Bacharach Fyrite Pro, Fyrite Pro 100, Fyrite Pro 105, Fyrite Pro 110, Fyrite Pro 120 Operation & Maintenance Manual

Fyrite® Pro

Combustion Gas Analyzer

Instruction 0024-9395

Operation & Maintenance

Rev. 12 – October 2010

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Product Leadership • Training • Service • Reliability

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WARRANTY

Bacharach, Inc. warrants to Buyer that at the time of delivery this Product will be free from defects in mater ial
and manufac ture and will conform substan tially to Bach arach Inc.’s ap plicable spec i fi ca tions. Bacharach’s
li a bil i ty and Buyer’s remedy under this warranty are lim it ed to the repair or replacement, at Ba charach’s option,
of this Product or parts thereof returned to Seller at the factory of manufac ture and shown to Bacharach Inc.’s
reasonable satisfaction to have been defective; provided that written notice of the defect shall have been given
by Buyer to Bacharach Inc. within two (2) years after the date of delivery of this Product by Bacharach, Inc.

Bacharach, Inc. warrants to Buyer that it will convey good title to this Product. Bacharach’s liability and Buyer’s
remedy under this warranty of title are limited to the removal of any title defects or, at the election of Bacha rach,
to the replacement of this Product or parts thereof that are defective in title.

THE FOREGOING WARRANTIES ARE EXCLUSIVE AND ARE GIVEN AND ACCEPTED IN LIEU OF (I) ANY
AND ALL OTHER WARRANTIES, EXPRESS OR IMPLIED, IN CLUD ING WITH OUT LIMITATION THE IM­PLIED WARRANTIES OF MERCHAN TABILITY AND FITNESS FOR A PARTICULAR PURPOSE: AND (II) ANY
OBLIGA TION, LIABILITY, RIGHT, CLAIM OR REM E DY IN CON TRACT OR TORT, WHETHER OR NOT ARIS­ING FROM BACH A RACH’S NEGLIGENCE, ACTUAL OR IM PLIED. The remedies of the Buyer shall be limited
to those provided herein to the exclusion of any and all other remedies includ ing, without limita tion incidental or
consequen tial dam ag es. No agree ment varying or ex tend ing the foregoing warranties, remedies or this limita­tion will be binding upon Bacharach, Inc. unless in writing, signed by a duly au tho rized officer of Bacharach.

Register Your Warranty by Visiting

www.MyBacharach.com

Notice:

Product improvements and enhancements are continuous, therefore the spec i fi ca tions and in for ma tion
contained in this document may change without notice.

Bacharach, Inc. shall not be liable for errors contained herein or for incidental or consequential damages in
connection with the furnishing, performance, or use of this material.

No part of this document may be photocopied, reproduced, or translated to another language without the prior
written consent of Bacharach, Inc.

Copyright © 2002–2010, Bacharach, Inc., all rights reserved.
BACHARACH and Fyrite are registered trademarks of Bacharach, Inc. All other trademarks,
trade names, service marks and logos referenced herein belong to their respective companies.

A

Instruction 0024-9428

Fyrite Pro

Contents

Ordering Information .......................................................... iii

1.0 INTRODUCTION .............................................................. 1

1.1 The Fyrite Pro..................................................................................1

1.2 Operational Overview .....................................................................2

2.0 TECHNICAL CHARACTERISTICS .............................. 3

3.0 SETTING UP THE ANALYZER ..................................... 5

3.1 Preliminary Steps ............................................................................5

3.2 Checking & Replacing the Batteries .............................................. 5

3.3 Connecting the Probe Hose and Thermocouple ............................. 6

3.4 Front Panel Push Buttons ............................................................11

3.5 Setup Mode ....................................................................................12

3.5.1 Entering Setup ................................................................12

3.5.2 Selecting Temperature Units ..........................................12

3.5.3 CO Channel Setup ...........................................................13

3.5.4 Draft Channel Setup .......................................................13

3.5.5 Time Setup .......................................................................14

3.5.6 Date Setup ....................................................................... 14

3.5.7 Year Setup ....................................................................... 15

3.5.8 Selecting Printer Protocol ...............................................15

3.5.9 Exiting the Setup Screen ................................................ 15

4.0 OPERATION .................................................................... 17

4.1 Performing CO and Draft Testing ................................................ 17

4.1.1 Analyzer Turn On and Warm Up ...................................17

4.1.2 Measuring CO ..................................................................18

4.1.3 Measuring Draft .............................................................. 18

4.2 Performing a Combustion Test using the Model 110/120/125 ....19

4.2.1 Analyzer Turn On and Warm Up ...................................19

4.2.2 Selecting a Fuel ............................................................... 19

4.2.3 Sampling Point ................................................................20

4.2.4 Performing a Combustion Effi ciency Test ...................... 22

4.2.5 Ending a Combustion Test .............................................. 22

4.3 Operating Tips ............................................................................... 23

4.4 Using the Backlight .......................................................................24

4.5 Using the Probe .............................................................................24

4.6 Saving Test Data in Memory ........................................................ 24

Instruction 0024-9395

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Fyrite Pro

4.7 Opening and Viewing Saved Test Data .......................................25

4.8 Printing Test Data.........................................................................26

4.9 Clearing Saved Test Data .............................................................28

4.10 Turning OFF the Analyzer & CO Purge .....................................28

4.11 Resetting the Microprocessor ...................................................... 29

4.12 Run Mode Screens ........................................................................29

4.13 Screen Descriptions ..................................................................... 33

4.13.1 Warm-Up Screens .........................................................33

4.13.2 CO Screen .....................................................................33

4.13.3 CO & Draft Screen ........................................................ 34

4.13.4 Draft Zero Screen ......................................................... 34

4.13.5 Fuel Screen ................................................................... 35

4.13.6 O

4.13.7 CO & O

4.13.8 CO

Screen .......................................................................35

2

Screen ............................................................36

2

& Excess Air Screen ............................................. 36

2

4.13.9 Temperature Differential Screen .................................37

4.13.10 Stack Temperature & Effi ciency Screen ...................37

4.13.11 Ambient Air Temperature Screen ............................38

4.13.12 CO Air Free Screen ...................................................38

4.13.13 Sensor Error Screen ..................................................39

5.0 CALIBRATION & MAINTENANCE ............................ 41

5.1 Entering the Calibration Mode and Testing

the Display Segments ....................................................................41

5.2 Ambient Temperature Calibration ..............................................42

5.3 Combustion Air Thermocouple Calibration ................................42

5.4 Stack Thermocouple Calibration .................................................. 43

5.5 Oxygen Sensor Zero ...................................................................... 44

5.6 CO Sensor Zero & Calibration ...................................................... 45

5.7 Draft Calibration .......................................................................... 47

5.8 Water Trap / Filter Maintenance .................................................48

5.9 O

Sensor Replacement ................................................................. 49

2

5.10 CO Sensor Replacement ..............................................................50

5.11 Pump Assembly Replacement ..................................................... 51

6.0 PARTS & SERVICE ........................................................ 55

6.1 Replacement Parts ........................................................................ 55

6.2 Accessories .....................................................................................55

6.2.1 Standard Accessories ......................................................55

6.2.2 Optional Accessories ........................................................56

6.3 Service Centers .............................................................................. 57

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Instruction 0024-9395

Fyrite Pro
Confi gurations

Fyrite Pro

Ordering Information

Model 100 100

Printer

Kit

24-

Part Number

Measurements:

Oxygen
Stack

Temperature 
Ambient

Temperature 
Second

Thermocouple
Channel
(Combustion Air
Temperature)

8200

24-

8201

105 1 10 120 125 125

Printer

Kit

24-

8202

24-

8103



24-

8104

24-

8105



24-

8205

125

Printer/

Oil Kit

24-

8206

Differential
Temperature 

Carbon Monoxide
(CO)  

Draft
Differential

Presssure* 

Instruction 0024-9395



iii

Fyrite Pro

Notes:

iv

Instruction 0024-9395

Fyrite Pro

1.0 INTRODUCTION

1.1 The Fyrite Pro

The Fyrite Pro series of instruments are hand-held an a lyz ers that are
designed for on-demand sampling of residential furnaces and appliances.
The more advanced models can also to used to check combustion efficiency
by measuring the stack temperature and the percent oxygen level in the
flue-gas stream.

The Fyrite Pro is completely upgradable from the very simple Model 100
that measures only carbon monoxide, to the Model 125 that measures
carbon monoxide (CO), oxygen (O
air temperature, stack temperature, and combustion air temperature, as
well as calculating combustion efficiency, excess air, carbon dioxide (CO
differential temperature, and CO air free.

), draft, differential pressure, ambient

2

),

2

This manual contains information on all models of the Fyrite Pro. Please
disregard any information that does not pertain to your model.

WARNING S!

This analyzer should not be used on a continuous basis.

This analyzer does not have an audible alarm, and should
not be used as a safety device.

Except for battery replacement, this analyzer should only be
opened and ser viced by au tho rized personnel.

When testing an appliance, a full visual in spec tion of the
appliance should be carried out to ensure its safe op er a tion.

