Sierra RED1-HST User manual

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RED1
Models HST, HE1, HE2, HE3, HE4, and HNT
Technical Support and Installation Manual

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Table of Contents
1. OVERVIEW 1
2. BASIC OPERATION 1
2.1 General 1
2.2 Field-of-View 2
2.3 Range 2
2.4 Environment 2
2.5 Configuration 3
2.6 LED operation 4
2.7 Relay Operation 5
3. INSTALLATION 6
3.1 Housing and Conduit 6
3.2 Connection 7
3.3 Testing 8
4. MAINTENANCE 8
4.1 Lens Cleaning 8
5. GENERAL SPECIFICATIONS 9
6. FIGURES 10
Figure 1 -RED1 Exploded View 10
Figure 2 - RED1 Housing Dimensions 10
Figure 3 -RED1 Detector Module (Front) 11
Figure 4 -RED1-HE1 to -HE4 Detector Module (Back) 11
Figure 6 -RED1 Field-of-View 12
Figure 7 -Configuration Switches 13
Figure 8 -RED1-HE1 to -HE4 Wiring 13
Figure 9 -Typical Panel Wiring 14
7. TABLES 15
7.1 Dip Switch Settings 15
7.2 Connectors 16
7.3 Verify/Aux. Relay Configurations 16
7.4 Fault Table 17
7.5 False Alarm Stimuli Table 17
7.6 Detector Response to Fuels Table 17
8. TROUBLESHOOTING 17
8.1 No LED blink or erratic LED blink 18
8.2 Detector Indicates Fault 18
8.3 Device appears to operate normally but will not alarm to a fire. 19

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1. Overview
The RED1 High Speed Detector senses the radiant energy of either a
sudden combustion event or the slower flaming combustion of an average
fire.The detectors covered by this manual use UV, IR, Temperature and
Visible sensors to sense combustion.
Flame detectors usually trigger a relay or output an alarm signal when they
sense a fire.Flame detectors are typically employed if one of the following
applies:
•The threat area requires a fast response.
•There is a severe risk.
•Where other types of detection simply will not or cannot work.
The detector also performs system tests looking for a fault condition that
would impair its ability. Some of the things being checked for include: input
power, sensor circuits, relay circuits, software integrity etc. Some versions
also perform a lens/sensor test to verify sensor operation and general
window cleanliness.
The RED1 detectors have a Fire Relay and a Fault Relay and may have a
Verify Relay and an Aux. Relay. The Fire Verify adds a “field adjustable”
level of certainty to the declaration of a verified fire. The Aux. Relay
activates when the detector determines that the Lens or UV system is not
working properly.
The RED1 detector is mounted in an approved NEMA 4X weather tight
housing. The housing is explosion proof rated for Class I Divisions 1 & 2
Groups B, C, D, Class II Divisions 1 & 2 Groups E, F, G, and Class III
locations. All of the electronics are mounted inside of an aluminum cup to
protect the electronics during installation. All switch settings and indicators
are located on the front of the detector module allowing field adjustments to
be made without removing the detector module from the housing.
With the detector set to maximum sensitivity, it will respond to a 1 square
foot gasoline (heptane) fire on axis at 80 feet in about 5 seconds.
If the "High Speed Disable" switch is turned off, then the detector will
respond to a one-inch-high butane flame at 12 inches in about 50
milliseconds.
The RED1 has user settable sensitivity settings and verify levels.
2. Basic Operation
2.1 General
When the RED1 Detector is powered up, the microprocessor checks the
configuration switch settings, initializes the detector and then executes a
series of self-tests. After the self-test process is completed and all tests
have been passed, the detector is starts looking for a fire.

