SCXF-SVX01B-EN
41
Pre-Startup
Requirements
Figure I-PR-23. Human interface (HI) panel keypad.
Remote Human Interface
Panel Installation
Human Interface (HI) Panel
The HI enables the user to communicate
necessary unit operating parameters and
receive operating status information
from within the occupied space.
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 I-PR-
23 to reference the HI 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 person-
nel. 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 I-PR-2.
The run length of the low voltage AC
power wiring to the remote HI must not
exceed three (3) ohms/conductor. Refer
to Table I-PR-3.
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 I-PR-2. Maximum Communication
Link Wiring Length
Max. Wire
Max. Capaci-
tance
Length
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
Table I-PR-3. Wiring Recommendations for
the Remote HI Panel
Distance from Unit
Recommended
to Remote HI
Wire Size
0-460 feet
18 gauge
461-732 feet
16 gauge
733-1000 feet
14 gauge
Installation