CAUTION!

When the instrument is used in an ineffi cient furnace or
boiler application where there is a high emission of soot,
probe sample fi lter may become clogged. Check fi lter before
every use to confi rm that it is clean for use or replace with
a new fi lter. To prevent this from occurring, a smoke test
should be performed before operating under such conditions
to ensure that the furnace is burning at a level appropriate
for the use of this instrument.

Instruction 0024-9395

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Fyrite Pro

1.2 Operational Overview

Pressing the I/O button turns the analyzer ON. Note that there is a warm-

up period of either 10 or 60 seconds, dependent on the analyzer’s model and
setup, that must elapse before the analyzer can be used.

When using the analyzer to just measure CO or draft, insert the analyz­er’s probe into the flue-gas stream of the appliance under test and begin
testing. The measured values of draft and/or CO will appear on the ana­lyzer’s LCD.

For models that calculate combustion efficiency, choose a fuel code that cor­responds to the fuel being burned by the appliance being tested, and then

press the ENTER button to place the analyzer into its Run Mode. Begin

testing by inserting the analyzer’s probe tube into the flue-gas stream
of the appliance under test. The analyzer will monitor the flue gas and
display measured and calculated values that are relative to the combustion
process. These values are dis played on the analyzer’s LCD, and are chosen
for display by pressing the In cre ment (▲) and Dec re ment (▼) but tons.

Pressing the HOLD button during a test will freeze all measured and calculat­ed values at their current levels. Pressing the ENTER button resumes testing.

For analyzers with memory, pressing the HOLD button twice during a

test will display the Print/Memory Menu Screen. Using the ▲▼ and

ENTER buttons the operator can choose to print the current readings,

save the current readings in memory, recall and view saved readings from
memory, clear all the memory, or print all saved readings.

A backlight enables an operator to read the display in dimly-lit areas.

Pressing the LIGHT button turns the backlight ON and OFF. The backlight

will automatically turn OFF after 10 minutes of keyboard inactivity.

A power saver function will shut the analyzer OFF after 20 min utes of key­board inactivity. For models with an O
saver function is dis abled if the detected O

and CO sensor, however, the power

2

value is less than 17.9% or the

2

CO value is more than 50 ppm.

Press the I/O button to turn the analyzer OFF. Note that there is a 5 sec-

ond delay before the analyzer actually turns OFF, during which time the

unit can be kept ON by pressing the ENTER button. For analyzers that

contain a CO sensor, there is a CO purge feature that keeps the analyzer’s
pump running until the measured CO level drops below 50 ppm.

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Instruction 0024-9395

Fyrite Pro

2.0 TECHNICAL CHARACTERISTICS

The Analyzer Directly Measures and Displays:

• Ambient Temperature ............................32 to 212 °F (0 to 100 °C)

• Flue Gas O

• Flue Gas Temperature ...........................0 to 999 °F (–18 to 537 °C)

• Flue Gas CO content ..............................0 to 2,000 ppm CO

• Draft ........................................................–9.99 to 27 inWC

The Analyzer Computes and Displays:

(when the measured oxygen level is below 17.9%)

• Combustion Efficiency ............................0.1 to 99.9%

• Flue Gas CO

• Flue Gas CO Air-Free content ...............0 to 9,999 ppm

• Excess Air ...............................................0 to 400%

content ................................ 0.0 to 20.9% O

2

2

(–9.99 to 67 mb/HPa)

content .............................0.1 to a fuel dependent

2

maximum value in %

Fuel Selection:

(F1 thru F4 denotes the fuel selected as displayed on the LCD)

• Natural Gas (F1)

• Oil #2 (F2)

• LPG (F3)

• Kerosene (F4)

Normal Operating Conditions:

Temperature:

• Analyzer .................................................32 to 104 °F (0 to 40 °C)

• Probe .......................................................1,000 °F max (538 °C) at

5" insertion

Humidity .......................................................15 to 90% RH,

Non-Condensing

Power Requirements ....................................Four disposable ‘AA’ Alkaline

batteries (an optional AC adapt­er is available that eliminates
the need for batteries)

Operating Time ................................. Up to 18 hours con tin u ous (pump

run ning and backlight off)

Warm Up Time ................................... 10 or 60 seconds, dependent on

Instruction 0024-9395

analyzer’s model and setup (Refer
to Section 4.13.1)

3

Fyrite Pro

Memory

(Model 105/110/120/125) ..................... Up to 10 sets of readings can be

saved in memory. When memory
is full, the next reading saved will
overwrite the oldest reading.

Display ................................................ 4 Digit, 2 Line, 7-segment Liquid

Crystal Dis play

Front Panel Controls ....................... Six push button switches

(Refer to Section 3.4)

Accuracy:

• Oxygen............................................. ±0.3% O

concentration of CO

with a typical flue gas

2

2

• Carbon Monoxide ............................ ±5% of reading or ±10 ppm, which-

ever is greater*

• Flue Gas Temperature .................... ±4 °F between 32 & 255 °F

(±2 °C between 0 & 124 °C)
±6 °F between 256 & 480 °F
(±3 °C between 125 & 249 °C) ±8 °F
between 481 & 752 °F
(±4 °C between 250 & 400 °C)

• Second Thermocouple Channel ...... ±4 °F between 32 & 212 °F

(±2 °C between 0 & 100 °C)

• Ambient Temperature ..................... ±4 °F between 32 & 104 °F

(±2 °C between 0 & 40 °C)

• Draft ................................................ ±1% of reading or ±0.02 inWC

(±0.05 mB), whichever is greater

* Tighter CO accuracy in the lower ranges, up to ±2 ppm, may be

attained if a lower range calibration gas (e.g. 100 ppm CO) is used.

4

Instruction 0024-9395

Fyrite Pro

3.0 SETTING UP THE ANALYZER

3.1 Preliminary Steps

Before using the analyzer . . .

• Check batteries (Section 3.2)

• Connect probe to analyzer (Section 3.3)

• Check setup (Section 3.5)

3.2 Checking & Replacing the Bat ter ies

Install fresh batteries as described below. Check the analyzer for sufficient
charge prior to each use. Replace the batteries if the low-battery symbol

appears in the lower right corner of the screen. To re place the bat-

ter ies:

1. Remove battery cover from back of analyzer.

2. If old batteries are installed, remove them and properly discard.

3. Observing the polarity markings inside the battery com part ment,
install four ‘A A’ Al ka line bat ter ies as shown in Fig ure 3-1.

4. Replace battery cover.

Remove battery cover by
pushing down on cover
and sliding it outward

Figure 3-1. Battery Installation

Instruction 0024-9395

5

Fyrite Pro

3.3 Connecting the Probe Hose and
Thermocouple

The analyzer’s model number determines which hose and thermocouple
connections are made at the bottom of the unit. Perform the following steps
as required by your particular analyzer model (see Figures 3-2A thru D):

1. Push the probe’s sample-gas hose onto the GAS inlet fitting.

2. Push the probe’s draft hose onto the “+” pressure fitting.

3. Push the probe’s thermocouple into the T-STACK jack

Important: DO NOT force the thermocouple connector into

its jack. The con nec tion tabs are dif fer ent sizes, allowing the
connector to fit in only one way.

4. Push the optional room-air/primary-air thermocouple into the
T-AIR jack.

Inspect the flue-gas hose for cracks. If a hose is defective, replace the en­tire probe assembly.

Before using the analyzer, check that the Water Trap / Filter is dry and
not dirty. If necessary, dry out the trap and replace the filter el e ment per
Section 5.8.

6

Instruction 0024-9395

PROBE TUBE

Fyrite Pro

AC ADAPTER
JACK

GAS INLET

SAMPLE-GAS
HOSE

PROBE STOP
(Optional)

WATER TRAP /
FILTER ASSEMBLY

Figure 3-2A. Connecting the 0019-7110 Probe (Model 100)

Instruction 0024-9395

7

AC ADAPTER
JACK

Fyrite Pro

GAS DRAFT

DIFFERENTIAL
PRESSURE HOSE
(Optional)

THERMOCOUPLE
CONNECTOR
(Not used on the
Model 105)

SAMPLE-GAS
HOSE

WATER
TRAP / FILTER
ASSEMBLY

DRAFT HOSE

PROBE TUBE

PROBE STOP

PROBE
HANDLE

Figure 3-2B. Connecting the 0024-3004 Probe (Model 105)

8

Instruction 0024-9395

Fyrite Pro

PROBE TUBE

PROBE STOP
(Optional)

AC ADAPTER
JACK

GAS
INLET

SAMPLE-GAS
HOSE

T-STACK

THERMOCOUPLE
CONNECTOR
(T-STACK)

WATER TRAP /
FILTER ASSEMBLY

Figure 3-2C. Connecting the 0019-7111 Probe (Model 110/120)

Instruction 0024-9395

9

AC ADAPTER
JACK

Fyrite Pro

GAS DRAFT

T-STACK

T-AIR

ROOM AIR /
PRIMARY AIR
THERMOCOUPLE
CONNECTOR
(T-AIR)

DIFFERENTIAL
PRESSURE HOSE
(Optional)

SAMPLE GAS
THERMOCOUPLE
CONNECTOR
(T-STACK)

SAMPLE-GAS
HOSE

WATER
TRAP / FILTER
ASSEMBLY

DRAFT HOSE

PROBE TUBE

PROBE STOP

PROBE
HANDLE

Figure 3-2D. Connecting the 0024-3004 Probe (Model 125)

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Instruction 0024-9395

Fyrite Pro

3.4 Front Panel Push Buttons

Note that a push button may perform several functions, depending on the
analyzer’s model number and what screen is being displayed at the time.

