Variable Speed, 2-Stage
Upflow / Horizontal and Downflow / Horizontal,
Gas-Fired Furnaces, “Fan Assisted
Combustion System”
A341789P03
Installer’s Guide
Downflow / Horizontal* Upflow / Horizontal*
For VENT SIZING INFORMATION see:
USA —
National Fuel Gas Code ......... ANSI Z223.1/NFPA 54 (latest version)
CANADA —
Natural Gas Installation Code ...... CAN/CGA-B149.1 (latest version)
Propane Installation Code ............. CAN/CGA-B149.2 (latest version)
USA/CANADA ALTERNATE —
Category I Venting Guide ......... Pub. No. 18-CH23D1 (latest version)
*Horizontal Conversion for these furnaces may be left or right side rotation.
ALL phases of this installation must comply with NATIONAL, STATE AND LOCAL CODES
IMPORTANT — This Document is customer property and is to remain with this unit.
Please return to service information pack upon completion of work.
*__First letter may be “A” or “T”
18- CD20D1- 18
AVAILABLE IN FRENCH CANADIAN (FC)
*UD060R9V3K
*UD080R9V3K
*UD080R9V4K
*UD100R9V3K
*UD100R9V5K
*UD120R9V5K
*UD140R9V5K
*DD060R9V3F
*DD080R9V3F
*DD100R9V5F
*DD120R9V5F
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