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All modes of operation are indicated by two LEDs located on the front of
the detector. Normal Mode is indicated by a brief flash of the LEDs
every 8 seconds. In Normal Mode the detector is constantly monitoring
the environment for a fire.
When a fire is detected the RED1 goes into Alarm Mode. If the device is
configured for “Latching” the device will remain in Alarm Mode until
power is removed. If configured for “Non-Latching” the Fire Relay will
reset to normal when the detector cannot determine there is a fire.
The self-test system is continuously monitoring the internal systems. If
the RED1 is not reporting a fire, then when a fault is detected the
detector goes into Fault Mode. In Fault Mode the LEDs will flash a code
indicating the type of fault. A fault indication may mean the device is
unable to detect a fire or that a device has become unreliable. (i.e. a
“Voltage Low” fault) For most faults the detector will return to Normal
Mode when the fault condition is corrected.
2.2 Field-of-View
Optical Flame Detectors must be able to “see” the fire to declare an
alarm. Any obstruction between the detector and the threat area will
impair the detector’s ability to cover the threat area. An obstruction is
anything that is not transparent to the energy being detected by the
sensor elements of the detector. Even objects such as scaffolds and
ladders within the field of view will impact the detector's response.
Ultraviolet and Infrared sensors cannot see through most types of glass
or plastic even if the glass or plastic is visually transparent. For
coverage of a large area the detectors should be located with
overlapping fields of view (see Figure 6). Flame detectors should never
be located so that they are looking down from a ceiling of large enclosed
spaces as products of combustion may stratify in the enclosed volume.
Such stratification may reduce the detector's speed of response.
2.3 Range
The size of fire and type of materials that constitute the threat will affect
the detector’s range. Different materials and environmental conditions
produce different amounts of the radiant energy from the fire that is used
by the detector to “see” the fire. Also, the range of the detector is a
function of the fire size. The RED1 Detector is optimized to detect a 1
sq. ft. gasoline fire on axis within 80 feet when the sensitivity settings set
to maximum.
The RED1 can be set for lower sensitivity using the dipswitches located
on the face of the module.
2.4 Environment
All optical flame detectors sense radiant energy at some frequency or
frequencies within their Field-of-View. Any source that radiates energy
at the same frequency or frequencies used by the detector to sense a
fire may impact the detector’s ability to “see” the fire (see Table Error!
Reference source not found.). Care should be taken to minimize

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radiant energy sources within the detector’s Field-of-View. Because
environments and conditions can impact the performance of the
detector, a trained technician or qualified P.E. should be consulted
before deciding on the location of the devices.
The RED1 may be interfaced to a computer using an interface box. If
there is a question with possible radiant energy sources in an
application, a technician can use a detector interfaced to a computer to
determine the real time radiant energy in the application. This will allow
the technician to determine any problem sources of energy so the
detector can be set properly.
2.5 Configuration
RED1 detectors have field adjustable configuration switches located on
the front face of the detector. The factory settings are shown in italic
text.
2.5.1 Sensitivity
All models of the RED1 detector have several sensitivity settings
available. The sensitivity settings are 20, 40, 60, and 80 feet.
Each setting is optimized to alarm to a 1 sq. ft. gasoline fire within
5 seconds. Switches 1 and 2 are used to control the sensitivity.
The factory default is 80 feet. (SW1 and SW2 are off.)
Note: Different fuels emit energy at differing rates. For example;
a fire involving fuel oil does not emit energy at the same rate as
gasoline.
2.5.2 Verify Control
Models RED1-HE1 to -HE4 have a Verify Relay. The Verify
function is armed when the detector detects a fire and will trigger
when the Verify function has confirmed the fire.
The switches located on the face of the detector allow the user to
select the verify level (Levels 1 to 6), disable the verify function
(Level 7), or have the Verify Relay operate in parallel with the Fire
Relay (Level 0) The factory default is level 0 (SW3, SW4 and
SW5 are off) where the Verify Relay operates in parallel to the
Fire Relay.
The verify level sets the degree of certainty required to declare a
verified fire. Level 1 is the lowest level with the quickest response
(nominally about 5 seconds) and least certainty. Level Six is the
highest level with the slowest response (can exceed 30 seconds)
and the greatest certainty. The verify function enables an
algorithm which evaluates the fire signature over time to
determine the degree of certainty.
2.5.3 Latching Control
The latching controls allow the detector, Fire Relay and Verify
Relay to be set to “Latching” or “Non-Latching”. “Latching” means
the detector/relay will remain on until power is removed from the

