STI 1229HTR-HAZ User Manual

STI-1229-HAZ Enclosure only
STI-1229HTR-HAZ Enclosure with 110 VAC Heater Option
STI-1229HTR240-HAZ Enclosure with 240 VAC Heater Option

Features:

• Hazardous Classification Class II Groups F&G Div. 2 and Class III locations.

• Maintains operating strobe appliance temperature with external
temperatures to -70°F (-57°C).

• Enclosure tested to NEMA 4X Standards. Equivalent to an IP 66 rating.

• UL/cUL Listed.

• CSFM requires local approval only.

• Protects ADA compliant strobes to UL 1971 Standards.

Operation:

For use in areas where temperature or environmental conditions exceed the
operating range of fire strobe signaling devices. Unit requires 24 VDC
continuous for fan operation and 110 VAC or 240 VAC for heater, as well as
power for strobe operation and supervision for temperature indicator. Fan
runs continuously to maintain uniform temperature. Heater cycles as
required to maintain operating temperature range for listed strobes.

We protect the things that protect you.

Warnings

!

The enclosure is used to protect UL/cUL listed 1638 and 1971 visual
notification appliances at temperatures down to -70˚F (-57˚C). It is the
installer’s responsibility to comply with NEC 70 Articles 502 and 503, NFPA72,
and other applicable fire and electrical codes. Conduit or raceway paths need
to be sealed as near to the enclosure as possible. Installer should have
maintained supervision over the low temperature thermostat. The low
temperature monitoring thermostat makes the circuit at +32°F (0°C) and
clears the circuit at +50°F (+10°C). This listing requires that the fire alarm
supervisory control module be only of the latching type. On the appliance
mounting plate is a label where you should record the installation date. Also
include below the serial number and installation date on the instruction sheet
for quick reference.

Serial Number ____________________________________

Installation Date __________________________________

Installation Notes

1. The enclosure is rated to protect signaling appliances indoors and
outdoors and in areas of direct weather exposure.

2. When covering fire-signaling appliances with the enclosure, some light
loss occurs. Please follow the guidelines listed during installation.

3. Strobe light loss values for respective manufacturers are shown on page

3. To determine the new composite candela value of the use with the
guard refer to the sample calculation shown on page 3 for a
manufacturer’s strobe.

4. Record the manufacturer’s candela value as “A” and the light loss value
as “B” and the assembly value as “C”. Example: A 60 candela strobe with
a 30% light loss transmission value. Value “A” is now 60. Value “B” is
(60 times 30% or 0.30) in this case 18.

5. Now value “C” is value “A” minus value “B” or 60-18 = 42 candela light
source. Now refer to NFPA tables for proper room size that newly
established value “C” will work in. Then submittal installation drawings
must show the composite candela value in this example 42.

6. On a multiple candela value strobe such as 15/30/75 a calculation must
be done for each value and the drawing notation composite value for
each number on the strobe.

7. All field wiring within this enclosure must be rated for a minimum
operating range of 0ºC - 110ºC.

2

Performance Review

Manufacturer Category/Model Light Loss

American Security Equip. Co. Select-a-strobe SL24W-153075 36% Light Loss

Faraday 2700 33% Light Loss

Gentex See note below* 36% Light Loss

System Sensor SS24110ADA 35% Light Loss

*NOTE FOR GENTEX: GES24 may be followed by W, R or P.

Polycarbonate Cleaning Instructions

Rinse with water to remove abrasive dust and dirt. Wash with soap or mild
detergent, using a soft cloth. Rinse once more, then dry with a soft cloth or
chamois. Exercise caution when using water inside enclosure. Make sure unit
is completely dry inside before reassembling. (Do not use razor blades).

Specifications

Polycarbonate Enclosure:

Flammability: UL94 V-2
Wall Thickness: 0.2 in (5.1mm)
NEMA Rating: 4X, indoor and outdoor use
Hazardous Rating: Class II Groups F&G Div. 2

Warranty: Three year guarantee against breakage of

Silicone Laminate Heater:

STI-1229HTR-HAZ 110 VAC 50/60 Hz UL Recognized Component
STI-1229HTR240-HAZ 240 VAC 50/60 Hz UL Recognized Component

100 Watts
Life: @ -10˚C (14˚F) ~ 70˚C (158˚F) 5 Years
Duty Cycle: -40˚F (-40˚C) 53%

-70˚F (-57˚C) 71%

and Class III locations

polycarbonate in normal use (one year on electro
mechanical and electronic components).

Fan:

24 VDC, 90 mA UL Recognized Component
Life: 5 Years Continuous Duty
WARNING: The polarity of the circulating fan is important as it only

!

rotates in one direction with red lead being positive.

Gasket:

Material: Neoprene
Life: 5 Years

3

Installation Instructions

3/

4 in

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(

25m

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1

HEATER ASSEMBLY

HEATER

OVERTEMP SAFETY
THERMOSTAT

HIGH VOLTAGE
TERMINAL BLOCK

PIN 6
PIN 5
PIN 4

2 A FUSE

CONTROL THERMOSTAT

1

2

3

4

5

6

1

2

MOUNT BACKBOX TO WALL (Refer to Fig. 1)

1. Remove appliance heater assembly from back box and set aside.

2. Mount back box in desired location (wall mount only) using the four #10

x 1-1/2” screws and anchors (provided). Drill a 1/4” diameter pilot hole
for plastic anchors at spacing in Fig. 1.

