Temperzone HWP-K Series: Ducted Water Cooled R410A Packaged Air Conditioners

General

The temperzone HWP-K Series represents a range of ducted, water-cooled, packaged air conditioners designed to provide year-round comfort to room occupants. These units are ideal for multi-unit installations such as high-rise office or hotel buildings, where the flexibility of individual zone control is required.

Compact and reliable, these units can be installed above ceilings or in other concealed spaces, saving valuable floor space and providing conditioned air direct to necessary locations. HWP-K Series units are designed for simple duct layouts. For maximum advantage, units should be located as close to the space to be air conditioned as acoustic criteria allows. Multiple small units, utilizing minimal duct lengths, are more economical than a single large central ducted unit.

The HWP-K units are available in four versions:

1. Cooling Only with protection board
2. Cooling Only with SAT-2 thermostat
3. Reverse Cycle with protection board
4. Reverse Cycle with SAT-2 thermostat

Electric Heat is optional on Cooling Only versions. In office buildings, an HWP unit system can provide an ideal off-peak system for occupied areas when the main system is not running (e.g., night time, weekends, holidays). HWP unit systems can provide owner occupiers with individual control, avoiding large central plant room areas, such as in apartment buildings.

Multiple HWP units are typically part of an overall hydronic system that incorporates some form of heat rejection equipment, usually a cooling tower or dry air cooler (radiator). Complementing the HWP Series is the temperzone ACW Series radiators, a range of closed circuit water coolers which serve as the central plant for rejecting heat collected by the HWP units. Refer to your nearest temperzone representative for further information on the ACW Series.

Features

• Refrigerant: Each unit is factory charged with refrigerant R410A, which has zero ozone depletion potential.
• Air Coil: Die formed plate type epoxy coated aluminium fins mechanically bonded to high efficiency inner grooved copper tubes.
• Water Coil: Copper tube in tube type with refrigerant flow in the annular space and water counter flow in the inside tube. Tested to a maximum water pressure of 2760 kPa (400 psi).
• Fans: Forward curved double inlet fans in involute scrolls, fitted directly to a resiliently mounted motor. Speed tappings allow airflow selection to match external duct pressure.
• Construction: Galvanised steel construction, closed cell foam lined compressor and fan compartments, with an insulated and powder coated drain tray for complete moisture protection. The drain tray is easily removed for inspection and cleaning.
• Air Filter: An optional filter integrated return air spigot is available on all models up to HWP 225. HWP 290–445 are supplied with r/a spigot as standard; filter optional. The filter is a washable polypropylene net media. Space should be provided for the filter to be withdrawn to its full length from either side of the unit.
• Compressor: Hermetically sealed high efficiency compressors. Models HWP 35 – 117 have rotary compressors, HWP 139 – 445 have scroll compressors.
• Insulation: HWP units are well insulated to minimise condensation and attenuate noise.
• Unit Protection: Units are fitted with high pressure lockout protection (protecting against water flow failure in cooling mode or fan failure in heating mode). Sensors protect against low air coil temperature and loss of refrigerant. An anti-rapid cycle timer protects the compressor. HWP reverse cycle units also have a low refrigerant temperature safety thermostat to protect against icing and a pump flow verification relay. Lockout contactors can be reset by cycling power. Each compressor has internal overload protection. The HWP reverse cycle version has a low refrigerant temperature limit switch and a reverse cycle valve. Faults can be displayed on the optional SAT-2 Wall plaque, with a non-specific fault output signal for building management systems.
• Electric Heating (Factory Fitted Option): Electric elements have spirally wound stainless steel fins for increased area and low surface temperature. They are totally enclosed and supplied with safety cutouts required to meet AS/NZS 3350.2.40 1997. An optional fan run-on timer for rapid heat dissipation is available.
• Handing: The standard unit is right handed (water connections on the right when facing the discharge side).

Accessories

• Flexible Hoses: HWP 35-225 are supplied with two 600 mm long high pressure hoses for water connections (optional on HWP 290-445). Hoses have female pipe threaded nut fittings and a maximum water pressure rating of 1720 kPa (250 psi).
• Spring Mounting Kit: Supplied with each unit to minimise vibration transfer into the building structure. Recommended for all installations.
• Condensate Lift-Pump: Designed to remove condensate in tight installations where a well sloped drain line (minimum 1 in 50 gradient) is not feasible.

Performance Data

Refer to the following table for an overview of the HWP product range specifications. A detailed Data Sheet for each unit is available on request from your local temperzone representative.

Specifications Overview

The Temperzone HWP-K Series units are compact, ducted, water-cooled packaged air conditioners available in single and three-phase power supply options.

