line and duct burners
AHMA-DB
Forced draft version of the Eclipse AH-MA burner designed to work at the core of the airflow to be heated.
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Overview
The AH-MA DualBlock, or AHMA-DB, is a forced draft version of the AH-MA burner with a modular design. The burner comes equipped with a flange to mount it to the wall or to a plate ready for insertion into the unit machine or duct. The fan can be mounted on the interior of the furnace/duct or on the exterior. This burner is typically applied to ducts in depression or lightly over-pressured.
Features & Benefits:
Features & Benefits:
- Capacity range: 500,000 to 28,000,000 Btu/h (147 to 8200 kW)
- Fuels: natural gas, propane, butane
- Turndown: greater than 20:1
- Designed for work at the core of the air flow to be heated - inside or outside the duct
- Extremely clean combustion with complete independence from the air flow to be heated permitting it to be used in all types of furnaces
Specifications
Air & Combustion Air Specifications
- Air Filter
- Air filter with internal flow adjustment
- Air inlet with adjustment/protection grid
- Air Flow Switch
- Eclipse supports NFPA requirement to use an air pressure switch
- Provides signal when blower air pressure is insufficient
Pressure Specifications
- Valve Train Pressure
- Fuel pressure to ratio regulator inlet per Datasheet 163; valve train sized to provide specified pressure
Performance, Flow & Capacity
- Turndown Ratio
- Greater than 20:1 (max to min power)
Installation & Mounting Specifications
- Mounting Options
- External mounting on wall duct or internal mounting with fixing plate
Motor Specifications
- Motor Requirements
- 90 deg stroke, continuous or high/low modulating, reversible
- ≤2 rpm (≈30 s/90 deg ), ≥25 in‑lb (2.8 Nm) torque
Actuation, Valve & Motion Control Specifications
- Monitoring System
- Flame sensor + flame monitoring control; control must maintain spark for a fixed time during ignition
Air/Exhaust/Flue Gas Temperatures
- Maximum Air Supply Temperature
- ≤ 250 deg F (121 deg C)
Electrical Specifications
- Maintenance Interval
- Low-fire start recommended; if low fire is too low to ignite within code time, start at higher input, resize/relocate controls, or use spark-ignited pilot; pilot fuel flow must be interrupted after trial
Connections & Interfaces
- Gas Pipe Connections
- Left-hand or right-hand piping; BSP or NPT threaded connections
Control, Logic & Functional Behavior
- Functions
- Modular burner designed to work at the core of the airflow; extremely clean combustion; suitable for ducts, furnaces, ovens and dryers, including high humidity, low O2 and variable flow applications
- Control Method
- Motorized butterfly valve modulates fuel flow only; burner air side remains fixed
Fuel, Gas & Media Specifications
- Fuel Type
- Natural Gas, Propane, Butane; contact Eclipse for alternative fuels
Ignition, Flame & Supervision Specifications
- Flame Supervision
- Flame rod or UV scanner; must comply with applicable local codes and be compatible with the monitoring control
Product Design & Configuration
- Burner Style
- Straight sections, double T geometries, and cross sections
- Burner Design
- Modular burner with mixing in the head (DualBlock concept)
Combustion Air, Blower & Emissions Specifications
- Blower Options
- Integrated (mounted) or remote blower; 50 Hz IEC (CE) or 60 Hz NEMA (UL/CSA) motors
Applications & Compatibility
- Applications
- Furnaces, ovens, dryers, air make‑up systems with variable flow, humidity, or oxygen levels
- Heating of process air streams in ducts, ovens, dryers, and furnaces
Air & Combustion Air Specifications
- Air Filter
- Air filter with internal flow adjustment
- Air inlet with adjustment/protection grid
- Air Flow Switch
- Eclipse supports NFPA requirement to use an air pressure switch
- Provides signal when blower air pressure is insufficient
Pressure Specifications
- Valve Train Pressure
- Fuel pressure to ratio regulator inlet per Datasheet 163; valve train sized to provide specified pressure
Performance, Flow & Capacity
- Turndown Ratio
- Greater than 20:1 (max to min power)
Installation & Mounting Specifications
- Mounting Options
