Installation, Start-up, Operating and
Service and Maintenance Instructions
NOTE: Read the entire instruction manual before starting the installation.
TABLE OF CONTENTS
REQUIRED NOTICE FOR MASSACHUSETTS
INSTALLATIONS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 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
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 – Filter Media Pressure Drop (Clean) Versus Airflow - in. w.c.
(Pa) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 20
Table 8 – Filter Media Pressure Drop (Clean) Versus Face Velocity-
in. w.c. (Pa) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 20
Table 9 – Air Filter Selection and Duct Sizing - In. (mm) . . . . . 21
Table 10 – Air Filter Located in Filter Cabinet . . . . . . . . . . . . . . 21
AIR DUCTS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 22
GAS PIPING. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 23
Table 11 – Maximum Capacity of Pipe . . . . . . . . . . . . . . . . . . . . 24
ELECTRICAL CONNECTIONS. . . . . . . . . . . . . . . . . . . . . . . . . . . 25
Table 12 – Electrical Data . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 25
INTELISENSE™ TECHNOLOGY . . . . . . . . . . . . . . . . . . . . . . . . . 28
ACCESSORIES (See Fig. 37 and Fig. 38.) . . . . . . . . . . . . . . . . . . . 28
VENTING. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 29
Table 13 – Vent Termination Kit for Direct Vent (2-pipe) Systems30
Table 14 – Approved Combustion-Air and Vent Pipe, Fitting and Ce-
ment Materials . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 31
Table 15 – Maximum Equivalent Vent Length - Ft. . . . . . . . . . . 40
Table 16 – Deductions from Maximum Equivalent Vent Length - Ft.
(M) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 41
Table 17 – Maximum Allowable Exposed Vent Lengths in Uncondi-
tioned Space Insulation Table - Ft. . . . . . . . . . . . . . . . . . . . . . . . 44
Table 18 – Hanger Spacing . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 46
AIR DELIVERY - CFM. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 49
Table 19 – Air Delivery - CFM (with filter) . . . . . . . . . . . . . . . . 49
Table 20 – Default Airflow Settings . . . . . . . . . . . . . . . . . . . . . . 53
FURNACE CONTROL PROGRAMMING
AND NAVIGATION . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 53
Table 21 – System Status Display Codes . . . . . . . . . . . . . . . . . . 54
Table 22 – Main Menu Options. . . . . . . . . . . . . . . . . . . . . . . . . . 54
SERVICE LABEL . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 56
START-UP, ADJUSTMENT, AND SAFETY CHECK . . . . . . . . . 56
Table 23 – Test Sequence . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 57
WIRING DIAGRAM . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 58
ADJUSTMENTS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 59
Table 24 – Altitude Derate Multiplier for USA. . . . . . . . . . . . . . 60
Table 25 – Gas Rate (CU ft./hr). . . . . . . . . . . . . . . . . . . . . . . . . . 61
Table 26 – Orifice Size and Manifold Pressure (in. w.c.) for Gas Input
Rate . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 62
SERVICE AND MAINTENANCE PROCEDURES. . . . . . . . . . . . 64
ELECTRICAL CONTROLS AND WIRING . . . . . . . . . . . . . . . . . 64
CARE AND MAINTENANCE . . . . . . . . . . . . . . . . . . . . . . . . . . . . 65
WINTERIZATION. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 70
SEQUENCE OF OPERATION . . . . . . . . . . . . . . . . . . . . . . . . . . . . 71
TROUBLESHOOTING GUIDE . . . . . . . . . . . . . . . . . . . . . . . . . . . 74
GAS FURNACE CHECKLIST . . . . . . . . . . . . . . . . . . . . . . . . . . . . 77
PARTS REPLACEMENT INFORMATION GUIDE . . . . . . . . . . . 78
MODEL NOMENCLATURE . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 78
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/84/ or use the QR code below.
To learn more about InteliSense, go to Carrier.hvacpartners.com/InteliSense
or use the QR code below.
A230202
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.
59TP6C
Two-Stage, Non-Communicating, Variable 25-Speed,
ECM Multipoise, Condensing Gas Furnace
with InteliSense™
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