®
Combat IDF-Series
Indirect-Fired Heating, Cooling and Ventilation Systems
■ Discharge air free of combustion by-products.
■ High efficiency due to three or four pass heat
exchanger design.
■ Longer part longevity: Motors, belts and bearings
are placed out of the airstream.
■ Rugged, heavy-duty construction: Unit cabinet
is supported by welded steel frame. Casing is
finish-coated to help protect against corrosion.
Combat
■ Modular design allows for custom
configurations to meet customers' needs.
■ Evaporative and mechanical cooling
packages available.
1.800.828.7450
™
Quality in Any Language
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®
Combat by Roberts-Gordon IDF-Series Features
Reliable, Efficient System Operation Provided by:
Other IDF-Series Options:
• Double-width, double-inlet, forward-curved Class I,
AMCA rated centrifugal fan.
• Natural gas, propane gas or oil burners available.
• Roof curbs and vertical stands simplify mounting.
• System that does not contaminate heated air with
combustion by-products.
• Fresh air hood with birdscreen helps protect against
water entrainment.
• Operation of fan only in warm weather to enjoy free
ventilation cooling.
• Full-floating, stainless steel primary heat exchanger.
• V-bank filter section with disposable or cleanable
filters for longer equipment life of internal
components.
• Multiple blowers on tubular steel blower shafts (on
most models).
• Motorized two-position inlet or discharge damper
for exfiltration control.
• Mounting and wiring of all necessary operating
starters, relays, switches, safety controls and fuses.
• Gas trains approved to FM, IRI, or other special code
requirements.
• Variable pitch drive pulley (up through 10 hp).
• ODP motors with adjustable motor mounts.
• Insulated and/or weatherized sections available for
outdoor units.
IDF-Series Controls’ Options:
Long Lasting Construction Provided by:
• Remote Station with room or discharge thermostat
for easy operation and remote temperature
adjustment.
• Rugged angle steel base frame on every unit section
to withstand the rigors of shipping and handling.
• Fabricated sheet panels that virtually eliminate
rattling or rumbling.
• UL listed.
• Audible alarm for flame failure.
• Clogged filter indicator.
• Service Receptacle.
• Extra long life, self-aligning bearings sized for
industrial duty.
• White painted finish.
• Double-wall heat exchanger module.
• Unit-mounted on/off toggle switch.
Ease of Maintenance Provided by:
• Modular designed sections.
• Convenient access to heat exchangers and blower
module for field service.
• Optional service platforms on upright units.
®
Combat by Roberts-Gordon IDF-Series Optional Cooling Packages
Evaporative Cooling
COMBAT® by Roberts-Gordon IDF-Series evaporative cooling system is an economical cooling solution. It requires no air-
cooled condenser, no chiller or cooling tower, no chilled water pumps or distribution piping/insulation, no major motor control
center or electrical gear. Operating costs are a fraction of similar-capacity mechanical refrigeration systems.
Evaporative cooling works when warm air passes over specially treated wetted media. The heat passes from the air to the
wetted media, causing the water to evaporate and inside air to cool.
Mechanical Cooling
For situations requiring temperature and humidity levels lower than the performance parameters available with outdoor air
alone or with evaporative cooling, COMBAT® by Roberts-Gordon IDF-Series offer a broad range of cooling options.
Cooling options can be added by simply installing coil sections equipped with the appropriate cooling coils and a condensing
unit or chiller. The versatility afforded by the coil section enables you to utilize DX refrigerant, chilled water or other types of
cooling coils in your system.
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Discharge Options
Horizontal Unit/Horizontal Discharge
Upright Unit/Top Left Discharge
Upright Unit/Bottom Left Discharge
OA/RA
DA
DA
OA/RA
DA
OA/RA
Horizontal Unit/Bottom Discharge
Upright Unit/Top Right Discharge
Upright Unit/Bottom Right Discharge
OA/RA
DA
OA/RA
DA
DA
OA/RA
Horizontal Unit/Top Discharge
Upright Unit/Top Discharge
Upright Unit/Bottom Discharge
DA
OA/RA
DA
OA/RA
OA/RA
DA
LEGEND
OA = Outside Air
DA = Discharge Air
RA = Return Air
Installation Code and Annual Inspections:
All installations and service of ROBERTS GORDON® products must be performed by a contractor qualified in the installation and
service of products sold and supplied by Roberts-Gordon and conform to all requirements set forth in the ROBERTS GORDON®
manuals and all applicable governmental authorities pertaining to the installation, service and operation of the equipment. To help
facilitate optimum performance and safety, Roberts-Gordon recommends that a qualified contractor annually inspect your ROBERTS
GORDON® products and perform service where necessary, using only replacement parts sold and supplied by Roberts Gordon.
Further Information: Applications, engineering and detailed guidance on systems design, installation and product performance is
available through ROBERTS GORDON® representatives. Please contact us for any further information you may require, including the
Installation, Operation and Service Manual.
This product is not for residential use.
This document is intended to assist licensed professionals in the exercise of their professional judgement.
Roberts-Gordon, LLC
1250 William Street
P.O. Box 44
Buffalo, NY 14240-0044 USA
Telephone: 716.852.4400
Fax: 716.852.0854
European Office:
Roberts Gordon Europe Limited
Telephone: +44(0) 1902 494425
Fax: +44(0) 1902 403200
Toll Free: 800.828.7450
© 2007 Roberts-Gordon, LLC
All rights reserved. No part of this work covered by the copyrights herein may be reproduced or copied in any form or by any means
– graphic, electronic, or mechanical, including photocopying, recording, taping, or information storage and retrieval systems –
without written permission of Roberts-Gordon, LLC.
Printed in U.S.A.
CIDFBNA
5M 0207 Rev A
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