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detector. “Non-Latching” means that the detector or relay output
will reset when a flame is no longer being sensed by the detector.
SW6 configures the Fire Relay, SW7 configures the Verify Relay,
and SW8 configures the Detector. The factory defaults are
“Latching” (SW6, SW7, and SW8 are all off).
If the Fire Relay is latching, then the Verify Relay and the Detector
will be latching.
If the Verify Relay is latching, then the Detector will be latching.
2.5.4 High Speed Disable
Switch 9 must be in the OFF position to enable the High Speed
response (50 milliseconds).
2.6 LED operation
The status of the RED1 detector can be determined from the LEDs on
the front of the detector. The LEDs indicate the detectors status (Power
Up, Fault Mode, Normal Mode Fire Mode or Verified Fire Mode).
2.6.1 Power Up
On power up the LEDs will display the Switch Configuration. They
will flash 9 times with the first flash being switch 1 and the last
flash being switch 9. If one LED flashes then the switch is in the
off position. If two LEDs flash, then the switch is in the on
position. Note that switch 7 overrides switch 8 and switch 6
overrides switch 7 (see Latching)
2.6.2 Normal Mode
In Normal Mode the LEDs will flash briefly every 8 seconds.
Whenever the device is in any other mode the “flash every 8
seconds” is suspended until the detector returns to Normal Mode.
2.6.3 Fire Mode
When the RED1 declares a fire both LEDs will come “on”. If the
detector is set to “Latching” the LEDs will remain “on” and stay
“on” until the detector is powered down. If the Fire Relay is set to
“Non-Latching” then the Relay will reset when the fire has not
been detected for a period of time (factory default is 3 seconds).
2.6.4 Verify Mode
When a verified fire is declared the LEDs will blink “off” briefly
every second. If the Verify Relay is set to “Non-Latching” then
the Relay will reset when a verified fire has not been detected for
a period of time (factory default is 3 seconds).
2.6.5 Fault Mode
If the detector has power and is showing a fault then LED1 (the
LED on the left, when facing the detector, with the configuration
switches below the LEDs) will turn “on for 5 seconds and the
LED2 (the right LED) will be “off”. Then LED1 will turn “off” and

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LED2 begin flashing, 1/2 second “on” and 1/2 second “off”, a
number of times. The number of times LED2 flashes indicates
the type of fault. This cycle is repeated until the fault is corrected.
Only the highest numbered fault is indicated. Once a fault is
corrected the next highest fault will be indicated until all faults are
cured. With the exception of fault levels 2 and 3, a fire indication
will override a fault indication. The detector is disabled if a fault 2
or 3 is indicated.
2.7 Relay Operation
RED1 detectors have a Fire Relay and a Fault Relay. Both the Fire and
Fault relays have normally open and normally closed contacts (see
section on Connectors).
The RED1-HE1, -HE2, -HE3 and -HE4 models have a Verify Relay and
an Aux. Relay.
The Verify Mode adds a “field adjustable” level of certainty to the
declaration of a verified fire.
The Aux. Relay activates when the detector determines that the Lens is
not clean enough or the UV system is not working.
2.7.1 Fire Relay
The Fire Relay will energize when the detector declares a fire.
Using switches, the relay may be configured for "Latching" or
"Non-Latching" operation. The Fire Relay connector (J2) provides
2 connections for each of the common, normally open and
normally closed contacts of the Fire Relay.
If the Fire Relay is configured for “Latching” then it will remain
energized until power is removed.
If the Fire Relay is configured for “Non-Latching” (see Latching
Control) then it will reset to normal when the detector no longer
sees a fire for a period of time (factory default is 3 seconds).
2.7.2 Fault Relay
The Fault Relay is normally energized. It will de-energize when a
Fault occurs. This means the Fault Relay will show as a “Fault”
when the detector has no power. The Detector will remain in the
“Fault” state until the detector is powered up and operating
normally. The “J4” connector provides both a normally open
contact and a normally closed contact of the Fault Relay.
2.7.3 Verify Relay
The operation of the Verify Relay will depend on the Model Type
and the switch settings. See sections on Connectors, Latching
Control and Verify Control.
If the Verify Relay is configured for “Latching” then it will remain
energized until power is removed.