3. Attach conduit hub to a 3/4” NPT nipple and conduit seal fitting to the back
box, top and bottom.

FIGURE 1

Note: A conduit seal fitting must be used on both top and bottom
conduit entries as close to the unit as possible. Use conduit seal Crouse­Hinds 3/4” EYSX 21 or equivalent. Conduit should be installed according
to applicable NEC and local codes.

4. Pull wiring into back box.
Note: High Voltage (110 or 240 VAC) wiring must enter thru bottom

conduit and low voltage and signaling wires must enter thru top conduit
and remain separated per NFPA
70, NEC, and local codes.

HIGH VOLTAGE WIRING (Refer to Fig. 2)

5. Connect high voltage:

Pin 6 AC HOT L-1
Pin 5 Neutral L-2
Pin 4 Ground Ground

110 or 240 VAC power is “OFF”.
Refer to high voltage schematic
diagram on page 6.

110 VAC 240 VAC

Make sure

FIGURE 2

4

LOW VOLTAGE WIRING (Refer to Fig. 3 & Schematic drawings on Page 6)

HEATER ASSEMBLY

FAN

LOW VOLTAGE

TERMINAL BLOCK

LOW TEMP

WARNIN G

FAN POWER

STROBE

POWER

LOW TEMP WARNING

THERMOSTAT

STROBE

(NOT PROVIDED)

S

TROBE HOOK-UP

WIRE

HEATER ASSEMBLY
MOUNTING SCREW

STROBE MOUNTING BOSS

1

2

3

4

5

6

-

+

+

-

1

2

WARNING LABEL

6. Connect Supervisory Module Connect EOL device (not included) between

pins 1 and 2 of low voltage terminal block. Pins 1 and 2 should then be
connected to the fire alarm supervisory control module.

Note: Fire alarm supervisory control module must be of the latching type only.

Pin 1 Alarm Supervisory
Pin 2 Control Module

EOL
DEVICE

7. Connect Fan Power
Note: Fan will not operate if polarity is reversed. Refer to low voltage

schematic on page 6.
Pin 3 -24 VDC
Pin 4 +24 VDC

8. Connect strobe appliance power

Pin 5 - 16-33 VDC
Pin 6 +16-33 VDC

9. Attach heater assembly to back box using (4) #8-32 x 3/8” flat head
screws into heater assembly mounting bosses on back box (see Fig. 1).
Make sure all service wiring is gathered away from the heater and be
careful not to pinch wire under heater assembly. Fan must be mounted
toward top of
enclosure.

10. Wire strobe using
Teflon coated wire
provided. (White­P os i t i ve /B l a ck ­Negative) and
attach to the strobe
mounting bosses on
heater assembly.

11. Record installation
date on label and in
manual (page 2).

12. Install cover and
gasket with (6) #8­32 x 3/4” socket cap screws and (6) flat washers as shown in Fig. 4.

13. Turn all power to “ON” position.
Note: Fan runs continuously. This system requires three sources of power:

1. 110 or 240 VAC heater on the load side of the fuse holder.

2. 24 VDC power source for the circulating fan. Check fan to see if
operating; if not check polarity and reverse then try again

3. 16-33 VDC fire alarm notification circuit for strobes and temperature
warning monitor.

FIGURE 3

5

Schematic Diagrams

2

AMP FUSE

OVERTEMP SAFETY

1

2

4

3

5

6

CONTROL

110 OR 240 VAC

SINGLE PHASE

4

5

3

6

1

2

STROBE

PWR

FAN
PWR

TEMP

WARNING

SUPERVISOR

_

+

+

_

FAN

LOW TEMP WARNING

STROBE (16-33VDC 600mA)

S

LOW VOLTAGE CIRCUIT

HIGH VOLTAGE CIRCUIT

TERMINAL

BLOCK

TERMINAL

BLOCK

CHASSIS

HEATER

EOL DEVICE

SUPPLIED BY

CUSTOMER

OPEN @ 70˚F

CLOSE @ 50˚F

OPEN @ 120˚F
CLOSE @ 80˚F

OPEN @ 50

˚

F

CLOSE @ 32˚F

(24VDC 90mA)

110 OR 240 VAC 50/60 Hz
100 WATTS

6

9.37 in.(238mm)

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PRODUCT DIMENSIONS

2.87 in.(73mm)

APPLIANCE MOUNTING

BACKPLATE

5.5 in.
(140mm)

7.25 in.(184mm)

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T HUB (2) PROVIDED (WITHOUT HEATER (1) PROVIDED)

LOW TE

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FIGURE 4

Product Assembly

7

Warranty

Three year guarantee against breakage of polycarbonate in normal use
(one year on electro mechanical and electronic components).

Electronic warranty form at www.sti-usa.com/wc14.

Safety Technology International, Inc.

2306 Airport Road

Waterford, Michigan 48327-1209

Phone: [phone] • Toll Free: 800-888-4784 • Fax: [phone]

www.

sti-usa.com

Safety Technology International (Europe) Ltd.

Unit 49G Pipers Road • Park Farm Industrial Estate • Redditch

Worcestershire • B98 0HU • England • Tel: [phone]

Fax: [phone] • Freephone: 0800 085 1678 (UK only)

E-mail: [e-mail] • Web: www.sti-europe.com

Printed in USA SUBJECT TO CHANGE WITHOUT NOTICE Inst. Sht. 1229HTR-HAZ IS SEPT2009