I/O • Toggles the analyzer ON and OFF.

• Places the analyzer into either its Setup or Calibration Mode

when used in conjunction with the ENTER or HOLD button.

▲ • Scrolls up through the display screens during a test.

• Causes the displayed value to increase or change while in the
Calibration, Setup, or Print/Memory Menu Screen.

▼ • Scrolls down through the display screens during a test.

• Causes the displayed value to decrease or change while in the
Calibration, Setup, or Print/Memory Menu Screen.

ENTER • Enters the Run Mode (starts a combustion test) from the Fuel

Select Screen.

• Unfreezes the display after pressing the HOLD button.

• Displays the Fuel Select Screen when held down for 2 seconds
while in the Run Mode.

• Performs the action selected in the Print/Memory Menu Screen.

• Stores the displayed value and automatically steps to the next
screen when pressed during calibration or setup.

• Places the unit into its Run Mode when held down for 2 seconds
while in the Calibration Mode.

• Aborts turn-off and keeps the analyzer turned ON when
pressed during the 5 second turn-off-delay period.

• Aborts the CO purge function at turn-off when the measured
CO level is above 50 ppm.

• Sets up the analyzer to be placed into its Calibration Mode
when held down with the analyzer OFF. (Used in conjunction

with the I/O button.)

HOLD • Places the analyzer on hold and freezes the values in all Run

Mode Screens during a test, allowing the op er a tor to scroll
through the displays and view all test values at that point in

time. Pressing ENTER resumes testing.

• Model 100: Starts a printout when pressed twice from the Run Mode.

• Model 105/110/120/125: Displays the Print/Memory Menu
Screen when pressed twice from the Run Mode.

• Sets up the analyzer to be placed into its Setup Mode when held down

with the analyzer OFF. (Used in conjunction with the I/O button.)

LIGHT

Instruction 0024-9395

Toggles the back light ON and OFF.

11

Fyrite Pro

3.5 Setup Mode

The analyzer is preset at the factory for the parameters shown below, but
can be changed as described in their associated sec tions.

Function Parameter To Change

Fuel Natural Gas (F1) Section 4.13.5
Temperature Unit °F Section 3.5.2
CO Channel Auto Zero (A2) Section 3.5.3
Draft (Pressure) WC Section 3.5.4
Clock Not Initialized Section 3.5.5 thru 3.5.7
Printer Protocol IrDA Section 3.5.8

3.5.1 Entering Setup

1. With the analyzer turned OFF, press and hold down the HOLD

button.

2. Press the I/O button.

3. Release both buttons.

4. The analyzer is now in its Setup Mode. Refer to Sec tions 3.5.2 thru

3.5.8 for information on how to set up each analyzer parameter.

3.5.2 Selecting Temperature Units

The Temperature Setup Screen is labeled “Unit.”

1. Enter the Setup Mode per Section 3.5.1. If necessary, repeatedly

press the EN TER button until “Unit” is dis played.

2. Press the ▲ or ▼ button until the desired temperature unit (°F or
°C) is displayed.

3. Press ENTER to move to the next Setup Screen, or I/O to exit setup.

12

Instruction 0024-9395

Fyrite Pro

3.5.3 CO Channel Setup

The CO Channel Setup Screen is labeled “CO.”

1. Enter the Setup Mode per Section 3.5.1. If necessary, repeatedly

press the ENTER button until “CO” is displayed.

2. Press the ▲ or ▼ button until the desired parameter is dis played.

- no Sensor disabled. Use this function to turn off the CO chan­nel if the sensor is missing or known to be bad to avoid inac­curate CO readings from appearing.

- 2Ero Manual Zero. When the CO channel is set to man u al zero,
the analyzer does not zero the CO sensor to ambient condi­tions during start up.

- A2 Auto Zero. With the CO channel set to auto zero, the CO
sensor is zeroed to the ambient CO level during start up.

Important: When using this mode the analyzer must

be turned ON in fresh air; otherwise, in cor rect CO
readings will occur.

3. Press ENTER to move to the next Setup Screen, or I/O to exit setup.

3.5.4 Draft Channel Setup

The Draft Setup Screen is labeled “PrES Unit”.

1. Enter the Setup Mode per Section 3.5.1. If necessary, repeatedly

press the ENTER button until “PrES” is displayed.

2. Press the ▲ or ▼ button until the desired parameter is dis played.

- no Pressure sensor disabled or not installed.

- WC inches of Water Column

- mB Millibars

- HPa Hecto Pascals

3. Press ENTER to move to the next Setup Screen, or I/O to exit setup.

Instruction 0024-9395

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Fyrite Pro

3.5.5 Time Setup

There are two Time Setup Screens, one for hours and the other for min­utes. Two bars appear above the segments being changed. The clock is in
a 24 hour format, but will appear as AM/PM on the printout.

1. Enter the Setup Mode per Section 3.5.1. If necessary, repeatedly

press ENTER until the first Time Setup Screen is displayed—the

one with two bars over the hour digits.

2. Press the ▲ or ▼ button until the correct hour value is displayed.

3. Press ENTER to move the selection bars over the minute digits.

4. Press the ▲ or ▼ button until the correct minute value is displayed.

5. Press ENTER to move to the next Setup Screen, or I/O to exit setup.

3.5.6 Date Setup

There are two Date Setup Screens, each labeled “DAtE”. The first screen
sets the month while the second sets the day.

1. Enter the Setup Mode per Section 3.5.1. If necessary, repeatedly

press ENTER until the first Date Setup Screen is displayed.

2. Press the ▲ or ▼ button until the correct month is displayed.

3. Press ENTER to change the ‘Day’ value.

4. Press the ▲ or ▼ key until the correct day is displayed.

5. Press ENTER to move to the next Setup Screen, or I/O to exit setup.

14

Instruction 0024-9395

Fyrite Pro

3.5.7 Year Setup

The Year Setup Screen is labeled “YEAr”.

1. Enter the Setup Mode per Section 3.5.1. If necessary, repeatedly

press ENTER until the Year Setup Screen is displayed.

2. Press the ▲ or ▼ button until the correct year is displayed.

3. Press ENTER to move to the next Setup Screen, or I/O to exit setup.

3.5.8 Selecting Printer Protocol

The analyzer can be set up for either an HP or IrDA type printer.

1. Enter the Setup Mode per Section 3.5.1. If necessary, repeatedly

press ENTER until one of the following screens is displayed.

2. Press the ▲ or ▼ button to select the desired printer protocol.

3. Press ENTER to move to the next Setup Screen, or I/O to exit setup.

3.5.9 Exiting the Setup Screen

Press the I/O button at any time to exit the Setup Mode and turn OFF the

analyzer. Note that the last displayed parameter is automatically saved in
memory.

Instruction 0024-9395

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Fyrite Pro

Notes:

16

Instruction 0024-9395

Fyrite Pro

4.0 OPERATION

4.1 Performing CO and Draft Testing

4.1.1 Analyzer Turn On and Warm Up

1. Connect the probe and make sure that the analyzer is properly set
up per Sec tion 3.0.

2. Turn ON the analyzer in fresh air by pressing is I/O button and

observe that the following Warm-Up Screens are displayed.

These screens show the analyzer’s model number, the unit’s soft-

ware revision, and finally the remaining warm-up time. If an O
sensor is installed, then its current output level is also displayed.

2

Note: The warm-up time is 10 seconds for analyzers that do

not contain an oxygen sensor, and have their CO channel
set up for manual zero. The warm-up time is 60 seconds for
analyzers that contain an oxygen sensor, and/or have their
CO channel set up for auto zero.

Tip: An O

drops to between 80 and 90. Consider replacing the oxygen
sensor when its output level drops below 100.

3. Wait for the analyzer to count down its warm-up period; after
which, either the CO Screen (Model 100), the CO & Draft Screen
(Model 105), or the Fuel Screen (Model 110/120/125) is displayed.

Model 100 Model 105 Model 110/120/125

If, however, any errors were detected during warm-up, the Sensor

Status Screen is displayed. If this occurs, refer to Section 4.13.13 for
information on how to correct the error.

error will occur when the oxygen sensor’s output

2

Instruction 0024-9395

17

Fyrite Pro

4.1.2 Measuring CO (Model 100/105/120/125)

1. Turn ON the analyzer and allow it to warm-up per Section 4.1.1.

Important: If the CO channel is set up for auto zero, then

the analyzer must be turned ON in fresh air; otherwise,
incorrect CO readings will occur. Refer to Section 3.5.3.