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If the Verify Relay is configured for “Non-Latching” then it will
reset to normal when the detector no longer sees a verified fire for
a period of time (factory default is 3 seconds).
Pins on the "J3" connector labeled “Verify In” and “Verify Out”
provide connections for Normally Open contacts on the -HE1 and
-HE3 models or Normally Closed contacts on the -HE2 and -HE4
models.
Model
Verify Relay
Aux. Relay
RED1-HST
N/A
N/A
RED1-HNT
N/A
N/A
RED1-HE1
Open Contacts
Closed Contacts
RED1-HE2
Closed Contacts
Open Contacts
RED1-HE3
Open Contacts
Open Contacts
RED1-HE4
Closed Contact
Closed Contacts
2.7.4 Aux. Relay
The Aux. Relay is energized whenever the detector fails the UV
self test. This fault indicates degradation in the detectors ability to
“see” a fire. Normally, cleaning the lens will clear this fault. This
condition normally occurs when there is an oily lens or a
malfunctioning UV sensor. The Pins on the "J3" connector (see
section on Connectors) labeled “Aux In” and “Aux Out” provide
connections for a Normally Open contact on the -HE2 and -HE3
models or a Normally Closed contact on the -HE1 and -HE4
models.
3. Installation
3.1 Housing and Conduit
3.1.1 Mounting the Housing
The housing is mounted by using the two .3” diameter holes
located in ears on the back of the housing. The two conduit holes
located on the side of the housing are not to be used for
mounting. The detector should be mounted securely to a flat
surface. The mounting location must be strong enough to support
the detectors weight. Although the detector is not vibration
sensitive the detector should not be exposed to excessive
vibration. The detector has been tested to .022” displacement, 10
Hz to 30 Hz sweep cycled at 2 cpm for 4 hours.
3.1.2 Installing the Conduit and Wiring
Mount a “Seal Off” at the housing into the 3/4” NPT conduit
opening(s) located on either side of the housing. Connect the
conduit to the “Seal Off”. If one of the conduit openings is not
used insert a sealing plug into the unused opening. Run the wires
through the conduit, “Seal Off”, and into the housing. The ends of

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the wire should extend several inches (at least 2” to 4”) beyond
the front of the housing base.
3.2 Connection
All connections are made on the back of the RED1 Detector Module.
Remove the housing cover from the housing base. Loosen the two
slotted head captive screws located on the top of the PC board. Lift the
Detector Module out of the housing base. Strip and connect the wires to
the connectors located on the back of the Detector Module.
3.2.1 Power
Power for the RED1 detectors is connected to the J5 connector
(see section on Connectors). Connect the negative wire to one of
the connections labeled “V-”. Connect the positive (24 VDC) wire
to one of the connections labeled “V+”. The two connection
points labeled “V-” and the two “V+” connection points are
connected internally. The “D+” and “D-” connections should be
left open and care should be exercised in not shorting or
connecting power to these pins.
3.2.2 Fire Relay
The Fire Relay connector ("J2") has two connections points for
each connection these connection points are internally connected,
either or both may be used. The Fire Relay connector labeled
“FIRE” has connection points for Normally Open, Normally
Closed, and Common. The Normally Open connections are
labeled “Open”, the Common contacts are labeled “Center”, and
the Normally Closed contacts are labeled “Closed”.
3.2.3 Verify Relay
The Verify Relay connector ("J3") has two connections points for
each connection these connection points are internally connected,
either or both may be used. The Verify Relay connector is
located between the Power and Fire relay connectors. The
connection points are labeled “Verify In” and “Verify Out”. The
Verify relay is configured for Normally Open (-HE1, -HE3), or
Normally Closed (-HE2, -HE4) operation at the factory.
3.2.4 Fault Relay
The Fault Relay connector is labeled “Fault”. The Normally Open
connection is labeled “O”, the Common connection is labeled
“Cen”, and the Normally Closed connection is labeled “C”. The
Fault Relay is normally energized. When the detector has no
power (no power is a fault condition) the Normally Open contact is
closed and the Normally Closed contact is open.
3.2.5 Aux. Relay
The "J3" connector for the Aux. Relay is located between the
Power and Fire Relay connectors. The connection points are
labeled “Aux In” and “Aux Out”. The Aux. Relay is configured for

