wheelock STH-15S, STH-15S-1 INSTALLATION INSTRUCTIONS

273 Branchport Avenue
Long Branch, N.J. 07740
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www.cooperwheelock. com

INSTALLATION INSTRUCTIONS

STH-15 HORN SPEAKER WITH MULTI-TAP TRANSFORMER

AND CAPACITOR FOR LINE SUPERVISION

Use this product according to this instruction manual. Please keep this instruction manual for future reference.

MODELS:

STH-15S Grey UL Listed under UL 1480 for Speaker Appliances
STH-15SR Red UL Listed under UL 1480 for Speaker Appliances

GENERAL:

The STH-15 is designed for multiple power requirements with high dBA output at each power tap. STH-15 models offer a choice of
field selectable taps, 1 to 15 Watts for either 25VRMS or 70VRMS audio systems. The Series STH-15 design incorporates a
compression driver, mounted on a double re-entrant horn for maximum output at minimum power across a frequency range of 400 to
4,000Hz. The speaker line inputs are compatible with standard reverse polarity supervision of circuit wiring by a Fire Alarm Control
Panel (FACP). A capacitor is wired in series with the multi-tap transformer for this purpose.

NOTE: All CAUTIONS and WARNINGS are identified by the symbol

. All warnings are printed in bold capital letters.

WARNING: PLEASE 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.

SPECIFICATIONS:

Table 1: Wattage Selector Switch Settings and dBA

Setting 70V dB 25V dB

1 0.9W 93 Not Used Not Used
2 1.8W 96 Not Used Not Used
3 3.8W 96 0.48W 90
4 7.5W 99 0.94W 90
5 15.0W 102 1.8W 93
6 Not Used Not Used 7.5W 99
7 Not Used Not Used 15.0W 102

NOTES:

1. Power Handling Capacity (RMS): 15W

2. Sound Dispersion: 70 Degrees

3. Constant Voltage Line: 25V or 70V

4. Frequency Response: 400 - 4,000Hz (@ Full Rated Output)

5. Sound Level (Peak): 120dB @ 15W, 1 Meter

6. Dimensions: 7-7/8W X 8-3/4H X 9-5/16L

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.

Copyright 2006 Cooper Wheelock, Inc. All rights reserved.

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INSTALLATION INFORMATION:

F

S

There is a slotted shaft, underneath the cable entrance interface adapter, which operates a 7-position selector switch. Remove the
interface adapter and set the switch for the desired wattage at the specified speaker line voltage (25V or 70V). Adjust the switch by
turning the slotted shaft until the end of the slot which is opposite the flat on the shaft

points to the desired number. The wattage

provided at each selector number is shown on the decal affixed to the rear of the housing.

MOUNTING INFORMATION:

The horn speakers may be wall mounted by simply using the holes in the swivel base to locate and drill mounting holes. Mount the
base to the surface with appropriate hardware. Slots are also provided in the base for banding straps, to allow mounting to beams,
poles, and girders. The mounting base is also fully adjustable in both the vertical and horizontal planes (See Figure 1).

CAUTION: These devices are not intended for use in hazardous locations as defined by the National Electrical Code (NEC) and
by the National Fire Protection Association (NFPA).

VERHEAD VIEW O
OUNTING BASE

SHOWN WITHOUT

ORN)

Figure 1:

WING NUT FOR ROTATION AND
SWIVEL ADJUSTMENTS

BASE ROTATES 360 DEGREE

BANDING SLOT (2)

MOUNTING HOLE (3)

MOUNTING ARM

SWIVELS

NOTE: Loosening the wing nut will allow for both pitch and rotation of the unit.

CAUTION: When adjusting horn position, be careful not to lose adjusting hardware.

The interface adapter (mounted to the horn) permits conduit connection. The interface adapter is threaded for standard 1/2" pipe, and
will accommodate BX cable, flexible or rigid conduit and matching connectors. The interface adapter is shown in Figure 2 below.

Figure 2: Interface Adapter

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