When the CO channel is set up for manual zero, and if the
CO reading is higher than zero when sampling fresh air, then
manually zero the CO channel per Section 5.6, Steps 1 thru 4.

2. For the Model 100/105, the CO Screen should already be displayed. For

the Model 120/125, push ENTER until the CO & O

Model 100 Model 105 Model 120/125

Screen appears.

2

3. Insert the analyzer’s probe into the area to be tested and observe
the detected CO level on the LCD.

4.1.3 Measuring Draft (Model 105/125)

1. Turn ON the analyzer and allow it to warm-up per Section 4.1.1.

2. For the Model 105, the CO & Draft Screen should already be dis-

played. For the Model 125, press ENTER and then press the ▲ or▼

button as necessary to display this screen.

3. The draft reading should be zero when sampling room air. If not,
press the ▼ button once to display the Draft Zero Screen, and then

press the ENTER button to zero the draft channel to ambient atmo-

spheric conditions.

4. Insert the analyzer’s probe into the area to be tested and observe
the draft reading on the LCD.

18

Instruction 0024-9395

Fyrite Pro

4.2 Performing a Combustion Test using
the Model 110/120/125

4.2.1 Analyzer Turn On and Warm Up

Important: The probe must be at room temperature before

performing the following steps.

1. Connect the probe and make sure that the analyzer is properly set
up per Sec tion 3.0.

2. Perform one of the following:

• Model 110/120 – Before turning ON the analyzer, its probe must
be located in the area containing the burner’s combustion-air sup­ply. If the burner is using room air, simply place the probe within
the room. In the case of a high-efficiency furnace where combus­tion air is drawn in from an outside source, insert the probe into
the combustion-air stream so it can measure its temperature with
the burner op er at ing.

• Model 125 – This analyzer has a second thermocouple channel
that can be used to independently monitor the temperature of the
burner’s combustion-air supply. When using this second thermo­couple channel, insert the thermocouple into the burner’s combus­tion-air stream, and position the probe to measure the ambient
room temperature. If the second thermocouple channel is not
used, then use the probe’s thermocouple to measure the combus­tion-air temperature as described above for the Model 110/120.

3. Turn ON the analyzer and allow it to warm-up per Section 4.1.1.

4.2.2 Selecting a Fuel

1. With Fuel Screen displayed, use the ▲ or ▼ button to step through
the fuels codes until the proper fuel is selected. The analyzer de­faults to the most re cent ly se lect ed fuel.

F1 = Natural Gas
F2 = Oil #2
F3 = LPG
F4 = Kerosene

2. Press the ENTER button to select the displayed fuel code and enter

the Run Mode.

Instruction 0024-9395

19

Fyrite Pro

4.2.3 Sampling Point

Forced Air Furnace – When testing atmospheric burner or gravity
vented, forced air heating equip ment with a clamshell or sectional heat
exchanger design, test each of the exhaust ports at the top of the heat ex­changer. The probe should be inserted back into each of the exhaust ports
to obtain a flue gas sample, before any dilution air is mixed in.

Hot Water Tank – Domestic hot water tanks with the ‘bell’ shaped draft
diverter on top can be accurately tested by inserting the probe tip directly
into the top of the fire tube be low the diverter.

80% Efficiency Fan Assist or Power Vented – Combustion testing of
fan assist or power vented, furnaces/boilers should be done through a hole
drilled in the vent immediately above the inducer fan.

90% Efficiency Condensing – Condensing furnaces/boilers can be tested
through a hole drilled in the plastic vent pipe (when allowed by the manufac­turer or local authority of jurisdiction) or taken from the exhaust termination.

Atmospheric or Gravity Vented Boiler – Boilers, which have a ‘bell’
shaped draft diverter directly on top, should be tested directly below the
diverter through a hole drilled in the vent connector.

Atmospheric Burner or

Gravity Vented Forced Air Hot Water Tank

20

Instruction 0024-9395

Fyrite Pro

80% Eff. Fan Assist

or Power Vented

Furnace/Boiler

90% Eff. Condensing

Furnace/Boiler

Atmospheric or

Gravity Vented Boiler

Instruction 0024-9395

21

Fyrite Pro

4.2.4 Performing a Com bus tion Efficiency Test

1. After turning ON the analyzer and selecting the appropriate fuel,
press the ▲ or ▼ button to display the Stack Temperature & Ef­ficiency Screen (refer to Section 4.13.10).

2. Position the probe in the flue-gas stream to obtain the hottest
“Stack” reading. Lo cat ing the highest stack temperature is very im-

por tant for ac cu rate ef fi cien cy calculations.

3. Burner-service pro ce dures can now begin. Use the ▲ and ▼ buttons

to scroll through the analyzer’s other display screens (refer to Sec­tion 4.12). The analyzer read ings will update con tin u ous ly showing
changes in burner performance.

Note: When a calculation cannot be made because of im-

proper data (i.e., oxygen level above 17.9%), four dashes “- - -

-” appear in place of the calculated value on both the screen
and printout.

Tip: Pressing the HOLD button will freeze all readings and

stop the pump, allowing the operator to scroll through the
Run Mode Screens and examine the readings at any single

point in time. Press ENTER to restart the pump and resume

testing.

4.2.5 Ending a Combustion Test

WARNING! Burn Hazard. Do not touch the probe after

removing it from the stack. Allow the probe to cool before
handling (about 5 minutes).

1. Remove probe from the flue-gas stream.

2. Allow the pump to run until all combustion gases are flushed from
the analyzer as indicated by the O

reading returning to 20.9%.

2

3. Turn OFF the analyzer per Section 4.10.

22

Instruction 0024-9395

Fyrite Pro

4.3 Operating Tips

• When an analyzer is brought in from a cold vehicle, let it warm up
slowly to minimize condensation. Temperatures below freezing will not
damage the analyzer; however, bringing a cold analyzer into a warm,
humid environment may cause condensate to form inside the case.

• If the CO channel (Model 100/105/120/125) is set up for Auto Zero
(refer to Section 3.5.3), ensure that the analyzer is sampling fresh air
when turned ON. Pulling a flue-gas sample through the analyzer dur­ing its warm-up period will not damage the analyzer, but it will result
in incorrect CO readings. Also note that a CO sensor error will occur if
the detected CO level is above 50 ppm during warm-up.

• For analyzers that are used to measure flue-gas, note that flue-gas
condensate is acidic and very corrosive. It is important not to allow
the analyzer’s internal components to become soaked in condensate for
long periods of time.

• Before each use, inspect the filter element of the water-trap / filter as­sembly. Replace the filter if it looks dirty.

• When sampling flue-gas, keep the analyzer above the water-trap, and
keep the trap in a vertical position. This will maximize the effective­ness of the trap and keep liquid condensate from being drawn directly
into the analyzer.

• When liquid condensate is seen inside the water trap, empty the trap
before it becomes full. Refer to Section 5.8.

• It is recommended that the analyzer be purged after taking a flue-gas
measurement before turning it OFF. Once the probe is removed from
the stack, disconnect the hose assembly from the bottom of the analyz­er and let the pump run for 10 minutes or so to completely remove any
remaining flue gases and dry any condensate from inside the sensor
chamber.

• When storing the analyzer, it’s a good idea to empty the water trap and
leave it open to further dry it out.

• Calibrate the analyzer every 6 months to ensure its accuracy.

Instruction 0024-9395

23

Fyrite Pro

4.4 Using the Backlight

The LCD can be read in dimly-lit areas by pressing the LIGHT button.

The backlight automatically turns OFF after 10 minutes of keyboard inactiv-

ity, but can be turned OFF at any time by again pressing the LIGHT button.

4.5 Using the Probe

A rigid stainless steel probe with handle, connected to a flexible hose with
integral water-trap / filter can be used to draw a gas sample into the ana­lyzer from the room, grilles, diffusers, and furnace flues.

The hose and probe assembly can be detached from the analyzer when the
operator desires to sample without the probe.

4.6 Saving Test Data in Memory

(Model 105/110/120/125)

Up to 10 individual sets of test data can be saved in memory as follows:

Note: When memory is full, the next reading saved will over-

write the oldest reading.

Note: The analyzer's setup information as entered in Sec-

tion 3.5 is stored along with the test data. For example,
temperatures stored in °C are recalled and printed in °C even
if the analyzer is currently set up for °F.

1. If the analyzer is in its Run Mode, press the HOLD button twice to

enter the Print/Memory Menu Screens. If the analyzer is already in

its Hold Mode, press the HOLD button only once. The first menu item

displayed is the Print Screen.

24

Instruction 0024-9395

Fyrite Pro

2. Press the ▼ button once to display the Save Screen. The number

shown in this screen represents the memory location (1 thru 10) to
which the current test data will be saved.

3. Press ENTER to save the test data and return to the Hold Mode, or

press HOLD to return to the Hold Mode without saving.

4.7 Opening and Viewing Saved Test Data

(Model 105/110/120/125)

Perform the following to open and view saved test data:

Note: If no test data has been saved, the option to open the

memory for viewing will not be available.

