Notifier 30-2021-24 User manual

DN-1253 • 10/29/04 — Page 1 of 4
7210-1208:102
GENERAL
The Pyrotector Model 30-2021-24 and Model 30-2021E-24 Ultraviolet
(UV) Flame Detectors are highly sensitive to the ultraviolet radiation
given off by all types of flames, including those produced by flammable
liquids and gases. Since the detector does not respond to normal ambi-
ent light conditions such as sunlight, incandescent or fluorescent light-
ing, it is ideally suited for use as a flame detector in a variety of areas.
The Pyrotector Ultraviolet Flame Detector is a compact unitized pack-
age consisting of a detection tube, encapsulated solid state electronic
circuitry, and a dry-contact Form-C (SPDT) alarm relay. In the event of
an alarm, the relay latches on and an alarm light is illuminated for easy
identification of the unit in the alarm state. The relay is reset by momen-
tarily interrupting power to the unit. A three-second time delay is built in
to minimize false alarms cause by the presence of sparks, lightning, etc.
• Model 30-2021-24 is contained in a general purpose enclosure and
is intended for indoor use only. It mounts on a standard 4" (10.16 cm)
octagonal electrical junction box (not included).
• Model 30-2021E-24 is intended for indoor use and is contained in an
explosion-proof enclosure thatmeetsallrequirementsforNECClass
I Groups C and D; Class II Groups E, F, and G; and Class
III hazardous locations.
• Both models operate on 24 VDC.
THEORY OF OPERATION
The Model 30-2021-24 and Model 30-2021E-24 UV Flame
Detectors operate with a Geiger-Muller-type tube that uti-
lizes an ultraviolet sensitive photocathode within a fused
silica envelope. When exposed to UV radiation, the photo-
cathode emits electrons that ionize the inert gas inside the
tube. This initiates the current flow that produces an alarm
signal.
APPLICATION CONSIDERATIONS
To ensure proper operation of the detector, the viewing window and the
surface of the sensing tube must be kept clean and free of contaminat-
ing films at all times. When cleaning the sensing tube, the user must
exercise caution to apply minimum pressure, thereby minimizing the pos-
sibility of damage to the detector tube.
Cutting and welding operations within the cone of vision of the detector
can generate high levels of UV radiation that can result in actuation of
the detection system. To avoid unwanted alarms, it is suggested that the
detection system be de-energized while these activities are occurring.
It should be noted that ultraviolet detectors will not detect glowing
embers. A high-speed ember detector such as the Model 30-2054-24 or
30-2054A-24 should be used for this type of application.
SPECIFICATIONS
•Operating voltage: 22 to 27 VDC for 24 VDC unit.
•Operating current: STANDBY: [e-mail]:
Model 30-2021E
Model
30-2021-24
100 mA@ 24 VDC.
•Alarm relay contact rating: 1A@26VDC.
•Spectral sensitivity range: 1700 to 2900
angstroms, with peak response at 2100
angstroms.
•Temperature range: –13°F (–25°C) to
+140°F (+65°C).
•Humidity range: up to 90% RH.
Physical Specifications, 30-2021-24:
•Enclosure type: general-purpose painted
steel with protective cage and totally en-
capsulated electronics.
•Dimensions: 4.09" (10.389 cm) diameter;
3" (7.62 cm) deep.
•Weight: 0.75 lb. (0.34 kg).
30-2021-24 and 30-2021E-24
Ultraviolet Flame Detectors
October 29, 2004 DN-1253 • I-207
Section: Conventional Initiating Devices
California
State Fire
Marshal
Pyrotector is a brand name of Detector Electronics Corporation.
This document is not intended to be used for installation purposes. We try to keep our
product information up-to-date and accurate. We cannot cover all specific applications or
anticipate all requirements. All specifications are subject to change without notice.
For more information, contact NOTIFIER. Phone: [phone] FAX: [phone]
12 Clintonville Road, Northford, Connecticut 06472
NOTIFIER® is a Honeywell company.

