Connections Installations must be made in accordance with all authorities having jurisdiction. If possible, the gas supply line should be a WARNING separate line running directly from meter to furnace. NOTE: In the state of Massachusetts: 1. Gas supply connections MUST be performed by a li- FIRE HAZARD censed plumber or gas fitter. -
Page 18: Electrical Connections
NOTE: The furnace gas control valve inlet pressure tap ELECTRICAL CONNECTIONS connection is suitable to use as test gauge connection WARNING providing test pressure DOES NOT exceed maximum 0.5 psig (14−In. W.C.) stated on gas control valve. (See Figure 49) ELECTRICAL SHOCK, FIRE OR EXPLOSION HAZARD Some installations require gas entry on right side of furnace Failure to follow safety warnings could result in dangerous... - Page 19 Table 6 – Electrical Data OPERATING VOLTS− UNIT MAX. FUSE OR VOLTAGE RANGE HERTZ− MAX. UNIT AMPACITY MAX. WIRE LENGTH MAX. WIRE CKT BKR AMPS { PHASE FURNACE SIZE Max. Min. AMPS − FT (M)} SIZE AWG 0451412B 115-60-1 10.8 34.0 (10.4) 15.0...
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Page 20: 24−V Wiring
Figure 24 − Field−Supplied Electrical Box on Furnace 3. Secure BX cable to J−Box bracket with connectors ap- Casing proved for the type of cable used. 4. Secure field ground wire to green ground screw on J−Box bracket. 5. Connect line voltage leads as shown in Figure 25. 6. - Page 21 Figure 25 − Example of Field Wiring Diagram FIELD 24-VOLT WIRING FIELD 115-, 208/230-, 460-VOLT WIRING FACTORY 24-VOLT WIRING FACTORY 115-VOLT WIRING NOTE 2 1-STAGE THERMOSTAT FIVE FIELD-SUPPLIED TERMINALS WIRE FUSED DISCONNECT THREE-WIRE 208/230- OR HEATING- 460-VOLT ONLY THREE PHASE 208/230- W/W1 VOLT...
- Page 22 13 in the United States, the local building codes, and furnace WARNING and vent manufacturers’ instructions. The following information and warning must be considered in CARBON MONOXIDE POISONING HAZARD addition to the requirements defined in the NFGC. Failure to follow the steps outlined below for each WARNING appliance connected to the venting system being placed into operation could result in carbon monoxide...
- Page 23 Figure 28 − Variable Speed Furnace with Two−Stage Air Figure 30 − Variable Speed Furnace with Two−Stage Heat Conditioner Pump (Dual Fuel) L09F026 Figure 29 − Variable Speed Furnace with Single Stage Heat Pump (Dual Fuel) L09F028 Figure 31 − Variable Speed Furnace and Humidifier Only L09F029 L09F027 441 01 2122 01...
- Page 24 Figure 32 − AC with Variable Speed Furnace, Humidifier, Figure 33 − HP with Variable Speed Furnace, Humidifier, and Dehumidification and Dehumidification L09F029 L09F030 NOTES FOR FIGURES Figure 27 − Figure 33 1. Refer to outdoor equipment Installation Instructions for additional information and setup procedure. 2.
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Page 25: Chimney Inspection Chart
Figure 34 − Chimney Inspection Chart A10133 441 01 2122 01 Specifications are subject to change without notice. - Page 26 Masonry Chimney Requirement A chimney without a clay tile liner, which is otherwise in good condition, shall be rebuilt to conform to ANSI/NFPA 211 or be NOTE: These furnaces are CSA design−certified for use in lined with a UL listed metal liner or UL listed Type−B vent. exterior tile−lined masonry chimneys with a factory accessory Relining with a listed metal liner or Type−B vent is considered Chimney Adapter Kit.
- Page 27 Additional Venting Requirements CAUTION A 4−in. (102 mm) round vent elbow is supplied with the furnace. A 5−in. (127 mm) or 6− in. (152 mm) vent connector BURN HAZARD may be required for some model furnaces. A field−supplied Failure to follow this caution may result in personal 4−in.
- Page 28 Figure 35 − Upflow Application − Vent Elbow Up Figure 37 − 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 these figures A03208 Figure 36 − Upflow Application − Vent Elbow Right A03210 Figure 38 −...
