ALTV248 Series Installation Guide
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Installation Instructions:
1. Mount unit in the desired location. Mark and predrill holes in the wall to line up with the top two keyholes
in theenclosure. Install two upper fasteners and screws in the wall with the screw heads protruding. Place
the enclosure’s upper keyholes over the two upper screws, level and secure. Mark the position of the lower
two holes. Remove the enclosure. Drill the lower holes and install three fasteners. Place the enclosure’s
upper keyholes over the two upper screws. Install the two lower screws and make sure to tighten all screws
(Enclosure Dimensions, pg. 8-10)
. Secure enclosure to earth ground.
2. Slide switch on PD board to the OFF position for models ALTV248 and ALTV248CB
(Fig. 1, pg. 4)
.
Turn OFF main switch on all other models,
(Figs. 2-4 pgs. 5-7).
3. All units are factory set for 24VAC operation.
For 28VAC operation adjust unit prior to mounting and applying power as follows:
Change the wire position so that the black wire [28V] is connected to the terminal marked [P] and the
yellow wire [24V] is connected to the terminal marked [S]
.
4. Connect AC power to the black and white flying lead of the transformer(s)
(Figs. 1-4, pgs. 4-7)
.
Use 18 AWG or larger for all power connections.
5. Measure output voltage before connecting devices. This helps avoiding potential damage.
Terminals marked [1P - 8P] are positive of the same polarity.
CAUTION: Determine the maximum operating voltage of the equipment being powered before
adjusting the output voltage.
6.
Connect devices to the terminals marked [1P - 1N] through [4P - 4N] on PD4/PD4CB board
(Fig. 4, pg. 7)
or terminals marked [1P - 1N] through [8P - 8N] on PD8/PD8CB board
(Figs. 1-3, pgs. 4-6),
carefully observing polarity.
7. Slide switch on PD board to the ON position for models ALTV248 and ALTV248CB
(Fig. 1, pg. 4)
.
Turn main switch on all other models to the “RESET” (ON) position
(Figs. 2-4, pgs. 5-7).
8. Green LED will illuminate when unit is powered.
9. Upon completion of wiring, secure enclosure door with screws (supplied).
Caution: Equipment to be installed / serviced by authorized / trained personnel only.
Shut branch circuit power before installing / servicing equipment.
WARNING: To reduce the risk of fire or electric shock, do not expose the unit to rain or moisture.
This installation should be made by qualified service personnel and should conform to the National
Electrical Code and all local codes.
Terminal Identification:
PD4/PD4CB - Distribution Module
1P - 4P
AC output.
1N - 4N
AC output.
PD8/PD8CB - Distribution Module
1P - 8P
AC output.
1N - 8N
AC output.
The lightning flash with arrowhead symbol within an equilateral triangle is intended to alert the user
to the presence of an insulated DANGEROUS VOLTAGE within the product’s enclosure that may be of
sufficient magnitude to constitute an electric shock.
The exclamation point within an equilateral triangle is intended to alert the user to the presence of impor-
tant operating and maintenance (servicing) instructions in the literature accompanying the appliance.
CAUTION:
To reduce the risk of electric shock do not open enclosure.
There are no user serviceable parts inside.
Refer servicing to qualified service personnel.
