4
The SLIMLINE PERFORMER Ceiling Cassette – Ductless Mini-Split
Technical Manual : AIR 8-105.5
Ceiling Cassette
General Description
FACTORY INSTALLED OPTIONS
Controls Option 1:
Electro-Mechanical
The unit shall be factory wired with an electo-mechanical control system that includes the necessry
relays and safety switches for proper unit operation. Terminal strip provide at the unit for the wiring of a
24V wall mounted thermostat required for unit operation.
Controls Option 2:
Microprocessor
A custom designed microprocessor is fitted to the Airedale Cassette to enable room conditions to be
maintained at a user defined set point. Communication to the controller is by a hand held infrared
transmitter or a wall mounted ‘pendant’ transmitter. Each type of transmitter includes a wall mounting
bracket as standard.
Note:
Units with Microprocessor controls can not be connected to a BMS. Select the Electro-Mechanical
controls option, for field installed BMS interface, or the Carel controller version with optional
Lonworks and BACnet network cards.
The microprocessor allows five operating modes: fan only, dry cooling, cooling only, heating only, and
heating/cooling with auto changeover for maximum versatility. A temperature set point between 58ºF and
90ºF can be selected.
The microprocessor monitors indoor coil temperature and return air temperature. The receiver contains a
self diagnostic feature. When a low indoor coil temperature is detected the cooling action is stopped. If a
sensor fails then an alarm is displayed on the fascia mounted receiver. The microprocessor also limits
the number of compressor starts per hour to reduce wear on the compressor.
The infrared/pendant transmitter is used to switch the unit ON/OFF, change temperature settings, fan
speed, operating mode, and to toggle the motorized air sweep (where fitted). The microprocessor also
has a built-in clock which can be activated to enable the unit to be programmed with up to two separate
operating periods on weekdays (Mon-Fri).
The clock provides ON/OFF unit operation and is
not
a night set back or occupied/unoccupied control
function. Mon-Fri will operate as a ‘block’ of days and cannot be programmed independently of one
another. Saturdays and Sundays can each be programmed with up to two separate operating periods
and are programmed independently of the weekdays and each other.
A fascia mounted receiver displays ON/OFF, cool or heat, and timer/alarm status.
Controls Option 3:
Carel Controller
The unit shall be fitted with a programmable microprocessor controller designed to operate the unit
according to pre-engineered control strategies. The Carel controller requires a wall sensor, wall stat or
network interface card.
LonWorks Card for
Carel Controller
The Carel microprocessor controller shall come equipped with a plug-in card allowing for complete
compatibility with FT-10 LonWorks control system.
BACnet Card for Carel
Controller
The Carel microprocessor controller shall come equipped with a plug-in card allowing for complete
compatibility with an MS/TP BACnet control system.
Time Clock Card for
Carel Controller
A time clock (card) shall be provided for “stand-alone” units where time functions, night and weekend
setback, etc. are not transmitted from a building management system or remote central time clock. The
time clock shall have a full 7 day schedule and calendar function incorporated. The 7 day schedule shall
have two adjustable occupied/unoccupied periods per day. The calendar function shall allow 20
calendar periods (start date / stop date = 1 period).
Electric Heat
Electric heating elements will be factory fitted to the unit. Elements are manufactured for maximum
surface area and lower working temperature for improved reliability. Thermal cut out protection switches
are fitted to the electric heat circuit to protect against overheating.
Hot Water Coil
A hot water heating coil will be factory fitted (depending on unit size) in addition to the standard DX or
chilled water coil to provide heating. The coil is manufactured from refrigeration quality copper tubes with
mechanically bonded aluminum fins.
Hot Water Coil Freeze
Protection
The unit shall be fitted with a freeze protection sensor to prevent freezing of the hot water coil assembly.
When the sensor detects a freeze up condition it will force the flow control valve open and prevent the
unit fan(s) from running.
Disconnect Switch
The unit shall be fitted with a power disconnect switch located on the control panel, sized for the full load
amperage of the unit to enable the unit to be disconnected from the power supply prior to any
maintenance.
Step Up Transformer
The unit shall be fitted with a 115V to 230V step up transformer for 115V supply power. Note: This
option is not available for units with Electric Heat.
Wall Mounted Pendant
The unit shall include a wall mounted pendant for communication to the microprocessor controller. The
pendant replaces the standard infrared remote control.