- Page 29 Figure 39 − Downflow Application − Vent Elbow Left then Figure 41 − Horizontal Left Application − Vent Elbow Left SEE NOTES: 1,2,4,7,8,9 on the page following these figures A03213 Figure 42 − Horizontal Left Application − Vent Elbow Right then Up SEE NOTES: 1,2,4,5,6,7,8,9,10 on the page following these figures A03207...
- Page 30 Figure 45 − Horizontal Left Application − Vent Elbow Figure 47 − Horizontal Right Application−Vent Elbow Left Right SEE NOTES: 1,2,4,5,7,8,9 A02068 VENTING NOTES FOR Figure 35 − Figure 47 SEE NOTES: 1,2,4,5,7,8,9 on the page following these figures 1. For common vent, vent connector sizing and vent material: United States−−use the NFGC.
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Page 31: Start−Up, Adjustment, And Safety Check
START−UP, ADJUSTMENT, AND SAFETY CAUTION CHECK General FURNACE DAMAGE HAZARD Failure to follow this caution may result in reduced WARNING furnace life. FIRE HAZARD DO NOT redrill orifices. Improper drilling (burrs, out−of−round holes, etc.) can cause excessive burner Failure to follow this warning could result in personal noise and misdirection of burner flames. - Page 32 Start−Up Procedures NOTE: The furnace control allows all components, except the gas valve, to be run for short period of time. This feature helps WARNING diagnose a system problem in case of a component failure. Component test feature will not operate if any thermostat FIRE OR EXPLOSION HAZARD signal is present at the control.
- Page 33 Table 9 – Furnace Setup Switch Description SETUP NORMAL SWITCH NAME SWITCH POSITION DESCRIPTION OF USE Status Code Turn ON to retrieve up to 7 stored status codes for troubleshooting assistance SW1-1 Recovery when R thermostat lead is disconnected. Low Heat Only When SW1-2 is OFF allows two-stage operation with a single stage thermo- (Adaptive Heat stat.
- Page 34 Table 10 – Air Delivery − CFM (with filter)* COOLING AND HEATING AIR DELIVERY − CFM (Bottom Return with Filter) (SW1−5 and SW4−3 set to OFF. See notes 1 and 2.) Selectable AC Switch Settiings External Static Pressure (ESP) Unit Size SW2−8 SW2−7...
- Page 35 Table 10 − Air Delivery − CFM (with filter)* (continued) Selectable AC Switch Settings External Static Pressure (ESP) Unit Size SW2−8 SW2−7 SW2−6 1625 1580 1535 1490 1445 1390 1325 1215 1070 See note 4 See note 4 1010 See note 4 1210 1155 1105...
- Page 36 Table 10 − Air Delivery − CFM (with filter)* (continued) Selectable AC Switch Settings External Static Pressure (ESP) Unit Size SW2−8 SW2−7 SW2−6 2040 1985 1930 1880 1830 1775 1715 1660 1595 1510 See note 4 1040 See note 4 1245 1170 1080...
- Page 37 Figure 51 − Service Label 340686−101 REV. A 441 01 2122 01 Specifications are subject to change without notice.
- Page 38 Furnace gas input rate on rating plate is for installations at EXAMPLE 1: 0–2000 ft. (0−610 M) altitude altitudes up to 2000 Ft. (610 M). Furnace input rate must be For 22,000 Btuh per burner application use Table 13. within +/−2 percent of furnace rating plate input. For altitudes Heating value = 1000 Btuh/cu ft.
- Page 39 Verify natural gas input rate by clocking meter. NOTE: Temperature rise can be determined for low−heat operation by placing setup switch SW1−2 on furnace control in a. Turn off all other gas appliances and pilots served ON position. For high−heat operation, place setup switch by the meter.
- Page 40 8. Set thermostat heat anticipator. Low Speed or High Speed cooling. See Table 10 Air Deliv- ery − CFM (With Filter ). Depending on the model size, the a. Mechanical thermostat. Set thermostat heat anticip- cooling airflow can be adjusted from 1.5 tons nominal cool- ator to match the amp.
- Page 41 Table 13 – Orifice Size and Manifold Pressure (In. W.C.) for Gas Input Rate (Tabulated Data Based on 22,000 Btuh High−Heat/14,500 Btuh for Low−Heat per Burner, Derated 4 Percent for Each 1000 Ft. (305 M) Above Sea Level) SPECIFIC GRAVITY OF NATURAL GAS AVG.
