Trane Direct Fired Make-Up Air Detailliste PDF herunterladen (Seite 2)

Introduction

Why use Trane Makeup Air Units…

Trane’s innovative Direct Fired gas heating systems add warm, fresh and clean air to your work

environment for about 20 precent less than the operation and maintenance costs of indirect gas

heat.

• Heats Without Complications: The Direct Fired gas heating system heats efficiently and cost-

effectively using no heat exchanger.

• Replaces Indoor Air: The Direct Fired gas heating system replaces indoor air that can become

chemical laden in an industrial process or commercial cooling application.

• Provides Ventilation: Fresh air is available simply by turning off the heating section.

• Cleans and Tempers Incoming Air: The optional filter bank removes airborne particles, and

cleaned air is heated to create a more refreshing and comfortable indoor environment.

• Trane offers two styles of Direct Fired gas heating systems:

– Indoor units (DFIA)

– Large outdoor units (DFOA)

What Is Make-Up Air?

Make-up air is an outside air supply that is brought in to relieve “air starvation.” Without make-up

air, a building is under a “negative” condition and the following will occur:

• Backdrafts in natural flues, ventilators and stacks.

• Reduced air volume handled by the exhaust fans and subsequently inadequate removal of

contaminants.

• Dispersal of contaminants throughout the work area by high velocity cross-currents from

uncontrolled outside air sources.

• Uncomfortable and unhealthy working conditions.

• Pilot outages.

When Is It Required?

Make-up air is required whenever exhaust fans are used. This need for a building “air change”

arises when there are:

• Processes which generate contaminants in the form of noxious fumes or dust.

• Activities which create excessive heat or undesirable odors.

• Hazardous material storage areas.

• Ventilation requirements for a building’s inhabitants.

• State and local code requirements.

Why Use Make-Up Air Units?

Outside air should not be allowed to drift in through windows, door cracks and other openings,

creating a strain on the heating system. Outside air should be controlled, tempered and

coordinated with the exhaust by a make-up air unit. The latter is reliable, efficient and does not

disrupt building activities.

Why Use Direct Gas-Firing?

Maximum economy is realized with direct gas-firing because the incoming air is heated directly in

the burner chamber. This provides 100 percent efficiency (92 percent sensible, 8 percent latent)

while eliminating a heat exchanger or combustion chamber that could burn out or corrode.

Trane direct-fired units are factory tested, include the necessary controls for operating the system

and generally cost less than alternate systems.

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