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Normally Open (-HE2, -HE3), or Normally Closed (-HE1, -HE4)
operation at the factory.
3.3 Testing
The RED1 detector uses ongoing self-test functions which will indicate a
fault if any of the functions fail to pass.
If an end-to-end test is required, the detector may be put into alarm
using butane lighter (Bic) with a flame approximately 1 inch high. Hold
the lighter about 1 foot directly in front of detector's face.The detector
should alarm almost immediately.
A 1 sq. ft. pan with 1 inch of water and 1/8 inch of gasoline (heptane) set
at the maximum distance set by the sensitivity settings may also be
used. The detector should alarm within 5 seconds of the fire becoming
fully involved.
A factory approved test device may be used to put the detector into
alarm.
NOTE: Because of the danger involved with fire testing all safety precautions
must be observed. In addition, should an extinguishing system be
connected, the outputs to the extinguishing system should be
disconnected during testing.
4. Maintenance
All fire protection systems should be inspected in accordance with NFPA 72,
or the appropriate local codes.
The self-test functions incorporated in the detectors reduce the need for
most regular maintenance procedures. If a detector indicates a fault, use the
troubleshooting section of this document.
4.1 Lens Cleaning
The most common fault is a UV Test Fault. Regular cleaning of the
Lens will diminish this type of fault. The frequency of cleaning will
depend on the cleanliness of the area where the detector is installed and
how the detector is mounted. A detector that is pointed down should
require less cleaning than one that is pointed up. An area which has lots
of oil particulates or dust will require more frequent cleaning than one
that is oil and dust free. The frequency of this fault will indicate how
often cleaning is necessary. If the device is failing the “UV Test” too
often, it may be necessary to install a dust shroud, realign the detector,
or change the detector's location.
To clean the lens, wipe the lens surface and grill with a clean lint free
cloth. If more extensive cleaning is required use denatured or Isopropyl
alcohol and a clean lint free cloth. Do not use any silica-based solvents.
(Most common glass cleaners are silica based and should not be used
to clean the lens).

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5. General Specifications
Color: Red or White (order White by
appending a -W to the Model Name)
Input voltage: 15 to 32 Volts DC, typically 24 Volts DC
Current draw:@ 24 Volts DC: 62 ma nominal
Temperature Range: -40°to 85°Celsius operating
-55°to 110°Celsius storage
Relay contacts: 0.5 Amp @ 120 VAC
1.0 Amp @ 24 VDC resistive
Connections: Screw terminals, 14 - 22 AGW wire size
Weight: Approximately 3 pounds
Housing:
Dimensions: 5.4” x 4.8” x 3.7”
Material: Copper free Aluminum with Red or
White epoxy finish
Conduit: Two 3/4-inch NPT
Rating: NEMA 4X, Explosion proof
Class I Divisions 1 & 2 Groups B, C, D
Class II Divisions 1 & 2 Groups E, F, G
Class III
Spectral Response: UV - 185 to 260 nanometers
IR - 0.715 to 3.5 microns
Visible - 480 - 560 nanometers
Sensitivity: There are 4 switch selectable settings
for the detector’s response. These are
20, 40, 60 and 80 feet in response to a
1 sq. ft. gasoline fire within 5 seconds.
Field-of-View: 120°full cone
Approvals: None

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6. Figures
Figure 1
RED1 Exploded View
Figure 2
RED1 Housing Dimensions
Housing Base
Detector Module
Housing Top
Grill

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Figure 3
RED1 Detector Module (Front)
Figure 4
RED1-HE1 to -HE4 Detector Module (Back)
LED 2
CONFIGURATION SWITCHES
SW1 - SW9
MOUNTING SCREW
(2 Locations)
LED 1
FIRE RELAY CONNECTOR J2
VERIFY AND AUX. RELAY
CONNECTOR J3
FAULT RELAY CONNECTOR J4
POWER CONNECTOR J5
Pin 1 on all connectors is
located on this side.

