CaptiveAire A-IBT User Manual

Features & Benefits

Bent Tube In-Shot Style Furnace with Type
409 Stainless Steel Heat Exchanger
80% Constant Efficiency over Entire Gas
Firing Range
6:1 Turndown per Furnace, 28:1 Max
Full Electronic Vernier-type Modulation
Forced High Fire Start
Variable Speed Power-vent Motor
Discharge, Space, or Building Automation
System (BAS) Temperature Control
Isolated and Insulated Electrical Controls
Vestibule
Natural Gas or Liquid Propane Applications
Inlet and Manifold Gas Pressure Indicating
Gauges
Electronic Push Button adjustment for the

Options

5:1 Turndown for Propane(LP) per Furnace.
23:1 Max
Up Discharge
Motorized Intake Damper.
Remote Conrol Panel
Hi and Low Gas Pressure Switch
Mixing Box
Variable Air Volume (VAV) Conrols
Double Wall Construction
Blower on Delay (Heat Exchanger Pre­Heat)
Freeze-Stat Option
Fire-Stat Option
Convenience Outlet
Extended Drop
Single Point Electrical Connection

Modular Indirect-Fired Bent Tube Heater

Providing clean and tempered makeup air to meet your application needs. The push­through design ensures that combustion fumes will not enter the fresh air stream.

Modulating Gas Valve
High Temperature Limit Switch
Flame Rollout Switch with Manual Reset
LED Indicators for Troubleshooting
Economizer Inlet Air Thermostat

Control Cabinet Heater
Dirty Filter Airflow Switch
Auxiliary Starters
Roof Curbs
Indoor Hanging Cradle
DDC Control capability for BACnet MS/TP,
LonWorks, Johnson N2, and Modbus
Protocol

Additional Features

The Modular Indirect Fired Bent Tube Heater is
des igned to deliver clean air into an indoor
environm ent. Units are designed for indoor or
outdoor ins tallation, and can us e either Natural or
LP gas . the standard unit includes a blower module
and the IBT heater module that is approved in the
United States and Canada. the unit is listed to the
ANSI Z83.8-2006 and CSA 2.6-2006 standards .
Each furnace has a 6:1 Turndown Ratio and a
maximum Turndown of 28:1 for the entire unit,
depending on total required BTU Capacity and
num ber of furnaces in the unit.

Every unit is programmed to start in high fire mode to ensure cons istent light-off and is equipped with an electronic,
Vernier-type fully-modulating control system . The duct furnaces are all type-409 stainless steel, and certified by the
American Gas Association and approved by the Canadian Gas Association. Each model utilizes a single modulating
stage, and between zero and three additional ON/OFF stages depending on the required heat output. In addition, the
speed of its power-vent blower on the single modulation furnace is varied as the gas flow changes; thereby maintaining a
cons tant 80% com bustion efficiency over the entire gas-firing range of the unit.

Com bination packages that include both exhaust and s upply fans mounted on a single roof curb are als o available;
pleas e contact your sales representative for more information.

Certifications

The A-IBT Model has been certified by ITS. this certification mark indicates that the product has been tested to and has met
the minimum requirements of a widely recognized (cons ens us) U.S. products safety standard, that the manufacturing s ite
has been audited, and that the applicant has agreed to a program of periodic factory follow-up ins pections to verify
continued perform ance.

Model A-IBT is ETL Listed under file number 3137380COL-002 and com plies with ANSI Z83.8-2006 and CSA 2.6-2006
Standards .