1. If the analyzer is in its Run Mode, press the HOLD button twice to

enter the Print/Memory Menu Screens. If the analyzer is already in

its Hold Mode, press the HOLD button only once. The first menu item

displayed is the Print Screen.

2. Press the ▲ or ▼ button until the Open Screen is displayed, and

then press ENTER to open the memory locations for viewing. The

number shown in the second screen represents the most recent
memory location where data was stored.

3. Press the ▲ or ▼ button to scroll to the desired memory location,

and then press ENTER to recall the stored data and return to the

Hold Mode. While in the Hold Mode, the recalled data can be viewed
using the ▲ and ▼ buttons, or printed per Section 4.9.

Instruction 0024-9395

25

Fyrite Pro

4.8 Printing Test Data

Tip: To avoid printing errors, it is important to select the

correct protocol per Section 3.5.8 before saving data.

Turn ON the printer. Refer to the printer’s instruction manual for detailed
operation and maintenance information.

If not already done, set the printer parameters as follows:

• Data: 8 bits • Parity: None

• Baud: 9600 • Handshaking: X-on/X-off

Align the printer with the top of the analyzer as shown in Figure 4-1.

The next step in the printing procedure depends on the model of the ana­lyzer, and whether the operator desires to print only the current test data,
or all stored test data starting with the most recent. Perform the appropri­ate procedure below:

Model 100 – Print Current Test Data

With the analyzer in its Run Mode, begin printing by pressing the HOLD

button twice.

Model 105/110/120/125 – Print Current Test Data

1. With the analyzer in its Run Mode, press the HOLD button twice to

display the Print Screen.

2. Press ENTER to start printing.

Model 105/110/120/125 – Print All Test Data

1. With the analyzer in its Run Mode, press the HOLD button twice

to display the Print Screen. Then press the ▲ button to display the
Print All Screen.

2. Press ENTER to start printing.

26

Instruction 0024-9395

60°

max.

45 cm

(18 in.)

max.

Fyrite Pro

BACHARACH, INC.
FYRITE PRO ANALYZER

=======================

DATE: 8/20/2003
TIME: 2:45 PM

FUEL: (F1)Natural Gas

EFFICIENCY 82.6 %
EXCESS AIR 21.3 %
STACK TEMP 374 °F
PRIMARY TEMP 68.0 °F
DELTA TEMP 306 °F
O2 4.0 %
CO2 9.5 %
CO 12 ppm
CO AIR FREE 15 ppm

Draft -0.25 WC

ENTER

HOLD

LIGHT

I/O

COMMENTS:

Notes: When a calculation cannot be

made because of improper data (i.e.,
oxygen level above 17.9%), four dashes
“- - - -” appear in place of the calculated
value on both the screen and printout.

When one or more of the following
sensors are not installed, their
associated values do not print:

Oxygen Sensor:

Fuel, Efficiency, Excess Air, Stack

Temp, Primary Temp, O2, CO2, and
CO Air Free

CO Sensor:

CO, and CO Air Free

Draft Sensor:

Draft

Figure 4-1. Printer Alignment & Sample Printout

Instruction 0024-9395

Either Thermocouple:

Delta Temp

27

Fyrite Pro

4.9 Clearing Saved Test Data (Model 105/110/120/125)

Clear all saved test data as follows:

Note: If no test data has been saved, the option to clear

memory will not be available.

1. With the analyzer in its Run Mode, press the HOLD button twice to

display the Print Screen.

2. Press the ▲ or ▼ button to scroll to the Clear Screen, and then press

ENTER to display the Clear All Screen.

3. Press ENTER again to clear memory and return to the Hold Mode, or
press HOLD to return to the Hold Mode without clearing memory.

4.10 Turning OFF the Analyzer & CO Purge

Press the I/O button to turn OFF the analyzer. The unit will count down

from 5 before turning OFF, thus allowing time for the operator to abort the

turn OFF process by press ing the ENTER button.

If a high CO level is detected at turn OFF, the unit will remain ON with
its pump running and display “PUrG CO”. The countdown from 5 will not
begin until the detected CO level drops below 50 ppm. Although not recom-

mended, the purging process can be bypassed by pressing the I/O button a

second time.

28

Instruction 0024-9395

Fyrite Pro

4.11 Resetting the Microprocessor

If the analyzer ‘locks up’ and cannot be turned OFF, reset the microproces­sor by removing one of the batteries for 5 seconds.

4.12 Run Mode Screens

Figures 4-2A thru 4-2E show the order in which the screens are displayed

by pressing the ENTER and ▲▼ buttons after the analyzer warms-up and

enters its Run Mode.

The top screen in each figure is the one that appears immediately after the
analyzer completes its warm-up cycle.

Refer to Section 4.13 for a detailed description of each screen.

CO

CO

9

PPM

Figure 4-2A. Model 100 Run Mode Screen

CO &
Draft

Draft Zero

ppmCO

WC

WC

Figure 4-2B. Model 105 Run Mode Screens

Instruction 0024-9395

29

Fuel Select:

F1 = Natural Gas
F2 = Oil #2
F3 = LPG
F4 = Kerosene

Fyrite Pro

ENTER

U

F

E

F1

F1

L

O

2

Ambient /
Combustion Air
Temperature

Stack
Temperature &
Efficiency

&

CO

2

Excess Air

O

2

AMBIENT F1

EFF

7

5

46

5

STACK F1

0

787

CO

2

9

251

EXCESS AIR

.

.

2

0

.

F1

.

2

.

%

°F

°F

%

%

Figure 4-2C. Model 110 Run Mode Screens

30

Instruction 0024-9395

Fuel Select:

F1 = Natural Gas
F2 = Oil #2
F3 = LPG
F4 = Kerosene

CO &
O

2

Fyrite Pro

ENTER

U

F

E

F1

F1

CO

O

2

46

L

9

.

PPM

%

CO Air Free

Ambient /
Combustion Air
Temperature

Stack
Temperature &
Efficiency

&

CO

2

Excess Air

CO

12

FREE

AIR

AMBIENT F1

7

5

STACK F1

5

EFF

00

787

CO

2

9

251

EXCESS AIR

F1

.

2

.

F1

.

2

.

PPM

°F

°F

%

%

Figure 4-2D. Model 120 Run Mode Screens

Instruction 0024-9395

31

Fuel Select:

F1 = Natural Gas
F2 = Oil #2
F3 = LPG
F4 = Kerosene

CO & O

CO Air Free

2

Fyrite Pro

ENTER

U

F

E

F1

F1

CO

O

2

CO

AIR

46

12

FREE

L

9

.

F1

PPM

%

PPM

Ambient /
Combustion Air
Temperature

Temperature
Differential

Stack
Temperature &
Efficiency

&

CO

2

Excess Air

CO &
Draft

AMBIENT F1

7

5

STACK F1

5

EFF

0

787

CO

2

92

251

EXCESS AIR

F1

CO

.

004

.

2

0

.

F1

.

.

9

°F

F1

°F

°F

%

%

PPM

7#

Draft Zero

Figure 4-2E. Model 125 Run Mode Screens

32

2

7#

E

Instruction 0024-9395

Fyrite Pro

4.13 Screen Descriptions

4.13.1 Warm-Up Screens

As soon as the analyzer is turned ON, a series of Warm-Up Screens
are dis played. These screens show the analyzer’s model number (Pro
100/105/110/120/125), the unit’s software revision, and finally the remain­ing warm-up time counted down from either 10 or 60 seconds. If an O
sensor is installed, then its current output level is also displayed. The 60
second countdown only occurs when the analyzer contains an O

sensor,

2

or if the analyzer contains a CO sensor that has been set up for auto zero
(refer to Section 3.5.3). At the end of warm-up, the analyzer’s first display
screen appears (refer to Section 4.12).

2

Note: If any errors were de tect ed during warm-up, the

Sensor Error Screen (Section 4.13.13) is displayed.

Tip: An O

error will occur when the oxygen sensor’s output

2

drops to between 80 and 90. Consider replacing the oxygen
sensor when its output level drops below 100.

4.13.2 CO Screen (Model 100)

The CO Screen is displayed after warm-up and shows the current CO level
in ppm. If the probe is being used, insert the probe tip into the area to be
sampled.

Front Panel Button Functions:

▲ – No effect
▼ – No effect

HOLD – Freezes display (press ENTER to unfreeze)
ENTER – Restarts testing after the HOLD button was pressed
LIGHT – Toggles backlight ON/OFF

I/O – Turns analyzer OFF (5 second delay)

Instruction 0024-9395

33

Fyrite Pro

4.13.3 CO & Draft Screen (Model 105/125)

The CO reading is a measurement of how much carbon monoxide in ppm
is present in the flue-gas stream. Note, however, that the amount of CO
dis played may be diluted by secondary air (refer to Section 4.13.12 CO Air
Free Screen).

The draft display is the difference between the pressure at the analyzer’s
“+” port and the pressure at the “–” port when using probe model 24-7266.