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Figure 6
RED1 Field-of-View
20 ft. 20 ft.40 ft. 40 ft.60 ft. 60 ft.
80 ft.
0
30
15 15
30
80 ft.
45 45
60
75
60
75
Level 1
Level 3
Level 2
Level 4

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Figure 7
Configuration Switches
Figure 8
RED1-HE1 to -HE4 Wiring
SW1
SW2
SW3
SW4
SW5
SW6
SW7
SW8
SW9
SW1 Shown in off
position
SW2 Shown in on
position

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Figure 9
Typical Panel Wiring
RED1 Detectors

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7. Tables
7.1 Dip Switch Settings
7.1.1 Sensitivity
Sensitivity
SW1
SW2
Level
20 Foot
ON
ON
4
40 Foot
OFF
ON
3
60 Foot
ON
OFF
2
80 Foot
OFF
OFF
1
7.1.2 Verify Control (-HE1 to -HE4 Models only)
Verify
Description
SW3
SW4
SW5
Level 0
Verify = Fire
OFF
OFF
OFF
Level 1
Min. Verify (shorter)
ON
OFF
OFF
Level 2
OFF
ON
OFF
Level 3
ON
ON
OFF
Level 4
OFF
OFF
ON
Level 5
ON
OFF
ON
Level 6
Max. Verify (longer)
OFF
ON
ON
Level 7
Verify Disabled
ON
ON
ON
7.1.3 Fire Relay “Latching” Control
Fire Relay
Description
SW6
Latching
Alarm Until Power Down Reset
OFF
Non-Latching
Alarm Until No Fire (.5 to 10 sec.)
ON
7.1.4 Verify Relay “Latching” Control (HE1 to HE4 Models only)
Verify Relay
Description
SW7
Latching
Alarm Until Power Down Reset
OFF
Non-Latching
Alarm Until No Fire (.5 to 10 sec.)
ON
SW6 and SW7 must be ON for the Verify Relay to be
“Non-Latching”.
7.1.5 Detector “Latching” Control
Detector
Description
SW8
Latching
Alarm Until Power Down Reset
OFF
Non-Latching
Alarm Until No Fire
ON
SW6, SW7, and SW8 must be ON for the Detector to be
“Non-Latching”.

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7.1.6 High Speed Disable
High Speed
Description
SW9
Enabled
50 Millisecond Response to a 1” High
Butane Flame at 12 Inches
OFF
Disabled
5 Second Response to Standard Fire
ON
7.2 Connectors
7.2.1 Fire Relay Connector
(J2) Fire Relay
Description
Pin 1 & Pin 2 (Left Most)
Normally Open Side of Relay
Pin 3 & Pin 4 (Middle)
Common or Center Side of Relay
Pin 5 & Pin 6 (Right Most)
Normally Closed Side of Relay
7.2.2 Verify and Aux. Connector
(J3) Verify/Aux.
Description
Pin 1 & Pin 2 (Left Most)
Verify Relay Common Side of Relay
Pin 3 & Pin 4
Verify Relay NO or NC Side of Relay
Pin 5
Aux. Relay Common Side of Relay
Pin 6 (Right Most)
Aux. Relay NO or NC Side of Relay
7.2.3 Fault Connector
(J4) Fault Relay
Description
(Normally Energized
State)
Pin 1 (Left Most)
Normally Closed Side of Relay
Pin 2 (Middle)
Common Side of Relay
Pin 3 (Right Most)
Normally Open Side of Relay
7.2.4 RED1 - Power/Communications Connector
(J5) Power/Communications
Description
Pin 1 & Pin 5 (Left Most)
Power (DC -)
Pin 2 & Pin 6
Communication RS 485 (-)
Pin 3 & Pin 7
Communication RS 485 (+)
Pin 4 & Pin 8 (Right Most)
Power (DC +)
7.3 Verify/Aux. Relay Configurations
Model #
Verify Relay
Aux. Relay
RED1-HE1
Open Contacts
Closed Contacts
RED1-HE2
Closed Contacts
Open Contacts
RED1-HE3
Open Contacts
Open Contacts
RED1-HE4
Closed Contact
Closed Contacts

