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59MN7C
Modulating, High Efficiency Condensing Gas
Furnace, 4-Way Multipoise
Installation, Start-up, Operating and Service
NOTE: Read the entire instruction manual before starting the
installation.
TABLE OF CONTENTS
IMPORTANT . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2
Table 1 - Dimensions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3
SAFETY CONSIDERATIONS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3
Table 2 - Minimum Clearances to Combustible Materials for All Units
5
INTRODUCTION . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5
Table 3 - Loose Parts Bag . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6
CODES AND STANDARDS. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6
ELECTROSTATIC DISCHARGE (ESD) PRECAUTIONS PROCE-
DURE . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7
ACCESSORIES . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7
LOCATION . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7
AIR FOR COMBUSTION AND VENTILATION . . . . . . . . . . . . . . 8
Table 4 - Minimum Free Area Required for Each Combustion Air
Opening or Duct to Outdoors. . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9
Table 5 - Minimum Space Volumes for 100% Combustion, Ventila-
tion and Dilution Air from Outdoors . . . . . . . . . . . . . . . . . . . . . . . 9
CONDENSATE TRAP. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10
CONDENSATE DRAIN CONNECTION . . . . . . . . . . . . . . . . . . . . 12
INSTALLATION . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14
Table 6 - Opening Dimensions - In. (mm) . . . . . . . . . . . . . . . . . 17
FILTER ARRANGEMENT . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 18
Table 7 - Filter Information. . . . . . . . . . . . . . . . . . . . . . . . . . . . . 19
AIR DUCTS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 21
GAS PIPING. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 21
Table 8 - Maximum Capacity of Pipe . . . . . . . . . . . . . . . . . . . . . 22
ELECTRICAL CONNECTIONS. . . . . . . . . . . . . . . . . . . . . . . . . . . 23
Table 9 - Electrical Data . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 24
115-V WIRING . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 24
24-V WIRING . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 26
TEMPERATURE SENSORS. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 26
VENTING. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 27
Table 10 - Vent Termination Kit for
Direct Vent (2-pipe) Systems. . . . . . . . . . . . . . . . . . . . . . . . . . . . 28
Table 11 - Approved Combustion-Air and Vent Pipe,
Fitting and Cement Materials. . . . . . . . . . . . . . . . . . . . . . . . . . . . 28
Table 12 - Maximum Equivalent Vent Length - Ft. . . . . . . . . . . 37
Table 13 - Deductions from Maximum Equivalent Vent
Length-Ft.(M) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 38
Portions of the text and tables are reprinted from NFPA 54/ANSI Z223.1E, with permission of National Fire Protection Association, Quincy, MA
02269 and American Gas Association, Washington DC 20001. This reprinted material is not the complete and official position of the NFPA or ANSI
and Maintenance Instructions
37.) . . . . . . . . . . . . . . . . . . . 26
on the referenced subject, which is represented only by the standard in its entirety.
Table 14 - Maximum Allowable Exposed Vent Length in Uncondi-
tioned Space - Ft./M. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 41
Table 15 - Hanger Spacing . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 43
Table 16 - Air Delivery - CFM (with filter) . . . . . . . . . . . . . . . . 45
AND NAVIGATION . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 46
Table 17 - System Status Display Codes . . . . . . . . . . . . . . . . . . 46
Table 18 - Main Menu Options . . . . . . . . . . . . . . . . . . . . . . . . . . 47
SERVICE LABEL . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 49
START-UP, ADJUSTMENT, AND SAFETY CHECK . . . . . . . . . 49
Table 19 - Test Sequence . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 50
WIRING DIAGRAM . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 50
Table 20 - Altitude Derate Multiplier for U.S.A.* . . . . . . . . . . . 52
Table 21 - Gas Rate (CU ft./hr). . . . . . . . . . . . . . . . . . . . . . . . . . 54
Table 22 - Orifice Size and Manifold Pressure (in. w.c.) for Gas Input
Rate . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 55
Table 23 - Orifice Size and Manifold Pressure (in. w.c.) for Gas Input
Rate . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 55
SERVICE AND MAINTENANCE PROCEDURES. . . . . . . . . . . . 57
ELECTRICAL CONTROLS AND WIRING . . . . . . . . . . . . . . . . . 57
CARE AND MAINTENANCE . . . . . . . . . . . . . . . . . . . . . . . . . . . . 58
WINTERIZATION. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 63
SEQUENCE OF OPERATION . . . . . . . . . . . . . . . . . . . . . . . . . . . . 63
TROUBLESHOOTING . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 68
PARTS REPLACEMENT INFORMATION GUIDE . . . . . . . . . . . 71
MODEL NOMENCLATURE . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 71
TRAINING . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 71
To learn more about this appliance and installation via a mobile device,
go to
https://carrier.hvacpartners.com/NFC
access airflow tables or troubleshooting guide on your mobile device go
to
mlctraining.com/training/techdocs/104/
or use the QR code below. To
or use the QR code below.
