Trane IntelliPak SCRF 25, Installation, Operation And Maintenance Manual

Page: 51 / 120

SCXF-SVX01Q-EN 51
The HI displays top level information in the LCD
window, unless the operator initiates other displays,
for the various unit functions. It also displays menu
readouts in a clear language 2 line, 40 character format.
The 16-key keypad allows the operator to scroll
through the various menus to set or modify the
operating parameters. See figure below to reference
the Human Interface (HI) panel keypad.
Figure 27. Human interface (HI) panel keypad
Remote Human Interface Panel
The remote human interface (RHI) panel is identical to
the unit mounted HI with the exception of the “unit
select” key. This key allows the operator to switch from
one unit to the next to program or view status
information regarding a particular unit.
The RHI functions the same as the unit mounted HI
with two exceptions. The first is the
test start function.
The operator can view the service parameters, but can
only initiate the service test function at the unit. The
RHI door has a locking screw to deter access by
unauthorized personnel. Additionally, the RHI can
control up to four different units.
Location Recommendations
The HI microprocessor module is mounted inside a
molded plastic enclosure for surface mounting. It is not
weatherproof. Therefore, it is only applicable for indoor
use.
Locate the RHI panel in an area that will ensure the
communication link between the panel and the unit(s)
does not exceed 5,000 feet maximum or pass between
buildings. See
Table 33, p. 51 .
The run length of the low voltage AC power wiring to
the remote HI must not exceed three ohms/conductor.
Refer to
Table 33, p. 51 .
Table 32. Maximum communication link wiring
length
Max. Wire Length
Max. Capacitance
Between Conductors
1,000 ft up to 60 pf/ft
2,000 ft up to 50 pf/ft
3,000 ft up to 40 pf/ft
4,000 ft up to 30 pf/ft
5,000 ft up to 25 pf/ft
Note: pf/ft = picofarads/foot
Ambient Temperature and Humidity
Limits
Ambient operating conditions:
• Temperature: 32 to 120°F
• Relative humidity: 10 to 90%, non-condensing
Ambient Storage Conditions
• Temperatures: -50 to 200°F
• Relative humidity: 5 to 95%, non-condensing
Table 33. Wiring recommendations for the remote HI
panel
Distance to Remote HI Recommended Wire Size
0-460 feet
18 gauge
461-732 feet
16 gauge
733-1000 feet
14 gauge
Mounting the Remote Human
Interface (RHI) Panel
The installer must provide all mounting hardware such
as; hand tools, electrical boxes, conduit, screws, etc.
Refer to
Figure 28, p. 53 for the mounting hole and
knockout locations.
Procedure
Refer to Figure 28, p. 53 and follow the procedure
below for mounting the remote HI panel on a 4" x 4"
electrical junction box. Place the microprocessor in a
clean dry location during the enclosure mounting
procedures to prevent damage.
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