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HPT 300 • HPT 300C
In relation with characteristics of typical heat pump cycle temperatures, the cooling fluid
and the free source, an aluminium pipe heat exchanger is placed outside the HPT300(C)
heat pump water heater, which enables to heat sanitary water up to a temperature of
max. 60°C in normal usage conditions. As the HPT300(C) heat pump water heater has
been equipped with a supplementary pipe radiator providing further options: quicker
achievement of full capacity operation by combining the heat pump mode and pipe
radiator mode up to a temperature of max. 60°C. This may be utilised in the course
of antibacterial protection cycles even. In order to ensure sensible energy use during
the operation of the hot water tank, visual signals warn the user, if the appliance is not
operating in the most efficient way, e.g. when the pipe radiator is active.
The appliance operates using two types of power source. As a standalone heat pump
and/or using the electrical pipe radiator. Models HPT300 C and C1 incorporate a heat
exchanger pipe coil (for model HPT300C). Hot water tank of type HPT300C can be
used with multiple energy sources: indirectly from solar energy, or gas-based, coal-
based or other energy carriers; furthermore, the auxiliary electric heating provided
by appliances of type HPT300(C) is controlled by the heat pump unit. All of the three
heating functions can be used simultaneously.
This appliance has two temperature sensors that are placed in the upper flare located
on the closing cover and in the lower flare. The sensor placed in the upper pocket
tube measures the upper temperature, and this number is displayed by the Water
temp indicator, while the sensor placed in the lower pocket tube monitors the lower
temperature, which serves as input data for switch on/ off, but is not displayed.
1.) Economy mode (ECO):
In this mode, only the heat pump operates, as a result of pre-set water
temperature, and the electric heater is not enabled. (The water temperature is 38 to
60 °C at the outlet, while the temperature of the operating environment is -4 to 43 °C)
2.) Hybrid Mode:
In this mode, the equipment splits its operation capabilities to electric heating and
heat pumping, based on the temperature of the water tank. (The water temperature
is 38 to 60 °C at the outlet, while the temperature of the operating environment is -20
to 43 °C)
3.) E-heater Mode:
In this mode, the motors of the compressor and the fan do not work, only the
electric heater operates. In this case, only water located in the upper part of the
tank is heated, which means approximately 100 l. (The water temperature is 38 to
60 °C at the outlet, while the temperature of the operating environment is -20 to 43 °C)
4.) Defreezing through water heating:
In case of Economy Mode and Hybrid Mode, if the evaporating steam freezes in
cold environments, the appliance defreezes it automatically to ensure efficient
performance (3 to 10 min).
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3.3. Water heating methods
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