User Guide

ManualsBrandsModine ManualsHeating SuppliesIHR High Intensity Gas Fired Infrared Unit Heater - 90,000 BTU (115V, NG)

9-200.7

September, 2016

DESIGN AND ENGINEERING GUIDE

high and low intensity gas-fired infrared heaters

Introduction

Modine gas-fired infrared heaters for comfort heating

applications can be used alone or in combination with other

Modine heating equipment such as gas-fired unit heaters,

make-up air units, etc. to provide superior comfort heating

solutions. This guide will provide a basic understanding of the

principles of using infrared heat.

TABLE OF CONTENTS PAGE

Introduction……………………………………………

Typical Applications………..………………………..

Why Use Infrared....................................................

SI (Metric) Conversion Factors…………….………

Types of Heat Transfer………..…….…………...….

Types of Infrared Heaters………….………….…….

Understanding Heat Spread/Distribution….……..

Infrared Heater Selection Procedure and Data

Clearance to Combustibles………...………………

Application – Spot Heating…………………………

Application – Partial Building/Area Heating………

Application – Total Building Heating………………

Additional Considerations

Mounting Height/Building Obstructions…………..

Low-Intensity Tube Length Considerations….…..

Availability of Utilities (Gas and Electric)……..…..

Venting/Ventilation………………………………….

Multiple Low Voltage Heaters/Single Stat…….….

Humidistat……………………………………………

Thermostat Location………………………………..

Contaminated Atmospheres…………………….....

Negative Pressure in Space…………………….....

Outdoor Applications……………………………….

Duration of Operation……………………………....

Low-Intensity Tube System Expansion…………..

Accessories………………………………………….

Typical Selection Considerations Summary….....

Performance Data

(Total Building Heating Only)……....

Improper installation, adjustment, alteration, service,

or maintenance can cause property damage, injury,

or death, and could cause exposure to substances

which have been determined by various state

agencies to cause cancer, birth defects, or other

reproductive harm. Read the installation, operating

and maintenance instructions thoroughly before

installing or servicing this equipment.

Typical Applications

The following are typical examples of buildings that can benefit

from infrared heating:



Manufacturing facilities

 Vehicle repair facilities

 Loading docks

 Aircraft hangars

 Indoor tennis courts

 Car washes

 Golf driving ranges

 Covered walkways

 Fire stations

 Stadium seating areas

 Vestibules

Why Use Infrared?

 Significant energy cost reduction potential in spot heating

applications. Conventional warm air heating systems

must warm the air and move it across the people to be

heated. If just a few workers are in a small area of a large

open building, this would require heating large volumes of

air to accomplish a suitable comfort level. However,

infrared heaters in that area would heat only objects,

including those workers.

 Infrared installations may actually use lower thermostat

settings as the radiant heat reaches the worker more

effectively than forced air applications.

 There is no air mover, reducing electricity costs.

 There is better worker comfort, since there are no

uncomfortable drafts or annoying fan or blower noise.

 Temperature recovery is quick if cold air is introduced

from open doors or windows. A forced air heater must

heat larger volumes of cold air before occupants feel

warm. However, an infrared heater supplies immediate

heat to the workers and objects in the space.

 The ability to control heating in zones is very easy with

infrared heaters because infrared is well-suited for

heating small areas. This would be difficult and inefficient

with forced air heaters.

SI Conversion

Convert

Multiply By

Obtain

Convert

Multiply

Obtain

"W.C. 0.249 kPa feet 0.305 m

°F (°F-32)x5/9 °C Gal/Hr. 0.00379 m

/hr

Btu 1.06 kJ Gal/Hr. 3.79 l/hr

Btu/ft

37.3 kJ/m

gallons 3.79 l

Btu/hr 0.000293 kW HP 746 W

/hr 0.000472 m

/min inches 25.4 mm

/hr 0.00000787 m

/s pound 0.454 kg

/min 0.0283 m

/min psig 6.89 kPa

/min 0.000472 m

/s psig 27.7 "W.C.

