Carrier 59TN6C - User Manual

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Installation, Start-up, Operating,

Service and Maintenance Instructions

NOTE: Read the entire instruction manual before starting the installation.

TABLE OF CONTENTS

REQUIRED NOTICE FOR MASSACHUSETTS INSTALLATIONS2

IMPORTANT . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2

Table 1 – Dimensions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3

SAFETY CONSIDERATIONS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3

Table 2 – Minimum Clearances to Combustible Materials for All Units

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. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11

Condensate Drain Connection . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13

INSTALLATION . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 16

Table 6 – Opening Dimensions - In. (mm) . . . . . . . . . . . . . . . . . 18

Filter Arrangement . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 19

Table 7 – Optional Filter Media Pressure Drop (Clean) Versus Airflow

- in. w.c. (Pa) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 20

Table 8 – Optional Filter Media Pressure Drop (Clean) Versus Face

Velocity- in. w.c. (Pa) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 21

Table 9 – Air Filter Selection and Duct Sizing - In. (mm) . . . . . 21

AIR DUCTS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 22

GAS PIPING. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 23

Table 10 – Maximum Capacity of Pipe . . . . . . . . . . . . . . . . . . . . 23

ELECTRICAL CONNECTIONS. . . . . . . . . . . . . . . . . . . . . . . . . . . 24

Table 11 – Electrical Data . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 25

115-V Wiring . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 25

24-V Wiring . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 27

TEMPERATURE SENSORS. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 27

Accessories (See Fig. 38 and Fig. 39) . . . . . . . . . . . . . . . . . . . . . . . 27

VENTING. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 29

Table 12 – Vent Termination Kit for Direct Vent (2-pipe) Systems30

Table 13 – Approved Combustion-Air and Vent Pipe, Fitting and Ce-

ment Materials . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 31

Table 14 – Maximum Equivalent Vent Length - Ft. . . . . . . . . . . 41

Table 15 – Deductions from Maximum Equivalent Vent Length - Ft.

(M) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 41

Table 16 – Maximum Allowable Exposed Vent Lengths in Uncondi-

tioned Space Insulation Table - Ft./M . . . . . . . . . . . . . . . . . . . . . 44

Table 17 – Hanger Spacing . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 47

AIRFLOW DELIVERY - CFM . . . . . . . . . . . . . . . . . . . . . . . . . . . . 49

Table 18 – Air Delivery - CFM (with filter) . . . . . . . . . . . . . . . . 49

FURNACE CONTROL PROGRAMMING

AND NAVIGATION . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 51

Table 19 – System Status Display Codes . . . . . . . . . . . . . . . . . . 51

Table 20 – Main Menu Options. . . . . . . . . . . . . . . . . . . . . . . . . . 51

SERVICE LABEL . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 53

START-UP, ADJUSTMENT, AND SAFETY CHECK . . . . . . . . . 54

Table 21 – Test Sequence . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 54

WIRING DIAGRAM . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 55

Adjustments . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 56

Table 22 – Altitude Derate Multiplier for U.S.A. . . . . . . . . . . . . 57

Table 23 – Gas Rate (CU ft./hr). . . . . . . . . . . . . . . . . . . . . . . . . . 58

Table 24 – Orifice Size and Manifold Pressure (in. w.c.) for Gas Input

Rate . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 59

SERVICE AND MAINTENANCE PROCEDURES. . . . . . . . . . . . 60

Electrical Controls and Wiring . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 61

Care and Maintenance . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 62

WINTERIZATION. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 67

SEQUENCE OF OPERATION . . . . . . . . . . . . . . . . . . . . . . . . . . . . 67

TROUBLESHOOTING . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 71

PARTS REPLACEMENT INFORMATION GUIDE . . . . . . . . . . . 74

MODEL NOMENCLATURE . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 74

TRAINING. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 74

To learn more about this appliance and installation via a mobile device,

go to https://carrier.hvacpartners.com/NFC or use the QR code below. To

access airflow tables or troubleshooting guide on your mobile device go

to mlctraining.com/training/techdocs/98/ or use the QR code below.

A230288

A200352

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

on the referenced subject, which is represented only by the standard in its entirety.

59TN6C

Two-Stage, Variable-Speed, Multipoise

35 in. (889 mm) Tall, Condensing Gas Furnace

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Do you have a question about the Carrier 59TN6C and is the answer not in the manual?

This document describes the Carrier 59TN6C Two-Stage, Variable-Speed, Multipoise 35 in. (889 mm) Tall, Condensing Gas Furnace, providing comprehensive instructions for its installation, start-up, operation, service, and maintenance.

