7
Locate the “Gnd” terminal block shown in Figure 6-1. Insert a bare #14 copper
ground wire into this location. Connect the opposing end to a 5/8” diameter x 8’
long ground rod a minimum of 10 feet away from this location in accordance with
the American Society of Irrigation Consultants grounding specifications.
http://www.asic.org/uploads/assets/011007_121320_ASIC_GROUNDING_
GUIDELINES.doc
Note: Avoid sharp bends in the ground wire where a surge can jump to
other conductors when a surge occurs.
5. Connecting the Novo to an AC Power Source
Connect the Novo to a 120 or 230-volt, 50 or 60Hz power source using an
Underhill external transformer part number TW-35VA-115v or TW-35VA-230v
models.
Note: Make the wire connections to the Novo terminal block first then plug
the opposing end of the transformer into the appropriate power source.
Locate the two small terminal block labeled as “AC” on the Novo terminal block
shown in Figure 7-1 below.
AC INPUTS
Figure 7-1
These are non-polarized terminals meaning either wire from the transformer can
be terminated in either one of the two terminals. Tighten with a small screwdriver.
Note there is a gray set of terminals for a future feature not offered in this
unit’s software version.
6. Adding more than 32 Stations
The Novo can manage up to 63 stations, given a host controller has this capability.
Note: The Sender(s) must be programmed prior to wiring into a host
controller.
To add more than 32 stations, install Underhill “Senders” p/n TW-SEN-8 in 8-station
increments (see Figure 8-1). Connect the thick red and black Sender wire to the
2Wire path (L1 & L2) as it exits the Novo (see Figure 3-1).
