Fujitsu FF***LT96 Series: Communicating Two-Stage Variable Speed Multi-Position Gas Furnaces
Product Overview
The Fujitsu FF***LT96 Series offers advanced two-stage, variable speed technology for optimal comfort and energy efficiency. These multi-position gas furnaces are designed for reliable performance and ease of installation.
Key Features
- 96% residential gas furnace, CSA certified
- 4-way multi-poise design for flexible installation
- Two stages of operation for energy savings and consistent comfort
- Variable speed blower motor for enhanced humidity control, quiet operation, and year-round energy savings
- EcoNet® enabled for smart HVAC integration
- Diagnostic 7-Segment LED display
- DSI ignition system for reliability and longevity
- Water Management System with patented Blocked Drain Sensor
- Removable heat exchanger for improved serviceability, constructed with aluminized steel primary and stainless steel secondary for corrosion resistance
- Low profile 34-inch cabinet suitable for space-constrained installations
- Blower shelf design allows serviceability in all furnace orientations
- Pre-marked hoses for proper system drainage
- Compatible with 2" or 3" PVC venting
- Replaceable collector box
- Hemmed edges on cabinet and doors
- Quarter turn fasteners for tool-less access
- Integrated control boards with dip switches for easy system setup
- Self-priming condensate trap
- Solid bottom included
- Compatible with single or two-stage thermostats; two-stage thermostats recommended for optimal performance.
Specifications
| Model Numbers | FF60173LT96M | FF70173LT96M | FF85215LT96M | FF100215LT96M | FF115245LT96M |
|---|---|---|---|---|---|
| High Fire Input BTU/HR [kW] | 56,000 [16.41] | 70,000 [20.50] | 84,000 [24.61] | 98,000 [28.72] | 112,000 [32.82] |
| Low Fire Input | 39,200 [11.49] | 49,000 [14.36] | 58,800 [17.23] | 68,600 [20.11] | 78,400 [23.00] |
| Heating Capacity BTU/HR [kW] | 55,000 [16.12] | 68,000 [19.93] | 82,000 [24.03] | 95,000 [27.84] | 109,000 [31.94] |
| High Altitude Output (10% Derate) [kW] | 48,384 [14.18] | 60,480 [17.72] | 72,756 [21.27] | 84,672 [24.81] | 96,768 [28.36] |
| Blower (D x W) [mm] | 11 x 8 [279 x 203] | 11 x 8 [279 x 203] | 11 x 10 [279 x 254] | 11 x 10 [279 x 254] | 11 x 11 [279 x 279] |
| Motor H.P. [W] Type | 1/2 [373] E.O.M. | 1/2 [373] E.O.M. | 3/4 [559] E.O.M. | 3/4 [559] E.O.M. | 3/4 [559] E.O.M. |
| Min. Circuit Ampacity | 7.00 | 9.00 | 12.00 | 12.00 | 12.00 |
| Min. Overload Protection Device | 15.00 | 15.00 | 15.00 | 15.00 | 15.00 |
| Max. Overload Protection Device | 15.00 | 15.00 | 20.00 | 20.00 | 15.00 |
| AFUE | 96.00% | 96.00% | 96.00% | 96.00% | 96.00% |
Model Number Identification
The model number indicates key specifications:
- FF: Product Series
- Capacity: e.g., 060 = 56,000 BTU/HR, 115 = 112,000 BTU/HR
- Width: e.g., 17 = 17.5", 24 = 24.5"
- Airflow: e.g., 3 = Up To 3 Tons, 5 = Up To 5 Tons
- Motor: L = ECM
- Speed: T = Two-Stage
- Efficiency: 96 = 96%
- Orientation: M = Multipoise
Dimensional Data & Clearances
The furnaces feature a low profile 34-inch cabinet for flexible installation. Minimum clearances to combustibles are provided for safe operation:
| Model | Minimum Clearance (in.) [mm] | Flange Dimensions | ||||||
|---|---|---|---|---|---|---|---|---|
| Left Side | Right Side | Back | Top | Vent | A | B | C | |
| 060 | 0 | 0 | 1 [25] | 2 [51] | 0 | 17 1/2 [445] | 16 17/64 [413] | 16 13/64 [412] |
| 070 | 0 | 0 | 1 [25] | 2 [51] | 0 | 17 1/2 [445] | 16 17/64 [413] | 16 13/64 [412] |
| 085 | 0 | 0 | 1 [25] | 2 [51] | 0 | 21 [533] | 19 49/64 [502] | 19 45/64 [500] |
| 100 | 0 | 0 | 1 [25] | 2 [51] | 0 | 21 [533] | 19 49/64 [502] | 19 45/64 [500] |
| 115 | 0 | 0 | 1 [25] | 2 [51] | 0 | 24 1/2 [662] | 23 17/64 [591] | 23 13/64 [589] |
Note: A service clearance of at least 24" is recommended in front of all furnaces. Supply and return depicted as upflow configuration. Flange configuration will vary depending on installation orientation.
