Fluke 62 Max Application Note Twenty Ways The MAX+ Infrared Thermometer Can Save You Energy And Time

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Twenty ways the Fluke
62 MAX+ Infrared
Thermometer can save
you energy and time
Application Note

You might find it indispensable
Are you looking for a diagnostic tool that can save you money out of
the box? A tool that can help you troubleshoot malfunctioning HVAC
mechanical systems? One that is literally a “‘point and shoot” device?
The Fluke 62 MAX+ Infrared (IR) Thermometer is just that tool! In
fact, once you begin to use it you might find it indispensable. It has
become the first tool out of my tool bag (I’m a senior HVAC technician
and troubleshooter). In just a few weeks of using my Fluke 62 MAX+
IR Thermometer I found a large number of ways it could help me.
Here are some of the ways.

1. Check discharge air
temperature

3. Check inlet and outlet
water temperatures

You can check the discharge air
temperature of an HVAC unit
with a ceiling discharge while
standing on the ground. Not only
is this safer than using a ladder;
the values can be used to adjust
the control system and reduce
energy waste. Many air handling
units produce a 55 °F (12.7 °C)
discharge temperature.

Water coils in HVAC systems
typically use hot or chilled water.
You can quickly check the water
temperatures at the inlet and
the outlet of the coil with the
Fluke 62 MAX+ IR Thermometer.
This will indicate proper water
temperatures, heat transfer, and
valve operation. A check can also
indicate if there are any water
balance problems.

2. Check thermostat
accuracy
Occupants often complain about
being too hot or cold. You can
check the accuracy of the room
thermostat very quickly with the
Fluke 62 MAX+ IR Thermometer.
Then you can make adjustments
to the thermostat or replace the
thermostat if necessary.

4. Check air handler coil
temperatures
HVAC air handling units are
designed with specific coil temperatures. You can use the Fluke
62 MAX+ IR Thermometer to
quickly check the coil temperatures. This will reduce energy
waste and increase comfort.

“Many possible high-impact uses of the Fluke
62 MAX+ IR Thermometer exist, in addition to
the examples given here. Usually when I get to
the job site, I just start pointing and using the
Fluke 62 MAX+ IR Thermometer right away!”

From

the

Fluke

Digital

Library

@

www.fluke.com/library

5. Check boiler hot water 7. Check air distribution
temperatures
A room or space may have sevMany buildings use a hot water
heating system. You can check
the hot water boiler temperatures
easily, quickly, and safely with
the Fluke 62 MAX+ IR Thermometer. You can then adjust
the water temperature controls
to save energy and money.
A system that is even a few
degrees off over the course of
a heating season can result in
expensive energy expenditures.

eral air distribution ducts. One
or more of them may be shut
off. With the Fluke 62 MAX+
IR Thermometer you can identify those discharge ducts that
are shut off, by checking the
discharge temperatures of the
different ducts and noting those
that do not show the correct
discharge temperature.

properly. This increases safety
because you do not need to touch
the humidifier.

6. Check steam traps
Steam trap failure can waste
energy and cause improper HVAC
system operation, resulting in a
system freeze-up. With the Fluke
62 MAX+ IR Thermometer you
can quickly identify a steam trap
that has failed either open or
closed.

Measuring the steam temperature at the
inlet to the humidifier valve.

11. Check chiller set
points

Checking the discharge temperature at air
distribution ducts.

8. Check for hot and cold
spots

Viewing the temperature of the condensate
line from a steam trap, to make sure it is
functioning properly.

A large room or area may have
hot or cold spots due to system
design or installation. With the
Fluke 62 MAX+ IR Thermometer you can easily identify
these sources of discomfort and
complaints.

9. Check power supplies
in a panel
Many HVAC control panels have
multiple power supplies. You
can use the Fluke 62 MAX+ IR
Thermometer to quickly identify
the power supply that has failed
and is causing improper system
operation.

Many commercial buildings use
chilled water to cool the building. The chillers usually provide
water at 42 to 44 °F (5.5 to
6.6 °C). Energy will be wasted if
the chilled water temperature set
point is incorrect. You can use the
Fluke 62 MAX+ IR Thermometer to
make sure the chilled water temperature provided to the building
matches the set point.

12. Check low
temperature limits
Almost all commercial air
handling units provide a low temperature limit switch. To prevent
the freeze-up of a water coil, the
low temperature limit will stop
the supply fan. In some cases the
low temperature limit may be
adjusted incorrectly. You can use
the Fluke 62 MAX+ IR Thermometer to check the calibration of the
low temperature limit and adjust
as needed.

