The HELLFIRE 900 switch heater is recommended for clearing ice and snow from switches with no longer than 40 ft of moving rail from heel to point of switch. It is rated with an output of 300,000 to 900,000 BTU/HR, on propane or natural gas.
Three standard duct system configurations are available, 131", 140" and 155" clearance.
The fan is direct driven at 3450 rpm, and delivers 2000 scfm.
FIRING SPECIFICATIONS
| Fuel |
PROPANE GAS |
NATURAL GAS |
| Input rating, BTU/hr |
300,000 - 900,000 |
300,000 - 900,000 |
| Manifold pressure, Inches of water |
2.5 - 8.0 |
3.0 - 16.0 |
| Inlet pressure, Psig |
5 - 20 |
5 - 20 |
ELECTRICAL SPECIFICATIONS
| Voltage Volts | Phase Running | current amps | Frequency Hz |
| 240 | 1 | 12.5 | 60 |
| 208 | 3 | 10.3 | 60 |
| 460 | 3 | 4.8 | 60 |
| 575 | 3 | 3.9 | 60 |
CONSTRUCTION
- 14 ga galvanized steel blower, intake and duct work
- Stainless steel combustion chamber / transition duct
- Direct drive centrifugal fan
- Match balanced motor and impeller sets to less than 0.2 ips pk-pk
CONTROLS
- Continuous pilot burner system.
- Thermostatically limited track duct nozzle outlet temperature, 340 - 380°F.
- Remote operation, requires a set of contacts rated for a minimum 120Vac, 0.5 amp.
- Remote run indication, provided by a set of normally open contacts rated at 8 amps resistive or 2 amps inductive, 240/120Vac or 24Vdc.
- Force off provided by a normally closed contact rated for a minimum of 120Vac, 0.5 amp.
- Programmable delay ON timer, 0 - 99 seconds, allows staggered start up of a series of heaters.
- Magnetic motor contactor.
- Motor equipped with thermal overload protection.
- Fused tank valve terminals on 240V single phase and 208V three phase only.
GAS CONVERSION
- Heaters are factory set for use with propane gas.
- To convert to natural gas change the gas pressure regulator spring with one supplied separately and adjust within specifications detailed above. Affix separate gas type plate supplied.
- Reverse procedure to change back to original gas.
GAS SUPPLY
- Allowable nominal supply pressure is 5 to 20 psi, with no more than 20% pressure drop with all connected loads operating.
- Recommended supply gas pressure is 5 psi.
- Inlet gas fitting is 1" NPT female.
TERMINAL BLOCK WIRE SIZES
- Power, #14 to #2 AWG Copper
- Control, 1/4" AAR terminal posts
SAFETY FEATURES
- Air pressure (flow) switch: Ignition is disabled until adequate air pressure is developed.
- High temperature limited: In the event of thermostat failure and nozzle temperatures exceeding 420°F, the heater is shut off to avoid tie damage. Heater operation is restored by manual reset.
- Loss of flame: The Ignition Module closes the gas valve if after the trial for ignition period of 10 seconds no flame is sensed, or if flame detection is lost for more than 1 second during normal operation.
OPTIONS
See Ordering Guides
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