Table of Contents
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Models FT 30, 45, and 60 are certified for residential and commercial/industrial installations.
Models FT 75-300 are certified for commercial/industrial installations.
Installation and Operation ........................................................... Paragraphs 1-20 ........... Pages 1-13
Check Installation and Start-Up ....................................................... Paragraph 21 ......... Pages 14-15
Service/Maintenance/Troubleshooting ...................................... Paragraphs 22-33 ......... Pages 16-20
Index
Burner Air Restrictor ........................... 13
Burner Orifices ................................... 17
Burner Removal .................................. 16
Burners ................................................ 13
Check Installation and Start-Up .......... 14
Circuit Board ....................................... 11
Circuit Board LED Codes ............. 11, 19
Clearances .............................................. 3
Combustion Air ..................................... 3
Combustion Air Proving Switch ......... 13
Condensation ......................................... 8
Confined Space ..................................... 3
Dimensions ........................................... 5
Downturn Nozzles (Option Kit) ............. 2
Electrical Supply and Connections ..... 11
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 build-
ing.
• Immediately call your gas supplier
from a neighbor's phone. Follow the
gas supplier's instructions.
• If you cannot reach your gas sup-
plier, call your fire department.
WARNING: Improper installation,
adjustment, alteration, service, or
maintenance can cause property damage,
injury, or death. Read the installation,
operation, and maintenance instructions
thoroughly before installing or servicing
this equipment.
®
Table of Contents
Page No.
Index
Fan ...................................................... 17
Fan Motor ........................................... 11
Flame Rollout Switch .......................... 18
Gas Piping and Pressures ...................... 9
Gas Valve ............................................ 13
General .................................................. 1
Hazard Intensity Levels ......................... 1
Heat Exchanger ................................... 17
Pressure Switches .................... 2, 11
High Altitude Operation ........................ 2
Ignition System ............................. 13, 17
Installation Codes ................................. 2
Left Side Controls .................................. 4
REFERENCE:
Gas-Fired, Power-Vented
APPLIES TO:
Page No.
Replacement Parts, Form RZ-NA-P-FT/SFT
Gas Conversion Form, RZ-NA-I-FT/SFT-GC
FOR YOUR SAFETY
Do not store or use gasoline or other flammable vapors
and liquids in the vicinity of this or any other appliance.
HAZARD INTENSITY LEVELS
1. DANGER: Failure to comply will result in severe personal injury or
death and/or property damage.
2. WARNING: Failure to comply could result in severe personal injury or
death and/or property damage.
3. CAUTION: Failure to comply could result in minor personal injury
and/or property damage.
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 au-
thorities having jurisdiction. The instructions in this
manual apply to the unit heater model shown below.
Model
Type
Indoor, Susp ended
FT
Unit Heater
IMPORTANT: If your heater Model No. has a suffix -LN or -CV, do not use the
venting instructions in this manual. Follow the instructions in Form RZ-433-CV/
LN to install a Model FT30-CV, FT45-CV, or FT45-LN heater.
Form RZ-NA-I-FT, Mfg No. 173473 Rev 8, Page 1
Model FT
Unit Heaters
INSTALLATION FORM RZ-NA-I-FT
Obsoletes Form RGM 433 (Version G)
Installation/Operation/Service
Index
Limit Control ............................... 18
Location (Heater) ........................... 3
Louvers, Vertical (Option Kit) ....... 2
Maintenance ................................. 16
Service ......................................... 16
Suspending ..................................... 4
Thermostat ................................... 11
Troubleshooting ........................... 19
Uncrating and Preparation ............. 2
Vent System ................................. 18
Venter Motor ................................ 17
Venting ........................................... 6
Warranty ......................................... 2
Wiring Diagrams .......................... 12
Fuel
Vent
Air Delivery
Gas-Fired
Power
Propeller Fan
Page No.
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Related Manuals for Thomas & Betts RENZOR FT 30
Summary of Contents for Thomas & Betts RENZOR FT 30
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Page 1: Table Of Contents
Model FT Gas-Fired, Power-Vented Unit Heaters INSTALLATION FORM RZ-NA-I-FT ® Obsoletes Form RGM 433 (Version G) APPLIES TO: Installation/Operation/Service Models FT 30, 45, and 60 are certified for residential and commercial/industrial installations. Models FT 75-300 are certified for commercial/industrial installations. Table of Contents Installation and Operation ............ -
Page 2: Downturn Nozzles (Option Kit)
General (Cont'd) 2. Warranty Model FT heaters are design-certified by the Canadian Standards As- Refer to the limited warranty information on the Warranty Card in the sociation (CSA) to ANSI Z83.8a and CGA 2.6a for industrial/com- "Owner's Envelope". mercial installations in the United States and Canada. Models FT 30, Warranty is void if ... -
Page 3: Clearances
6. Combustion Air Requirements for Figure 1 - Pressure Switch Location (above 6000 ft, replace with a pressure switch set for high altitude a Heater Located in a Confined operation) Pressure Switch Space Do not install a unit in a confined space without providing wall openings leading to and from the space. -
Page 4: Left Side Controls
8. Left Side Controls When the heater is lifted for suspension, support the bottom of the heater with plywood or other appropriately placed material. If the bottom is not supported, All units are factory built with controls on the right side (as damage could occur. -
Page 5: Dimensions
10. Dimensions Model FT Dimensions (inches and mm) Figure 4 NOTE: Composite drawings are not proportional for all sizes. Right Side View All Sizes Standard control side is Front View the right side; units may All Sizes be converted to left side of Motor controls in the field (See Paragraph 8.) -
Page 6: Venting
11. Venting DANGER: Check the Model No. on the rating plate. If there is a suffix -LN or -CV, DO NOT USE these venting instructions. Model FT heaters with either of these suffixes have special venting requirements; follow the instructions in Form RZ 433-CV/LN. WARNING: Units installed in multiples require individual vent pipe runs and vent caps. - Page 7 3. Vent Pipe Diameter and Vent Length Comply with all requirements that apply. Use only one diameter of vent pipe on an installation. Minimum vent length is 5 feet. Maximum Permissible Vent Lengths Vent Pipe Maximum Vent Equivalent IMPORTANT Vent Length NOTES: Diameter Length Straight Length*...
