Catalog

DETAILS

• Complete range of sizes from 10″ to 36″.
• Full AMCA Class 1 Operation.
• Non-overloading backward inclined (BI) welded wheels.
• Aluminum wheel – (AMCA type B classification for spark resistant construction) – available as an option.
• Discharge position can be field rotated to any of 8 discharge positions.
• Counter clock wise rotation is standard. Clock wise available.
• Outlet flanges on models BI-24 to BI-36.
• Temperature Ratings – without a heat slinger 250º F with a heat slinger, steel wheel 400º F, aluminum wheel 300º F.
• Motor access from 3 sides.
• Sloped motor base for ease of motor installation.
• Vented motor and drive compartment cover, with handles, for safety & weather protection.
• 16 gauge or heavier blower housing.
• Heavy duty pillow block ball bearings.

ACCESSORIES

• V-Cap
• Bolted Clean Out Door
• Heat Slinger
• Vibration Isolators
• Shaft Seal
• Corrosion Resistant Coating
• Aluminum Wheel
• Backdraft Dampers
• Inlet & Outlet Screens
• 2″ Drain Fitting

Applications:

• An Inline make-up air solution for cases where a rooftop curb mounted solution is not available.
• As an air moving module for systems built up with other components such as heating/cooling coils.
• Noise sensitive areas – the low rpm forward curved wheel typically radiates less vibration than higher rpm backward inclined wheel solutions.
• When the application requires an air mover in a duct system located in a ceiling space.
• Redistribution or recirculation of air in a work space.
• Interlocked with entry doors to prevent entry of cold outdoor air into retail sales space and thus greets customers with warmth.
• Bathroom/ rest room exhaust – one duct blower serving multiple intakes.
• Industries Served: Commercial HVAC, Ventilation, Heating, Cooling, Construction.

Features:

• Wheel Diameters: 7” through 20”.
• CFM: Approximately 500 to 12,500 CFM in a single blower (twins available).
• Static Pressure: Usage to about 3” static pressure is common, although allowable range is higher.
• Constructed from cold rolled steel, with green baked on powder coat. The outdoor unit uses protective galvaneal steel under the powder coat.
• Forward Curved blowers operate at low RPM for low noise levels.
• Heavy duty ball bearings suitable for -65º F to +250º F.
• Keywayed shafts both ends for clockwise or counter clockwise rotation.
• Saddle type motor mounting platform provides extended belt tension adjustment range on all models.
• As part of an HVAC system Delhi Duct Blowers will not “surge”, “hunt”, or “stall”.
• The variable pitch motor pulley permits field adjustment (typically + or – 15%) to match air delivery needs.
• For the quietest operational needs we offer optional internal spring isolation of the blower/motor from the housing thus greatly reducing radiated cabinet noise.
• Twin units (two duct blowers on a common shaft) offer a wide but not tall solution for situations where vertical space is limited.
• Quiet forward curved blowers operate at ½ the rpm of other inline solutions.
• An outdoor series, 9200, is available.

Accessories

• Filter sections.
• Intake Hoods.
• External Vibration Isolator Outdoor Spring.
• External Vibration Isolator Spring.
• Hot Water Coils.
• Chilled Water Coils.

MAIN TECHNICAL SPECIFICATION

• Mode: DD-FA
• Air Volume: 2 – 24,500 cfm
• Maximum SP: 3.5″ wg. @ standard air density

FEATURES & BENEFITS

• A wide variety of motors are available to meet specific application needs.
• Heavy duty construction, durable and weather resistant.
• Non-overloading backward inclined wheels, blades and inlets fabricated from aluminum.
• Wall mount applications, units up to 24″ nominal wheel can be wall mounted.
• Forced fresh air through the motor compartment cools motor and ensures long motor life.
• Quick release latches allow for easy access to motor compartment on 18″ thru 36″ units
• Standard bird screen.
• Variable pitch motor pulley allows for field adjustment and system balancing.
• High efficiency combined with low tip speeds result in quiet operation.
• Standard emergency disconnect switch.

OPTIONS

• Gravity Damper
• Motorized Damper
• Wall Mount Sleeve
• Roof Curb
• Extra Set of V-Belts

MAIN TECHNICAL SPECIFICATION

• Mode: DR-HFA
• Air Volume: 1 – 25,000 cfm
• Maximum SP: 4″ wg. @ standard air density

FEATURES & BENEFITS

• Spun aluminum housing for rust-free, weather resistant durability.
• Standard bird screen.
• Non overloading backward inclined wheels, blades and inlets fabricated from aluminum.
• All sizes can be wall mounted.
• Wire conduit to provide a clear channel for electrical connections.
• Safety Disconnect.
• Variable speed control.