Notes:

• *1 Voltage fluctuation limits: Single Phase models 200-252 V a.c.; Three Phase models 342-436 V a.c.
• *2 Nominal Cooling Capacity at AS/NZS 3823.1.3 conditions: Entering Water Temperature 30°C; Entering Air Temperature 27°C D.B., 19°C W.B.
• *3 Heating Capacity (HWPR version only) at AS/NZS 3823.1.3 conditions: Entering Water Temperature 21°C; Entering Air Temperature 21°C D.B.
• *4 SPL measured to JIS 8616 (1 m from source in an anechoic chamber) at nominal supply air flow, with 1 m insulated duct.
• *5 Pressure Drops based on following water flows: Nominal / Nominal +15%.
• *6 Key to Features & Options: W - Fan blows air through coil; E - Electric heat (factory fitted); G - Condensate Lift-Pump kit; H - High pressure hoses c/w fitting, 600 mm long; F - Filter box; J - Fan run-on timer (factory fitted); S - Spring mounting kit included; V - 24 volt control circuit.

Materials and specifications subject to change without notice due to the manufacturer's ongoing research and development programme.

Application Considerations

• Acoustics: Shorter duct applications will require greater attention to acoustic criteria.
• Mounting: It is recommended that HWP units be mounted using the spring mounting system supplied to minimise transfer of vibration into the building structure.
• Positioning: Consider future servicing and maintenance, such as room for filter removal, when determining installation location.
• Condensate Drain: The condensate drain should have a slope of at least 1 in 50 and must not be piped to a level above the unit drain tray. Condensate drain traps are required on larger models (HWP 77-445). An optional condensate lift-pump is available for installations where a well-sloped drain line is not feasible.
• Air Filters: Ideally, air filters should be located in the ceiling return air grille/s, not on the unit, to reduce resistance and improve access. The total filter area should be twice the cross-sectional area of the HWP return air spigot.
• Circuit Balancing: A circuit balancing valve is recommended for both HWPC and HWPR versions to maintain constant water flow. Nominal water flow rates are provided in the specifications table.
• Water Regulating Valve (HWPC versions only): A head pressure controlled water regulating valve may be used instead of a circuit balancing valve. A Schraeder tee joint adaptor is required to accommodate the valve and the HWP unit's HP switch.
• Quality Management: The manufacturer operates a quality management system that conforms to AS/NZS ISO 9001:2008.

Nomenclature

The nomenclature diagram illustrates the structure of a typical HWP-K Series model number, breaking down each component (e.g., HWP, model size, cooling type, refrigerant, power supply, thermostat integration) to explain its meaning.

Water Supply & Return

Each HWP unit alone (excluding hoses) will withstand a maximum water pressure of 2760 kPa (400 psi). Poor quality water supply must be pre-filtered, and adequate water treatment is essential, particularly where open cooling towers are used. The water supply system must be fitted with a water flow switch and water pump safety interlock to prevent units in the same water circuit from entering fail-safe lockout status due to a loss of water flow. Failure to install these items would require resetting each HWP unit in the system. HWP*R units require a minimum water supply temperature of 17°C.

Recommendations for Noise Isolation

For high static (HWP 96–445) installations, consider the following:

1. Avoid installing units with non-ducted return air directly above spaces where noise is critical.
2. Use flexible connections between the 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.

The noise isolation diagram provides visual guidance on minimizing noise transmission from the HWP units. It shows the recommended use of flexible connections between the unit and ductwork, spring mounting systems to isolate vibration, and suggests acoustic insulation for ducts and strategic placement of return air grilles away from noise-sensitive areas.

Contact Information

Temperzone has offices and representatives across Australia and New Zealand, as well as in Singapore.

Australia

• Sydney: temperzone australia pty ltd, 14 Carnagie Place, Blacktown, NSW 2148. Phone (02) 8822 - 5700. Fax (02) 8822 - 5711. Email sales@temperzone.com.au
• Melbourne: Phone (03) 8769 - 6700. Fax (03) 8769 - 6701.
• Adelaide: Phone (08) 8340 - 0607. Fax (08) 8340 - 2118.
• Perth: Phone (08) 9314 - 3844. Fax (08) 9314 - 3855.
• Townsville: Phone (07) 4773 - 9566. Fax (07) 4773 - 9166.
• Brisbane: Phone (07) 3308 - 8333. Fax (07) 3308 - 8330.
• Newcastle: Phone (02) 4962 - 1155. Fax (02) 4961 - 5101.
• Hobart: Phone (03) 6331 - 4209. Fax (03) 6333 - 0224.

New Zealand

• Auckland: temperzone Ltd, 38 Tidal Road, Mangere South, Auckland 2020. Phone 0-9-279 5250. Fax 0-9-275 5637. Email sales@temperzone.co.nz
• Wellington: Phone 0-4-569 3262. Fax 0-4-566 6249.
• Christchurch: Phone 0-3-379 3216. Fax 0-3-379 5956.

Singapore

• Singapore: temperzone Ltd, 1 Claymore Drive #08-13 Rear Block, Orchard Towers, Singapore 229594. Phone SNG 6733 - 4292. Fax SNG 6235-7180. Email sales@temperzone.com.sg

Visit our website: www.temperzone.biz