The Flagro F-1000T Dual Fuel Construction Heater is a robust, unvented, and unattended gas-fired construction heater designed for temporary heating applications in commercial and industrial settings. It is certified for use in Canada and the U.S.A. as per Standard ANSI Z83.7 2000/CSA 2.14 2000 for Gas Fired Construction Heaters. This manual provides essential operating instructions, safety warnings, specifications, installation guidelines, and troubleshooting information to ensure safe and efficient operation.

Function Description

The F-1000T is primarily intended for the temporary heating of buildings under construction, alteration, repair, or during emergencies. It is a dual-fuel heater, capable of operating on either natural gas or propane, offering flexibility in fuel source depending on availability. The heater utilizes a direct spark ignition system and includes a thermostat for temperature control, allowing users to set the desired heat output. A fan assembly ensures efficient air circulation, distributing heat throughout the designated area. The unit is designed for unvented operation, meaning it discharges combustion products directly into the heated space, necessitating adequate ventilation.

Important Technical Specifications

Model: F-1000T
Input: 1,000,000 BTUH (British Thermal Units per Hour)
Fuel: Natural Gas or Propane
Inlet Pressure:
- Natural Gas: 7.0" W.C. (Water Column)
- Propane: 11" W.C.
Maximum Inlet Pressures:
- LP (Liquid Propane): 14.0 IN. WC.
- NG (Natural Gas): 14.0 IN. WC.
Minimum Inlet Pressures:
- LP: 11.0 IN. WC.
- NG: 7.0 IN. WC.
Ignition: Direct Spark Ignition, Thermostat Control
Air Circulation: 7000 cfm (cubic feet per minute)
Fuel Consumption:
- Propane: 46 lbs/hr
- Natural Gas: 952 cfh (cubic feet per hour)
Electrical Supply: 120V, 20 amps (motor requires 20 amps)
Certification: cULus listed, ANSI Z83.7 2000/CSA 2.14 2000 Gas Fired Construction Heaters Unvented/Unattended Type.

Usage Features

Safety Warnings: The manual emphasizes several critical safety warnings. Failure to comply can lead to death, serious bodily injury, and property loss due to fire, explosion, burns, asphyxiation, carbon monoxide poisoning, and/or electrical shock. Only persons who can understand and follow the instructions should use or service this heater. It is explicitly stated that the heater is not for home or recreational vehicle use.

Clearance to Combustibles: To prevent fire hazards, specific clearances to combustible materials must be maintained:

TOP: 4 ft
FRONT: 16 ft
SIDES: 2 ft
REAR: 2 ft The heater must also be located at least 10 ft (3m) from any propane gas cylinder and not directed toward any propane gas container within 20 ft (6m).

Ventilation: Adequate ventilation is crucial for unvented heaters. The manual specifies that 1 sq. in. of fresh air must be supplied for every 1000 BTUH of heat produced.

Dual Fuel Capability: A fuel selector valve on the heater's manifold allows switching between natural gas and propane. Users must ensure this valve is in the correct position for the fuel being used and not operate the heater with the valve in the incorrect position.

Electrical Grounding: The appliance is equipped with a three-prong (grounding) plug for protection against shock hazards and must be plugged directly into a properly grounded three-prong receptacle. An appropriate gauge extension cord must be used, as the motor requires 20 amps.

Start-Up Instructions:

Set the fuel selector valve according to the gas supply.
Connect the heater to the gas supply with an approved hose assembly.
Plug the electrical cord into a 20 amp supply.
Open all gas supply valves.
Depress the main switch to the "START" position; the fan will start, and the burner should ignite. Release the switch to the "RUN" position.
Set the thermostat to the desired temperature.
If the heater fails to ignite after 3 attempts, contact the supplier for service.

Shut-Down Procedure:

Close the main gas supply valve while the heater is operating.
Move the main switch to the "OFF" position.
Disconnect the heater from the gas supply.

Maintenance Features

Regular Inspections:

Every construction heater should be inspected before each use and at least annually by a qualified service person.
The hose assembly must be visually inspected before each use. If there is excessive abrasion, wear, or cuts, it must be replaced with a manufacturer-specified hose assembly.

Clearance and Cleanliness:

The appliance must be kept clear and free from combustible materials, gasoline, and other flammable vapors and liquids.
The flow of combustion and ventilation air must not be obstructed. The fan assembly, motor, and blade should be checked for proper operation.

Cleaning:

Compressed air should be used to keep components free of dust and dirt buildup.
Important: Do not use compressed air inside any piping or regulator components.

Piping and Connections:

Installation and servicing of piping must be performed by a qualified gas technician following local codes.
When loosening, tightening, or replacing pipe fittings, the complete fitting should be removed, and approved pipe dope applied to all male threads before reconnection.
After servicing, the valve train should be checked for leaks using a soap and water solution or an approved leak detector solution.

Troubleshooting: The manual includes a detailed troubleshooting analysis for common issues:

Heater will not light: Possible causes include an improperly set air switch (adjust sensitivity), blockage in copper inlet tubes (clean with high-pressure air), or a blocked rear of the heater (ensure unobstructed and proper clearances). Other electrical and gas supply issues are also covered, such as faulty switches, solenoids, spark plugs, and ignition boards.
Heater will not remain lit after start-up: Possible causes include the thermostat not calling for heat, a faulty flamerod wire (check for damage, replace if necessary), or a faulty flamerod (ensure secure connections, replace if necessary).
Electrical issues: All components and connections must be checked for a complete electrical circuit using a volt meter and the provided wiring diagram. Any point in the circuit where 120V is not achieved indicates a problem.
Ignition board issues: Check the ground wire, polarity of the extension cord, and replace if faulty.

Parts List: A comprehensive parts list is provided, including part numbers for components such as the motor, fan blade, regulators, valves, solenoids, burner, flame rod, igniter, switches, relays, ignition control boards, indicator lights, power cord, and wheels. This facilitates easy identification and ordering of replacement parts.

Flagro F-1000T - Page 11

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