10. Check humidifier
operation
Testing the steam trap to see whether the
trap has failed open and is wasting steam.

2 Fluke Corporation

Many HVAC systems have a
humidifier installed. With the
Fluke 62 MAX+ IR Thermometer
you can quickly determine if
water or steam is present at the
humidifier and if it is operating

Looking at the water temperature at the inlet
to an air handling unit coil.

Twenty ways the Fluke 62 MAX+ Infrared Thermometer can save you energy and time

13. Safe checking of
ceiling-mount equipment

16. Check electric
heating coil operation

A large amount of HVAC equipment is mounted above the floor
in hard to reach areas, which
can cause a safety hazard. You
can use the Fluke 62 MAX+ IR
Thermometer to easily check the
temperature without exposing
yourself to any safety issues.

Many buildings use air handling
or terminal units with electric
heating elements. These include
heat pumps, VAV terminal boxes,
and air handling units. If the
controls are not functioning
properly, a large energy waste
can occur which can lead to very
high energy bills. You can use
the Fluke 62 MAX+ IR Thermometer to check the correct
temperature set points of the
electric heating coils.

which will cause product loss.
You can easily check the defrost
system operation with the Fluke
62 MAX+ IR Thermometer.

20. Check refrigerant coil
surface temperatures and
condenser temperatures

17. Check compressor
temperature

Identifying the temperature of ceiling-mount
equipment.

14. Check operation of
VAV box hot water reheat
Variable air volume (VAV)
systems are the most common
type of HVAC system installed
today. The VAV terminal boxes
control airflow and temperature
in the building spaces. Many
VAV terminal boxes are located
at the perimeter of the building
and include hot water reheat
coils. These reheat coils have
automatic valves. You can use the
Fluke 62 MAX+ IR Thermometer
to check the discharge air temperature of the VAV box as well
as the reheat coil inlet and outlet
water temperatures. These temperatures will indicate whether
the hot water valve is opening
and closing properly.

15. Check return air
temperatures
In addition to checking the
supply air temperatures of a
terminal or air handling unit,
it is often necessary to check
the temperature of the return
air from the room. The Fluke
62 MAX+ IR Thermometer is an
ideal instrument to use to check
the return air temperature.
3 Fluke Corporation

Air conditioning and refrigeration compressor failures are a
source of very high repair bills.
They also cause product loss and
system downtime. This can be
very expensive. You can use the
Fluke 62 MAX+ IR Thermometer
to check the compressor temperatures and detect problems
before they lead to expensive
failures.

18. Check cooler and
freezer temperatures
It is absolutely critical that
products in coolers and freezers
are maintained at the correct
temperature. The Fluke 62 MAX+
IR Thermometer can quickly
show that the products in a
cooler or freezer are stored under
the proper conditions. Since you
can point the Fluke 62 MAX+
IR Thermometer at any products
in the refrigerated space, it is
superior to simple fixed location thermometers. And at the
same time you check the product
temperatures, you can check the
evaporator coil and discharge air
temperatures as well.

Taking the temperature of condensate as it
goes into the drain.

Another use of the Fluke 62
MAX+ IR Thermometer is to check
the actual coil temperatures of
refrigeration system evaporators
and condensers. These temperatures indicate proper system
operation and efficiency. Improper
coil temperatures can help
identify problems while they are
small and easily correctable.
Many possible high-impact
uses of the Fluke 62 MAX+ IR
Thermometer exist, in addition to
the examples given here. Usually when I get to the job site, I
just start pointing and using the
Fluke 62 MAX+ IR thermometer
right away!

19. Check for defrost
temperatures
Ice build-up on low temperature coils will reduce equipment
efficiency. Defrost systems are
provided to melt the ice when
needed. If the defrost system
operates improperly, the refrigeration system may ice up and fail,

Twenty ways the Fluke 62 MAX+ Infrared Thermometer can save you energy and time

Fluke.	 Keeping your world
	
up and running.®
Fluke Corporation
PO Box 9090, Everett, WA 98206 U.S.A.
Fluke Europe B.V.
PO Box 1186, 5602 BD
Eindhoven, The Netherlands
For more information call:
In the U.S.A. (800) 443-5853 or
Fax (425) 446-5116
In Europe/M-East/Africa +31 (0) 40 2675 200 or
Fax +31 (0) 40 2675 222
In Canada (800)-36-FLUKE or
Fax (905) 890-6866
From other countries +1 (425) 446-5500 or
Fax +1 (425) 446-5116
Web access: http://www.fluke.com
©2014 Fluke Corporation.
Specifications subject to change without notice.
Printed in U.S.A. 10/2014 6003588a_en
Modification of this document is not permitted
without written permission from Fluke Corporation.



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