A230294
A200352
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Summary of Contents for Carrier 59MN7C
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Page 1: Table Of Contents
59MN7C Modulating, High Efficiency Condensing Gas Furnace, 4-Way Multipoise Installation, Start-up, Operating and Service and Maintenance Instructions NOTE: Read the entire instruction manual before starting the Table 14 – Maximum Allowable Exposed Vent Length in Uncondi- installation. tioned Space - Ft./M........41 Table 15 –... -
Page 2: Required Notice For Massachusetts Installations
59MN7C: Installation, Start-up, Operating and Service and Maintenance Instructions REQUIRED NOTICE FOR MASSACHUSETTS INSTALLATIONS IMPORTANT The Commonwealth of Massachusetts requires compliance with regulation 248 CMR as follows: 5.08: Modifications to NFPA-54, Chapter 10 2) Revise 10.8.3 by adding the following additional requirements: a. -
Page 3: Safety Considerations
59MN7C: Installation, Start-up, Operating and Service and Maintenance Instructions A210796 Fig. 1 – Dimensional Drawing Table 1 – Dimensions SHIP WT. FURNACE SIZE BOTTOM LB (KG) CABINET WIDTH OUTLET WIDTH AIR INTAKE INLET WIDTH 060C17--14 17-1/2 (445) 15-7/8 (403) 16 (406) 8-3/4 (222) 144 (65.3) -
Page 4: Cut Hazard
59MN7C: Installation, Start-up, Operating and Service and Maintenance Instructions qualified installer, service agency, or your distributor or branch for WARNING information or assistance. The qualified installer or agency must use factory-authorized kits or accessories when modifying this product. FIRE, EXPLOSION, ELECTRICAL SHOCK, AND Refer to the individual instructions packaged with the kits or accessories when installing. -
Page 5: Introduction
59MN7C: Installation, Start-up, Operating and Service and Maintenance Instructions 3. Provide adequate combustion and ventilation air to the furnace NOTICE space as specified in “Air for Combustion and Ventilation” section. 4. Combustion products must be discharged outdoors. Connect this IMPORTANT INSTALLATION AND START-UP... -
Page 6: Codes And Standards
59MN7C: Installation, Start-up, Operating and Service and Maintenance Instructions and/or vent to fail prematurely, customer discomfort and/or vent freezing. Failure to follow these guidelines is considered faulty installation and/or misapplication of the furnace; and resulting failure, damage, or repairs may impact warranty coverage. -
Page 7: Dure
59MN7C: Installation, Start-up, Operating and Service and Maintenance Instructions Duct Systems 6. Before removing a new control from its container, discharge your body’s electrostatic charge to ground to protect the control from • US and CANADA: Current edition of Air Conditioning Contractors damage. -
Page 8: Air For Combustion And Ventilation
59MN7C: Installation, Start-up, Operating and Service and Maintenance Instructions • Hydrochloric acid WARNING • Cements and glues • Antistatic fabric softeners for clothes dryers CARBON MONOXIDE POISONING / COMPONENT • Masonry acid washing materials DAMAGE HAZARD All fuel-burning equipment must be supplied with air for fuel Failure to follow this warning could result in personal injury or death combustion. - Page 9 59MN7C: Installation, Start-up, Operating and Service and Maintenance Instructions a. One opening MUST commence within 12 in. (300 mm) of the WARNING ceiling and the second opening MUST commence within 12 in. (300 mm) of the floor. CARBON MONOXIDE POISONING HAZARD b.