Page 2 of 4 — DN-1253 • 10/29/04
Physical Specifications, 30-2021E-24:
•Enclosure type: explosion-proof housing
with3/4"(1.905 cm) NPT female entries.NEC
Class I, Groups C and D; Class II, Groups
E, F, and G; Class III.
•Dimensions: 6.76"(17.17cm)x2.75"(6.985
cm) x 4.75" (12.065 cm).
•Weight: 3.75 lbs. (1.7 kg).
DETECTOR SENSITIVITY
The response time of the detector is a function
of the size of the fire, fuel type, and the dis-
tance from the detector to the fire. Smaller fires
and greater distances normally require greater
response times. Figure 1 illustrates the rela-
tive sensitivity of the Model 30-2021-24 Detec-
tor to gasoline fires. Figure 2 shows the rela-
tive sensitivity of the Model 30-2021E-24.
The Model 30-2021E-24 is approximately 10%
less sensitive. For example, a three-second re-
sponse time is achieved at 10 feet (3.048 m)
rather than 12 feet (3.658 m) when detecting a
6" (15.24 cm) gasoline fire.
CONE OF VISION
The Model 30-2021-24 has an 180° cone of vi-
sion. Relative sensitivity is greatest at a view-
ing angle of 45° on either side of the central
axis. At angles greater than 45°, sensitivity de-
creases, as illustrated in Figure 3.For the view-
ingpattern of Model 30-2021E-24,with60° cone
of vision, see Figure 4.
Figure 1: Model 30-2021-24 Detector Sensitivity
Figure 3 (above): Model 30-2021-24
Figure 4 (at right): Model 30-2021E-24
Viewing Patterns for Cone of Vision
1253f1a.wmf, 1253f1b.wmf
Figure 2: Model 30-2021E-24 Detector Sensitivity
1253f2a.wmf, 1253f2b.wmf

DN-1253 • 10/29/04 — Page 3 of 4
INSTALLATION AND WIRING
The Model 30-2021-24 and Model 30-2021E-24 are in-
tended for use in indoor applications. Connection to both
modelsisviacolor-codedwireleadswiththefollowingfunc-
tions:
•RED: +24 V operating power input.
•BLACK: Common 24 V operating power input.
•WHITE: ALARM relay – common.
•BLUE: ALARM relay – normally closed contact.
•ORANGE: ALARM relay – normally open contact.
The Model 30-2021-24 can be mounted on a standard 4"
(10.16 cm) junction box. The junction box should be
mounted securely to a supporting surface such as a wall,
piping, etc. See Figure 5 for 30-2021-24 mounting hole
locations. Connect the external wiring to the detector as il-
lustrated in Figures 7 and 8 (page 4).
To install the Model 30-2021E-24, remove the front cover
from the detector and mount the detector on the junction
box. See Figure 6 for 30-2021E-24 mounting hole loca-
tions. Make the electrical connections as shown in Figures
7 and 8 (page 4). Place the cover back on the detector and
mount it to any flat surface.
Aswivelmountis available for use with the Model 30-2021E
to facilitate installation and orientation and provide easy
adjustment for the viewing field of the detector — order
part number 10-3995. This optional accessory meets the
same NEC requirements for use in hazardous areas as
the detector.
NOTE: Mounting hole diagrams
Figures 5 and 6 are not shown
to scale with each other.
Figure 5: Model 30-2021-24
Mounting Holes
Figure 6:
Model 30-2021E-24
Mounting Holes
MAINTENANCE
To assure maximum detector sensitivity, keep the surface
of the sensor tube free from dirt or other contaminants at
alltimes. Periodically test the sensitivityof the detector using
a controlled flame or a UV test lamp such as the model
W8066.
ENGINEERING SPECIFICATIONS
The unit shall be an open area ultraviolet flame detector
designed to operate on 24 VDC.
It shall have encapsulated electronic circuitry and Form-C
alarm relay contacts. The unit shall have built-in alarm
indication from the front of the detector. It shall respond to
a 12-inch (30.48 cm) diameter gasoline fire in six seconds
when viewed head-on from a distance of 30 feet (9.144 m).
The detector shall not respond to normal ambient light con-
ditions such as sunlight, incandescent, or fluorescent light.
The detector shall have a three-second time delay to spu-
rious responses. Model 30-2021-24 shall have a 180° cone
of vision with the greatest sensitivity at 45° on either side
of the central axis. Model 30-2021E-24 shall have a 60°
cone of vision.
Explosion-proof units shall meet NEC Class I, Groups C
and D; Class II Groups E, F, and G; Class III.
PRODUCT LINE INFORMATION
30-2021-24 Ultraviolet flame detector, 24 VDC, in a gen-
eral-purpose-type enclosure intended for in-
door use.
30-2021E-24 Ultravioletflamedetector,24VDC,contained
in an explosion-proof enclosure.
10-3995 Swivel mount for use with the 30-2021E-24.
1253fig5.wmf 1253fig6.wmf

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WIRING DIAGRAMS
1253fig8.wmf
Figure 8:
Single-Loop Panel Wiring
1253fig7.wmf
Figure 7:
Double-Loop Panel Wiring
KEY:
•RED: +24 V operating power input.
•BLACK: Common 24 V operating power input.
•WHITE: ALARM relay – common.
•BLUE: ALARM relay – normally closed contact.
•ORANGE: ALARM relay – normally open contact.
•F/E: Flame or ember detector.
•PSR: Power supervision relay P 2040 or equivalent.
•EOL: End-of-line device as required by panel.