Temperzone ISD 135K, 160K, 200K, 230K Ducted Split System R410A Indoor Units

General Information

These ISD*K indoor units are designed to be coupled with the OSA*RKT outdoor units. Units must be installed in accordance with all national and local safety codes.

Combinations

Various combinations of ISD indoor units and OSA outdoor units are available:

• One ISD 135K with one OSA 135RKSGH
• One ISD 135K with one OSA 135RKTGH
• One ISD 135K with one OSA 140RKSH
• One ISD 135K with one OSA 140RKTH
• One ISD 160K with one OSA 155RKTV
• One ISD 160K with one OSA 160RKTH
• One ISD 200K with one OSA 200RKTH
• One ISD 200K with one OSA 200RKTV
• One ISD 230K with one OSA 230RKTH

Dimensions

Refer to Figure 1 for unit dimensions in millimeters. The manufacturer reserves the right to change specifications at any time without notice or obligation. Certified dimensions are available on request.

Net Weight

• ISD 135K: 50 kg
• ISD 160K: 50 kg
• ISD 200K: 61 kg
• ISD 230K: 74 kg

Options

1. Filter Box c/w polypropylene net filter
2. Spring Mounting Kit
3. Electric Heater Box
4. Supply & Return Air Plenums.
5. SAT-2 Controller kit (for non-digital systems) or TZT-701 Controller kit (for digital systems).

Mounting

Fig. 2 Spring Mounting

It is recommended that the unit be mounted using the spring mounting system, supplied as an optional extra (Fig. 2). This system minimises transfer of vibration into the building structure.

Fig. 3 Solid Mounting

If a more rigid installation can be tolerated, then suspend the unit from four threaded rods (not supplied) and use the 'L' shaped brackets supplied on the unit (reversed). The unit has a built-in sloping drain tray, therefore mount it level. When finally positioned, tighten the lock nuts on the mounting rods from above and below the mounting brackets to give a firm installation (see Fig. 3).

Condensate Drain

The condensate drain should be trapped outside the unit cabinet. The trap should have a vertical height of at least 50 mm. The drain should have a slope of at least 1 in 50 and must not be piped to a level above the unit drain tray. (Refer Fig. 4).

For long condensate pipe runs, fit a vent pipe near the drain trap. The top of the vent pipe must be at least 100 mm above the ISD unit's drain tray.

It is essential that the drainage system for the evaporator is checked by pouring water in the drain tray and seeing that it discharges at the end of the drain and does not overflow the drain tray.

Note: The built-in drain tray can be removed for cleaning (or fan access) by first removing the unit's base.

Condensate Drain Diagram (Fig. 4):

A 'U' trap is required with a minimum vertical height of 50 mm. A vent pipe is recommended for long condensate drain runs, with the top of the vent pipe at least 100 mm above the unit's drain tray. The drain must have a minimum slope of 1 in 50 (20 mm per meter).

Indoor-Outdoor Unit Connections

Refer to the relevant OSA Outdoor Unit 'Installation & Maintenance' pamphlet for piping instructions. For wiring connections, refer to the Outdoor Unit wiring diagram in conjunction with the ISD wiring diagram on this pamphlet.

Refrigeration Piping

Interconnecting pipe size may vary; refer to OSA outdoor unit installation instructions. The ISD is shipped from the factory with a pressurised holding charge of nitrogen. Immediately before removing any brazed pipe connection's seal, reduce the holding charge to atmospheric. Warning: Failure to do so may cause injury.

Electrical Wiring

The electrical supply required (via the Outdoor Unit) is specified on the Outdoor Unit's wiring diagram. Electrical work must be carried out by a qualified electrician in accordance with local supply authority regulations and the wiring diagram.

In a free blow or low resistance application, beware of exceeding the fan motor's full load amp limit (refer Outdoor Unit's wiring diagram).

It is recommended electricians run a spare wire between Outdoor Unit and Indoor Unit in case 'Indoor Fan Off During De-Ice' becomes a requirement. Leave this spare wire unconnected until required. If and when this option is required, the loop wire must be removed between terminals 'N' and '1'.

