Air Source Heat Pump EAP range user manual - www.ecoairpump.co.uk
1. READ IMMEDIATELY
1.1. Important Information
Prior to opening the unit it must be ensured that all electrical circuits are disconnected from the power supply.
During transport, the heat pump must not be tilted more than 45
(in either direction).
The intake and outlet openings must not be restricted nor obstructed.
Do not use any cleaning agents containing sand, soda, acid or chloride as these may damage the surface.
To prevent consequential damage it is imperative that the water circuit be neutralized after cleaning using appropriate
agents.
The unit is not suitable for frequency converter operation.
Work on the refrigeration circuit may be performed by qualified persons only.
1.2. Legal Provisions and Guidelines
This heat pump was designed and built in compliance with all relevant EU directives, DIN and VDE regulations (see EC Declaration
of Conformity). The electrical connection of the heat pump must be performed according to and conforming with all relevant VDE,
EN and IEC standards. Beyond that, all technical connection requirements of the local electrical utility company have to be
observed. On connecting the heating system, all relevant regulations have to be complied with.
1.3. Energy-Efficient Use of the Heat Pump
By purchasing this heat pump you contribute to the protection of the environment. A prerequisite for energy-efficient operation is the
proper design of the heat source system and the heat utilization system.
One of the most important factors of heat pump efficiency is keeping the temperature difference between the heating water and the
heat source as small as possible. It is therefore strongly recommended that the design of both the heat source system and the heat
distribution system be carried out with great care.
A 1 Kelvin (1
C) higher
temperature difference corresponds to an
increase
in power consumption of approx. 2.5%.
When designing the heating system care must be taken that special applications such as
domestic water heating are taken into consideration and dimensioned for low temperature operation. Heat pumps are optimally
suited for
underfloor heating
(surface/radiant heating) applications
due to the low supply temperatures (30 C to 40 C).
During operation it is essential that the heat exchanger is not contaminated as this would increase the temperature difference
resulting in a lower coefficient of performance.
A considerable contribution to the economical operation is made by the heat pump controller provided it is set correctly. For more
detailed information refer to the operating manual of the heat pump controller.
2. PURPOSE OF HEAT PUMP
2.1. Application
The air to water heat pump is designed for use in existing or newly built heating systems.
The heat pump is designed exclusively for the heating of water for space heating and of domestic hot water!
The heat pump is suitable for both mono-energetic and bivalent operation at outdoor temperatures down to -20 C.
2.2. Principle of Operation
Ambient air is drawn in by the fan and passed over the evaporator (heat exchanger). The evaporator cools the air, i.e. it extracts the
heat it contains. In the evaporator, the heat removed is transferred to the working fluid (refrigerant).
With the aid of an electrically driven compressor, the absorbed heat is "pumped" to a higher temperature level through an increase
in pressure and given off to the heating water via the condenser (heat exchanger).
In so doing, the electrical energy is used to raise the heat of the environment to a higher temperature level.
Due to the fact that the heat energy extracted from the air is transferred to the heating water, this type of appliance is referred to as
an air to water heat pump.
The air to water heat pump consists of the following main components: Evaporator, fan and expansion valve as well as the
low-noise compressor, the condenser and the electric control unit.
In the case of low ambient temperatures, air humidity may accumulate on the evaporator in the form of frost impairing the heat
transfer. The evaporator is automatically defrosted by the heat pump, as required, with the possibility of vapor plumes forming at