Front Panel Button Functions:

▲ – Displays next screen (refer to Section 4.12)
▼ – Displays previous screen (refer to Section 4.12)

HOLD – Freezes display (press ENTER to unfreeze)
ENTER – Hold for 2 seconds to display Fuel Screen (Model 125)
LIGHT – Toggles backlight ON/OFF

I/O – Turns analyzer OFF (5 second delay)

4.13.4 Draft Zero Screen (Model 105/125)

The Draft Zero Screen allows the user to manually zero the draft channel
when the pressure reading is anything other than zero when measuring
ambient room pressure. To zero the draft channel, remove all tubing from

the analyzer’s “+” and “–” ports and press the ENTER button.

Front Panel Button Functions:

▲ – Displays next screen (refer to Section 4.12)
▼ – Displays previous screen (refer to Section 4.12)

HOLD – Freezes display (press ENTER to unfreeze)
ENTER – Zeros the draft channel, and returns to the screen containing

the draft reading.

LIGHT – Toggles backlight ON/OFF
I/O – Turns analyzer OFF (5 second delay)

34

Instruction 0024-9395

Fyrite Pro

4.13.5 Fuel Screen (Model 110/120/125)

The Fuel Screen is displayed after warm-up, and is where an operator
chooses which fuel is to be used by the analyzer to calculate com bus tion
efficiency. Press ing the ▲ or ▼ button scrolls the dis play through the fuel

codes. Pressing ENTER selects the dis played fuel and places the analyzer

into its Run Mode. Note that the fuel code will be dis played in the top right
corner of all screens while in the Run Mode.

Fuel Codes:

F1 = Natural Gas F3 = LPG
F2 = Oil #2 F4 = Kerosene

Front Panel Button Functions:

▲ – Displays next fuel code
▼ – Displays previous fuel code

ENTER – Go to Run Mode (refer to Section 4.12)
HOLD – No effect
LIGHT – Toggles backlight ON/OFF

I/O – Turns analyzer OFF (5 second delay)

4.13.6 O2 Screen (Model 110)

.

The O
flue-gas stream.

Front Panel Button Functions:

Screen shows the measured percentage of oxygen present in the

2

▲ – Displays next screen (refer to Section 4.12)
▼ – Displays previous screen (refer to Section 4.12)

HOLD – Freezes display (press ENTER to unfreeze)
ENTER – Hold for 2 seconds to display Fuel Screen
LIGHT – Toggles backlight ON/OFF

I/O – Turns analyzer OFF (5 second delay)

4.13.7 CO & O2 Screen (Model 120/125)

Instruction 0024-9395

35

Fyrite Pro

The CO reading is a measurement of how much carbon monoxide in ppm
is present in the flue-gas stream. Note, however, that the amount of CO
dis played may be diluted by secondary air (refer to Section 4.13.12 CO Air
Free Screen).

The O2 reading is the measured percentage of oxygen present in the flue­gas stream.

Front Panel Button Functions:

▲ – Displays next screen (refer to Section 4.12)
▼ – Displays previous screen (refer to Section 4.12)

HOLD – Freezes display (press ENTER to unfreeze)
ENTER – Hold for 2 seconds to display Fuel Screen
LIGHT – Toggles backlight ON/OFF

I/O – Turns analyzer OFF (5 second delay)

4.13.8 CO2 & Excess Air Screen (Model 110/120/125)

The CO2 reading is a calculation of the percentage of carbon dioxide that is
being produced by the combustion process.

Excess Air is a calculation of the percentage of extra air that was avail able
in the combustion chamber above the theoretical amount needed for perfect
combustion.

Front Panel Button Functions:

▲ – Displays next screen (refer to Section 4.12)
▼ – Displays previous screen (refer to Section 4.12)

HOLD – Freezes display (press ENTER to unfreeze)
ENTER – Hold for 2 seconds to display Fuel Screen
LIGHT – Toggles backlight ON/OFF

I/O – Turns analyzer OFF (5 second delay)

36

Instruction 0024-9395

Fyrite Pro

4.13.9 Temperature Differential Screen (Model 125)

The Temperature Differential reading is the measured difference between
the temperatures being measured by the T-STACK and T-AIR thermo­couples.

Front Panel Button Functions:

▲ – Displays next screen (refer to Section 4.12)
▼ – Displays previous screen (refer to Section 4.12)

HOLD – Freezes display (press ENTER to unfreeze)
ENTER – Hold for 2 seconds to display Fuel Screen
LIGHT – Toggles backlight ON/OFF

I/O – Turns analyzer OFF (5 second delay)

4.13.10 Stack Temperature & Efficiency Screen

(Model 110/120/125)

The STACK reading is the temperature mea sured at the tip of the probe.

The EFF (Efficiency) reading is a cal cu la tion of what percentage of energy
present in the fuel was con vert ed into usable heat.

Front Panel Button Functions:

▲ – Displays next screen (refer to Section 4.12)
▼ – Displays previous screen (refer to Section 4.12)

HOLD – Freezes display (press ENTER to unfreeze)
ENTER – Hold for 2 seconds to display Fuel Screen
LIGHT – Toggles backlight ON/OFF

I/O – Turns analyzer OFF (5 second delay)

Instruction 0024-9395

37

Fyrite Pro

4.13.11 Ambient Air Temperature Screen

(Model 110/120/125)

The AMBIENT reading is the combustion-air temperature in either °F or
°C that is used for efficiency calculations. This temperature is measured
by either the T-AIR thermocouple on a continuous basis ( Model 125), or by
the T-STACK thermocouple during start-up (Model 110/120/125). If neither
thermocouple is installed when the analyzer is turned ON, then this
temperature reading comes from a temperature sensor located inside the
analyzer. Refer to Section 4.2.1.

Front Panel Button Functions:

▲ – Displays next screen (refer to Section 4.12)
▼ – Displays previous screen (refer to Section 4.12)

HOLD – Freezes display (press ENTER to unfreeze)
ENTER – Hold for 2 seconds to display Fuel Screen
LIGHT – Toggles backlight ON/OFF

I/O – Turns analyzer OFF (5 second delay)

4.13.12 CO Air Free Screen (Model 120/125)

The CO AIR FREE reading is a calculation of the exact ppm con cen tra tion
of car bon mon ox ide at the flame if oxygen were 0.0% in accordance with
ANSI standard Z21.1.

CO

Air Free

CO x 20.9

=

20.9 – O

2

Front Panel Button Functions:

▲ – Displays next screen (refer to Section 4.12)
▼ – Displays previous screen (refer to Section 4.12)

HOLD – Freezes display (press ENTER to unfreeze)
ENTER – Hold for 2 seconds to display Fuel Screen
LIGHT – Toggles backlight ON/OFF

I/O – Turns analyzer OFF (5 second delay)

38

Instruction 0024-9395

Fyrite Pro

4.13.13 Sensor Error Screen (Model 100/105/110/120/125)

An O
warm-up cycle that the oxygen sensor’s output is too low for it to be usable.
However, in the extreme condition when the O
sor error will not occur. Instead, the O
the O

sensor error is displayed if the analyzer determines during the

2

sensor has no output, a sen-

2

reading will be 0.0 as displayed in

2

Screen or the CO & O2 Screen.

2

Tip: To avoid O

ing the O

sensor when its output level drop below 100 as

2

errors from occurring, consider replac-

2

displayed during warm-up (refer to Section 4.13.1).

When the CO channel is set up for Auto Zero (refer to Sec tion 3.5.3), a
CO sensor error will occur if the detected carbon mon ox ide level is above
50 ppm during the warm-up cycle. Note that if the CO chan nel is set up for
manual calibration, the analyzer does not auto-zero the CO sensor during
warm-up, and thus does not generate a CO sensor error when the analyzer
is turned ON in an atmosphere containing a high back ground level of CO.

Do the following before replacing a suspected spent or defective sensor:

1. Turn OFF the analyzer and turn it back ON in an area of fresh air
(con tain ing 20.9% O2 and no CO).

2. Perform the Oxygen Sensor Zero procedure (Section 5.5) and, if ap­plicable, the CO Sensor Zero & Calibration procedure (Sec tion 5.6).

3. If Steps 1 & 2 do not eliminate the error condition, re place sensor(s)
(refer to Sections 5.9 or 5.10).

Instruction 0024-9395

39

Fyrite Pro

Notes:

40

Instruction 0024-9395

Fyrite Pro

5.0 CALIBRATION & MAINTENANCE

Important: Fresh batteries should be installed, and the unit

allowed to sta bi lize at room temperature for at least two
hours before proceeding with calibration. To main tain ac­ cu ra cy as listed in the Technical Characteristics Sec tion of
this manual, the standards used must be at least four times
as accurate as the stated accuracy of the Fyrite Pro.

5.1 Entering the Calibration Mode and
Testing the Display Segments

1. With the analyzer turned OFF, place the unit in fresh, ambient air;

then press and hold down the ENTER button.

2. Press the I/O button and release it. Observe that all LCD seg ments

are turned ON.

3. Release the ENTER button. Observe the unit’s model number and

soft ware version are displayed. The word “CAL” is then displayed
while the unit warms up counts down from 60 seconds.

