HIGH-TEMPERATURE AIR-TO-WATER HEAT PUMPS 61AF 014-019
State-of-the-art concept - Cooperation with specialist laboratories and use of limit simulation tools (ﬁnite element calculations) for the design of the critical components, e.g. motor supports, suction/discharge piping etc. Auto-adaptive control - Control algorithm prevents excessive compressor cycling.
Exceptional endurance tests - Corrosion resistance tests in salt mist in the laboratory. - Accelerated ageing test on components that are submitted to continuous operation: compressor piping, fan supports. - Transport simulation test in the laboratory on a vibrating table.
Pro-Dialog+ combines intelligence with operating simplicity. The control constantly monitors all machine parameters and precisely manages the operation of compressors, expansion devices, fans and of the condenser water pump for optimum energy efﬁciency. Energy management - Seven-day internal time schedule clock: permits unit on/off control and operation at a second set point. - Set point reset based on the outside air temperature or the return water temperature or on the water heat exchanger delta T. - Master/slave control of two heat pumps operating in parallel with operating time equalisation and automatic change-over in case of a unit fault (option). - Start/stop based on the outside air temperature. Ease-of-use - The new backlighted LCD interface includes a manual control potentiometer to ensure legibility under any lighting conditions. - The information is displayed clearly in English, French, German, Italian and Spanish (for other languages please consult Carrier). - The Pro-Dialog+ navigation uses intuitive treestructure menus, similar to the Internet browers. They are user-friendly and permit quick access to the principal operat-ing parameters: number of compressors operating, suction/discharge pressure, compressor operating hours, set point, air temperature, entering/leaving water temperature. - As standard the unit includes a board for the control of a boiler and four electric resistance heater stages.
Remote operating mode with volt-free contacts (standard)
A simple two-wire communication bus between the RS485 port of the AquaSnap high-temperature heat pumps and the Carrier Comfort Network offers multiple remote control, monitoring and diagnostic possibilities. Carrier offers a vast choice of control products, specially designed to control, manage and supervise the operation of a heating system. Please consult your Carrier representative for more information on these products. - Start/stop: opening of this contact will shut down the heat pump. - Dual set point: closing of this contact activates a second heating set point (example: unoccupied mode). - Demand limit: closing of this contact limits the maximum heat pump capacity to a predeﬁned value. - User safety: this contact is connected in series with the water ﬂow switch and can be used for any customer safety loop. - Water pump control. - Alert indication: this volt-free contact indicates the presence of a minor fault. - Alarm indication: this volt-free contact indicates the presence of a major fault that has led to the shutdown of the refrigerant circuit.
Remote interface (accessory)
This accessory includes a box that can be mounted inside the building. The power supply is provided via a 220 V/24 V transformer supplied. This interface allows access to the same menus as the unit interface and can be installed up to 300 m from the 61AF unit.
Pro-Dialog+ operator interface
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