wheelock STH-4M30WC INSTALLATION INSTRUCTIONS
273 Branchport Avenue
Long Branch, N.J. 07740 Thank you for using our products.
(800) 631-2148
www.wheelockinc.com
SERIES STH CLUSTER SPEAKER ASSEMBLY
INSTALLATION INSTRUCTIONS
(WEATHERPROOF)
Use this product according to this instruction manual. Please keep this instruction manual for future reference.
GENERAL:
The series STH-4M30WC Cluster Speaker Assembly is designed for ceiling, wall or roof mounting in high ambient noise level
environments. The Series STH-4M30WC Cluster Speakers are a speaker/visual alerting system, equipped with four STH-30 horn
loudspeakers, and a DC-MAX-C Strobe, mounted to a NEMA 4X rated fiberglass enclosure, 13.50"W X 15.50"L X 6.25"D.
Speakers and Strobe are pre-wired to the internal terminal block. The Series STH-4M30WC appliances are weatherproof.
The STH-30 loudspeaker provides multiple power requirements with high dBA output at each power tap. Factory setting for each
speaker is 30 Watts, at 70 Volts, (Setting #5). The ST-H30 design incorporates a compression driver, mounted on a double re-entrant
horn for maximum output at minimum power. The speaker line inputs are compatible with standard supervision of circuit wiring by
a Voice Control Panel. A capacitor is wired to the terminal block in series with the speaker for this purpose.
The DC-MAX-C strobe is a 5-inch tall, 6.2-inch diameter, cylindrical strobe light. The DC-MAX-C strobe provides a highly visible,
clear lens, 100 candela and 60 double flashes per minute that can be seen in all directions. It operates on all standard voltages from
10.5VDC to 31.0VDC, and contains a blocking diode that allows this device to be supervised using standard reverse polarity.
: All
NOTE
WARNING: READ THESE INSTRUCTIONS CAREFULLY. FAILURE TO COMPLY WITH ANY OF THE FOLLOWING
INSTRUCTIONS, CAUTIONS AND WARNINGS COULD RESULT IN IMPROPER APPLICATION, INSTALLATION AND/OR
OPERATION OF THESE PRODUCTS IN AN EMERGENCY SITUATION, WHICH COULD RESULT IN PROPERTY DAMAGE,
SERIOUS INJURY OR DEATH TO YOU AND/OR OTHERS.
CAUTIONS
and
WARNINGS
are identified by the symbol . All warnings are printed in bold capital letters.
SPECIFICATIONS (SPEAKER):
Each speaker has a slotted rotating switch used to change the dB setting for the output. Table 1 shows the settings and the outputs.
Table 1: Speaker Output
Setting dB at 1 Meter Watts at 70V
1 113 2.0W
2 116 3.8W
3 119 7.5W
4 122 15.0W
5 125 30.0W
6 Not Used Not Used
7 Not Used Not Used
WARNING: WHEELOCK STRONGLY RECOMMENDS THAT THE VOLTAGE APPLIED TO THESE PRODUCTS BE WITHIN
THEIR RATED INPUT VOLTAGE RANGE. THE APPLICATION OF IMPROPER VOLTAGE MAY RESULT IN DEGRADED
OPERATION OR DAMAGE TO THESE PRODUCTS, WHICH COULD RESULT IN PROPERTY DAMAGE AND SERIOUS INJURY
OR DEATH TO YOU AND/OR OTHERS.
NOTES
: (Per Speaker)
1. Power Handling Capacity (RMS): 30W
2. Sound Dispersion: 70 Degrees
3. Constant Voltage Line: 70Vrms
PRESSURE
LEVEL
4. Frequency Response: 275-10KHz
5. Sound Level (Peak): 125dB at 30W, 1 Meter
5. Dimensions: 10"D X 10-1/2"L
Copyright 2001 Wheelock, Inc. All rights reserved.
Distance from horn (Feet on axis)
P84196 C
Sheet 1 of 4
CAUTION: Do not place switch in settings marked "not used". Failure to comply with these restrictions may cause damage to
components and will void the warranty.
STROBE:
Table 2A: Rating Per UL 1638
Model
Code
Lens
Color
Rated
Voltage
Input
Current
Flash
Rate
Typ. Eff.
Candela
DC-MAX-C Clear 10.5 to 31.0 VDC See Table 2B 60/Min Typical 100cd
Table 2B: DC-MAX-C Input Current Versus Input Voltage
Voltage (VDC) 12 24
Current (mA) 1010 470
NOTES:
1. Temperature range for all models is -30°F to +150°F (-35°C to +66°C) and maximum humidity is 95%.
2. Flash energy and flash rate are specified for double flash operation.
3. Effective candela is measured per IES specifications.
If the strobe fails to operate make sure the correct voltage is being supplied to the strobe leads. If the unit still fails to operate call
Wheelock Customer Service/Tech Support at (800) 631-2148.
NOTE: No field repairs other than lens replacements are recommended.
INSTALLATION INSTRUCTIONS:
SPEAKER WATTAGE SELECTOR SWITCH SETTING:
1. Remove the cable entrance interface adaptor and gasket.
2. Adjust the Speaker Wattage Selector Switch for the desired dB and wattage setting (Table 1) for each speaker. Note: Factory
preset is 30 Watts, Setting 5.
3. Reinstall the cable entrance interface adaptor and gasket.
APPLICATION NOTES:
1. Mount the speaker assembly to the desired location.
2. Loosen the 2 Phillips screws to open the enclosure for wiring. (Figure 1)
3. Tighten the 2 Phillips screws to close and seal the enclosure.
4. Loosen the wingnut prior to adjusting the speaker.
5. Adjust speaker orientation for desired direction of sound. Note: Speakers must not be set in a position that will allow water to
accumulate in the speaker.
6. Be sure to keep all wire connections in phase. If wiring is out of phase (+ to + and - to -), lower volume may result.
Figure 1: Phillips Screw Location
S1
INC.
LONG BRANCH, NJ
COVER AND STROBE
LONG BRANCH, NJ
S4
INC.
INC.
S2
LONG BRANCH, NJ
PHILLIPS SCREWS - 2X
LONG BRANCH, NJ
INC.
S3
: Weatherproof 1/2" conduit fitting is provided for the power wire entrance. Conduit tubing should be rated as weatherproof
NOTE
material that is comparable to weatherproof conduit fitting on the enclosure.
WARNING: THE MAX INDUSTRIAL STROBES ARE NOT TO BE USED AS AN INDOOR VISUAL EVACUATION
SIGNAL FOR THE HEARING IMPAIRED.
P84196 C
Sheet 2 of 4
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