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Chapter 2: Installation
13
to run freely in open air; under such conditions, the OMA-
P1104 is susceptible to serious damage during a lightning
storm. Depending upon the distance outdoor wiring must
travel, consideration should be given to use of shielded wire
inside a metal conduit. Both shield and conduit should be
connected to earth ground. This prevents stray voltage from
entering the unit.
sensor
Model 1104
Figure 2-10. Potential Sensor Damage from Stray Electrical Noise
2.13 Disconnecting the OMA-P1104 for Storage or
Seasonal Use.
If you plan to employ the OMA-P1104 as a seasonal “watch-
dog” for a few months during the year, you m ust disconnect
all wires fr om the unit completel y to a void dama ge to the
circuitry when the unit is not in use . If the unit is unplugged
but left in place with all the sensors still connected, the wires
act as antennae that draw in any stray “electrical noise” from
such devices as fans, blowers, microwaves, etc.
Additionally, it is important to remove the batteries, or they will
discharge until they fail.
Preserve your OMA-P1104 during the off-season, or
when not in use:
• Remove the sensor wires at the screw terminals