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 Z223.1−2009©, 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
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
manufacturer's participation in the program. For
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verification of certification for individual products,
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go to www.ahridirectory.org .
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WARNING
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PERSONAL INJURY, AND/OR PROPERTY
DAMAGE HAZARD
Failure to carefully read and follow this warning could
result in equipment malfunction, property damage,
personal injury and/or death.
Installation or repairs made by unqualified persons
could result in equipment malfunction, property
damage, personal injury and/or death.
The information contained in this manual is intended for
use by a qualified service technician familiar with safety
procedures and equipped with proper tools and test
instruments.
Installation must conform with local building codes and
with the Natural Fuel Gas Code (NFCG) NFPA
54/ANSI Z223.1, and National standards of Canada
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
Sept. 2010
441 01 2121 01
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Summary of Contents for HEIL F8MVL
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Page 1: Table Of Contents
INSTALLATION INSTRUCTIONS 80% Two−Stage, Variable Speed Category I, Gas Furnace F8MVL & G8MVL 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... - 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 discon- nects may be required. DO NOT TOUCH THE CON- Current edition of the NFGC and the NFPA 90B. For copies, TROL OR ANY WIRE CONNECTED TO THE CON- contact the National Fire Protection Association Inc., TROL PRIOR TO DISCHARGING YOUR BODY’S Batterymarch Park, Quincy, MA 02269;... - 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.
- Page 7 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.
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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 /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
The minimum dimension of air openings shall be at 4. Reinstall bottom filler panel and screws. least 3 in. (80 mm). (See Figure 8) Side Return Air Inlet c. Combining space on different floor levels. The These furnaces are shipped with bottom closure panel volumes of spaces on different floor levels shall be installed in bottom return−air opening. -
Page 11: Downflow Installation
3. Install another nut on other side of furnace base. (In- (plumber’s straps) may be used to suspend the furnace from stall flat washer if desired.) each bottom corner. To prevent screws from pulling out, use 2 #8 x in. screws into the side and 2 #8 x in. screws in the 4. - Page 12 place when side return air inlet(s) are used without a bottom Figure 13 − Furnace, Plenum, and Coil or Coil Casing return air inlet. Installed on a Combustible Floor Figure 12 − Furnace, Plenum, and Subbase Installed on a Combustible Floor FURNACE APPROVED COIL ASSEMBLY...
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Page 13: Filter Arrangement
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 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 * * 2000 CFM AND GREATER AT .6 ESP HI COOLING SPEED 441 01 2121 01...
- Page 17 Table 5 – Air Delivery − CFM (with filter)* External Static Pressure Airflow Range* Setting (In. W.C.) Unit Size Operating Mode 0701412 AIRFLOW (CFM) †† Low Heat 735† 0−0.50 High Heat 1180† 0−1.0 1160 1165 1175 1180 1180 1180 1180 1180 1180 1175...
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Page 18: 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 19: Electrical Connections
psig (14−In. W.C.) stated on gas control valve. (See ELECTRICAL CONNECTIONS Figure 49) WARNING Some installations require gas entry on right side of furnace (as viewed in upflow). (See Figure 21) Install a sediment trap in riser leading to furnace as shown in ELECTRICAL SHOCK HAZARD Figure 22. - Page 20 Table 7 – Electrical Data OPERATING VOLTS− UNIT MAX. UNIT MAX. WIRE MAX. FUSE OR MIN. WIRE HERTZ− VOLTAGE RANGE AMPACITY FURNACE SIZE AMPS LENGTH − FT (M)} CKT BKR AMPS { GAUGE PHASE Max. Min. 0701412 115−60−1 11.99 30 (9.0) 0901716 115−60−1 12.56...
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Page 21: Venting
13. Reinstall cover to J−Box. Do not pinch wires between 3. Secure BX cable to J−Box bracket with connectors ap- cover and bracket. proved for the type of cable used. Figure 24 − Field−Supplied Electrical Box on Furnace 4. Secure field ground wire to green ground screw on Casing J−Box bracket. - Page 22 Figure 25 − 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 NOTE 1 SINGLE...
- Page 23 WARNING WARNING CARBON MONOXIDE POISONING HAZARD CARBON MONOXIDE POISONING HAZARD Failure to follow the steps outlined below for each Failure to follow this warning could result in personal appliance connected to the venting system being placed injury or death. into operation could result in carbon monoxide Do not bypass the draft safeguard switch, as an poisoning or death.
- Page 24 Figure 28 − Variable Speed Furnace with Two−Stage Air Figure 30 − Variable Speed Furnace with Two−Stage Conditioner Heat 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 2121 01...
- Page 25 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.
- Page 26 Figure 34 − Chimney Inspection Chart A10133 441 01 2121 01...
- Page 27 Masonry Chimney Requirement rebuilt or relined to conform to the requirements of the equipment being installed and the authority hav- NOTE: These furnaces are CSA design−certified for use in ing jurisdiction. exterior tile−lined masonry chimneys with a factory accessory A chimney without a clay tile liner, which is otherwise in good Chimney Adapter Kit.
- Page 28 Vent dampers on any appliance connected to the common CAUTION vent can cause condensation and corrosion in the venting system. Do not use vent dampers on appliances common BURN HAZARD vented with this furnace. Additional Venting Requirements Failure to follow this caution may result in personal injury.
- Page 29 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 30 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 31 Figure 44 − Horizontal Left Application − Vent Elbow Up Figure 47 − Horizontal Right Application−Vent Elbow Left 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 32: Start−Up, Adjustment, And Safety Check
The horizontal portion of the venting system shall slope Figure 48 − Redundant Automatic Gas Control Valve upwards not less than 1/4−in. per linear ft. (21 mm/m) from the furnace to the vent and shall be rigidly supported every 5 REGULATOR COVER SCREW ft. -
Page 33: Start−Up Procedures
Start−Up Procedures c. Blower motor operates for 15 sec. d. Inducer motor goes to low−speed for 10 sec., then WARNING stops. e. After component test is completed, one or more status codes (heartbeat, 2+5, or 4+1) will flash. See FIRE AND EXPLOSION HAZARD component test section of service label (Figure 51) Failure to follow this warning could cause personal in furnace for explanation of status codes. - Page 34 Figure 51 − Service Label 441 01 2121 01...
- Page 35 Furnace gas input rate on rating plate is for installations at Table 12 – Blower Off Delay Setup Switch altitudes up to 2000 Ft. (610 M). Furnace input rate must be within +/−2 percent of furnace rating plate input. For altitudes SETUP SWITCH (SW−7 AND −8) DESIRED HEATING MODE above 5500 Ft.
- Page 36 c. When correct input is obtained, replace caps that not affect readings. This practice is particularly im- conceal gas valve regulator adjustment screws. portant with straight−run ducts. Main burner flame should be clear blue, almost b. When thermometer readings stabilize, subtract re- transparent (See Figure 53) turn−air temperature from supply−air temperature to d.
- Page 37 l. Proceed to Step 6, “Set Blower Off Delay” before 9. Set Airflow for Air Conditioning −Single Stage and High installing blower access door. Stage Cooling The ECM blower can be adjusted for a range of airflow 7. Set Blower Off Delay for Low Speed or High Speed cooling.
- Page 38 Table 14 – 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.
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Page 39: Check Safety Controls
Table 14 − 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. -
Page 40: Checklist
h. Re−install vent connector. WARNING NOTE: Should switch remain open longer than 3 minutes, furnace control board will lockout the furnace for 3 hours. To ELECTRICAL SHOCK, FIRE OR EXPLOSION reset furnace control board, turn thermostat below room HAZARD temperature or from HEAT to OFF and turn 115−v power Failure to follow this warning could result in personal OFF, then back ON. -
Page 41: Care And Maintenance
control LED is either flashing a heartbeat (bright−dim), 6. Component Test sequence will function as follows: on−solid, or flashing a status code. a. Inducer motor starts on high−speed and continues For an explanation of status codes, refer to service label to run until Step (d.) of component test sequence. - Page 42 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 0.58 0.60 0.62...
- Page 43 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 44 Table 16 – Filter Size Information − In. (mm) FILTER SIZE FURNACE CASING WIDTH SIDE BOTTOM FILTER TYPE RETURN RETURN 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 45 d. Limit overtemperature switch. WARNING e. Gas valve. f. Hot surface igniter. ELECTRICAL SHOCK HAZARD g. Flame−sensing electrode. Failure to follow this warning could result in personal h. Flame rollout switches. injury, or death. 6. Remove screws that fasten the collector box assembly Blower access door switch opens 115−v power to to the cell panel.
- Page 46 force cable. Gradually insert cable into upper supplied, corrosion−resistant, sheet metal screws loc- pass of cell. (See Figure 55) ated 180_ apart. (3.) Work cable in and out of cell 3 or 4 times to 16. Replace blower access door only if it was removed. obtain sufficient cleaning.
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Page 47: Sequence Of Operation
The wall thermostat “calls for heat”, closing the R−to−W (2.) If the furnace control CPU selects high−heat circuit. The furnace control performs a self−check, verifies the operation, the inducer motor IDM remains run- low−heat and high−heat pressure switch contacts LPS and ning at high−speed, and the high−heat pres- HPS are open, and starts the inducer motor IDM in sure switch relay HPSR is de−energized to... - Page 48 and continues to hold the gas valve GV−M open. If a. Switching from Low− to High−Heat − If the ther- the burner flame is not proved within two seconds, mostat R−to−W1 circuit is closed and the R−to−W2 the control CPU will close the gas valve GV−M, and circuit closes, the furnace control CPU will switch the control CPU will repeat the ignition sequence for the inducer motor IDM speed from low to high.
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Page 49: Wiring Diagram
input is turned ON when no dehumidify demand exists. long blower off times during demand defrost cycles. Once 24 vac is detected by the furnace control on the Whenever W/W1 is energized along with Y1 or Y/Y2, DHUM input, the furnace control operates in dehumidi- the furnace control CPU will transition to or bring on the fy mode. - Page 50 Figure 56 − Wiring Diagram 441 01 2121 01...
- Page 51 Figure 57 − Troubleshooting Guide − Variable Speed 441 01 2121 01...
- Page 52 441 01 2121 01...
- Page 53 441 01 2121 01...
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Page 54: Parts Replacement Information Guide
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 only)
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Questions and answers
Converting n80msn1102120a furnace to down flow
To convert a HEIL F8MVL furnace to downflow:
1. Install a bottom closure panel in the bottom return-air opening. This panel must be in place when only side return air is used.
2. Construct a working platform that meets all required furnace clearances.
3. For downflow on combustible flooring, use one of the approved Platform Furnace Support accessories:
- A downflow combustible floor subbase.
- Set the furnace on non-combustible blocks, bricks, or angle iron.
4. If installing in a crawlspace and the furnace is not suspended from floor joists, ensure the ground beneath the furnace is prepared accordingly.
5. Make sure strap attachment screws are loaded in shear (not in tension) and that the straps fit tightly against the furnace sides.
6. Reinstall the bottom closure panel if it was removed during setup.
This answer is automatically generated