Function Description:

The Carrier 59TN6C is a 4-way multipoise Category IV condensing gas furnace, CSA design-certified for use with natural and propane gases. It can be installed as a direct-vent (2-pipe) or non-direct vent (1-pipe) system. The furnace is factory-shipped for natural gas and can be converted to propane gas with a factory-supplied conversion kit. It is designed for indoor installation in various settings such as alcoves, attics, basements, closets, utility rooms, crawlspaces, and garages. It is not approved for installation in mobile homes, recreational vehicles, or outdoors. The furnace provides heating and can be integrated with cooling coils for air conditioning. It features a variable-speed blower for optimized airflow and a two-stage heating operation, which can be controlled by either a single-stage or two-stage thermostat, or a communicating User Interface.

Important Technical Specifications:

Fuel Type: Natural gas (factory-shshipped), convertible to propane gas with an approved kit.
Mounting: 4-way multipoise (upflow, downflow, horizontal left, horizontal right).
Minimum Return-Air Temperature: 60°F (15°C) db continuous, 55°F (13°C) db intermittent.
Maximum Return-Air Temperature: 80°F (27°C) db.
Cabinet Air Leakage: Less than 2% at 1.0 in. w.c. and less than 1.4% at 0.5 in. w.c. (ASHRAE Standard 193).
Electrical Supply: 115-V, 60 Hz, 1-phase.
24-V Circuit Fuse: 3-amp automotive-type.
Vent Pipe Connections: 2-in. (50 mm ND) PVC/ABS DWV pipe, or 60 mm polypropylene venting systems.
Condensate Drain Slope: Minimum 1/4-in. per foot (20 mm per meter) in horizontal sections.
Gas Supply Pressure (Natural Gas): Minimum 4.5 in. w.c. (0.16 psig), maximum 13.6 in. w.c. (0.5 psig).
Manifold Pressure (Natural Gas): High heat: 3.4-in. w.c. (847 Pa); Low heat: 1.4-in. w.c. (349 Pa).
Altitude Derate: Input rating reduced by 2% per 1000 ft (304.8M) above 2000 ft (609.6M) in USA; 5% for 2000-4500 ft (609.6-1371.6M) in Canada.
Filter Type: External filter required; no internal filter rack. Optional media filter cabinet (1-inch or 4-inch thick media).
Temperature Sensors: Return Air Temperature (RAT) sensor (installed on control board), Supply Air Temperature (SAT) sensor (field-installed).

Usage Features:

Multipoise Design: Allows for flexible installation in upflow, downflow, horizontal left, or horizontal right orientations.
On-Board Control Method: Equipped with a 3-digit LCD display and pushbuttons for adjusting operating parameters, diagnostics, and service. Displays current operating mode, active fault codes, and allows for setting heating/cooling airflow, blower-OFF delays, thermostat types, and display orientation.
NFC and Supported App Method: Features Near Field Communication (NFC) and Bluetooth wireless technology for programming and diagnostics via a field-supplied mobile device and app. This allows for flashing model programs, accessing airflow tables, and troubleshooting guides.
Adaptive Heating Mode: When controlled by a single-stage thermostat, the furnace CPU adaptively selects low-heat or high-heat operation based on previous heating cycle history.
Two-Stage Operation: Supports two-stage heating and cooling for enhanced comfort and efficiency.
Dehumidification Mode: Can be integrated with a dehumidification thermostat to reduce blower airflow (86% or 65% of normal cooling airflow) during dehumidify demand.
Continuous Fan Mode: Operates the blower at a continuous fan airflow, with adjustable speeds.
Component Self-Test: A diagnostic feature to verify the proper functioning of furnace components.

Maintenance Features:

Filter Maintenance: External filters must be checked and cleaned monthly or more frequently, and replaced if torn. The filter should be installed with the airflow direction arrow pointing toward the blower.
Blower Motor and Wheel Maintenance: Annual cleaning of accumulated dirt and grease from the blower wheel and motor is recommended for long life and efficiency. The inducer and blower motors are pre-lubricated and do not require additional lubrication.
Burner and Flame Sensor Cleaning: Periodic cleaning of burners with a brush and vacuum, and the flame sensor with fine steel wool (0000 grade), is recommended.
Condensate Drain and Trap Cleaning: The condensate trap should be primed with water before operation. The drain lines and trap should be flushed with warm water and cleaned periodically.
Heat Exchanger Inspection: Annual inspection for rust, corrosion, soot, or excessive dust. Heavy accumulation of soot/carbon may necessitate replacement rather than cleaning.
Vent Pipe/System Inspection: Annual inspection for water leakage, sagging pipes, or broken fittings.
Winterization: Procedures for draining and filling the condensate trap with propylene glycol (RV/swimming pool antifreeze) are provided for installations in unconditioned spaces where temperatures may drop below 32°F (0°C).
Fault Code Retrieval: The control board stores the last 7 fault codes in memory, which can be retrieved via the on-board display or mobile app. Faults remain in memory for 72 hours of powered operation or can be manually cleared.
Troubleshooting Guide: A comprehensive guide is provided to assist in identifying problems and failed components.