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Page 10: Condensate Trap
59MN7C: Installation, Start-up, Operating and Service and Maintenance Instructions Remove pressure switch tube from pressure switch port. Remove relief tube from relief port on condensate trap. Remove tube from Remove trap from relief port. collector box. Loosen clamp on inlet to vent elbow. - Page 11 59MN7C: Installation, Start-up, Operating and Service and Maintenance Instructions NOTICE Remove trap from collector box. If alternate vent position is required, loosen clamp Remove relief tube on vent elbow inlet. from relief port on The field-supplied, accessory horizontal drain trap grommet is ONLY condensate trap.
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Page 12: Condensate Drain Connection
59MN7C: Installation, Start-up, Operating and Service and Maintenance Instructions manufacturer’s recommendations. Prime the trap before furnace Evaporator Coil operation. + + + The condensate drain line must be supported and/or secured per local + = Positive pressure codes. Supports and clamps should be spaced to prevent the drain line <... - Page 13 59MN7C: Installation, Start-up, Operating and Service and Maintenance Instructions The Z-pipe is long enough to extend across the casing for drain connections. 2. Locate the Z-pipe. Remove the pre-formed drain elbow and four spring clamps from the loose parts bag.
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Page 14: Horizontal Orientation
59MN7C: Installation, Start-up, Operating and Service and Maintenance Instructions 12. Align the Z-pipe with the long end of the grommet inside the 2. To allow for servicing the trap, the condensate drain elbow in the furnace and insert slightly. The angled end of the tube at the other loose parts bag can be used to make a coupler to allow for future side of the casing should be facing the front of the furnace. -
Page 15: Supply Air Connections
59MN7C: Installation, Start-up, Operating and Service and Maintenance Instructions LEVEL 0-IN. (0 MM) TO 1/2-IN. (13 MM) MAX MIN 1/4-IN. (6 MM) TO 1/2-IN. (13 MM) MAX UPFLOW OR HORIZONTAL DOWNFLOW ANY COMBINATION OF 1, 2, OR 3 PERMITTED. A11237 Fig. - Page 16 59MN7C: Installation, Start-up, Operating and Service and Maintenance Instructions CAUTION CUT HAZARD Failure to follow this caution may result in personal injury. Sheet metal parts may have sharp edges or burrs. Use care and wear appropriate protective clothing, safety glasses and gloves when handling parts, and servicing furnaces.
- Page 17 59MN7C: Installation, Start-up, Operating and Service and Maintenance Instructions Return Air Connections duct must be connected to ONLY the furnace supply-outlet-air duct flanges or air conditioning coil casing (when used). DO NOT cut main WARNING furnace casing side to attach supply air duct, humidifier, or other accessories.
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Page 18: Filter Arrangement
59MN7C: Installation, Start-up, Operating and Service and Maintenance Instructions FILTER ARRANGEMENT FURNACE FURNACE (OR COIL CASING WHEN USED) APPROVED WARNING COIL ASSEMBLY COIL BOX COMBUSTIBLE COMBUSTIBLE FLOORING FIRE, CARBON MONOXIDE AND POISONING FLOORING PLENUM OPENING HAZARD DOWNFLOW SUBBASE Failure to follow this warning could result in fire, personal injury or... - Page 19 59MN7C: Installation, Start-up, Operating and Service and Maintenance Instructions Refer to the instructions supplied with optional media cabinet or NOTICE accessory air filter for assembly and other details. See Table 7 for filter size details. Design the duct system FIRST to determine how much pressure drop Design the filter and associated ductwork for the best match of pressure may be allowed in the filter system.
- Page 20 59MN7C: Installation, Start-up, Operating and Service and Maintenance Instructions Optional Filter Media Pressure Drop (Clean) Versus Airflow - in. w.c. (Pa) (Continued) 1800 (850) 0.07 (18) 0.14 (35) 0.13 (34) 0.21 (53) 2000 (944) 0.08 (19) 0.16 (41) 0.16 (39) 0.24...
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Page 21: Air Ducts
59MN7C: Installation, Start-up, Operating and Service and Maintenance Instructions General Requirements The duct system should be designed and sized according to accepted national standards such as those published by: Air Conditioning Contractors Association (ACCA Manual D), Sheet Metal and Air... - Page 22 59MN7C: Installation, Start-up, Operating and Service and Maintenance Instructions appropriate straps, hangers, etc. Use a minimum of one hanger every 6 CAUTION ft. (2 M). Joint compound (pipe dope) should be applied sparingly and only to male threads of joints. Pipe dope must be resistant to the action FURNACE DAMAGE HAZARD of propane gas.
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Page 23: Electrical Connections
59MN7C: Installation, Start-up, Operating and Service and Maintenance Instructions union between furnace gas control valve and exterior manual equipment WARNING gas shutoff valve. ELECTRICAL SHOCK HAZARD Failure to follow this warning could result in personal injury or death. Blower door switch opens 115-V power to control. No component operation can occur. -
Page 24: 115-V Wiring
59MN7C: Installation, Start-up, Operating and Service and Maintenance Instructions Table 9 – Electrical Data MODULATING MAXIMUM OPERATING VOLTAGE VOLTS- MINIMUM MAXIMUM FUSE WIRE LENGTH FURNACE MAX UNIT UNIT RANGE HERTZ- WIRE SIZE OR CKT BKR ‡ † FT (M) SIZE... -
Page 25: Power Cord Installation In Furnace J-Box
59MN7C: Installation, Start-up, Operating and Service and Maintenance Instructions be omitted when electrical connections are made inside an external casing. Do not remove the knockout or plug in the side of the electrical box mounted external to the casing. casing. -
Page 26: 24-V Wiring
59MN7C: Installation, Start-up, Operating and Service and Maintenance Instructions Communication Connector is used when the furnace is controlled by an 6. Route SAT wire leads into furnace blower compartment along with optimum communicating User Interface, see Fig. the thermostat wires. Use provided grommet to protect the wires through the furnace casing. -
Page 27: Venting
59MN7C: Installation, Start-up, Operating and Service and Maintenance Instructions certified to this standard. In Canada, the primer and cement must be of the same manufacturer as the vent system – GVS-65 Primer (Purple) for To HUM Terminal On Royal Pipe or IPEX System 636, PVC/CPVC Primer, Purple Violet for... -
Page 28: Direct Vent (2-Pipe) Systems
59MN7C: Installation, Start-up, Operating and Service and Maintenance Instructions NOTICE WARNING CARBON MONOXIDE POISONING HAZARD RECOMMENDED SUPPORT FOR VENT TERMINATION Failure to follow the instructions outlined below for each appliance being placed into operation could result in carbon monoxide poisoning It is recommended that sidewall vent terminations of over 24 inches or death. - Page 29 59MN7C: Installation, Start-up, Operating and Service and Maintenance Instructions described below. Common venting between these furnaces or other WARNING appliances is prohibited. Materials CARBON MONOXIDE POISONING HAZARD U.S.A. Failure to follow the steps outlined below for each appliance connected to the venting system being placed into operation could result in carbon Combustion air and vent pipe, fittings, primers, and solvents must monoxide poisoning or death.
- Page 30 59MN7C: Installation, Start-up, Operating and Service and Maintenance Instructions 12 in. (305mm) min. separation between bottom of combustion air and bottom of vent (Typ.) A13305 Fig. 39 – Combustion Air and Vent Pipe Termination for Direct Vent (2-Pipe) System A05091 Fig.
- Page 31 59MN7C: Installation, Start-up, Operating and Service and Maintenance Instructions A190032 Fig. 41 – Inside Corner Termination Inside Corner Terminations Inside corner vent terminations are permitted provided that: • Only two exterior walls come together to form an angle of 90 degrees to 135 degrees. There are no other exterior walls attached to either wall to form an alcove.
- Page 32 59MN7C: Installation, Start-up, Operating and Service and Maintenance Instructions A12326 Fig. 42 – Direct Vent Termination Clearance NOTE: The following is based upon National codes for gas appliances and is provided as a reference. Refer to local codes which may supersede these standards and/or recommendations.
- Page 33 59MN7C: Installation, Start-up, Operating and Service and Maintenance Instructions A12325 Fig. 43 – Ventilated Combustion Air and Non-Direct Vent Termination Clearance NOTE: The following is based upon National codes for gas appliances and is provided as a reference. Refer to local codes which may supersede these standards and/or recommendations.
- Page 34 59MN7C: Installation, Start-up, Operating and Service and Maintenance Instructions When determining appropriate location for termination, consider the WARNING following guidelines: 1. Comply with all clearance requirements stated in Fig. 42 Fig. 43 CARBON MONOXIDE POISONING HAZARD per application. Failure to follow the instructions outlined below for each appliance 2.
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Page 35: Size The Vent And Combustion Air Pipes
59MN7C: Installation, Start-up, Operating and Service and Maintenance Instructions Size the Vent and Combustion Air Pipes Termination Requirements for the Provinces of Alberta and Saskatchewan Furnace combustion air and vent pipe connections are sized for 2-in. (50 The Provinces of Alberta and Saskatchewan require a minimum mm ND) PVC/ABS DWV pipe. - Page 36 59MN7C: Installation, Start-up, Operating and Service and Maintenance Instructions To prevent moisture from trickling into the furnace vestibule, a trap can be installed in the intake air pipe near the furnace. To prevent moisture, connecting a drain line to the trap is recommended as trace amounts of moisture will evaporate into the intake air stream.
- Page 37 59MN7C: Installation, Start-up, Operating and Service and Maintenance Instructions 3. For each pipe, multiply the number of elbows by the equivalent Vent Length is still longer than the longer TEVL of the vent pipe or length for the type of elbow used. Record the equivalent length of combustion air pipe, then that diameter of pipe selected may be used.
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Page 38: Combustion Air And Vent Piping Insulation Guidelines
59MN7C: Installation, Start-up, Operating and Service and Maintenance Instructions A13110 Table 13 – Deductions from Maximum Equivalent Vent Length-Ft.(M) Pipe Diameter (in): 1-1/2 2-1/2 Mitered 90º Elbow (2.4) (2.4) (2.4) (2.4) (2.4) Medium Radius 90º Elbow (1.5) (1.5) (1.5) (1.5) (1.5) - Page 39 59MN7C: Installation, Start-up, Operating and Service and Maintenance Instructions 2. Rotate the vent elbow to the required position. There are rounded notches in the vent elbow to align it with the inducer housing for each orientation. 3. Tighten the clamp around the vent elbow. Torque the clamp to 15 lb-in, see Fig.
- Page 40 59MN7C: Installation, Start-up, Operating and Service and Maintenance Instructions A11327A HORIZONTAL LEFT-VERTICAL VENT CONFIGURATION A11336 HORIZONTAL RIGHT-LEFT VENT CONFIGURATION A11328A HORIZONAL LEFT-LEFT VENT CONFIGURATION A11335 HORIZONTAL RIGHT-RIGHT VENT CONFIGURATION Fig. 56 – Horizontal Right (Appearance may vary) See “Notes for Venting Options”...
- Page 41 59MN7C: Installation, Start-up, Operating and Service and Maintenance Instructions Table 14 – Maximum Allowable Exposed Vent Length in Unconditioned Space - Ft./M 40,000* BTUH 60,000 BTUH Unit Size 3/8-in. 1/2-in. Uninsulated Uninsulated 3/8-in. Insulation 1/2-in. Insulation Insulation Insulation Winter Pipe Dia.
- Page 42 59MN7C: Installation, Start-up, Operating and Service and Maintenance Instructions Installing the Vent Pipe Adapter and Combustion Air Install the remaining vent and combustion air pipes as shown below. It is recommended that all pipes be cut, prepared, and preassembled before Pipe Adapter permanently cementing any joint.
- Page 43 59MN7C: Installation, Start-up, Operating and Service and Maintenance Instructions Table 15 – Hanger Spacing Cut the required number of holes in the roof or sidewall for vent and (when used) combustion air pipes. Sidewall holes for two-pipe vent Material terminations should be side-by-side, allowing space between the pipes...
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Page 44: Venting System Length Calculations
59MN7C: Installation, Start-up, Operating and Service and Maintenance Instructions Inducer Outlet Restrictor mm) away from the first two terminations. It is important that vent terminations be made as shown in Fig. 39 to avoid recirculation of vent The loose parts bag may contain an inducer outlet restrictor. The outlet gases. - Page 45 59MN7C: Installation, Start-up, Operating and Service and Maintenance Instructions Table 16 – Air Delivery - CFM (with filter) 060C17--14 Available Cooling Airflow Settings (CFM) † 1000 1050 1138 1200 1300 1225 ‡ Available Constant Fan Airflow Settings (CFM) 1000 1050 Airflow ESP (in.