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Page 8: Condensation
11. Venting Requirements (cont'd) 4. Vent System Joints - Vent system joints depend on the type of pipe 5. Vent System Support - Lateral runs should be supported every six being used (See "Vent Pipe" requirements, No.1). feet using a non-combustible material, such as strap steel or chain. Do not rely on the heater for support of either horizontal or vertical vent •... -
Page 9: Gas Piping And Pressures
Figure 7B - Horizontal Vent Terminals Single-Wall Vent Run Single-Wall Vent Run and Double-Wall Terminal End and Single-Wall Terminal End Roof or Building Overhang Roof or Building Overhang 12” 12” (305mm) (305mm) minimum minimum 6’ (2M) 6’ (2M) minimum minimum Wall Wall Note position of... - Page 10 12. Gas Pressures (cont'd) Sizing a Gas Capacity of Piping Cubic Feet per Hour based on 0.3" w.c. Pressure Drop Supply Line Specific Gravity for Natural Gas -- 0.6 (Natural Gas -- 1000 BTU/Cubic Ft) Specific Gravity for Propane Gas -- 1.6 (Propane Gas -- 2550 BTU/Cubic Ft) Length Diameter of Pipe 1/2"...
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Page 11: Circuit Board
3. With the manual valve positioned to prevent flow to the main burn- Check the rating plate on the heater for the supply voltage and current ers, connect a manometer to the 1/8” pipe outlet pressure tap in the requirements. A dedicated line voltage supply with fused disconnect valve. -
Page 12: Wiring Diagrams
TYPICAL WIRING DIAGRAM Fan-Type, Power-Vented Model with Direct Spark Ignition, Single-Stage Heating, Natural or Propane Gas Figure 10 - (COM) (HOT) 115/1/60 Wiring Diagram (SEE NOTE 6) #147203 for Model FT, DSI CONTROL VENTER MOTOR Sizes 30 - 300 LINE VAC HOT BLWR AUX FAN MOTOR... -
Page 13: Burner Air Restrictor
16. Combustion Air Proving 18. Ignition System Switch This heater is equipped with a direct spark integrated control system. The system monitors the safety devices and controls the operation of The combustion air proving switch is a pressure sensitive switch that the fan and venter motors and the gas valve between heat cycles. -
Page 14: Check Installation And Start-Up
21. Check Installation & Start-up Check the installation prior to start-up: Operating Instructions and Operating Check suspension. Unit must be secure and level. Sequence Check clearances from combustibles. Requirements are shown in 1. Set thermostat at lowest setting. Paragraph 6. 2. - Page 15 Check installation after start-up: Vent System Testing Procedure 1. Seal any unused openings in the venting system. 2. Inspect the venting system for proper size and horizontal pitch, as required in the National Fuel Gas Code, ANSI Z223.1 or CAN/CGA B149.1and B149.2, Installation Code for Gas Burning Appliances and Equip- ment, and this manual.
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Page 16: Burner Removal
MAINTENANCE AND SERVICE WARNING: Excessive dirt buildup on and inside the burner ports WARNING: If you turn off the power could cause fuel gas to spill out of the back of the burner tube causing supply, turn off the gas. See Hazard gas odor inside the building. -
Page 17: Burner Orifices
Excessive dirt buildup on and inside the ports on the burner could CAUTION: Eye protection is recommended. cause fuel gas to spill out of the back of the burner tube. Fuel gas The inner surfaces of the heat exchanger can be reached for cleaning spilling out of the back of the burner tube will cause gas odor inside with the burner and venter assemblies removed (See Figure 12 and the building, and if not corrected, could eventually cause a fire/explo-... -
Page 18: Flame Rollout Switch
27. Venter Motor Remove dirt and grease from the motor housing. Power venter motor is permanently lubricated. The integrated circuit board controls and monitors operation of the venter motor. If the contacts fail to close the venter motor will not run. If the contacts fail to open, the venter motor will not shut off, prevent- ing the combustion air pressure switch from opening. -
Page 19: Troubleshooting
33. Troubleshooting Check the Circuit Board - The integrated circuit Circuit Board LED Codes board monitors the operation of the heater and in- Slow Flash ..Normal Operation, No call for heat cludes an LED signal that indicates normal opera- Fast Flash .. - Page 20 33. Troubleshooting (cont'd) PRO BLEM PRO BABLE CAUS E REMEDY 1. Incorrect manifold p ressure or orifices. 1. Check manifold p ressure (See Paragrap h 12). No heat (Heater 2. Cy cling on limit control. 2. Check air throughp ut. O perating) 3.
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