Reznor SFT Unit Installation Manual - Manual (Page 2)

Form RZ -NA-I-SFT, Mfg No. 173474 (Rev 6), Page 1
APPLIES TO: Installation/Operation/Service
Model SFT
Gas-Fired,
Separated-Combustion,
Power-Vented Unit Heaters
INSTALLATION FORM RZ-I-SFT
Obsoletes Form RZ 432 (Version C)
Table of Contents
Installation and Operation ......................................................... Paragraphs 1-17 .................... Pages 1-15
Check Installation and Start-Up .................................................... Paragraph 18 .................. Pages 16-17
Maintenance/Troubleshooting/Service ................................... Paragraphs 19-31 .................. Pages 18-24
WARNING: Gas-fired appliances are not
designed for use in hazardous atmospheres
containing flammable vapors or combustible
dust. See Hazard Levels, page 2.
Index By Page No.
Burner Orifices ........................................ 19
Burner Removal ....................................... 18
Burners .................................................... 14
Check Installation and Start-Up .............. 16
Clearances .................................................. 3
Combustion Air ......................................... 6
Combustion Air Proving Switch ........ 14, 21
Concentric Adapter Box ............................ 6
Dimensions ................................................ 5
Downturn Nozzles (Option Kit) ................ 2
Electrical Supply and Connections .......... 13
Fan ........................................................... 20
Fan Motor ................................................ 13
Flame Rollout Switch .............................. 21
Gas Piping and Pressures ........................ 12
Gas Valve ........................................... 14, 21
Index By Page No.
Rating Plate .......................................... 23
Serial No. .............................................. 23
Service .................................................. 18
Start-Up ................................................ 16
Suspending ............................................. 3
Thermostat ............................................ 13
Troubleshooting .................................... 21
Uncrating and Preparation ...................... 2
Vent/Combustion Air System ........... 6, 21
Horizontal Vent Terminal/
Combustion Air Inlet (Opt CC6) ...... 7-9
Vertical Vent Terminal/Combustion
Air Inlet (Opt CC2) .................... 10-11
Venter Motor ........................................ 20
Warranty ................................................. 2
Wiring Diagram .................................... 15
Index By Page No.
General .................................................... 1
Hazard Intensity Levels ........................... 2
Heat Exchanger ..................................... 19
High Altitude Combustion Air
Pressure Switch ...................... 3, 13
High Altitude Operation ........................ 3
Ignition Control Module ....................... 14
Ignition Control Module LED
Codes ..................................... 14, 21
Ignition System ................................ 14, 19
Installation Codes .................................... 2
Limit Control ......................................... 21
Location (Heater) ..................................... 3
Louvers, Vertical (Option Kit) ................. 2
Maintenance .......................................... 18
Manifold Pressure .................................. 13
FOR YOUR SAFETY
What to do if you smell gas:
• Do not try to light any appliance.
• Do not touch any electrical switch; do
not use any phone in your building.
• Immediately call your gas supplier from
a neighbor's phone. Follow the gas
supplier's instructions.
• If you cannot reach your gas supplier,
call your fire department.
Do not store or use gasoline or other flammable
vapors and liquids in the vicinity of this or any
other appliance.
WARNING: Improper installation, adjustment,
alteration, service, or maintenance can cause
property damage, injury, or death. Refer to this
manual. For assistance or additional information,
consult a qualified installer, service agency, or
the gas supplier.
Models SFT 45, 60 and 75 are certified for both residential and commercial/industrial installations.
Models SFT 100-300 are certified for commercial/industrial installations only.
REFERENCES: Replacement Parts, Form RZ-NA-P-FT/SFT
Gas Conversion, Form RZ-NA-I-FT/SFT-GC
GENERAL
Installation should be done by a qualified agency in accordance with
the instructions in this manual and in compliance with all codes and
requirements of authorities having jurisdiction. The instructions in this
manual apply to the separated-combustion unit heater model shown
below.
Model Description
SFT Separated-Combustion,
Fan-Type, Suspended
Unit Heater
All sizes of Model SFT heaters are design-certified by the Canadian
Standards Association (CSA) to ANSI Z83.8a and CGA 2.6a for in-
dustrial/commercial installations in the United States and Canada. Mod-
els SFT 45, 60 and 75 are approved by the Canadian Standards Asso-
ciation to CSA 10-96 for residential installations in both the United
States and Canada. All heaters are available for use with either natural
or propane gas. The type of gas, the firing rate, and the electrical char-
acteristics are on the unit rating plate.
Sizes 45, 60 and 75
are certified to
CSA Requirement
10-96 for
RESIDENTIAL
INSTALLATION
®