At the end of 60 seconds, the first calibration screen is displayed.

Note: The order in which the calibration screens are displayed

depends on whether the CO channel is set up for automatic or
manual zero (Section 3.5.3).

Calibration Screen Display Order

CO Auto Zero: Ambient, TA, Stack, O
CO Manual Zero: CO, Pressure, Ambient, TA, Stack, O

, CO, Pressure

2

2

Instruction 0024-9395

41

Fyrite Pro

5.2 Ambient Temperature Calibration

(Model 110/120/125)

Material Required: Calibrated Thermometer

Procedure:

1. Enter the Calibration Mode as described in Section 5.1. Observe
that “AMBIENT” will appear at the top of the display; if not, re-

peatedly press ENTER until “AMBIENT” is dis played.

2. Use the ▲ and ▼ buttons to set the displayed value to match the
reading of a calibrated thermometer at room temperature.

3. Press ENTER to store the displayed value and move to the next
cal i bra tion screen, or hold down ENTER for 2 seconds to store the
displayed value and enter the Run Mode, or press the I/O button to

exit the Cal i bra tion Mode and turn OFF the an a lyz er with out sav­ing the changes.

5.3 Combustion Air Thermocouple
Calibration (Model 125)

Material Required: Thermocouple Simulator

Procedure:

1. Attach the thermocouple simulator to the Combustion Air Ther mo ­cou ple connector on the analyzer (T-AIR, see Figure 3-2).

2. Enter the Calibration Mode as described in Section 5.1. Then re-

peatedly press the ENTER button until “TA” appears at the top of

the display.

42

Instruction 0024-9395

Fyrite Pro

3. Set the simulator to 32.0 °F (0 °C); then use the ▲ and ▼ buttons to
set the dis played value to match the simulator’s value.

4. Set the simulator to 212.0 °F (100 °C); then use the ▲ and ▼ but-
tons to adjust the dis played value to match simulator’s value.

5. Repeat Steps 3 and 4 as necessary until the unit is reading cor­ rect ly at both temperatures.

6. Press ENTER to store these calibration values and move to the next
cal i bra tion screen, or hold down ENTER for 2 seconds to store these
calibration values and enter the Run Mode, or press the I/O button

to exit the Cal i bra tion Mode and turn OFF the an a lyz er with out
saving the changes.

7. Remove thermocouple simulator from analyzer.

5.4 Stack Thermocouple Calibration

(Model 110/120/125)

Material Required: Thermocouple Simulator

Procedure:

1. Attach the thermocouple simulator to the Stack Ther mo cou ple con­nector on the analyzer (T-STACK, see Figure 3-2).

2. Enter the Calibration Mode as described in Section 5.1. Then re-

peatedly press the ENTER button until “STACK” appears at the top

of the display.

3. Set the simulator to 32 °F (0 °C); then use the ▲ and ▼ buttons to
set the dis played value to match the simulator’s value.

4. Set the simulator to 572 °F (300 °C); then use the ▲ and ▼ buttons
to adjust the dis played value to match simulator’s value.

5. Repeat Steps 3 and 4 as necessary until the unit is reading cor­ rect ly at both temperatures.

Instruction 0024-9395

43

Fyrite Pro

6. Press ENTER to store these calibration values and move to the next
cal i bra tion screen, or hold down ENTER for 2 seconds to store these
calibration values and enter the Run Mode, or press the I/O button

to exit the Cal i bra tion Mode and turn OFF the an a lyz er with out
saving the changes.

7. Remove thermocouple simulator from analyzer.

5.5 Oxygen Sensor Zero (Model 110/120/125)

Material Required: • Cylinder of 100% Nitrogen, P/N 9550-0049

• Calibration Kit, P/N 0024-7059

Procedure:

1. With the analyzer sampling fresh air, enter the Calibration Mode as

described in Section 5.1. Then repeatedly press the ENTER button

until “O

” appears in the lower-left side of the display.

2

2. Allow pump to run and sample fresh air for at least 1 minute.

3. Use the ▲ and ▼ buttons to set the display to 20.9%.

4. Set up the Calibration Kit with 100% N

as de scribed in the in struc -

2

tions supplied with the kit.

5. Connect the tubing of the Calibration Kit to the GAS inlet of the
an a lyz er; then adjust the regulator for ap prox i mate ly 2 SCFH of
excess flow (see Figure 5-1).

6. After the analyzer has stabilized (2 to 3 minutes,) use the ▲ and ▼
buttons to set the displayed value to 0.0%.

7. Disconnect tubing from analyzer and turn off gas flow.

8. Allow the analyzer’s pump to run until the O

20.9. If necessary, use the ▲ and ▼ buttons to readjust the reading
to 20.9. Repeat Steps 3 thru 7 to verify the zero adjustment.

44

reading returns to

2

Instruction 0024-9395

Fyrite Pro

9. Press ENTER to store the new calibration values and move to the
next cal i bra tion screen, or hold down ENTER for 2 seconds to store

the new calibration values and enter the Run Mode, or press the

I/O button to exit the Cal i bra tion Mode and turn OFF the an a lyz er

with out saving the changes.

5.6 CO Sensor Zero & Calibration

(Model 100/105/120/125)

Material Required: • Cylinder of 100 ppm (P/N 0051-1994) or

500 ppm (P/N 0024-0492) CO calibration gas

• Calibration Kit, P/N 0024-7059

To improve the accuracy of the CO reading, we suggest that if the analyzer
will be primarily used for flue gas testing, then calibrate using 500 ppm
CO. If the analyzer, however, will be pri ma ri ly used for ambient testing,
then calibrate using 100 ppm CO.

Procedure:

1. With the analyzer sampling fresh air, enter the Calibration Mode as

described in Section 5.1. Then repeatedly press the ENTER button

until “CO” appears in the upper-left side of the display.

2. Allow the pump to run and sample fresh air for at least 1 minute.

3. Use the ▲ and ▼ buttons to set the displayed value to 0 ppm.

4. Do one of the following:

a. End this procedure and save the new zero value by holding down

the ENTER button for 2 seconds; after which, the analyzer enters

its Run Mode.

b. Continue with Step 5 to span the CO sensor on a known concen-

tration of carbon monoxide.

5. Set up the Calibration Kit with 100 or 500 ppm CO as de scribed in
the in struc tions supplied with the kit.

Instruction 0024-9395

45

Fyrite Pro

6. Connect the tubing of the Calibration Kit to the GAS inlet of the an­ a lyz er. Note that the gas fitting (Item 6) is only required on Fyrite
Pro Models 105 and 125.

7. Adjust the regulator for ap prox i mate ly 2 SCFH of excess flow (see
Figure 5.1).

8. After the analyzer has stabilized (2 to 3 min utes), use the ▲ and
▼ buttons to set the displayed value to match the CO con cen tra tion
stamped on the gas cylinder.

9. Press ENTER to store the new calibration values and move to the
next calibration screen, or hold down ENTER for 2 seconds to store

the new calibration values and enter the Run Mode, or press the

I/O button to exit the Calibration Mode and turn OFF the analyzer

without saving the changes.

10. Disconnect tubing from analyzer and turn off gas flow.

46

LEAVE TOP
PORT OPEN

23 4 5

1

Parts Shown:

1. Gas Cylinder

2. Regulator*

3. Tubing*

4. Tee*

5. Flowmeter*

6. Fitting, Gas*
* Contained in Calibration Kit

3

Figure 5-1. Calibration Kit Hookup

Instruction 0024-9395

6

Fyrite Pro

5.7 Draft Calibration (Model 105/125)

Material Required: • Bellows

• Micromanometer
Range: ±8 in. H
Accuracy: ±0.01 in. H

Procedure:

1. Set the draft units to “WC” per Section 3.5.4.

2. Enter the Calibrate Mode per Section 5.1, and then

press the ENTER button until “WC” is displayed.

O column (±20 mb)

2

O column (±20 mb)

2

3. If necessary, zero the draft channel by using the ▲

.

and ▼ buttons to adjust the reading to 0.00 ±0.02.

4. Set up the analyzer and its test equipment per Figure 5-2.

5. Use the bellows to apply a positive pressure of 4.00 in. H

O, and then use

2

the ▲ and ▼ buttons to adjust the displayed value to match the
reading on the manometer.

6. Remove pressure and repeat Steps 3 thru 5 until the desired read­ings are obtained.

7. Press ENTER to store the new calibration values and move to the
next calibration screen, or hold down ENTER for 2 seconds to store

the new calibration values and enter the Run Mode, or press the

I/O button to exit the Calibration Mode and turn OFF the analyzer

without saving the changes.

Parts Shown:

Figure 5-2. Draft Calibration Equipment

Instruction 0024-9395

1. Tubing*

2. Tee*

3. Fitting, “+” Pressure Port
* Contained in Calibration Kit

2

1

1

Bellows

47

Fyrite Pro

5.8 Water Trap / Filter Maintenance

The Water Trap / Filter Assembly removes water con den sate from the gas
sam ple, and also prevents soot from con tam i nat ing the internal com po­ nents of the analyzer.