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Page 46: Furnace Control Programming
59MN7C: Installation, Start-up, Operating and Service and Maintenance Instructions Table 16 – Air Delivery - CFM (with filter) (Continued) 120C24--22 1000 1050 1138 1200 1225 Available Cooling 1300 Airflow Settings (CFM † 1400 1480 1600 1625 1850 1911 2000 2110 1750 ‡... -
Page 47: Bluetooth Module
Scan the mobile app QR code on the front page of this document, or 1. Use the supported mobile app to flash the model program onto the search your app store for Carrier Service Technician to download. The board using Near Field Communication (NFC). Scan the QR code app is available on phone and tablet devices. - Page 48 59MN7C: Installation, Start-up, Operating and Service and Maintenance Instructions CAUTION FURNACE OVERHEATING HAZARD Failure to follow this caution could result in reduced furnace life. Do NOT program the control board with a Model Program Number different than what is specified on the rating plate. Parameter options will not match design values.
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Page 49: Service Label
59MN7C: Installation, Start-up, Operating and Service and Maintenance Instructions SERVICE LABEL A230348 Fig. 59 – Service Label Information START-UP, ADJUSTMENT, AND SAFETY WARNING CHECK ELECTRICAL SHOCK HAZARD NOTICE Failure to follow this warning could result in personal injury, or death. -
Page 50: Wiring Diagram
59MN7C: Installation, Start-up, Operating and Service and Maintenance Instructions Table 19 – Test Sequence Display Operating Mode Function Test Confirms start of Component Test mode. Purge Inducer ON High for 10 seconds before next stage. Inducer remains ON for test duration. - Page 51 59MN7C: Installation, Start-up, Operating and Service and Maintenance Instructions 3. Pour one quart (liter) of water into funnel/tube. Water should run CAUTION through collector box, overfill condensate trap, and flow into open field drain. UNIT OPERATION HAZARD 4. Remove funnel; replace collector box drain plug.
- Page 52 59MN7C: Installation, Start-up, Operating and Service and Maintenance Instructions To adjust manifold pressure to obtain the proper input rate, first, determine if the furnace has the correct orifice installed. At higher altitudes or different gas heat contents, it may be necessary to change the factory orifice to a different orifice.
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Page 53: Fire Hazard
59MN7C: Installation, Start-up, Operating and Service and Maintenance Instructions 2. Loosen set screw on inlet tower pressure tap no more than one full turn with a 3/32-in. hex wrench or remove the 1/8 in. NPT plug from the inlet pressure tap on the gas valve. - Page 54 59MN7C: Installation, Start-up, Operating and Service and Maintenance Instructions 3. After the main burners ignite and the blower starts, confirm WARNING Minimum Heat manifold pressure is correct, based on the manifold pressure tables in the installation instructions. FIRE HAZARD 4. To adjust the Minimum Heat manifold pressure, slowly turn...
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Page 55: Rate
59MN7C: Installation, Start-up, Operating and Service and Maintenance Instructions Table 22 – Orifice Size and Manifold Pressure (in. w.c.) for Gas Table 23 – Orifice Size and Manifold Pressure (in. w.c.) for Gas Input Rate Input Rate To Be Used with Modulating Furnaces EXCEPT 59MN7C060C21--20... -
Page 56: Adjust Temperature Rise
59MN7C: Installation, Start-up, Operating and Service and Maintenance Instructions Adjust Temperature Rise 4. Refer to the FURNACE CONTROL PROGRAMMING AND NAVIGATION section of this manual for instructions on adjusting NOTE: Blower door must be installed when taking temperature rise the blower speed. -
Page 57: Service And Maintenance Procedures
59MN7C: Installation, Start-up, Operating and Service and Maintenance Instructions CAUTION WARNING FURNACE OVERHEATING HAZARD FIRE, INJURY OR DEATH HAZARD Failure to follow this warning could result in personal injury, death Failure to follow this caution may result in reduced furnace life. -
Page 58: Shock Hazard
59MN7C: Installation, Start-up, Operating and Service and Maintenance Instructions from heating. The control system also requires an earth ground for 4. Inspect burner compartment before each heating season for rust, proper operation of the control and flame-sensing electrode. corrosion, soot or excessive dust. If necessary, have furnace and burner serviced by a qualified service agency. -
Page 59: Blower Motor And Wheel Maintenance
59MN7C: Installation, Start-up, Operating and Service and Maintenance Instructions blower wheel vanes. Do not bend wheel or blades as balance will be WARNING affected. 7. If greasy residue is present on blower wheel, remove wheel from ELECTRICAL SHOCK, FIRE OR EXPLOSION HAZARD the blower housing and wash it with an appropriate degreaser. - Page 60 59MN7C: Installation, Start-up, Operating and Service and Maintenance Instructions 19. Turn on gas supply and cycle furnace through one complete heating 5. Disconnect the gas pipe from gas valve and remove pipe from the cycle. Verify the furnace temperature rise as shown in Adjustments furnace casing.