Wiring Diagram (Page 4):

IMPORTANT WHEN WIRING:

1. Run the following 4 wires from the outdoor unit: N, ACTIVE, HEAT & COMP (As shown on wiring diagram).
2. Optional extra wires from outdoor unit are: From 'DE-ICE' TO TERMINAL 1, if the indoor fan is to be forced off during de-ice cycle. Note! Remove the BLACK wire on the indoor unit between N and terminal 1.
3. The purple wire tied to capacitor body, should only be fitted where one fixed fan speed is required. DO NOT fit this wire for installations with multi speed switches, otherwise damage to motor will occur.

Client Wiring: Interconnections between units by Electric Heat Wiring. NOTE: CHECK WIRING BEFORE SWITCHING ON, INCORRECT CONNECTION WILL DAMAGE MOTORS.

Indoor Fan Motor:

Capacitor:

Wiring Schematic: Refer to the provided wiring diagram for detailed connections.

Indoor Fan Speed

The fan speed can be set to LOW, MED, or HIGH - whichever best suits the application.

If the air returning to the indoor unit is regularly expected to be above 50%RH, then the coil face velocity should be limited to be 2.5 m/s or less (refer Air Handling graph in Technical Data pamphlet).

High humidity levels can occur in tropical or subtropical conditions, and/or when heavily moisture laden fresh air is introduced. Select a fan speed that avoids water carry-over problems.

Thermostats

The temperzone SAT-2 Controller (for non-digital sys.) or TZT-701 Controller (for digital systems) is available as a kit for retro-fitting to this unit.

A dedicated neutral line is required where electronic or anticipator thermostats are used when you choose to have indoor fan off in de-ice.

ISD/OSA Systems with Electric Heater Box

Replace the system's external fuse with the size recommended in the table on the Outdoor Unit's wiring diagram.

Note: Tandem indoor units with electric heat may require greater fuse sizes on the power supply.

Commissioning

Indoor Unit

1. Check that the thermostat is correctly wired and set at the desired temperature.
2. Check that the air filter (if fitted) is clean.
3. Check that the fan runs freely without vibration.
4. Check condensate drain for free drainage.
5. Run the unit in cooling and heating modes.

Maintenance

Weekly (For First Four Weeks)

1. Check air filter (if fitted); vacuum clean as necessary.
2. Check condensate drain for free drainage.

Monthly

1. Check air filter (if fitted); vacuum clean as necessary.

Six Monthly

1. Check condensate drain for free drainage.
2. Check heat exchanger coil; vacuum or brush clean as necessary.
3. Check the tightness of the fan.
4. Check that fan motor is free running.
5. Check tightness of electrical connections.
6. Check air supply at diffuser outlets.

Warning

This unit is designed for use ONLY with the refrigerant HFC-410A (R410A). The use of other refrigerants is NOT authorised or approved by the manufacturer and may cause operational problems such as poor performance and efficiency, loss of capacity, degradation of materials and refrigerant leaks.

The use of flammable or explosive materials as a refrigerant creates the additional risks of fire and explosion which may result in property damage, personal injury or death.

Application Considerations (Fig. 5)

Recommendations for Noise Isolation

Particularly for high static installations:

1. Avoid installing units, with non-ducted return air, directly above spaces where noise is critical.
2. Use flexible connections between unit and rigid ducting.
3. Use generously sized acoustically lined ducts.
4. If generous duct size is not possible, use turning vanes on bends to reduce air turbulence (regenerated noise).
5. Use 90° bends in ducting to significantly assist in noise reduction.

Diagrammatic Representation:

Figure 5 illustrates application considerations for noise isolation. It shows flexible connections for supply and return air ducts, the use of a spring mounting system, and recommendations for locating return air grilles away from the unit to minimize noise transmission. It also indicates alternate filter locations and the use of acoustic insulation and turning vanes in ductwork.

Evacuation Procedure

Refer to the Outdoor Unit 'Installation & Maintenance' pamphlet for evacuation procedure and piping requirements.