Temperzone ISD 230K / OSA 230RKTH Ducted Split System Air Conditioner

General Information

The ISD indoor unit, combined with the associated OSA outdoor unit, forms a reverse cycle (heat pump) split system air conditioner. It is designed and developed to comply with AS/NZS 3823 specified conditions and has been tested for cooling operation in outdoor temperatures up to 50°C.

Applications: These units are suitable for air conditioning light commercial and residential premises such as offices, motels, shops, and homes.

Features

• Refrigerant R410A: Uses refrigerant R410A, which has zero ozone depletion potential.
• Efficient: Features a high-efficiency scroll compressor and heat exchange coils with inner grooved (rifled) tubes for improved heat transfer.
• Performance: Equipped with a dynamically balanced forward-curved fan and a multi-speed motor for precise air flow adjustment. Includes a temperature-sensing head pressure control for compensation of outdoor ambient temperatures.
• Quiet Operation: The compressor is housed in a sound-insulated compartment, and the indoor unit is also insulated to minimize noise.
• Slimline Design: The compact, upright design of the outdoor unit allows for minimal side clearance (150 mm) when installed against a wall, making it practical for restricted spaces. Vertical discharge grilles are available to deflect prevailing winds and reduce clearances. The unit can be free-standing or wall-mounted using optional brackets.
• Durable Construction: Outdoor coil fins are epoxy-coated for protection against corrosive environments. The outdoor unit cabinet is made of high-grade galvanized steel with a polyester powder coating (grey) for weather resistance (IP 45). External fasteners are stainless steel. Heat exchange coils use aluminum plate fins on mechanically expanded rifled copper tubes. The indoor unit cabinet is constructed from high-grade galvanized steel with a plastic drain tray for corrosion resistance.
• Service Access: The indoor unit's drain tray is removable for easy cleaning and service.
• Insulation: Closed-cell foam insulation with a foil facing is used in the indoor unit's cabinet to prevent particle release into the airstream. The insulation meets fire test standards AS 1530.3 (1989) and BS 476 parts 6 & 7.
• Mounting: The indoor unit can be mounted rigidly or using optional spring mounting brackets to minimize vibration transfer.
• Self Diagnostics: The Outdoor Unit Controller (OUC) features LEDs to indicate faults and operating conditions, with a non-specific fault indicator for external system interface.

Optional Equipment

Outdoor Unit:

• Vertical discharge grille (2 required)
• Anti-vibration mounts (rubber)
• Drain connection - right angle

Indoor Unit:

• Filter box with integrated return air spigot and washable polypropylene net filter
• Temperzone SAT Controller
• Spring Mounting Kit
• Supply and return air plenums
• Safety drain tray

Safety Features

• High pressure and loss of refrigerant protection.
• Anti-rapid cycle timer and internal overload for compressor protection.
• Circuit breaker control circuits.
• Time-and-temperature controlled electronic de-ice switch prevents icing during heating.
• Frost protection on cooling cycle.
• Sensor fault indication.
• Compressor minimum run time to ensure oil return.

Compressor

Each high-efficiency scroll compressor is hermetically sealed, quiet running, and mounted on rubber to minimize vibration.

Refrigeration Piping

The standard unit supports line lengths up to 30 meters. For lengths between 30m and 60m, consult the Temperzone Split Systems Installation Guide. The maximum line length is 60m, with maximum height separations of 20m (outdoor unit above or below indoor unit).

The OSA 230 is shipped with a charge of HFC-410A (R410A) refrigerant sufficient for a 10m line length. Liquid and suction service valves are provided, with Accurator expansion devices controlling refrigerant flow. The indoor unit is shipped with a nitrogen holding charge. Both units feature brazed pipe connections.

Wiring: The electrical supply required is 3-phase 342-436 V a.c. 50 Hz with neutral and earth. The compressor crankcase heater requires a 24-hour power supply. A control panel in the outdoor unit is pre-wired for main power supply connection.

Temperzone operates a quality management system conforming to AS/NZS ISO 9001:2000.

Air Handling

Note: Airflows are for a dry coil. Reduce airflow by 5% in high moisture removal conditions. In free blow applications, ensure the indoor fan motor's full load amp limit is not exceeded. Fan airflows provided are for units installed without filters.

A graph illustrates airflow (l/s) versus external pressure (Pa) for different fan speeds (LOW, MED, HIGH), showing input power (W) and current (A) for each speed. Another graph shows airflow (l/s) versus input power (W) for different fan speeds.

Air Flow Correction Factors: Factors are provided for -20%, -10%, 0%, and +10% indoor air flow adjustments, affecting total and sensible capacity.

Pipe Length Capacity Loss: A table indicates the percentage loss in cooling cycle capacity due to pressure drop for different pipe sizes and lengths. It also provides additional pipe length allowance per bend and suction pipe size.

Performance Data

Cooling Capacity (kW)

Tables provide cooling capacity data (Total and Sensible) based on Indoor Unit Entering Air Temperature (E.A.T.) and Outdoor Coil Entering Air Temperature (°C D.B.).

Indoor Air Flow Correction Factors: A table shows correction factors for airflow adjustments.

Heating Capacity (kW)

Tables provide heating capacity data (Gross and Net) based on Indoor Unit Entering Air Temperature (°C D.B.) and Outdoor Coil Entering Air Temperature (°C D.B.).

Sound Levels

Indoor Unit - Supply Air Outlet

Tables show Sound Power Levels (SWL) in dB(A) for different fan speeds (LOW, MED, HIGH) across various octave band frequencies (125 Hz to 4 kHz).

Outdoor Unit

Tables show Sound Power Levels (SWL) in dB(A) and Sound Pressure Levels (SPL) in dB(A) at 3 meters for different fan speeds (LOW, MED) across various octave band frequencies (125 Hz to 4 kHz).

Dimensions (mm)

ISD 230K Indoor Unit

Diagrams show the dimensions of the ISD 230K Indoor Unit, including mounting centers, overall dimensions, and access panel locations. Net weight is 74 kg, and shipping weight is 83 kg.

OSA 230RKTH Outdoor Unit

Diagrams illustrate the dimensions of the OSA 230RKTH Outdoor Unit, including clearances, refrigerant connections, electrical box, and drain holes. Net weight is 179 kg, and shipping weight is 183 kg.

Recommended Pipe Line Sizes: Liquid: 13 mm OD, Suction: 22 mm OD.

Note: Materials and specifications are subject to change without notice due to ongoing research and development.

Contact Information

Temperzone Limited

• Head Office, Auckland: 38 Tidal Rd, Mangere, N.Z. Private Bag 93303, Otahuhu, NEW ZEALAND. Email: sales@temperzone.co.nz Website: www.temperzone.biz
• Temperzone Australia Pty Ltd
• Head Office, Sydney: 35 Bessemer St, Delivery Centre, Blacktown, NSW 2148, AUSTRALIA. Email: sales@temperzone.com.au

Branch locations and contact details are provided for Auckland, Wellington, Christchurch, Sydney, Melbourne, Brisbane, Newcastle, Adelaide, Perth, Townsville, and Hobart.

The company is registered AS/NZS ISO 9001:2000.