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Page 61: Flushing Collector Box And Drainage System
59MN7C: Installation, Start-up, Operating and Service and Maintenance Instructions Servicing Hot Surface Igniter 6. Attach the green/yellow wire and ground terminal to one of the manifold mounting screws. The igniter does NOT require annual inspection. Check igniter 7. Install the remaining manifold mounting screws. -
Page 62: Cleaning Heat Exchangers
59MN7C: Installation, Start-up, Operating and Service and Maintenance Instructions 11. Remove the relief tube from the port on the collector box and the 1. Check for signs of physical damage to heat tape such as nicks, cuts, trap. abrasions, gnawing by animals, etc. -
Page 63: Winterization
59MN7C: Installation, Start-up, Operating and Service and Maintenance Instructions 9. Refer to furnace wiring diagram and reconnect wires to flame 5. Connect a field supplied 3/8-in. (9.5-mm) ID tube to the open port rollout switch, gas valve, igniter, and flame sensor. - Page 64 59MN7C: Installation, Start-up, Operating and Service and Maintenance Instructions Fig. 38 for thermostat connections. 2. Igniter Warm-Up - At the end of the prepurge period, the Hot-Surface Igniter HSI is energized for a 17-second igniter NOTE: Heating Thermostat Type (Htt) set to (2St-LHt) selects the warm-up period minimum-heat only operation.
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Page 65: Cooling Mode
59MN7C: Installation, Start-up, Operating and Service and Maintenance Instructions medium pressure switch MPS closes the inducer motor RPM is The start up and shut down functions and delays described above apply noted by the furnace control CPU. The RPM is used to evaluate to the 2-stage minimum/maximum heating mode as well, except for vent system resistance. - Page 66 59MN7C: Installation, Start-up, Operating and Service and Maintenance Instructions b. Single-Stage Thermostat and Two-Speed Cooling (Adaptive to the furnace control thermostat terminal DHUM. When there is a Mode) - dehumidify demand, the DHUM input is activated, which means 24 Fig. 38 for thermostat connections.
- Page 67 59MN7C: Installation, Start-up, Operating and Service and Maintenance Instructions change the active continuous fan speed to the next speed (CF2CF3). Repeating again will set the active continuous fan back to the primary speed (CFn). This method is intended as a way for home owners to adjust the continuous fan speed setting from the thermostat depending on their needs.
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Page 68: Troubleshooting
59MN7C: Installation, Start-up, Operating and Service and Maintenance Instructions TROUBLESHOOTING A230358 Troubleshooting Guide (continued) Manufacturer reserves the right to change, at any time, specifications and designs without notice and without obligations. - Page 69 59MN7C: Installation, Start-up, Operating and Service and Maintenance Instructions A230359 Troubleshooting Guide (continued) Manufacturer reserves the right to change, at any time, specifications and designs without notice and without obligations.
- Page 70 59MN7C: Installation, Start-up, Operating and Service and Maintenance Instructions A230360 Fig. 71 – Troubleshooting Guide Manufacturer reserves the right to change, at any time, specifications and designs without notice and without obligations.
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Page 71: Parts Replacement Information Guide
59MN7C: Installation, Start-up, Operating and Service and Maintenance Instructions PARTS REPLACEMENT INFORMATION GUIDE Casing Group Gas Control Group Blower door Burner Bottom plate Flame sensor Control door Gas valve Door knob assembly Hot surface igniter Top filler plate Manifold Electrical Group... - Page 72 59MN7C: Installation, Start-up, Operating and Service and Maintenance Instructions © 2023 Carrier. All rights reserved. Edition Date: 08/23 Catalog No: 59MN7C-01SI Replaces: NEW Manufacturer reserves the right to change, at any time, specifications and designs without notice and without obligations.
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