2
Specifications subject to change without notice. IM-KSAIC03-03
INTRODUCTION
The 24V Interface provides further flexibility, functionality and
control allowing a single zone or a multi-zone ductless system to be
controlled by any 3rd party single-stage conventional thermostat*
keeping the Inverter compressor operating as a variable-speed system,
making adjustments to maintain more consistent operation.
Additionally the 24V interface provides compatibility between a
ductless single zone outdoor unit, an approved residential
conventional fan coil and a 3rd party single-stage conventional
thermostat*.
Features:
• Keeps the Inverter compressor operating as a variable-speed
system
• One 24V Interface Kit per indoor head is required
• Rated for outdoor and indoor mounting
• 24V transformer built-in (for ductless applications)
• Dry mode contact for active dehumidification control (for ductless
applications)
• Remote on/off contact
• Auxiliary heat control through the third party conventional
thermostat**
• Diagnostic code display LEDs
Notes:
• *A conventional 5-wire thermostat is required.
• **A secondary output is necessary for auxiliary heat control
ACCESSORIES
The system is shipped with the following accessories (see Table 1).
Use all of the installation parts and accessories to install the system.
Improper installation may result in, electrical shock and fire, or cause
the equipment to fail. Keep the installation manual in a safe place and
do not discard any accessories until the installation has been
completed.
Table 1 — Accessories
Table 2 — Accessories
EXPLOSION HAZARD
Failure to follow this warning could
result in death, serious personal injury,
and/or property damage.
Never use air or gases containing oxygen
for leak testing or operating refrigerant
compressors. Pressurized mixtures of air
or gases containing oxygen can lead to
an explosion.
WARNING
INSTALLATION
Entrust a licensed contractor to install the unit. Installation by
unskilled persons may lead to improper installation, electric
shock, or fire. Re-installation must be performed by authorized
professionals. Non-compliance may lead to electric shock or fire.
WARNING
No.
Description
Qty
Remarks
1
24V Interface Control box
1
N/A
2
Installation Manual
1
N/A
3
Screws
3
M4X20 (for wall mounting)
4
Wall Anchors
3
For wall mounting
7
Return Air Thermistor Assembly
(Hybrid Solutions) (RCD part
number 11201007003448)
1
Required and installed near
or on the unit and on the air
inlet side
8
16ft. (5m) Return Air Thermistor
Assembly Extension Wires (RCD
part number 17401204010126)
1
For a Return Air
Temperature Sensor T1 on
Conventional Fan Coil
Solutions
No.
Description
Qty
Type
Remarks
1
Switch Box
1
N/A
N/A
2
Wiring Tube (insulating sleeve
and tightening screw)
1
N/A
N/A
Wires must be properly sized according to the NEC/NFPA 70, CEC and all
prevailing codes, ordinances and standards.
All conductors must be installed with a strain relief eliminating stress on the
wire following installation which may result in wire damage and/or
overheating with a potential for fire.
Installation must be performed in accordance with the requirement of NEC
and CEC by authorized personnel only.
All wiring to be rated for the control box amperage rating.
All wiring installed to meet general industry standards and practices,
Do not install near flammable liquids or gases.
Do not operate the unit with wet hands, as this could lead to electrical shock.
WARNING
When connecting with RS 485 communication to the outdoor unit,
shielded wire must be used and grounded at one end only.
When using shielded wire the cable should be grounded at one end to
reduce EMI.
Return Air Temperature Sensor T1 cable shall not exceed 23ft (7m)
CAUTION
