Snow Switch GF PRO - Post-Installation Testing

South Bend, Indiana USA | networketi.com
SNOW/ICE CONTROL INSTALLATION MANUAL | PART NO. 23918 REV B
12
POST-INSTALLATION TESTING
Installation errors cause the majority of system problems.
Therefore, thoroughly check the system before placing it
into service. Simple electrical tests and visual inspection
can identify any wiring errors, as well as improper
waterproong. Visually inspect for proper wiring and
waterproong, making sure that all box joints are sealed
and that all wiring is properly terminated.
In performing the post-installation test procedure as
described below, the heat tape will activate, even if
only for a brief time, so that system performance can be
accurately simulated and measured. For that reason, and
depending specically on the ambient temperature or
general conditions in which the system is being installed,
it is recommended to continuously and carefully monitor
the system and its components during the entire testing
process. High temperatures can cause damage to asphalt
and similar paving materials. Never leave the site during
testing. Never leave the system unattended during
testing. If re or smoke or an abnormal odor is observed
during testing, shut off power to the system and suspend
the test.
To most accurately simulate and measure system
performance, leave the heat tape connected to the
control during testing and use a clamp-on amp meter
as directed in this procedure. Using the clamp-on amp
meter clamped around the wires prevents the operator
from having to touch bare or exposed metal or wiring and
also keeps the operator from having to break the circuit,
all while still allowing the accurate simulation and testing
of the system, including the Ground Fault Equipment
Protection circuitry, if your system is so equipped.
It is the responsibility of the on-site installer to assess
the overall safety concerns at the site and to disconnect
the heat tape, as necessary or desired, whether before
or during this test, as well as to re-establish those wiring
connections at the conclusion of this procedure.
This procedure requires a clamp-on amp meter or
voltmeter. Make sure the gutter and downspout are both
dry before testing the GIT–1 sensor. Record test results
in the appropriate section on page 2 of this manual for
future reference.
CONTROL TESTING
1. Remove system power. There may be two or more
points of disconnect.
2. Open the clear plastic cover and remove faceplate
from the unit. Retain all parts and mounting hardware.
If the heaters have been disconnected for testing,
using a voltmeter, measure the voltage across the two
yellow leads. If the heaters have not been removed
tor testing, using a clamp-on amp meter, measure the
current through the yellow lead.
3. Restore power to the unit. After a brief initialization
routine, the SUPPLY LED should be on, but no other
LEDs. Once initialization is complete, the amp meter
should read 0.
4. With power still running to the unit, turn up the Hold-
On Time dial to a setting higher than 0, then press the
Heater Cycle button. The HEAT LED should come on
and the amp meter should show a reading of less than
the maximum system load as shown on the faceplate.
The voltage across the yellow leads will match the
system voltage. Do not touch the yellow lead ends.
5. Press the Heater Cycle button again. The HEAT LED
will go off and the amp meter reading should drop
back to 0 or the voltage will drop to 0.
Even when the heat tapes are disconnected, as
long as the circuit breaker is on and power is
running to the unit, voltage is still being applied
to the yellow heat tape leads. Therefore, never
touch the ends of the yellow leads or let the
two leads touch each other. Do not let the two
yellow heat tape leads contact any component
inside the unit.
WARNING