Water cooled packaged unit use cycle water as heat source, could be in heating and cooling mode, it is high efficiency energy saving central air conditioning technique. When in cooling, use the cycle water as exhaust heat source. When in heating, use the cycle water as absorb heat source.
Water cooled packaged unit is a central air conditioning system. When the temperature of the water in the water cycle exceed a certain value because of the cooling or heating, normally use the cooling tower to exhaust the heat from the water inside the water cycle. When the temperature in the water cycle is lower than a certain value, normally use heating equipment to supplement heat into the cycle water. When the water temperature inside the water cycle is keep in a certain range, no need the cooling tower and heating equipment, the energy saving affection is obvious.
These air conditioners provide one of the most efficient forms of cooling and/or heating you can invest in, as evidenced by their high EER figures. Each unit include a high efficiency electronically commutated (EC) fan motor. Part load operation at low loads (75% airflow equates to 55% power use) using Amrta algorithms.
Each unit incorporates a high efficiency rotary/scroll compressor. Heat exchange air coils use inner grooved (rifled) tube for better heat transfer.
A dynamically balanced forward curved fan with a multi-speed EC motor enables fine tuning of the indoor unit to match the supply air requirements. These EC motor fans have a fully integrated speed control that enables soft starting. Fan speed can be stepped to your own requirements or continuously variable using a 0–10V DC control signal.
Units are fitted with a high pressure lockout that protects the unit in the event of water flow failure in cooling mode. Sensors protect against low air coil temperature and loss of refrigerant. Units include an anti-rapid cycle timer for compressor on/off protection.
Units also have a low refrigerant pressure sensor to protect against icing-up of the water within the unit's.
Differential pressure switch protect individual units from a loss of water flow.
Convenient lockout contactor resetting is simply achieved by turning the power to the unit off and then on again, avoiding the need to gain access to each unit if the cause is failure of central water supply.
Each compressor has internal overload protection.
Closed cell foam insulation has been used to inhibit mould growth in places where moisture could be present. Bonded polyester insulation ensures no particles are introduced into the air stream.
Panels and frame are made from galvanized steel protected with polyester powder painting to ensure total resistance to atmospheric agents.
Water side heat exchanger
High efficiency coaxial heat exchanger, factory insulated with flexible close cell material. Consists of an inner twisty tube and a steel outer tube. Large tube diameters prevent clogging, unlike brazed type heat exchangers which require mesh strainers.
The air coil is die formed plate type epoxy coated aluminium fins mechanically bonded to high efficiency inner grooved copper tubes.
Each unit is supplied with a washable synthetic fibre EU2/G2 rated filter that is integrated with the return air spigot. This filter complies with AS/NZS 1324.1:2001.
For ducted return air applications, filters should ideally be located in the ceiling return air grille/s and removed from the HWP unit’s return air spigot, thereby improving access for cleaning.
Spring mounting kit
The units Spring Mounting System, supplied with each unit, has been designed to minimise the transfer of vibration from the unit into the building structure. Recommended for use in all installations.
Condensate -Lift Pump – max. lift 800mm.
Electric heat option: 2kW, 3kW, 4kW, 6kW, 9kW, 12kW
1. Nominal cooling capacity test condition: Water side water inlet/outlet 30ºC/35ºC, Ambient temperature DB 27 ºC, WB 19 ºC.
2. Nominal heating capacity test condition: Water side water inlet 20ºC, Ambient temperature DB 20 ºC, WB 15 ºC.
3. Noise level measured in the noise lab with background noise of 25 dB(A), at a distance of 1 m.
4. As our continuous products improvement, Amrta reserves the right to change specifications and design without notice.