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7.4 Fault Table
Fault #
Fault Label
Description
1
UV Fault
The UV Sensors Didn’t Detect Enough
UV from the Internal UV Source
2
Configuration Fault
A Failed Program
3
Calibration Fault
Device is Out of Calibration
4
Volt. Low
Input Voltage is Below 15 VDC
5
Photo. Sensor Fault
IR or Visible Sensor Failed to Detect
Internal Test Source
6
Relay Fault
Relay Coil Circuit is Open
7
Volt. High
Input Voltage was Above 32 VDC
8
Temp. Out of Range
Internal Device Temperature Went
Below -40°C or Above 85°C
7.5 False Alarm Stimuli Table
FALSE ALARM RESPONSE
This table shows the detectors ability to tolerate
Modulated and Unmodulated false alarm stimuli.
False Alarm Source Distance Unmodulated Modulated
Resistive Electric
Heater 1320 Watt 6 Feet No Response No Response
Fluorescent Lights (2)
40 Watt Bulbs 6 Feet No Response No Response
Incandescent Light
100 Watt 6 Feet No Response No Response
Direct Sunlight
93 Million Miles
No Response
No Response
7.6 Detector Response to Fuels Table
Detector Response To Various Fuels
Fuel Distance Fire Size Response Time
Heptane
80 Feet
1 Square Foot
Less than 3 Seconds
Silane 50 Feet 18-inch Jet Less than 3 Seconds
Hydrogen 15 Feet 18-inch Jet Less than 5 Seconds
Kerosene
75 Feet
1 square Foot
Less than 5 Seconds
Butane 1 Foot 1-inch High 50 Milliseconds
8. Troubleshooting
The RED1 detector has several built-in self-test mechanisms that verify
function and calibration. The following procedure covers most faults and
problems that may occur during installation or during the course of normal
operation.

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Page 18 of 20
8.1 No LED blink or erratic LED blink
With power connected to the detector the LEDs on the front of the
detector module should begin blinking and blink about every 8 seconds.
If they do not blink or blink in an abnormal fashion:
1. Remove the detector module from the housing.
2. Check voltage at the power connector. Pin 1 should be the
connected to negative, and Pin 4 should be positive. Voltage
should be between 15 and 32 volts DC.
3. If Main power is correct and the detector is not indicating a fault,
then contact the factory for further diagnostic instructions or
instructions on returning the detector for servicing.
8.2 Detector Indicates Fault
Use the fault table to determine what type of fault is occurring and
see appropriate section below to correct. If the corrective actions
listed below do not correct the fault, contact the factory for further
diagnostic instructions or instructions on returning the detector for
servicing.
8.2.1 Fault Type 1 - “UV Test Fault”
Clean the lens and grill per section 4.1. Reset the detector
(remove and replace power). If the fault persists it may indicate a
bad UV tube or UV source tube, factory service is required.
8.2.2 Fault Type 2 - “Configuration Fault”
The program’s sum check is invalid.
Factory service is required.
8.2.3 Fault Type 3 - “Calibration Fault”
The Calibration constants have been corrupted.
Factory service is required.
8.2.4 Fault Type 4 - “Voltage Low Fault”
The input voltage is below 15 VDC. Remove the Detector Module
from the housing. With the detector connected to power,
measure the voltage between Pin 1 and Pin 4 on the Power
connector (J5). The voltage should be between 15 - 32 VDC. If
the voltage is out of range, check external wiring and power
supply. There should not be more than 1 volt of AC ripple at 24
VDC. If the measured voltage is in range and there is no AC
ripple, then factory service is required.
8.2.5 Fault Type 5 - “Photo Sensor Fault”
One of the Photo Sensors (Visible or IR) did not pass the internal
self-test. If both sensors are clean. The fault may be in the
sensors or the self-test circuit. Contact the factory for further
diagnostic information.