HIGH-TEMPERATURE AIR-TO-WATER HEAT PUMPS
61AF 014-019
Superior reliability
■■ 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.
Controls
Pro-Dialog+ operator interface
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.
HEATING
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 tree-
structure 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.
AIR TREATMENT
Pro-Dialog+ control
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Circuit B Total Capacity
START/STOP
ENTER
CONTROLS
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