Unit installation

Installation - Electrical
SCXF-SVX01K-EN 45
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 31,
p. 45 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
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. 45.
The run length of the low voltage AC power wiring to the
remote HI must not exceed three (3) ohms/conductor.
Refer to Table 34, p. 45.
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
WARNING
Proper Field Wiring and Grounding
Required!
All field wiring MUST be performed by qualified
personnel. Improperly installed and grounded field
wiring poses FIRE and ELECTROCUTION hazards.To
avoid these hazards, you MUST follow requirements for
field wiring installation and grounding as described in
NEC and your local/state electrical codes. Failure to
follow code could result in death or serious injury.
Figure 31. Human interface (HI) panel keypad
Table 33. 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
Table 34. 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