- External mounting on wall duct or internal mounting with fixing plate
Motor Specifications
- Motor Requirements
- 90 deg stroke, continuous or high/low modulating, reversible
- ≤2 rpm (≈30 s/90 deg ), ≥25 in‑lb (2.8 Nm) torque
Actuation, Valve & Motion Control Specifications
- Monitoring System
- Flame sensor + flame monitoring control; control must maintain spark for a fixed time during ignition
Air/Exhaust/Flue Gas Temperatures
- Maximum Air Supply Temperature
- ≤ 250 deg F (121 deg C)
Electrical Specifications
- Maintenance Interval
- Low-fire start recommended; if low fire is too low to ignite within code time, start at higher input, resize/relocate controls, or use spark-ignited pilot; pilot fuel flow must be interrupted after trial
Connections & Interfaces
- Gas Pipe Connections
- Left-hand or right-hand piping; BSP or NPT threaded connections
Control, Logic & Functional Behavior
- Functions
- Modular burner designed to work at the core of the airflow; extremely clean combustion; suitable for ducts, furnaces, ovens and dryers, including high humidity, low O2 and variable flow applications
- Control Method
- Motorized butterfly valve modulates fuel flow only; burner air side remains fixed
Fuel, Gas & Media Specifications
- Fuel Type
- Natural Gas, Propane, Butane; contact Eclipse for alternative fuels
Ignition, Flame & Supervision Specifications
- Flame Supervision
- Flame rod or UV scanner; must comply with applicable local codes and be compatible with the monitoring control
Product Design & Configuration
- Burner Style
- Straight sections, double T geometries, and cross sections
- Burner Design
- Modular burner with mixing in the head (DualBlock concept)
Combustion Air, Blower & Emissions Specifications
- Blower Options
- Integrated (mounted) or remote blower; 50 Hz IEC (CE) or 60 Hz NEMA (UL/CSA) motors
Applications & Compatibility
- Applications
- Furnaces, ovens, dryers, air make‑up systems with variable flow, humidity, or oxygen levels
- Heating of process air streams in ducts, ovens, dryers, and furnaces
- Air Filter : Air filter with internal flow adjustment|Air inlet with adjustment/protection grid
- Valve Train Pressure : Fuel pressure to ratio regulator inlet per Datasheet 163; valve train sized to provide specified pressure
- Turndown Ratio : Greater than 20:1 (max to min power)
- Mounting Options : External mounting on wall duct or internal mounting with fixing plate
- Motor Requirements : 90 deg stroke, continuous or high/low modulating, reversible|≤2 rpm (≈30 s/90 deg ), ≥25 in‑lb (2.8 Nm) torque
- Monitoring System : Flame sensor + flame monitoring control; control must maintain spark for a fixed time during ignition
- Maximum Air Supply Temperature : ≤ 250 deg F (121 deg C)
- Maintenance Interval : Low-fire start recommended; if low fire is too low to ignite within code time, start at higher input, resize/relocate controls, or use spark-ignited pilot; pilot fuel flow must be interrupted after trial
- Gas Pipe Connections : Left-hand or right-hand piping; BSP or NPT threaded connections
- Functions : Modular burner designed to work at the core of the airflow; extremely clean combustion; suitable for ducts, furnaces, ovens and dryers, including high humidity, low O2 and variable flow applications
- Fuel Type : Natural Gas, Propane, Butane; contact Eclipse for alternative fuels
- Flame Supervision : Flame rod or UV scanner; must comply with applicable local codes and be compatible with the monitoring control
- Control Method : Motorized butterfly valve modulates fuel flow only; burner air side remains fixed
- Burner Style : Straight sections, double T geometries, and cross sections
- Burner Design : Modular burner with mixing in the head (DualBlock concept)
- Blower Options : Integrated (mounted) or remote blower; 50 Hz IEC (CE) or 60 Hz NEMA (UL/CSA) motors
- Applications : Furnaces, ovens, dryers, air make‑up systems with variable flow, humidity, or oxygen levels|Heating of process air streams in ducts, ovens, dryers, and furnaces
- Air Flow Switch : Eclipse supports NFPA requirement to use an air pressure switch|Provides signal when blower air pressure is insufficient
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