OPTIONS

• Gravity Damper
• Motorized Damper
• Wall Mount Sleeve
• Roof Curb

MAIN TECHNICAL SPECIFICATION

• Mode: DU-HFA
• Air Volume: 2 – 24,500 cfm
• Maximum SP: 3.5″ wg. @ standard air density

FEATURES & BENEFITS

• Completely enclosed drive compartment protects motor from airborne contaminants
• Forced fresh air through the motor compartment cools motor and ensures long motor life
• Variable Speed Control on Single Phase Units Only. (VFDs required to adjust speed for 3 phase versions)
• Non-overloading backward inclined wheels, blades and inlets fabricated from aluminum
• Units up to 24″ nominal wheel can be wall mounted
• Quick release latches allow for easy access to motor compartment. (Size 12 & larger)
• Standard emergency disconnect switch (Size 12 & larger)

OPTIONS

• Gravity Damper. (UL705 Only)
• Motorized Damper. (UL705 Only)
• Wall Mount Sleeve.
• Roof Curb. (Vented and Non-Vented)
• Grease Collection Box. (Size 12 & larger)
• Bird Screen. (UL705 Only)
• Base Hinging Kit or Hinged Sub Base. (for NFPA96 compliance)
• Combination package that includes a supply fan mounted on the same roof curb.

MAIN TECHNICAL SPECIFICATION

• Mode: NCA-FA
• Air Volume: 2 – 24,500 cfm
• Maximum SP: 3.5″ wg. @ standard air density

FEATURES & BENEFITS

• A wide variety of motors are available to meet specific application needs.
• Heavy duty construction, durable and weather resistant.
• Non-overloading backward inclined wheels, blades and inlets fabricated from aluminum.
• Wall mount applications, units up to 24″ nominal wheel can be wall mounted.
• Forced fresh air through the motor compartment cools motor and ensures long motor life.
• Quick release latches allow for easy access to motor compartment.
• Variable pitch motor pulley allows for field adjustment and system balancing.
• High efficiency combined with low tip speeds result in quiet operation.
• Standard emergency disconnect switch.

OPTIONS

• Gravity Damper. (UL 705 Only)
• Motorized Damper. (UL 705 Only)
• Wall Mount Sleeve.
• Roof Curb. (Vented & Non-Vented)
• Grease Collection Box.
• Bird Screen. (UL 705 Only)
• Base Hinging Kit or Hinged Sub Base. (for NFPA96 compliance)
• Extra Set of V-Belts
• Combination package that includes a supply fan mounted on the same roof curb.

MAIN TECHNICAL SPECIFICATION

• Mode: A1-D
• Air Volume: 1000 – 21,000 cfm cfm
• Maximum SP: 3″ wg. @ standard air density

FEATURES & BENEFITS

• G90 galvanized construction
• Easy access doors
• Lifting points
• Pre-wired, pre-piped controls
• Horizontal or down discharge
• Vibration isolation
• High efficiency motors
• Adjustable drive sheaves
• Fully insulated casing
• Stainless steel burner
• 120 volt control transformer with single point electrical connection
• Redundant gas valves
• Intermittent spark pilot with timed safety lockout
• Electronic flame modulation
• High temperature limit switch
• Airflow proving switch
• Economizer inlet thermostat
• Motor starter
• Disconnect switch
• Burner observation port

Options

• Electrical Cabinet LED Lights
• Propane Fuel Application
• Room Override Thermostat
• Motorized Intake Damper
• Remote control panel including summer/winter switch and operating lights
• Freeze Stat with Bypass Timer
• Hi/Low Gas Pressure Switches
• Room Modulating Thermostat
• High Gas Pressure Regulator
• Convenience Outlet
• DX Cooling Coils
• Evaporative Cooler Intake
• V-Bank Filter Intake
• Sloped Filter Intake
• Auxiliary Starters
• Inlet Gas Pressure Gauge
• Indoor Hanging Cradle
• VAV Packages
• Roof Curbs
• Clogged Filter Switch
• Cooling Thermostat and Interlock
• Extra Set of V-Belts
• DDC Control capability for BACnet MS/TP, LonWorks, Johnson N2, and Modbus Protocol
• Z83.18 Recirculating Configuration

MAIN TECHNICAL SPECIFICATION

• Mode: A1-D
• Air Volume: 350 – 2,460 cfm cfm
• Maximum SP: 0.5″ wg. @ standard air density

FEATURES & BENEFITS

• Emergency disconnect switch.
• Spun aluminum housing for rust free weather resistant durability.
• Propellers constructed with die formed blades riveted to a steel hub.
• Can be roof or wall mounted.
• Standard bird screen.
• Wire conduit to provide a clear channel for electrical connections.

Options

• Motorized Damper.
• Wall Mount Sleave.
• Roof Curb.

MAIN TECHNICAL SPECIFICATION

• Single Phase
• Three Phase
• Multiple HP

MAIN TECHNICAL SPECIFICATION

• Single Phase
• Three Phase
• Multiple HP

MAIN TECHNICAL SPECIFICATION

• Single Phase
• Three Phase
• Multiple HP