Blower Performance Data
The following table details blower performance (CFM [L/s]) across various speed settings (SW = Switch) for heating and cooling modes:
| Model Number | FF60173LT96M | FF70173LT96M | FF85215LT96M | FF100215LT96M | FF115245LT96M |
|---|---|---|---|---|---|
| High Heating CFM [L/s] (SW 15=OFF, SW 16=OFF) | 1025 [484] | 1015 [479] | 1470 [694] | 1710 [807] | 1450 [684] |
| High Heating CFM [L/s] (SW 15=ON, SW 16=OFF) | 880 [415] | 950 [448] | 1235 [583] | 1490 [703] | 1300 [614] |
| High Heating CFM [L/s] (SW 15=OFF, SW 16=ON) | 925 [437] | 1190 [562] | 1120 [529] | 1850 [873] | 1650 [779] |
| Target Gas Heating Airflow CFM [L/s] (SW 13=OFF, SW 14=OFF) | 780 [368] | 900 [425] | 1120 [529] | 1300 [614] | 1225 [578] |
| Low Heating CFM [L/s] (SW 13=ON, SW 14=OFF) | 750 [354] | 770 [363] | 1065 [503] | 1335 [630] | 1060 [500] |
| Low Heating CFM [L/s] (SW 13=OFF, SW 14=ON) | 1050 [496] | 1050 [496] | 1750 [826] | 1750 [826] | 1750 [826] |
| High Cooling CFM [L/s] (SW 4=OFF, SW 5=OFF) | 875 [413] | 875 [413] | 1400 [661] | 1400 [661] | 1400 [661] |
| High Cooling CFM [L/s] (SW 4=ON, SW 5=OFF) | 700 [330] | 700 [330] | 1225 [578] | 1225 [578] | 1225 [578] |
| Target Cooling/Heat-Pump Airflow CFM [L/s] (SW 4=OFF, SW 5=ON) | 788 [371] | 788 [371] | 1313 [618] | 1313 [618] | 1313 [618] |
| Low Cooling CFM [L/s] (SW 4=ON, SW 5=ON) | 525 [248] | 525 [248] | 1050 [496] | 1050 [496] | 1050 [496] |
Accessories
Various accessories are available to enhance the functionality and installation of the furnaces:
- Vent Termination Kits: RXGY-E02, RXGY-E02A, RXGY-E03, RXGY-E03A for concentric venting; RXGY-G02 for direct vent side wall venting.
- Combustion Air Drain Kits: RXGY-D05 (2"), RXGY-D06 (3").
- Neutralizer Kit: RXGY-A01.
- Filter Racks: External bottom (RXGF-CB), external side (RXGF-CD), and external downflow (RXGF-CC) options are available with specific filter size requirements.
- LP Conversion Kit: RXGJ-FP34 for converting natural gas to propane.
- Condensate Pump Kit: PROSTOCK & 1PCB151TUL.
- Conversion Kits: Downflow/Horizontal (RXGY-CK) and Left Zero Clearance (RXGY-ZK).
- Combustible Floor Base: RXGC-B17, RXGC-B21, RXGC-B24.
- High Altitude Heating Airflow Adjustment Kits: RXGY-58 through RXGY-63 for proper operation at various altitudes.
- EcoNet Control System: FETST601SYS, a recommended communicating furnace control offering advanced features for contractors and homeowners.
Limited Warranty
Fujitsu General America, Inc. provides a limited warranty on its products. Replacement parts are covered for Ten (10) Years, and the Heat Exchanger has a Limited Lifetime warranty. Conditional Unit Replacement is also covered for Ten (10) Years, provided registration is completed.
For complete details on Limited and Conditional Warranties, including applicable terms and conditions, contact your local contractor or Fujitsu General America, Inc. for a copy of the product warranty certificate.