- Page 42 Table 13 − Orifice Size and Manifold Pressure (In. W.C.) for Gas Input Rate (Con’t.) (Tabulated Data Based on 22,000 Btuh High−Heat/14,500 Btuh for Low−Heat per Burner, Derated 4 Percent for Each 1000 Ft. Above Sea Level) SPECIFIC GRAVITY OF NATURAL GAS AVG.
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Page 43: Service And Maintenance
h. Re−install vent connector. CAUTION NOTE: Should switch remain open longer than 3 minutes, furnace control board will lockout the furnace for 3 hours. To ENVIRONMENTAL HAZARD reset furnace control board, turn thermostat below room temperature or from HEAT to OFF and turn 115−v power OFF, Failure to follow this... - Page 44 wiring during installation, service, or maintenance will cause 6. Component Test sequence will function as follows: this fuse to blow. If fuse replacement is required, use ONLY a a. Inducer motor starts on high−speed and continues to 3−amp. fuse. The control LED turn off when fuse needs to be run until Step (d.) of component test sequence.
- Page 45 Table 15 – Orifice Size and Manifold Pressure (In. W.C.) for Gas Input Rate (Tabulated Data Based on 21,000 Btuh High−Heat/14,500 Btuh for Low−Heat Per Burner, Derated 4 Percent for Each 1000 Ft. (305 M) Above Sea level) SPECIFIC GRAVITY OF NATURAL GAS AVG.
- Page 46 Table 15 − Orifice Size and Manifold Pressure (In. W.C.) for Gas Input Rate (Con’t.) (Tabulated Data Based on 21,000 Btuh High−Heat/14,500 Btuh for Low−Heat Per Burner, Derated 4 Percent for Each 1000 Ft. (305 M) Above Sea level) SPECIFIC GRAVITY OF NATURAL GAS AVG.
- Page 47 Table 16 – Filter Size Information − In. (mm) FILTER SIZE SIDE BOTTOM FURNACE CASING WIDTH RETURN RETURN FILTER TYPE 16 X 25 X 3/4 14 X 25 X 3/4 14−1/2 (368) Washable* (406 X 635 X 19) (356 X 635 X 19) 16 X 25 X 3/4 16 X 25 X 3/4 17−1/2 (445)
- Page 48 f. Hot surface igniter. WARNING g. Flame−sensing electrode. h. Flame rollout switches. ELECTRICAL SHOCK HAZARD 6. Remove screws that fasten the collector box assembly to Failure to follow this warning could result in personal the cell panel. Be careful not to damage the collector box. injury, or death.
- Page 49 (3.) Work cable in and out of cell 3 or 4 times to ob- 17. Set thermostat above room temperature and check fur- tain sufficient cleaning. DO NOT pull cable with nace for proper operation. great force. Reverse drill and gradually work 18.
- Page 50 HPS are open, and starts the inducer motor IDM in is opened the BLWM is turned ON at high−heat air- flow. Simultaneously, the humidifier terminal HUM high−speed. and electronic air cleaner terminal EAC−1 are ener- a. Inducer Prepurge Period gized and remain energized throughout the heating (1.) If the furnace control CPU selects low−heat op- cycle.
- Page 51 closed. The blower motor BLWM will transition to c. Cooling off−delay−When the “call for cooling” is low−heat airflow five seconds after the R−to−W2 satisfied and there is a demand for dehumidification, circuit opens. the cooling blower−off delay is decreased from 90 seconds to 5 seconds.
- Page 52 delays have expired. Turn on setup switch SW1−6. (See After the component test is completed, 1 or more status codes Figure 26) (heartbeat, 2+5) will flash. See component test section or Service Label (Figure 51) for explanation of status codes. NOTE: The component test feature will not operate if the control is receiving any thermostat signals or until all time NOTE: To repeat component test, turn setup switch SW1−6 to...
- Page 53 Figure 56 − Troubleshooting Guide − Variable Speed 441 01 2122 01 Specifications are subject to change without notice.
- Page 54 441 01 2122 01 Specifications are subject to change without notice.
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Page 55: Parts Replacement Information Guide
The qualified installer or service agency must use only factory−authorized replacement parts, kits, or accessories when modifying this product. Copyright 2016 International Comfort Products Lewisburg, TN 37091 USA...