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Ducted Split System Air Conditioners
ISD 380–950 Series
Soft Starting
EC motor models* - EC motors are soft
starting therefore have none of the
problems associated with high in rush
current.
Control Option
EC motor models* - Fixed and stable air
flows can be achieved through use of a
differential pressure transducer and
controller (supplied by others) to
compensate for varying duct static
pressures caused by dirty filters or
modulating dampers. Commissioning is also
made easier. The system is set up for the EC
motor to be controlled variably by a 0–10
volt DC signal that can be supplied either by
a BMS system, a sophisticated controller or
temperzone’s optional TZT-100 Controller;
the optional Signal Isolator will be required in
this instance for ISD 380KBY models.
Systems’ using UC6 controller* are BMS
compatible with multi-unit control possible
– either via digital and analogue signals or via
Modbus. Refer to temperzone for protocols
available.
Insulation
Closed cell foam insulation has been used in
the indoor unit’s cabinet to ensure no
particles are introduced into the air stream.
The insulation is foil faced and meets fire
test standards AS 1530.3 (1999) and BS 476
parts 6 & 7.
Self Diagnostics
Systems that includes a controller (UC6)
have a 7 segment LED display to indicate
faults and running conditions. Many
operating status conditions (including
history) can be determined, without gauges,
simply by using the optional UC6 Service
Interface graphical display tool.
Note: OSA 870/950 use OUC4 controller.
OPTIONAL EQUIPMENT
Outdoor Unit:
UC6 Service Interface tool (OSA 310–670 only)
Indoor Unit:
1. Vertical supply air configuration.
2. Filters - EU4/G4 rated.
3. temperzone TZT-100 Room T/stat, or SAT-2 (24V) Controller kit
(for non-digitals).
4. Signal isolator (Item no. 201-000-129) for using EC motors
in a 0–10V DC continuously variable speed mode on
ISD 380KBY models.
SAFETY FEATURES
1. HP and loss of refrigerant protection.
2. Anti-rapid cycle timer and internal overload for compressor
protection.
3. Circuit breaker control circuits.
4. Time-and-temperature controlled electronic de-ice switch
prevents icing up of the outdoor coil during heating cycle.
5. Frost protection on cooling cycle.
6. Sensor fault indication.
7. Compressor minimum run time to ensure oil return.
8. Crankcase heater prevents liquid refrigerant condensing in the
compressors during the 'off' cycle.
9. Phase rotation protection device.
10. 24V control circuit
COMPRESSOR
Each high efficiency scroll type compressor is hermetically sealed,
quiet running and supported on rubber mounts to minimise
vibration.
REFRIGERATION PIPING
The standard unit allows for a line length up to 60 m or more ; refer
specifications table pages 19 & 20.
Max. height separations between units are:
Outdoor unit above indoor unit: 20m
Outdoor unit below indoor unit: 20m.
Each OSA is shipped from the factory with a charge of R410A
refrigerant sufficient for a 10m line length. Liquid and suction service
valves are provided. Accurator expansion devices control the flow of
refrigerant. The matched indoor unit is shipped with a holding charge
of nitrogen. Both units have brazed pipe connections.
WIRING
The electrical supply required is:
3 phase 380–415 V a.c. 50 Hz with neutral and earth.
The compressor crankcase heater requires a 24 hour power supply.
A control panel, located in each outdoor unit, is fully wired ready to
accept the main power supply. Each system complies with the
requirements of the Regulatory Compliance Mark (RCM) for
electrical safety (AS/NZS 60335.2.40) and EMC (AS/NZS CISPR.14).
* Refer Specification tables (p.19/20) to identify
applicable models