Summary of content (12 pages)

PAGE 1
9-200.7 September, 2016 DESIGN AND ENGINEERING GUIDE high and low intensity gas-fired infrared heaters Introduction Typical Applications Modine gas-fired infrared heaters for comfort heating applications can be used alone or in combination with other Modine heating equipment such as gas-fired unit heaters, make-up air units, etc. to provide superior comfort heating solutions. This guide will provide a basic understanding of the principles of using infrared heat.
PAGE 2
Heat Transfer and Infrared Heater Basics Types of Heat Transfer Types of Infrared Heaters Infrared heaters primarily transfer heat directly through radiation. However, infrared heaters indirectly cause conduction and convection heat transfer within a heating application. The following is a summary of the different types of heat transfer: Modine offers two types of infrared heaters; high-intensity and low-intensity. Both are certified for commercial and industrial applications only.
PAGE 3
Understanding Heat Spread and Throw/Distribution Before selection occurs, a solid understanding of the infrared heater heat spread/distribution is required to avoid potential misapplications of the equipment. This section provides the basic information to gain this understanding. Low Intensity Heat Spread/Distribution High Intensity Heat Spread/Throw Heat spread (width), as shown in Figure 3.1 is dependant on the mounting height and relatively unaffected by the mounting angle.
PAGE 4
Understanding Heat Spread and Throw/Distribution Low Intensity Heat Spread/Distribution (continued) length. The result is that tube temperatures start around 1000 to 1200°F on the burner end and fall to about 350 to 400°F on the opposite end (the vent end). For comfort radiant heating, once the tube temperature falls along its length to approximately 600°F and below, the radiant heat felt by occupants begins to decrease significantly.
PAGE 5
Infrared Heater Selection Procedure – General Table 5.1 – High Intensity Minimum Clearances to Combustibles (inches)  160 32 48 48 50 BACK OF HEATER TOP OF HEATER: BELOW HEATER: 18 18 30 30 32 28 40 42 52 60 72 72 98 120 132 72 80 98 120 132 - Standard Reflector - w/Optional Parabolic Reflector  Refer to the figures below. 90 30 60 SIDE OF HEATER Model Sizes 30 130 Table 5.
PAGE 6
Infrared Heater Selection Procedure – Spot Heating Table 6.1 – Spot Heater Selection Table Application/Intended Operation of the System IHR90 Spot Heating Spot heating is used for individual workers who require the replacement of body heat loss where heating the surrounding area with forced air heat would not be practical. Infrared heat is well suited for this application, as the objects (people) would be heated and not the surrounding air.
PAGE 7
Infrared Heater Selection Procedure – Partial Building/Area Heating Partial Building Heating Partial building or area heating is used for smaller areas within a building that are larger than a spot heating application. Examples include an assembly line or an open office/service counter area in the middle of a large open warehouse type building. These areas all have people moving about in a small area that need to be kept warm without heating the remainder of the building to comfort heating levels.
PAGE 8
Infrared Heater Selection Procedure – Total Building Heating Total Building Heating Total building heating applications involve replacing the building heat loss with at least the same amount of heat, placed near the areas of greatest heat loss. Total building heating applications with infrared are best accomplished using low intensity tube heaters. However, Modine offers a number of different heating equipment options for building heating, so all options should be considered.
PAGE 9
Infrared Heater Selection Procedure – Additional Selection Considerations Clearances to Combustibles and Heat-Affected Objects  Clearances to combustible materials must be maintained, including areas with stored or stacked materials. See pages 4 and 5 for additional information.  Clearance to heat affected objects such as sprinkler heads must be considered.
PAGE 10
Infrared Heater Selection Procedure – Additional Selection Considerations Wiring Multiple Low Voltage Heaters to a Single Thermostat When using a single thermostat to control multiple heaters with low voltage (24V) control, relays are required per the National Electric Code to isolate the control transformers on individual heaters so that the secondary side, or low voltage side of control transformers are not wired in parallel. Please see Literature #9-410, latest revision for additional details.
PAGE 11
Infrared Heater Selection Procedure – Additional Selection Considerations Table11.1 – Typical Infrared Heater Selection Considerations Application High Intensity Spot Heating Excellent choice. Partial Building Heating Good choice. Total Building Heating Fair choice for high mounting heights or if obstructions exist that would interfere with low intensity tube heater installations. Inexpensive Installation Excellent choice. All gas, power, and control connections are made in the same vicinity.
PAGE 12
Performance Data – Total Building Heating The data on this page applies only to Total Building Heating applications as discussed on page 8. Table 12.