Drain the water condensate after every test.

Procedure:

1. Disassemble the trap (see Figure 5-3).

2. Pour out all water condensate; then reassemble the trap.

Replace the Filter Element when dirty.

Material Required: • Filter Element, P/N 0007-1644

• Small Flat Blade Screwdriver

Procedure:

1. Disassemble the trap (see Figure 5-3).

2. Remove and discard old filter.

3. Install new filter and reassemble trap.

Pull apart using a slight
twisting motion

Pry apart filter chamber using
a small flat-blade screwdriver
inserted into notch

WATER TRAP
CHAMBER

FILTER
CHAMBER

FILTER ELEMENT

Figure 5-3. Water Trap / Filter Assembly

48

“A” “B”

When reassembling
the trap, make sure
that surfaces “A” and
“B” are in contact.

Instruction 0024-9395

Fyrite Pro

5.9 O2 Sensor Replacement (Model 110/120/125)

Be sure to perform all of the checks listed in Sec tion 4.13.13 to ensure that
the O

Material Required: • Oxygen Sensor, P/N 0024-8106

• #1 Phillips Screwdriver

Procedure:

sensor needs to be replaced.

2

1. Disassemble the analyzer as follows:

a. Remove the battery cover and the batteries, uncovering one of

the cover hold-down screws.

b. Remove and set aside all four cover hold-down screws.

c. With the analyzer on its back, remove the front cover, laying it

face down to the left of the body.

d. Carefully remove the circuit board, slipping off the battery con-

nec tor on top, and then laying the circuit board face down in the
top cover.

2. Slip off the oxygen sensor’s electrical con nec tor from the circuit
board. Then push down; twist counterclockwise; then pull the oxy­gen sensor out of its socket (see Figure 5-4).

Tip: To obtain a better grip on the oxygen sensor, it may be necessary

to remove the screw that secures the sensor socket to the case.

3. Using the old sensor as a guide, remove the paper backing from the
new sensor gasket contained in the re place ment kit, and adhere it to
the new sensor.

4. Dispose of the old oxygen sensor in a proper manner (see the in­ struc tion sheet that comes with the new sensor).

5. Mount the new oxygen sensor in its socket. If the sensor socket was
removed in Step 2, re-attach it to the case.

6. Plug the oxygen sensor’s electrical connector into the printed circuit
board (observe polarity, see Figure 5-5), and then reassemble the
analyzer.

Note: The sensor may take several hours to sta bi lize after

being connected to the printed circuit board.

Instruction 0024-9395

49

Fyrite Pro

5.10 CO Sensor Replacement

(Model 100/105/120/125)

Be sure to perform all of the checks listed in Sec tion 4.13.13 to ensure that
the CO sensor needs to be replaced.

Material Required: • CO Sensor, P/N 0024-7265

• CO Sensor Gasket, P/N 0024-1112

• #1 Phillips Screwdriver

Procedure:

1. Disassemble the analyzer as follows:

a. Remove the battery cover and the batteries, uncovering one of

the cover hold-down screws.

b. Remove and set aside all four cover hold-down screws.

c. With the analyzer on its back, remove the front cover, laying it

face down to the left of the body.

d. Carefully remove the circuit board, slipping off the battery con-

nec tor on top, and then laying the circuit board face down in the
top cover.

2. Gently pull CO sensor out of its socket (see Figure 5-5).

3. Properly dispose of the old CO sensor (see the in struc tion sheet that
comes with the new sensor).

4. It is recommended that the CO sensor gasket be re placed at the
same time as the sensor. Remove the old gasket and discard. Re­move the paper backing from the new gasket and adhere it to the
case in the same position as the old one.

Important: Ensure that the new gasket does not restrict the

inlet and exhaust holes in the case.

5. Plug the new CO sensor into its socket.

6. Reassemble the analyzer.

50

Instruction 0024-9395

Fyrite Pro

5.11 Pump Assembly Replacement

Material Required: • Pump, P/N 0024-3048

• #1 Phillips Screwdriver

Procedure:

1. Disassemble the analyzer as follows:

a. Remove the battery cover and the batteries, uncovering one of

the cover hold-down screws.

b. Remove and set aside all four cover hold-down screws.

c. With the analyzer on its back, remove the front cover, laying it

face down to the left of the body.

d. Carefully remove the circuit board, slipping off the battery con-

nec tor on top, and then laying the circuit board face down in the
top cover.

2. Slip off the pump motor’s electrical connector from the circuit board.

3. Unscrew the pump’s hold down clamp and remove it from the pump
(see Figure 5-4). Make note of how the pump wiring is routed.

4. Make note of how the tubing connects to the pump; then care ful ly
remove tubing from pump.

5. Remove the old pump and discard.

6. Install the new pump and reinstall the tubing, taking care not to
pinch or crimp the tubing. Also be sure pump wiring is routed as
was noted in Step 3.

7. Reassemble the analyzer.

Instruction 0024-9395

51

Fyrite Pro

CO SENSOR
GASKET
(Model 125E only)

PUMP

HOLD
DOWN
CLAMP

OXYGEN SENSOR
& SOCKET

PRESSURE
SENSOR
ON PCB

Figure 5-4. Case Components & Plumbing Schematic

52

Instruction 0024-9395

Fyrite Pro

To
BATTERY

PRESSURE
SENSOR

(RED
WIRE)

(RED
WIRE)

CO
SENSOR
(Model 125E only)

To
OXYGEN
SENSOR

Figure 5-5. PCB Components

Instruction 0024-9395

To
PUMP

(RED
WIRE)

53

Fyrite Pro

Notes:

54

Instruction 0024-9395

Fyrite Pro

6.0 PARTS & SERVICE

6.1 Replacement Parts

Description Part No.

Carbon Monoxide Sensor .................................................................0024-7265

Carbon Monoxide Sensor Gasket .....................................................0024-1112

Oxygen Sensor w/ Gasket ................................................................0024-8106

Oxygen Sensor Gasket ..................................................................... 0024-1111

O-ring, Gas and Draft Connector (Model 105/125):

8 mm OD, Gas Connector .......................................................... 0105-5102

7 mm OD, Pressure Connectors ................................................ 0105-5103

Pump Assembly ............................................................................... 0024-3048

Thermocouple Replacement Kit (for 12" Probe 24-3004) ...............0024-8414

Water Trap / Filter Assembly, Complete .........................................0019-3265

Water Trap / Filter Assembly, Filter Element (pack of 3) ..............0007-1644

6.2 Accessories

6.2.1 Standard Accessories

Battery, “AA” Alkaline ....................................................................0204-0004

Carrying Case ................................................................................. 0024-0865

Instruction Manual ......................................................................... 0024-9395

Probe (12"), Hose, and Water Trap / Filter Assembly:

Model 100 ................................................................................... 0019-7110

Model 110/120 ............................................................................ 0019-7111

Model 105/125 ........................................................................... 0024-3004

Quick Reference Guide .................................................................... 0024-9396

Instruction 0024-9395

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Fyrite Pro

6.2.2 Optional Accessories

AC Adapter (Battery Eliminator) ....................................................0024-1254

Calibration Kit .................................................................................0024-7059

Calibration Gas Cylinder:

100 ppm CO................................................................................ 0051-1994

500 ppm CO .............................................................................. 0024-0492

100% Nitrogen .......................................................................... 9550-0049

Differential Pressure Hose Assembly, 6 ft (Model 105/125) .......... 0024-1103

Printer:
IrDA w/ rechargeable batteries (includes 120 VAC charger)* ..0024-1229

IrDA w/ disposable batteries .....................................................0024-1400

Printer Paper:

1 Roll ......................................................................................... 0006-8733

5 Roll Pack ................................................................................. 0024-1310

Probe Stop w/ Thumbscrew* ............................................................0019-3037

Protective Rubber Boot w/ Magnets* ..............................................0024-1127

Soft Carrying Case ..........................................................................0024-1267

Thermocouple, Second Channel (Model 125):

1 inch .......................................................................................... 0104-1798

10 feet ......................................................................................... 0104-1797

True Spot Smoke Test Set* .............................................................. 0021-7006

Filter Paper, True Spot (40 strips) .............................................0021-0019

* Depending on the analyzer’s model number, this optional

accessory may be supplied as a standard item.

56

Instruction 0024-9395

Fyrite Pro

6.3 Service Centers

Replacement parts and service can be obtained by con tact ing one of the fol­ low ing Bacharach Service Centers:

United States

621 Hunt Valley Circle
New Kensington, PA 15068
Phone: [phone]
Fax: [phone]
Email: [e-mail]

Canada

Bacharach of Canada, Inc.
20 Amber St. Unit #7
Markham, Ontario L3R 5P4 Canada
Phone: [phone]
Fax: [phone]
Email: [e-mail]

Instruction 0024-9395

57

621 Hunt Valley Circle, New Kensington, PA 15068

Ph: 724-334-5000 • Fax: [phone] • Toll Free: 800-736-4666

Website: www.MyBacharach.com • E-mail: [e-mail]

Printed in U.S.A.

Headquarters: