2
947190
POWER ADJUSTMENTS
If necessary, remove the power tap selection wire
(white wire) and reattach it to the desired power
tap. The numbers on the terminal strip indicate the
output in watts for a 70-volt paging system (on a
25-volt paging system, the output will be approxi-
mately 1/8 of that indicated (see Table 1)).
Reassemble the two halves of the speaker case
by reinstalling the eight bolts.
CONNECTION TO AMPLIFIER
Exercise special care in removing back cover of
explosion proof driver enclosure (Part 1) to avoid
damaging machined surfaces. Prior to reassem-
bly, make certain that joining surfaces of enclo-
sure are free of dirt. Tighten all cover bolts
completely. To provide the specified protection in
hazardous locations, please note that no com-
pound of any type is to be applied on machined
flange.
TABLE 1. 40-Watt Explosion Proof
Impedance 70V Power 25V Power
Tap Setting Ohms
Watts
Watts
1
2K
2.50
0.330
2
1K
5.00
0.650
3
500
10.0
1.30
4
250
20.0
2.60
5
125
40.0
4.80
TECHNICAL ASSISTANCE
When calling, have a VOM and a telephone test
set available and call from the job site. Call (540)
427-3900 and ask for PagePac Technical Sup-
port, or call (540) 427-6000 for Valcom 24-hour
Automated Support. Visit our websites at
http://www.pagepac.com and www.valcom.com.
Should repairs be necessary, attach a tag to the
unit clearly stating company name, address,
phone number, contact person, and the nature of
the problem. Send the unit to:
Valcom, Inc.
PagePac
®
Repair Dept.
5614 Hollins Road
Roanoke, VA 24019-5056
1
2
3
F R O M A D A P T E R
C O N N E C T T O D E S I R E D
P O W E R T A P
E a c h e x p l o s i o n - p r o o f s p e a k e r h a s
a o n e - h a l f - i n c h c o n d u i t a c c e s s i n t o
t h e s e a l e d c a s e . C o n d u i t e n t r y i n t o
t h e s p e a k e r m u s t b e m a d e i n
a c c o r d a n c e w i t h l o c a l c o d e s f o r t h e
C l a s s a n d G r o u p o f s p e a k e r b e i n g
u s e d . S e e C o n n e c t i o n P r o c e d u r e s .
40
W
20
W
10
W
5W
2.
5W
1
2
3
Each explosion proof speaker has a one-
half-inch conduit access into the sealed
case. Conduit entry into the speaker must
be made in accordance with local codes
for the Class and Group of speaker being
used. See Connection Procedures.
CONNECT TO DESIRED POWER TAP
FROM AMPLIFIER
40W
20
W
10
W 5
W 2.
5W
3
2 1
3
Figure 1
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